hgrc(5) — Linux manual page

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HGRC(5)                      Mercurial Manual                     HGRC(5)

NAME top

       hgrc - configuration files for Mercurial

DESCRIPTION top

       The Mercurial system uses a set of configuration files to control
       aspects of its behavior.

TROUBLESHOOTING top

       If you're having problems with your configuration, hg config
       --source can help you understand what is introducing a setting
       into your environment.

       See hg help config.syntax and hg help config.files for information
       about how and where to override things.

STRUCTURE top

       The configuration files use a simple ini-file format. A
       configuration file consists of sections, led by a [section] header
       and followed by name = value entries:

       [ui]
       username = Firstname Lastname <[email protected]>
       verbose = True

       The above entries will be referred to as ui.username and
       ui.verbose, respectively. See hg help config.syntax.

FILES top

       Mercurial reads configuration data from several files, if they
       exist.  These files do not exist by default and you will have to
       create the appropriate configuration files yourself:

       Local configuration is put into the per-repository <repo>/.hg/hgrc
       file.

       Global configuration like the username setting is typically put
       into:

       • %USERPROFILE%\mercurial.ini (on Windows)

       • $HOME/.hgrc (on Unix, Plan9)

       The names of these files depend on the system on which Mercurial
       is installed. *.rc files from a single directory are read in
       alphabetical order, later ones overriding earlier ones. Where
       multiple paths are given below, settings from earlier paths
       override later ones.

       On Unix, the following files are consulted:

       • <repo>/.hg/hgrc-not-shared (per-repository)

       • <repo>/.hg/hgrc (per-repository)

       • $HOME/.hgrc (per-user)

       • ${XDG_CONFIG_HOME:-$HOME/.config}/hg/hgrc (per-user)

       • <install-root>/etc/mercurial/hgrc (per-installation)

       • <install-root>/etc/mercurial/hgrc.d/*.rc (per-installation)

       • /etc/mercurial/hgrc (per-system)

       • /etc/mercurial/hgrc.d/*.rc (per-system)

       • <internal>/*.rc (defaults)

       On Windows, the following files are consulted:

       • <repo>/.hg/hgrc-not-shared (per-repository)

       • <repo>/.hg/hgrc (per-repository)

       • %USERPROFILE%\.hgrc (per-user)

       • %USERPROFILE%\Mercurial.ini (per-user)

       • %HOME%\.hgrc (per-user)

       • %HOME%\Mercurial.ini (per-user)

       • HKEY_LOCAL_MACHINE\SOFTWARE\Mercurial (per-system)

       • <install-dir>\hgrc.d\*.rc (per-installation)

       • <install-dir>\Mercurial.ini (per-installation)

       • %PROGRAMDATA%\Mercurial\hgrc (per-system)

       • %PROGRAMDATA%\Mercurial\Mercurial.ini (per-system)

       • %PROGRAMDATA%\Mercurial\hgrc.d\*.rc (per-system)

       • <internal>/*.rc (defaults)

       Note   The registry key
              HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Mercurial is used
              when running 32-bit Python on 64-bit Windows.

       On Plan9, the following files are consulted:

       • <repo>/.hg/hgrc-not-shared (per-repository)

       • <repo>/.hg/hgrc (per-repository)

       • $home/lib/hgrc (per-user)

       • <install-root>/lib/mercurial/hgrc (per-installation)

       • <install-root>/lib/mercurial/hgrc.d/*.rc (per-installation)

       • /lib/mercurial/hgrc (per-system)

       • /lib/mercurial/hgrc.d/*.rc (per-system)

       • <internal>/*.rc (defaults)

       Per-repository configuration options only apply in a particular
       repository. This file is not version-controlled, and will not get
       transferred during a "clone" operation. Options in this file
       override options in all other configuration files.

       On Plan 9 and Unix, most of this file will be ignored if it
       doesn't belong to a trusted user or to a trusted group. See hg
       help config.trusted for more details.

       Per-user configuration file(s) are for the user running Mercurial.
       Options in these files apply to all Mercurial commands executed by
       this user in any directory. Options in these files override
       per-system and per-installation options.

       Per-installation configuration files are searched for in the
       directory where Mercurial is installed. <install-root> is the
       parent directory of the hg executable (or symlink) being run.

       For example, if installed in /shared/tools/bin/hg, Mercurial will
       look in /shared/tools/etc/mercurial/hgrc. Options in these files
       apply to all Mercurial commands executed by any user in any
       directory.

       Per-installation configuration files are for the system on which
       Mercurial is running. Options in these files apply to all
       Mercurial commands executed by any user in any directory. Registry
       keys contain PATH-like strings, every part of which must reference
       a Mercurial.ini file or be a directory where *.rc files will be
       read.  Mercurial checks each of these locations in the specified
       order until one or more configuration files are detected.

       Per-system configuration files are for the system on which
       Mercurial is running. Options in these files apply to all
       Mercurial commands executed by any user in any directory. Options
       in these files override per-installation options.

       Mercurial comes with some default configuration. The default
       configuration files are installed with Mercurial and will be
       overwritten on upgrades. Default configuration files should never
       be edited by users or administrators but can be overridden in
       other configuration files. So far the directory only contains
       merge tool configuration but packagers can also put other default
       configuration there.

       On versions 5.7 and later, if share-safe functionality is enabled,
       shares will read config file of share source too.
       <share-source/.hg/hgrc> is read before reading <repo/.hg/hgrc>.

       For configs which should not be shared, <repo/.hg/hgrc-not-shared>
       should be used.

SYNTAX top

       A configuration file consists of sections, led by a [section]
       header and followed by name = value entries (sometimes called
       configuration keys):

       [spam]
       eggs=ham
       green=
          eggs

       Each line contains one entry. If the lines that follow are
       indented, they are treated as continuations of that entry. Leading
       whitespace is removed from values. Empty lines are skipped. Lines
       beginning with # or ; are ignored and may be used to provide
       comments.

       Configuration keys can be set multiple times, in which case
       Mercurial will use the value that was configured last. As an
       example:

       [spam]
       eggs=large
       ham=serrano
       eggs=small

       This would set the configuration key named eggs to small.

       It is also possible to define a section multiple times. A section
       can be redefined on the same and/or on different configuration
       files. For example:

       [foo]
       eggs=large
       ham=serrano
       eggs=small

       [bar]
       eggs=ham
       green=
          eggs

       [foo]
       ham=prosciutto
       eggs=medium
       bread=toasted

       This would set the eggs, ham, and bread configuration keys of the
       foo section to medium, prosciutto, and toasted, respectively. As
       you can see there only thing that matters is the last value that
       was set for each of the configuration keys.

       If a configuration key is set multiple times in different
       configuration files the final value will depend on the order in
       which the different configuration files are read, with settings
       from earlier paths overriding later ones as described on the Files
       section above.

       A line of the form %include file will include file into the
       current configuration file. The inclusion is recursive, which
       means that included files can include other files. Filenames are
       relative to the configuration file in which the %include directive
       is found.  Environment variables and ~user constructs are expanded
       in file. This lets you do something like:

       %include ~/.hgrc.d/$HOST.rc

       to include a different configuration file on each computer you
       use.

       A line with %unset name will remove name from the current section,
       if it has been set previously.

       The values are either free-form text strings, lists of text
       strings, or Boolean values. Boolean values can be set to true
       using any of "1", "yes", "true", or "on" and to false using "0",
       "no", "false", or "off" (all case insensitive).

       List values are separated by whitespace or comma, except when
       values are placed in double quotation marks:

       allow_read = "John Doe, PhD", brian, betty

       Quotation marks can be escaped by prefixing them with a backslash.
       Only quotation marks at the beginning of a word is counted as a
       quotation (e.g., foo"bar baz is the list of foo"bar and baz).

SECTIONS top

This section describes the different sections that may appear in a
Mercurial configuration file, the purpose of each section, its
possible keys, and their possible values.

alias
Defines command aliases.

Aliases allow you to define your own commands in terms of other
commands (or aliases), optionally including arguments. Positional
arguments in the form of $1, $2, etc. in the alias definition are
expanded by Mercurial before execution. Positional arguments not
already used by $N in the definition are put at the end of the
command to be executed.

Alias definitions consist of lines of the form:

<alias> = <command> [<argument>]...

For example, this definition:

latest = log --limit 5

creates a new command latest that shows only the five most recent
changesets. You can define subsequent aliases using earlier ones:

stable5 = latest -b stable

Note It is possible to create aliases with the same names as
existing commands, which will then override the original
definitions. This is almost always a bad idea!

An alias can start with an exclamation point (!) to make it a
shell alias. A shell alias is executed with the shell and will let
you run arbitrary commands. As an example,

echo = !echo $@

will let you do hg echo foo to have foo printed in your terminal.
A better example might be:

purge = !$HG status --no-status --unknown -0 re: | xargs -0 rm -f

which will make hg purge delete all unknown files in the
repository in the same manner as the purge extension.

Positional arguments like $1, $2, etc. in the alias definition
expand to the command arguments. Unmatched arguments are removed.
$0 expands to the alias name and $@ expands to all arguments
separated by a space. "$@" (with quotes) expands to all arguments
quoted individually and separated by a space. These expansions
happen before the command is passed to the shell.

Shell aliases are executed in an environment where $HG expands to
the path of the Mercurial that was used to execute the alias. This
is useful when you want to call further Mercurial commands in a
shell alias, as was done above for the purge alias. In addition,
$HG_ARGS expands to the arguments given to Mercurial. In the hg
echo foo call above, $HG_ARGS would expand to echo foo.

Note Some global configuration options such as -R are processed
before shell aliases and will thus not be passed to
aliases.

annotate
Settings used when displaying file annotations. All values are
Booleans and default to False. See hg help config.diff for related
options for the diff command.

ignorews

Ignore white space when comparing lines.

ignorewseol

Ignore white space at the end of a line when comparing
lines.

ignorewsamount

Ignore changes in the amount of white space.

ignoreblanklines

Ignore changes whose lines are all blank.

auth
Authentication credentials and other authentication-like
configuration for HTTP connections. This section allows you to
store usernames and passwords for use when logging into HTTP
servers. See hg help config.web if you want to configure who can
login to your HTTP server.

The following options apply to all hosts.

cookiefile

Path to a file containing HTTP cookie lines. Cookies
matching a host will be sent automatically.

The file format uses the Mozilla cookies.txt format, which
defines cookies on their own lines. Each line contains 7
fields delimited by the tab character (domain,
is_domain_cookie, path, is_secure, expires, name, value).
For more info, do an Internet search for "Netscape
cookies.txt format."

Note: the cookies parser does not handle port numbers on
domains. You will need to remove ports from the domain for
the cookie to be recognized. This could result in a cookie
being disclosed to an unwanted server.

The cookies file is read-only.

Other options in this section are grouped by name and have the
following format:

where <name> is used to group arguments into authentication
entries. Example:

foo.prefix = hg.intevation.de/mercurial
foo.username = foo
foo.password = bar
foo.schemes = http https

bar.prefix = secure.example.org
bar.key = path/to/file.key
bar.cert = path/to/file.cert
bar.schemes = https

Supported arguments:

prefix

Either * or a URI prefix with or without the scheme part.
The authentication entry with the longest matching prefix
is used (where * matches everything and counts as a match
of length 1). If the prefix doesn't include a scheme, the
match is performed against the URI with its scheme stripped
as well, and the schemes argument, q.v., is then
subsequently consulted.

username

Optional. Username to authenticate with. If not given, and
the remote site requires basic or digest authentication,
the user will be prompted for it. Environment variables are
expanded in the username letting you do foo.username =
$USER. If the URI includes a username, only [auth] entries
with a matching username or without a username will be
considered.

password

Optional. Password to authenticate with. If not given, and
the remote site requires basic or digest authentication,
the user will be prompted for it.

key

Optional. PEM encoded client certificate key file.
Environment variables are expanded in the filename.

cert

Optional. PEM encoded client certificate chain file.
Environment variables are expanded in the filename.

schemes

Optional. Space separated list of URI schemes to use this
authentication entry with. Only used if the prefix doesn't
include a scheme. Supported schemes are http and https.
They will match static-http and static-https respectively,
as well. (default: https)

If no suitable authentication entry is found, the user is prompted
for credentials as usual if required by the remote.

cmdserver
Controls command server settings. (ADVANCED)

message-encodings

List of encodings for the m (message) channel. The first
encoding supported by the server will be selected and
advertised in the hello message. This is useful only when
ui.message-output is set to channel. Supported encodings
are cbor.

shutdown-on-interrupt

If set to false, the server's main loop will continue
running after SIGINT received. runcommand requests can
still be interrupted by SIGINT. Close the write end of the
pipe to shut down the server process gracefully. (default:
True)

color
Configure the Mercurial color mode. For details about how to
define your custom effect and style see hg help color.

mode

String: control the method used to output color. One of
auto, ansi, win32, terminfo or debug. In auto mode,
Mercurial will use ANSI mode by default (or win32 mode
prior to Windows 10) if it detects a terminal. Any invalid
value will disable color.

pagermode

String: optional override of color.mode used with pager.

On some systems, terminfo mode may cause problems when
using color with less -R as a pager program. less with the
-R option will only display ECMA-48 color codes, and
terminfo mode may sometimes emit codes that less doesn't
understand. You can work around this by either using ansi
mode (or auto mode), or by using less -r (which will pass
through all terminal control codes, not just color control
codes).

On some systems (such as MSYS in Windows), the terminal may
support a different color mode than the pager program.

commands
commit.post-status

Show status of files in the working directory after
successful commit. (default: False)

merge.require-rev

Require that the revision to merge the current commit with
be specified on the command line. If this is enabled and a
revision is not specified, the command aborts. (default:
False)

push.require-revs

Require revisions to push be specified using one or more
mechanisms such as specifying them positionally on the
command line, using -r, -b, and/or -B on the command line,
or using paths.<path>:pushrev in the configuration. If this
is enabled and revisions are not specified, the command
aborts. (default: False)

resolve.confirm

Confirm before performing action if no filename is passed.
(default: False)

resolve.explicit-re-merge

Require uses of hg resolve to specify which action it
should perform, instead of re-merging files by default.
(default: False)

resolve.mark-check

Determines what level of checking hg resolve --mark will
perform before marking files as resolved. Valid values are
none`, ``warn, and abort. warn will output a warning
listing the file(s) that still have conflict markers in
them, but will still mark everything resolved. abort will
output the same warning but will not mark things as
resolved. If --all is passed and this is set to abort,
only a warning will be shown (an error will not be raised).
(default: none)

status.relative

Make paths in hg status output relative to the current
directory. (default: False)

status.terse

Default value for the --terse flag, which condenses status
output. (default: empty)

update.check

Determines what level of checking hg update will perform
before moving to a destination revision. Valid values are
abort, none, linear, and noconflict.

• abort always fails if the working directory has
uncommitted changes.

• none performs no checking, and may result in a merge with
uncommitted changes.

• linear allows any update as long as it follows a straight
line in the revision history, and may trigger a merge
with uncommitted changes.

• noconflict will allow any update which would not trigger
a merge with uncommitted changes, if any are present.

(default: linear)

update.requiredest

Require that the user pass a destination when running hg
update. For example, hg update .:: will be allowed, but a
plain hg update will be disallowed. (default: False)

committemplate
changeset

String: configuration in this section is used as the
template to customize the text shown in the editor when
committing.

In addition to pre-defined template keywords, commit log specific
one below can be used for customization:

extramsg

String: Extra message (typically 'Leave message empty to
abort commit.'). This may be changed by some commands or
extensions.

For example, the template configuration below shows as same text
as one shown by default:

[committemplate]
changeset = {desc}\n\n
HG: Enter commit message. Lines beginning with 'HG:' are removed.
HG: {extramsg}
HG: --
HG: user: {author}\n{ifeq(p2rev, "-1", "",
"HG: branch merge\n")
}HG: branch '{branch}'\n{if(activebookmark,
"HG: bookmark '{activebookmark}'\n") }{subrepos %
"HG: subrepo {subrepo}\n" }{file_adds %
"HG: added {file}\n" }{file_mods %
"HG: changed {file}\n" }{file_dels %
"HG: removed {file}\n" }{if(files, "",
"HG: no files changed\n")}

diff()

String: show the diff (see hg help templates for detail)

Sometimes it is helpful to show the diff of the changeset in the
editor without having to prefix 'HG: ' to each line so that
highlighting works correctly. For this, Mercurial provides a
special string which will ignore everything below it:

HG: ------------------------ >8 ------------------------

For example, the template configuration below will show the diff
below the extra message:

[committemplate]
changeset = {desc}\n\n
HG: Enter commit message. Lines beginning with 'HG:' are removed.
HG: {extramsg}
HG: ------------------------ >8 ------------------------
HG: Do not touch the line above.
HG: Everything below will be removed.
{diff()}

Note For some problematic encodings (see hg help win32mbcs for
detail), this customization should be configured carefully,
to avoid showing broken characters.

For example, if a multibyte character ending with backslash
(0x5c) is followed by the ASCII character 'n' in the
customized template, the sequence of backslash and 'n' is
treated as line-feed unexpectedly (and the multibyte
character is broken, too).

Customized template is used for commands below (--edit may be
required):

• hg backout

• hg commit

• hg fetch (for merge commit only)

• hg graft

• hg histedit

• hg import

• hg qfold, hg qnew and hg qrefresh

• hg rebase

• hg shelve

• hg sign

• hg tag

• hg transplant

Configuring items below instead of changeset allows showing
customized message only for specific actions, or showing different
messages for each action.

• changeset.backout for hg backout

• changeset.commit.amend.merge for hg commit --amend on merges

• changeset.commit.amend.normal for hg commit --amend on other

• changeset.commit.normal.merge for hg commit on merges

• changeset.commit.normal.normal for hg commit on other

• changeset.fetch for hg fetch (impling merge commit)

• changeset.gpg.sign for hg sign

• changeset.graft for hg graft

• changeset.histedit.edit for edit of hg histedit

• changeset.histedit.fold for fold of hg histedit

• changeset.histedit.mess for mess of hg histedit

• changeset.histedit.pick for pick of hg histedit

• changeset.import.bypass for hg import --bypass

• changeset.import.normal.merge for hg import on merges

• changeset.import.normal.normal for hg import on other

• changeset.mq.qnew for hg qnew

• changeset.mq.qfold for hg qfold

• changeset.mq.qrefresh for hg qrefresh

• changeset.rebase.collapse for hg rebase --collapse

• changeset.rebase.merge for hg rebase on merges

• changeset.rebase.normal for hg rebase on other

• changeset.shelve.shelve for hg shelve

• changeset.tag.add for hg tag without --remove

• changeset.tag.remove for hg tag --remove

• changeset.transplant.merge for hg transplant on merges

• changeset.transplant.normal for hg transplant on other

These dot-separated lists of names are treated as hierarchical
ones. For example, changeset.tag.remove customizes the commit
message only for hg tag --remove, but changeset.tag customizes the
commit message for hg tag regardless of --remove option.

When the external editor is invoked for a commit, the
corresponding dot-separated list of names without the changeset.
prefix (e.g. commit.normal.normal) is in the HGEDITFORM
environment variable.

In this section, items other than changeset can be referred from
others. For example, the configuration to list committed files up
below can be referred as {listupfiles}:

[committemplate]
listupfiles = {file_adds %
"HG: added {file}\n" }{file_mods %
"HG: changed {file}\n" }{file_dels %
"HG: removed {file}\n" }{if(files, "",
"HG: no files changed\n")}

decode/encode
Filters for transforming files on checkout/checkin. This would
typically be used for newline processing or other
localization/canonicalization of files.

Filters consist of a filter pattern followed by a filter command.
Filter patterns are globs by default, rooted at the repository
root. For example, to match any file ending in .txt in the root
directory only, use the pattern *.txt. To match any file ending in
.c anywhere in the repository, use the pattern **.c. For each
file only the first matching filter applies.

The filter command can start with a specifier, either pipe: or
tempfile:. If no specifier is given, pipe: is used by default.

A pipe: command must accept data on stdin and return the
transformed data on stdout.

Pipe example:

[encode]
# uncompress gzip files on checkin to improve delta compression
# note: not necessarily a good idea, just an example
*.gz = pipe: gunzip

[decode]
# recompress gzip files when writing them to the working dir (we
# can safely omit "pipe:", because it's the default)
*.gz = gzip

A tempfile: command is a template. The string INFILE is replaced
with the name of a temporary file that contains the data to be
filtered by the command. The string OUTFILE is replaced with the
name of an empty temporary file, where the filtered data must be
written by the command.

Note The tempfile mechanism is recommended for Windows systems,
where the standard shell I/O redirection operators often
have strange effects and may corrupt the contents of your
files.

This filter mechanism is used internally by the eol extension to
translate line ending characters between Windows (CRLF) and Unix
(LF) format. We suggest you use the eol extension for convenience.

defaults
(defaults are deprecated. Don't use them. Use aliases instead.)

Use the [defaults] section to define command defaults, i.e. the
default options/arguments to pass to the specified commands.

The following example makes hg log run in verbose mode, and hg
status show only the modified files, by default:

[defaults]
log = -v
status = -m

The actual commands, instead of their aliases, must be used when
defining command defaults. The command defaults will also be
applied to the aliases of the commands defined.

diff
Settings used when displaying diffs. Everything except for unified
is a Boolean and defaults to False. See hg help config.annotate
for related options for the annotate command.

git

Use git extended diff format.

nobinary

Omit git binary patches.

nodates

Don't include dates in diff headers.

noprefix

Omit 'a/' and 'b/' prefixes from filenames. Ignored in
plain mode.

showfunc

Show which function each change is in.

ignorews

Ignore white space when comparing lines.

ignorewsamount

Ignore changes in the amount of white space.

ignoreblanklines

Ignore changes whose lines are all blank.

unified

Number of lines of context to show.

word-diff

Highlight changed words.

email
Settings for extensions that send email messages.

from

Optional. Email address to use in "From" header and SMTP
envelope of outgoing messages.

Optional. Comma-separated list of recipients' email
addresses.

Optional. Comma-separated list of carbon copy recipients'
email addresses.

bcc

Optional. Comma-separated list of blind carbon copy
recipients' email addresses.

method

Optional. Method to use to send email messages. If value is
smtp (default), use SMTP (see the [smtp] section for
configuration). Otherwise, use as name of program to run
that acts like sendmail (takes -f option for sender, list
of recipients on command line, message on stdin). Normally,
setting this to sendmail or /usr/sbin/sendmail is enough to
use sendmail to send messages.

charsets

Optional. Comma-separated list of character sets considered
convenient for recipients. Addresses, headers, and parts
not containing patches of outgoing messages will be encoded
in the first character set to which conversion from local
encoding ($HGENCODING, ui.fallbackencoding) succeeds. If
correct conversion fails, the text in question is sent as
is. (default: '')

Order of outgoing email character sets:

1. us-ascii: always first, regardless of settings

2. email.charsets: in order given by user

3. ui.fallbackencoding: if not in email.charsets

4. $HGENCODING: if not in email.charsets

5. utf-8: always last, regardless of settings

Email example:

[email]
from = Joseph User <[email protected]>
method = /usr/sbin/sendmail
# charsets for western Europeans
# us-ascii, utf-8 omitted, as they are tried first and last
charsets = iso-8859-1, iso-8859-15, windows-1252

extensions
Mercurial has an extension mechanism for adding new features. To
enable an extension, create an entry for it in this section.

If you know that the extension is already in Python's search path,
you can give the name of the module, followed by =, with nothing
after the =.

Otherwise, give a name that you choose, followed by =, followed by
the path to the .py file (including the file name extension) that
defines the extension.

To explicitly disable an extension that is enabled in an hgrc of
broader scope, prepend its path with !, as in foo = !/ext/path or
foo = ! when path is not supplied.

Example for ~/.hgrc:

[extensions]
# (the churn extension will get loaded from Mercurial's path)
churn =
# (this extension will get loaded from the file specified)
myfeature = ~/.hgext/myfeature.py

If an extension fails to load, a warning will be issued, and
Mercurial will proceed. To enforce that an extension must be
loaded, one can set the required suboption in the config:

[extensions]
myfeature = ~/.hgext/myfeature.py
myfeature:required = yes

To debug extension loading issue, one can add --traceback to their
mercurial invocation.

A default setting can we set using the special * extension key:

[extensions]
*:required = yes
myfeature = ~/.hgext/myfeature.py
rebase=

format
Configuration that controls the repository format. Newer format
options are more powerful, but incompatible with some older
versions of Mercurial. Format options are considered at repository
initialization only. You need to make a new clone for config
changes to be taken into account.

For more details about repository format and version
compatibility, see
https://www.mercurial-scm.org/wiki/MissingRequirement

usegeneraldelta

Enable or disable the "generaldelta" repository format
which improves repository compression by allowing "revlog"
to store deltas against arbitrary revisions instead of the
previously stored one. This provides significant
improvement for repositories with branches.

Repositories with this on-disk format require Mercurial
version 1.9.

Enabled by default.

dotencode

Enable or disable the "dotencode" repository format which
enhances the "fncache" repository format (which has to be
enabled to use dotencode) to avoid issues with filenames
starting with "._" on Mac OS X and spaces on Windows.

Repositories with this on-disk format require Mercurial
version 1.7.

Enabled by default.

usefncache

Enable or disable the "fncache" repository format which
enhances the "store" repository format (which has to be
enabled to use fncache) to allow longer filenames and
avoids using Windows reserved names, e.g. "nul".

Repositories with this on-disk format require Mercurial
version 1.1.

Enabled by default.

use-dirstate-v2

Enable or disable the experimental "dirstate-v2" feature.
The dirstate functionality is shared by all commands
interacting with the working copy. The new version is more
robust, faster and stores more information.

The performance-improving version of this feature is
currently only implemented in Rust (see hg help rust), so
people not using a version of Mercurial compiled with the
Rust parts might actually suffer some slowdown. For this
reason, such versions will by default refuse to access
repositories with "dirstate-v2" enabled.

This behavior can be adjusted via configuration: check hg
help config.storage.dirstate-v2.slow-path for details.

Repositories with this on-disk format require Mercurial 6.0
or above.

By default this format variant is disabled if the fast
implementation is not available, and enabled by default if
the fast implementation is available.

To accomodate installations of Mercurial without the fast
implementation, you can downgrade your repository. To do so
run the following command:

$ hg debugupgraderepo
--run --config format.use-dirstate-v2=False --config
storage.dirstate-v2.slow-path=allow

For a more comprehensive guide, see hg help
internals.dirstate-v2.

use-dirstate-v2.automatic-upgrade-of-mismatching-repositories

When enabled, an automatic upgrade will be triggered when a
repository format does not match its use-dirstate-v2
config.

This is an advanced behavior that most users will not need.
We recommend you don't use this unless you are a seasoned
administrator of a Mercurial install base.

Automatic upgrade means that any process accessing the
repository will upgrade the repository format to use
dirstate-v2. This only triggers if a change is needed. This
also applies to operations that would have been read-only
(like hg status).

If the repository cannot be locked, the automatic-upgrade
operation will be skipped. The next operation will attempt
it again.

This configuration will apply for moves in any direction,
either adding the dirstate-v2 format if
format.use-dirstate-v2=yes or removing the dirstate-v2
requirement if format.use-dirstate-v2=no. So we recommend
setting both this value and format.use-dirstate-v2 at the
same time.

use-dirstate-tracked-hint

Enable or disable the writing of "tracked key" file
alongside the dirstate. (default to disabled)

That "tracked-hint" can help external automations to detect
changes to the set of tracked files. (i.e the result of hg
files or hg status -macd)

The tracked-hint is written in a new
.hg/dirstate-tracked-hint. That file contains two lines: -
the first line is the file version (currently: 1), - the
second line contains the "tracked-hint". That file is
written right after the dirstate is written.

The tracked-hint changes whenever the set of file tracked
in the dirstate changes. The general idea is: - if the hint
is identical, the set of tracked file SHOULD be identical,
- if the hint is different, the set of tracked file MIGHT
be different.

The "hint is identical" case uses SHOULD as the dirstate
and the hint file are two distinct files and therefore that
cannot be read or written to in an atomic way. If the key
is identical, nothing garantees that the dirstate is not
updated right after the hint file. This is considered a
negligible limitation for the intended usecase. It is
actually possible to prevent this race by taking the
repository lock during read operations.

They are two "ways" to use this feature:

1) monitoring changes to the .hg/dirstate-tracked-hint, if
the file changes, the tracked set might have changed.

2. storing the value and comparing it to a later value.

use-dirstate-tracked-hint.automatic-upgrade-of-mismatching-repositories

When enabled, an automatic upgrade will be triggered when a
repository format does not match its
use-dirstate-tracked-hint config.

This is an advanced behavior that most users will not need.
We recommend you don't use this unless you are a seasoned
administrator of a Mercurial install base.

Automatic upgrade means that any process accessing the
repository will upgrade the repository format to use
dirstate-tracked-hint. This only triggers if a change is
needed. This also applies to operations that would have
been read-only (like hg status).

If the repository cannot be locked, the automatic-upgrade
operation will be skipped. The next operation will attempt
it again.

This configuration will apply for moves in any direction,
either adding the dirstate-tracked-hint format if
format.use-dirstate-tracked-hint=yes or removing the
dirstate-tracked-hint requirement if
format.use-dirstate-tracked-hint=no. So we recommend
setting both this value and
format.use-dirstate-tracked-hint at the same time.

use-persistent-nodemap

Enable or disable the "persistent-nodemap" feature which
improves performance if the Rust extensions are available.

The "persistent-nodemap" persist the "node -> rev" on disk
removing the need to dynamically build that mapping for
each Mercurial invocation. This significantly reduces the
startup cost of various local and server-side operation for
larger repositories.

This behavior can be adjusted via configuration: check hg
help config.storage.revlog.persistent-nodemap.slow-path for
details.

Repositories with this on-disk format require Mercurial 5.4
or above.

By default this format variant is disabled if the fast
implementation is not available, and enabled by default if
the fast implementation is available.

To accomodate installations of Mercurial without the fast
implementation, you can downgrade your repository. To do so
run the following command:

$ hg debugupgraderepo
--run --config format.use-persistent-nodemap=False
--config
storage.revlog.persistent-nodemap.slow-path=allow

use-share-safe

Enforce "safe" behaviors for all "shares" that access this
repository.

With this feature, "shares" using this repository as a
source will:

• read the source repository's configuration
(<source>/.hg/hgrc).

• read and use the source repository's "requirements"
(except the working copy specific one).

Without this feature, "shares" using this repository as a
source will:

• keep tracking the repository "requirements" in the share
only, ignoring the source "requirements", possibly
diverging from them.

• ignore source repository config. This can create
problems, like silently ignoring important hooks.

Beware that existing shares will not be
upgraded/downgraded, and by default, Mercurial will refuse
to interact with them until the mismatch is resolved. See
hg help config.share.safe-mismatch.source-safe and hg help
config.share.safe-mismatch.source-not-safe for details.

Introduced in Mercurial 5.7.

Enabled by default in Mercurial 6.1.

use-share-safe.automatic-upgrade-of-mismatching-repositories

When enabled, an automatic upgrade will be triggered when a
repository format does not match its use-share-safe config.

This is an advanced behavior that most users will not need.
We recommend you don't use this unless you are a seasoned
administrator of a Mercurial install base.

Automatic upgrade means that any process accessing the
repository will upgrade the repository format to use
share-safe. This only triggers if a change is needed. This
also applies to operation that would have been read-only
(like hg status).

If the repository cannot be locked, the automatic-upgrade
operation will be skipped. The next operation will attempt
it again.

This configuration will apply for moves in any direction,
either adding the share-safe format if
format.use-share-safe=yes or removing the share-safe
requirement if format.use-share-safe=no. So we recommend
setting both this value and format.use-share-safe at the
same time.

usestore

Enable or disable the "store" repository format which
improves compatibility with systems that fold case or
otherwise mangle filenames. Disabling this option will
allow you to store longer filenames in some situations at
the expense of compatibility.

Repositories with this on-disk format require Mercurial
version 0.9.4.

Enabled by default.

sparse-revlog

Enable or disable the sparse-revlog delta strategy. This
format improves delta re-use inside revlog. For very
branchy repositories, it results in a smaller store. For
repositories with many revisions, it also helps performance
(by using shortened delta chains.)

Repositories with this on-disk format require Mercurial
version 4.7

Enabled by default.

revlog-compression

Compression algorithm used by revlog. Supported values are
zlib and zstd. The zlib engine is the historical default of
Mercurial. zstd is a newer format that is usually a net win
over zlib, operating faster at better compression rates.
Use zstd to reduce CPU usage. Multiple values can be
specified, the first available one will be used.

On some systems, the Mercurial installation may lack zstd
support.

Default is zstd if available, zlib otherwise.

bookmarks-in-store

Store bookmarks in .hg/store/. This means that bookmarks
are shared when using hg share regardless of the -B option.

Repositories with this on-disk format require Mercurial
version 5.1.

Disabled by default.

graph
Web graph view configuration. This section let you change graph
elements display properties by branches, for instance to make the
default branch stand out.

Each line has the following format:

where <branch> is the name of the branch being customized.
Example:

[graph]
# 2px width
default.width = 2
# red color
default.color = FF0000

Supported arguments:

width

Set branch edges width in pixels.

color

Set branch edges color in hexadecimal RGB notation.

hooks
Commands or Python functions that get automatically executed by
various actions such as starting or finishing a commit. Multiple
hooks can be run for the same action by appending a suffix to the
action. Overriding a site-wide hook can be done by changing its
value or setting it to an empty string. Hooks can be prioritized
by adding a prefix of priority. to the hook name on a new line and
setting the priority. The default priority is 0.

Example .hg/hgrc:

[hooks]
# update working directory after adding changesets
changegroup.update = hg update
# do not use the site-wide hook
incoming =
incoming.email = /my/email/hook
incoming.autobuild = /my/build/hook
# force autobuild hook to run before other incoming hooks
priority.incoming.autobuild = 1
### control HGPLAIN setting when running autobuild hook
# HGPLAIN always set (default from Mercurial 5.7)
incoming.autobuild:run-with-plain = yes
# HGPLAIN never set
incoming.autobuild:run-with-plain = no
# HGPLAIN inherited from environment (default before Mercurial 5.7)
incoming.autobuild:run-with-plain = auto

Most hooks are run with environment variables set that give useful
additional information. For each hook below, the environment
variables it is passed are listed with names in the form $HG_foo.
The $HG_HOOKTYPE and $HG_HOOKNAME variables are set for all hooks.
They contain the type of hook which triggered the run and the full
name of the hook in the config, respectively. In the example
above, this will be $HG_HOOKTYPE=incoming and
$HG_HOOKNAME=incoming.email.

Some basic Unix syntax can be enabled for portability, including
$VAR and ${VAR} style variables. A ~ followed by \ or / will be
expanded to %USERPROFILE% to simulate a subset of tilde expansion
on Unix. To use a literal $ or ~, it must be escaped with a back
slash or inside of a strong quote. Strong quotes will be replaced
by double quotes after processing.

This feature is enabled by adding a prefix of tonative. to the
hook name on a new line, and setting it to True. For example:

[hooks]
incoming.autobuild = /my/build/hook
# enable translation to cmd.exe syntax for autobuild hook
tonative.incoming.autobuild = True

changegroup

Run after a changegroup has been added via push, pull or
unbundle. The ID of the first new changeset is in $HG_NODE
and last is in $HG_NODE_LAST. The URL from which changes
came is in $HG_URL.

commit

Run after a changeset has been created in the local
repository. The ID of the newly created changeset is in
$HG_NODE. Parent changeset IDs are in $HG_PARENT1 and
$HG_PARENT2.

incoming

Run after a changeset has been pulled, pushed, or unbundled
into the local repository. The ID of the newly arrived
changeset is in $HG_NODE. The URL that was source of the
changes is in $HG_URL.

outgoing

Run after sending changes from the local repository to
another. The ID of first changeset sent is in $HG_NODE. The
source of operation is in $HG_SOURCE. Also see hg help
config.hooks.preoutgoing.

post-<command>

Run after successful invocations of the associated command.
The contents of the command line are passed as $HG_ARGS and
the result code in $HG_RESULT. Parsed command line
arguments are passed as $HG_PATS and $HG_OPTS. These
contain string representations of the python data
internally passed to <command>. $HG_OPTS is a dictionary of
options (with unspecified options set to their defaults).
$HG_PATS is a list of arguments. Hook failure is ignored.

fail-<command>

Run after a failed invocation of an associated command. The
contents of the command line are passed as $HG_ARGS. Parsed
command line arguments are passed as $HG_PATS and $HG_OPTS.
These contain string representations of the python data
internally passed to <command>. $HG_OPTS is a dictionary of
options (with unspecified options set to their defaults).
$HG_PATS is a list of arguments. Hook failure is ignored.

pre-<command>

Run before executing the associated command. The contents
of the command line are passed as $HG_ARGS. Parsed command
line arguments are passed as $HG_PATS and $HG_OPTS. These
contain string representations of the data internally
passed to <command>. $HG_OPTS is a dictionary of options
(with unspecified options set to their defaults). $HG_PATS
is a list of arguments. If the hook returns failure, the
command doesn't execute and Mercurial returns the failure
code.

prechangegroup

Run before a changegroup is added via push, pull or
unbundle. Exit status 0 allows the changegroup to proceed.
A non-zero status will cause the push, pull or unbundle to
fail. The URL from which changes will come is in $HG_URL.

precommit

Run before starting a local commit. Exit status 0 allows
the commit to proceed. A non-zero status will cause the
commit to fail. Parent changeset IDs are in $HG_PARENT1
and $HG_PARENT2.

prelistkeys

Run before listing pushkeys (like bookmarks) in the
repository. A non-zero status will cause failure. The key
namespace is in $HG_NAMESPACE.

preoutgoing

Run before collecting changes to send from the local
repository to another. A non-zero status will cause
failure. This lets you prevent pull over HTTP or SSH. It
can also prevent propagating commits (via local pull, push
(outbound) or bundle commands), but not completely, since
you can just copy files instead. The source of operation is
in $HG_SOURCE. If "serve", the operation is happening on
behalf of a remote SSH or HTTP repository. If "push",
"pull" or "bundle", the operation is happening on behalf of
a repository on same system.

prepushkey

Run before a pushkey (like a bookmark) is added to the
repository. A non-zero status will cause the key to be
rejected. The key namespace is in $HG_NAMESPACE, the key is
in $HG_KEY, the old value (if any) is in $HG_OLD, and the
new value is in $HG_NEW.

pretag

Run before creating a tag. Exit status 0 allows the tag to
be created. A non-zero status will cause the tag to fail.
The ID of the changeset to tag is in $HG_NODE. The name of
tag is in $HG_TAG. The tag is local if $HG_LOCAL=1, or in
the repository if $HG_LOCAL=0.

pretxnopen

Run before any new repository transaction is open. The
reason for the transaction will be in $HG_TXNNAME, and a
unique identifier for the transaction will be in $HG_TXNID.
A non-zero status will prevent the transaction from being
opened.

pretxnclose

Run right before the transaction is actually finalized. Any
repository change will be visible to the hook program. This
lets you validate the transaction content or change it.
Exit status 0 allows the commit to proceed. A non-zero
status will cause the transaction to be rolled back. The
reason for the transaction opening will be in $HG_TXNNAME,
and a unique identifier for the transaction will be in
$HG_TXNID. The rest of the available data will vary
according the transaction type. Changes unbundled to the
repository will add $HG_URL and $HG_SOURCE. New changesets
will add $HG_NODE (the ID of the first added changeset),
$HG_NODE_LAST (the ID of the last added changeset).
Bookmark and phase changes will set $HG_BOOKMARK_MOVED and
$HG_PHASES_MOVED to 1 respectively. The number of new
obsmarkers, if any, will be in $HG_NEW_OBSMARKERS, etc.

pretxnclose-bookmark

Run right before a bookmark change is actually finalized.
Any repository change will be visible to the hook program.
This lets you validate the transaction content or change
it. Exit status 0 allows the commit to proceed. A non-zero
status will cause the transaction to be rolled back. The
name of the bookmark will be available in $HG_BOOKMARK, the
new bookmark location will be available in $HG_NODE while
the previous location will be available in $HG_OLDNODE. In
case of a bookmark creation $HG_OLDNODE will be empty. In
case of deletion $HG_NODE will be empty. In addition, the
reason for the transaction opening will be in $HG_TXNNAME,
and a unique identifier for the transaction will be in
$HG_TXNID.

pretxnclose-phase

Run right before a phase change is actually finalized. Any
repository change will be visible to the hook program. This
lets you validate the transaction content or change it.
Exit status 0 allows the commit to proceed. A non-zero
status will cause the transaction to be rolled back. The
hook is called multiple times, once for each revision
affected by a phase change. The affected node is available
in $HG_NODE, the phase in $HG_PHASE while the previous
$HG_OLDPHASE. In case of new node, $HG_OLDPHASE will be
empty. In addition, the reason for the transaction opening
will be in $HG_TXNNAME, and a unique identifier for the
transaction will be in $HG_TXNID. The hook is also run for
newly added revisions. In this case the $HG_OLDPHASE entry
will be empty.

txnclose

Run after any repository transaction has been committed. At
this point, the transaction can no longer be rolled back.
The hook will run after the lock is released. See hg help
config.hooks.pretxnclose for details about available
variables.

txnclose-bookmark

Run after any bookmark change has been committed. At this
point, the transaction can no longer be rolled back. The
hook will run after the lock is released. See hg help
config.hooks.pretxnclose-bookmark for details about
available variables.

txnclose-phase

Run after any phase change has been committed. At this
point, the transaction can no longer be rolled back. The
hook will run after the lock is released. See hg help
config.hooks.pretxnclose-phase for details about available
variables.

txnabort

Run when a transaction is aborted. See hg help
config.hooks.pretxnclose for details about available
variables.

pretxnchangegroup

Run after a changegroup has been added via push, pull or
unbundle, but before the transaction has been committed.
The changegroup is visible to the hook program. This allows
validation of incoming changes before accepting them. The
ID of the first new changeset is in $HG_NODE and last is in
$HG_NODE_LAST. Exit status 0 allows the transaction to
commit. A non-zero status will cause the transaction to be
rolled back, and the push, pull or unbundle will fail. The
URL that was the source of changes is in $HG_URL.

pretxncommit

Run after a changeset has been created, but before the
transaction is committed. The changeset is visible to the
hook program. This allows validation of the commit message
and changes. Exit status 0 allows the commit to proceed. A
non-zero status will cause the transaction to be rolled
back. The ID of the new changeset is in $HG_NODE. The
parent changeset IDs are in $HG_PARENT1 and $HG_PARENT2.

preupdate

Run before updating the working directory. Exit status 0
allows the update to proceed. A non-zero status will
prevent the update. The changeset ID of first new parent
is in $HG_PARENT1. If updating to a merge, the ID of second
new parent is in $HG_PARENT2.

listkeys

Run after listing pushkeys (like bookmarks) in the
repository. The key namespace is in $HG_NAMESPACE.
$HG_VALUES is a dictionary containing the keys and values.

pushkey

Run after a pushkey (like a bookmark) is added to the
repository. The key namespace is in $HG_NAMESPACE, the key
is in $HG_KEY, the old value (if any) is in $HG_OLD, and
the new value is in $HG_NEW.

tag

Run after a tag is created. The ID of the tagged changeset
is in $HG_NODE. The name of tag is in $HG_TAG. The tag is
local if $HG_LOCAL=1, or in the repository if $HG_LOCAL=0.

update

Run after updating the working directory. The changeset ID
of first new parent is in $HG_PARENT1. If updating to a
merge, the ID of second new parent is in $HG_PARENT2. If
the update succeeded, $HG_ERROR=0. If the update failed
(e.g. because conflicts were not resolved), $HG_ERROR=1.

Note It is generally better to use standard hooks rather than
the generic pre- and post- command hooks, as they are
guaranteed to be called in the appropriate contexts for
influencing transactions. Also, hooks like "commit" will
be called in all contexts that generate a commit (e.g. tag)
and not just the commit command.

Note Environment variables with empty values may not be passed
to hooks on platforms such as Windows. As an example,
$HG_PARENT2 will have an empty value under Unix-like
platforms for non-merge changesets, while it will not be
available at all under Windows.

The syntax for Python hooks is as follows:

hookname = python:modulename.submodule.callable
hookname = python:/path/to/python/module.py:callable

Python hooks are run within the Mercurial process. Each hook is
called with at least three keyword arguments: a ui object (keyword
ui), a repository object (keyword repo), and a hooktype keyword
that tells what kind of hook is used. Arguments listed as
environment variables above are passed as keyword arguments, with
no HG_ prefix, and names in lower case.

If a Python hook returns a "true" value or raises an exception,
this is treated as a failure.

hostfingerprints
(Deprecated. Use [hostsecurity]'s fingerprints options instead.)

Fingerprints of the certificates of known HTTPS servers.

A HTTPS connection to a server with a fingerprint configured here
will only succeed if the servers certificate matches the
fingerprint. This is very similar to how ssh known hosts works.

The fingerprint is the SHA-1 hash value of the DER encoded
certificate. Multiple values can be specified (separated by
spaces or commas). This can be used to define both old and new
fingerprints while a host transitions to a new certificate.

The CA chain and web.cacerts is not used for servers with a
fingerprint.

For example:

[hostfingerprints]
hg.intevation.de = fc:e2:8d:d9:51:cd:cb:c1:4d:18:6b:b7:44:8d:49:72:57:e6:cd:33
hg.intevation.org = fc:e2:8d:d9:51:cd:cb:c1:4d:18:6b:b7:44:8d:49:72:57:e6:cd:33

hostsecurity
Used to specify global and per-host security settings for
connecting to other machines.

The following options control default behavior for all hosts.

ciphers

Defines the cryptographic ciphers to use for connections.

Value must be a valid OpenSSL Cipher List Format as
documented at
https://www.openssl.org/docs/manmaster/apps/ciphers.html#CIPHER-LIST-FORMAT.

This setting is for advanced users only. Setting to
incorrect values can significantly lower connection
security or decrease performance. You have been warned.

This option requires Python 2.7.

minimumprotocol

Defines the minimum channel encryption protocol to use.

By default, the highest version of TLS supported by both
client and server is used.

Allowed values are: tls1.0, tls1.1, tls1.2.

When running on an old Python version, only tls1.0 is
allowed since old versions of Python only support up to TLS
1.0.

When running a Python that supports modern TLS versions,
the default is tls1.1. tls1.0 can still be used to allow
TLS 1.0. However, this weakens security and should only be
used as a feature of last resort if a server does not
support TLS 1.1+.

Options in the [hostsecurity] section can have the form
hostname:setting. This allows multiple settings to be defined on a
per-host basis.

The following per-host settings can be defined.

ciphers

This behaves like ciphers as described above except it only
applies to the host on which it is defined.

fingerprints

A list of hashes of the DER encoded peer/remote
certificate. Values have the form algorithm:fingerprint.
e.g.
sha256:c3ab8ff13720e8ad9047dd39466b3c8974e592c2fa383d4a3960714caef0c4f2.
In addition, colons (:) can appear in the fingerprint part.

The following algorithms/prefixes are supported: sha1,
sha256, sha512.

Use of sha256 or sha512 is preferred.

If a fingerprint is specified, the CA chain is not
validated for this host and Mercurial will require the
remote certificate to match one of the fingerprints
specified. This means if the server updates its
certificate, Mercurial will abort until a new fingerprint
is defined. This can provide stronger security than
traditional CA-based validation at the expense of
convenience.

This option takes precedence over verifycertsfile.

minimumprotocol

This behaves like minimumprotocol as described above except
it only applies to the host on which it is defined.

verifycertsfile

Path to file a containing a list of PEM encoded
certificates used to verify the server certificate.
Environment variables and ~user constructs are expanded in
the filename.

The server certificate or the certificate's certificate
authority (CA) must match a certificate from this file or
certificate verification will fail and connections to the
server will be refused.

If defined, only certificates provided by this file will be
used: web.cacerts and any system/default certificates will
not be used.

This option has no effect if the per-host fingerprints
option is set.

The format of the file is as follows:

-----BEGIN CERTIFICATE-----
... (certificate in base64 PEM encoding) ...
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
... (certificate in base64 PEM encoding) ...
-----END CERTIFICATE-----

For example:

[hostsecurity]
hg.example.com:fingerprints = sha256:c3ab8ff13720e8ad9047dd39466b3c8974e592c2fa383d4a3960714caef0c4f2
hg2.example.com:fingerprints = sha1:914f1aff87249c09b6859b88b1906d30756491ca, sha1:fc:e2:8d:d9:51:cd:cb:c1:4d:18:6b:b7:44:8d:49:72:57:e6:cd:33
hg3.example.com:fingerprints = sha256:9a:b0:dc:e2:75:ad:8a:b7:84:58:e5:1f:07:32:f1:87:e6:bd:24:22:af:b7:ce:8e:9c:b4:10:cf:b9:f4:0e:d2
foo.example.com:verifycertsfile = /etc/ssl/trusted-ca-certs.pem

To change the default minimum protocol version to TLS 1.2 but to
allow TLS 1.1 when connecting to hg.example.com:

[hostsecurity]
minimumprotocol = tls1.2
hg.example.com:minimumprotocol = tls1.1

http_proxy
Used to access web-based Mercurial repositories through a HTTP
proxy.

host

Host name and (optional) port of the proxy server, for
example "myproxy:8000".

Optional. Comma-separated list of host names that should
bypass the proxy.

passwd

Optional. Password to authenticate with at the proxy
server.

user

Optional. User name to authenticate with at the proxy
server.

always

Optional. Always use the proxy, even for localhost and any
entries in http_proxy.no. (default: False)

http
Used to configure access to Mercurial repositories via HTTP.

timeout

If set, blocking operations will timeout after that many
seconds. (default: None)

merge
This section specifies behavior during merges and updates.

checkignored

Controls behavior when an ignored file on disk has the same
name as a tracked file in the changeset being merged or
updated to, and has different contents. Options are abort,
warn and ignore. With abort, abort on such files. With
warn, warn on such files and back them up as .orig. With
ignore, don't print a warning and back them up as .orig.
(default: abort)

checkunknown

Controls behavior when an unknown file that isn't ignored
has the same name as a tracked file in the changeset being
merged or updated to, and has different contents. Similar
to merge.checkignored, except for files that are not
ignored. (default: abort)

on-failure

When set to continue (the default), the merge process
attempts to merge all unresolved files using the merge
chosen tool, regardless of whether previous file merge
attempts during the process succeeded or not. Setting this
to prompt will prompt after any merge failure continue or
halt the merge process. Setting this to halt will
automatically halt the merge process on any merge tool
failure. The merge process can be restarted by using the
resolve command. When a merge is halted, the repository is
left in a normal unresolved merge state. (default:
continue)

strict-capability-check

Whether capabilities of internal merge tools are checked
strictly or not, while examining rules to decide merge tool
to be used. (default: False)

merge-patterns
This section specifies merge tools to associate with particular
file patterns. Tools matched here will take precedence over the
default merge tool. Patterns are globs by default, rooted at the
repository root.

Example:

[merge-patterns]
**.c = kdiff3
**.jpg = myimgmerge

merge-tools
This section configures external merge tools to use for file-level
merges. This section has likely been preconfigured at install
time. Use hg config merge-tools to check the existing
configuration. Also see hg help merge-tools for more details.

Example ~/.hgrc:

[merge-tools]
# Override stock tool location
kdiff3.executable = ~/bin/kdiff3
# Specify command line
kdiff3.args = $base $local $other -o $output
# Give higher priority
kdiff3.priority = 1

# Changing the priority of preconfigured tool
meld.priority = 0

# Disable a preconfigured tool
vimdiff.disabled = yes

# Define new tool
myHtmlTool.args = -m $local $other $base $output
myHtmlTool.regkey = Software\FooSoftware\HtmlMerge
myHtmlTool.priority = 1

Supported arguments:

priority

The priority in which to evaluate this tool. (default: 0)

executable

Either just the name of the executable or its pathname.

On Windows, the path can use environment variables with
${ProgramFiles} syntax.

(default: the tool name)

args

The arguments to pass to the tool executable. You can refer
to the files being merged as well as the output file
through these variables: $base, $local, $other, $output.

The meaning of $local and $other can vary depending on
which action is being performed. During an update or merge,
$local represents the original state of the file, while
$other represents the commit you are updating to or the
commit you are merging with. During a rebase, $local
represents the destination of the rebase, and $other
represents the commit being rebased.

Some operations define custom labels to assist with
identifying the revisions, accessible via $labellocal,
$labelother, and $labelbase. If custom labels are not
available, these will be local, other, and base,
respectively. (default: $local $base $other)

premerge

Attempt to run internal non-interactive 3-way merge tool
before launching external tool. Options are true, false,
keep, keep-merge3, or keep-mergediff (experimental). The
keep option will leave markers in the file if the premerge
fails. The keep-merge3 will do the same but include
information about the base of the merge in the marker (see
internal :merge3 in hg help merge-tools). The
keep-mergediff option is similar but uses a different
marker style (see internal :merge3 in hg help merge-tools).
(default: True)

binary

This tool can merge binary files. (default: False, unless
tool was selected by file pattern match)

symlink

This tool can merge symlinks. (default: False)

check

A list of merge success-checking options:

changed

Ask whether merge was successful when the merged
file shows no changes.

conflicts

Check whether there are conflicts even though the
tool reported success.

prompt

Always prompt for merge success, regardless of
success reported by tool.

fixeol

Attempt to fix up EOL changes caused by the merge tool.
(default: False)

gui

This tool requires a graphical interface to run. (default:
False)

mergemarkers

Controls whether the labels passed via $labellocal,
$labelother, and $labelbase are detailed (respecting
mergemarkertemplate) or basic. If premerge is keep or
keep-merge3, the conflict markers generated during premerge
will be detailed if either this option or the corresponding
option in the [ui] section is detailed. (default: basic)

mergemarkertemplate

This setting can be used to override mergemarker from the
[command-templates] section on a per-tool basis; this
applies to the $label-prefixed variables and to the
conflict markers that are generated if premerge is keep` or
``keep-merge3. See the corresponding variable in [ui] for
more information.

regkey

Windows registry key which describes install location of
this tool. Mercurial will search for this key first under
HKEY_CURRENT_USER and then under HKEY_LOCAL_MACHINE.
(default: None)

regkeyalt

An alternate Windows registry key to try if the first key
is not found. The alternate key uses the same regname and
regappend semantics of the primary key. The most common
use for this key is to search for 32bit applications on
64bit operating systems. (default: None)

regname

Name of value to read from specified registry key.
(default: the unnamed (default) value)

regappend

String to append to the value read from the registry,
typically the executable name of the tool. (default: None)

pager
Setting used to control when to paginate and with what external
tool. See hg help pager for details.

pager

Define the external tool used as pager.

If no pager is set, Mercurial uses the environment variable
$PAGER. If neither pager.pager, nor $PAGER is set, a
default pager will be used, typically less on Unix and more
on Windows. Example:

[pager]
pager = less -FRX

ignore

List of commands to disable the pager for. Example:

[pager]
ignore = version, help, update

patch
Settings used when applying patches, for instance through the
'import' command or with Mercurial Queues extension.

eol

When set to 'strict' patch content and patched files end of
lines are preserved. When set to lf or crlf, both files end
of lines are ignored when patching and the result line
endings are normalized to either LF (Unix) or CRLF
(Windows). When set to auto, end of lines are again ignored
while patching but line endings in patched files are
normalized to their original setting on a per-file basis.
If target file does not exist or has no end of line, patch
line endings are preserved. (default: strict)

fuzz

The number of lines of 'fuzz' to allow when applying
patches. This controls how much context the patcher is
allowed to ignore when trying to apply a patch. (default:
2)

paths
Assigns symbolic names and behavior to repositories.

Options are symbolic names defining the URL or directory that is
the location of the repository. Example:

[paths]
my_server = https://example.com/my_repo
local_path = /home/me/repo

These symbolic names can be used from the command line. To pull
from my_server: hg pull my_server. To push to local_path: hg push
local_path. You can check hg help urls for details about valid
URLs.

Options containing colons (:) denote sub-options that can
influence behavior for that specific path. Example:

[paths]
my_server = https://example.com/my_path
my_server:pushurl = ssh://example.com/my_path

Paths using the path://otherpath scheme will inherit the
sub-options value from the path they point to.

The following sub-options can be defined:

multi-urls

A boolean option. When enabled the value of the [paths]
entry will be parsed as a list and the alias will resolve
to multiple destination. If some of the list entry use the
path:// syntax, the suboption will be inherited
individually.

pushurl

The URL to use for push operations. If not defined, the
location defined by the path's main entry is used.

pushrev

A revset defining which revisions to push by default.

When hg push is executed without a -r argument, the revset
defined by this sub-option is evaluated to determine what
to push.

For example, a value of . will push the working directory's
revision by default.

Revsets specifying bookmarks will not result in the
bookmark being pushed.

bookmarks.mode

How bookmark will be dealt during the exchange. It support
the following value

• default: the default behavior, local and remote bookmarks
are "merged" on push/pull.

• mirror: when pulling, replace local bookmarks by remote
bookmarks. This is useful to replicate a repository, or
as an optimization.

• ignore: ignore bookmarks during exchange. (This
currently only affect pulling)

The following special named paths exist:

default

The URL or directory to use when no source or remote is
specified.

hg clone will automatically define this path to the
location the repository was cloned from.

default-push

(deprecated) The URL or directory for the default hg push
location. default:pushurl should be used instead.

phases
Specifies default handling of phases. See hg help phases for more
information about working with phases.

publish

Controls draft phase behavior when working as a server.
When true, pushed changesets are set to public in both
client and server and pulled or cloned changesets are set
to public in the client. (default: True)

new-commit

Phase of newly-created commits. (default: draft)

checksubrepos

Check the phase of the current revision of each
subrepository. Allowed values are "ignore", "follow" and
"abort". For settings other than "ignore", the phase of the
current revision of each subrepository is checked before
committing the parent repository. If any of those phases is
greater than the phase of the parent repository (e.g. if a
subrepo is in a "secret" phase while the parent repo is in
"draft" phase), the commit is either aborted (if
checksubrepos is set to "abort") or the higher phase is
used for the parent repository commit (if set to "follow").
(default: follow)

profiling
Specifies profiling type, format, and file output. Two profilers
are supported: an instrumenting profiler (named ls), and a
sampling profiler (named stat).

In this section description, 'profiling data' stands for the raw
data collected during profiling, while 'profiling report' stands
for a statistical text report generated from the profiling data.

enabled

Enable the profiler. (default: false)

This is equivalent to passing --profile on the command
line.

type

The type of profiler to use. (default: stat)

Use Python's built-in instrumenting profiler. This
profiler works on all platforms, but each line
number it reports is the first line of a function.
This restriction makes it difficult to identify the
expensive parts of a non-trivial function.

stat

Use a statistical profiler, statprof. This profiler
is most useful for profiling commands that run for
longer than about 0.1 seconds.

format

Profiling format. Specific to the ls instrumenting
profiler. (default: text)

text

Generate a profiling report. When saving to a file,
it should be noted that only the report is saved,
and the profiling data is not kept.

kcachegrind

Format profiling data for kcachegrind use: when
saving to a file, the generated file can directly be
loaded into kcachegrind.

statformat

Profiling format for the stat profiler. (default: hotpath)

hotpath

Show a tree-based display containing the hot path of
execution (where most time was spent).

bymethod

Show a table of methods ordered by how frequently
they are active.

byline

Show a table of lines in files ordered by how
frequently they are active.

json

Render profiling data as JSON.

freq

Sampling frequency. Specific to the stat sampling
profiler. (default: 1000)

output

File path where profiling data or report should be saved.
If the file exists, it is replaced. (default: None, data is
printed on stderr)

sort

Sort field. Specific to the ls instrumenting profiler.
One of callcount, reccallcount, totaltime and inlinetime.
(default: inlinetime)

time-track

Control if the stat profiler track cpu or real time.
(default: cpu on Windows, otherwise real)

limit

Number of lines to show. Specific to the ls instrumenting
profiler. (default: 30)

nested

Show at most this number of lines of drill-down info after
each main entry. This can help explain the difference
between Total and Inline. Specific to the ls instrumenting
profiler. (default: 0)

showmin

Minimum fraction of samples an entry must have for it to be
displayed. Can be specified as a float between 0.0 and 1.0
or can have a % afterwards to allow values up to 100. e.g.
5%.

Only used by the stat profiler.

For the hotpath format, default is 0.05. For the chrome
format, default is 0.005.

The option is unused on other formats.

showmax

Maximum fraction of samples an entry can have before it is
ignored in display. Values format is the same as showmin.

Only used by the stat profiler.

For the chrome format, default is 0.999.

The option is unused on other formats.

showtime

Show time taken as absolute durations, in addition to
percentages. Only used by the hotpath format. (default:
true)

progress
Mercurial commands can draw progress bars that are as informative
as possible. Some progress bars only offer indeterminate
information, while others have a definite end point.

debug

Whether to print debug info when updating the progress bar.
(default: False)

delay

Number of seconds (float) before showing the progress bar.
(default: 3)

changedelay

Minimum delay before showing a new topic. When set to less
than 3 * refresh, that value will be used instead.
(default: 1)

estimateinterval

Maximum sampling interval in seconds for speed and
estimated time calculation. (default: 60)

refresh

Time in seconds between refreshes of the progress bar.
(default: 0.1)

format

Format of the progress bar.

Valid entries for the format field are topic, bar, number,
unit, estimate, speed, and item. item defaults to the last
20 characters of the item, but this can be changed by
adding either -<num> which would take the last num
characters, or +<num> for the first num characters.

(default: topic bar number estimate)

width

If set, the maximum width of the progress information (that
is, min(width, term width) will be used).

clear-complete

Clear the progress bar after it's done. (default: True)

disable

If true, don't show a progress bar.

assume-tty

If true, ALWAYS show a progress bar, unless disable is
given.

rebase
evolution.allowdivergence

Default to False, when True allow creating divergence when
performing rebase of obsolete changesets.

revsetalias
Alias definitions for revsets. See hg help revsets for details.

rewrite
backup-bundle

Whether to save stripped changesets to a bundle file.
(default: True)

update-timestamp

If true, updates the date and time of the changeset to
current. It is only applicable for hg amend, hg commit
--amend and hg uncommit in the current version.

empty-successor

Control what happens with empty successors that are the result
of rewrite operations. If set to skip, the successor is not
created. If set to keep, the empty successor is created and
kept.

Currently, only the rebase and absorb commands consider this
configuration. (EXPERIMENTAL)

share
safe-mismatch.source-safe

Controls what happens when the shared repository does not
use the share-safe mechanism but its source repository
does.

Possible values are abort (default), allow, upgrade-abort
and upgrade-allow.

abort Disallows running any command and aborts allow
Respects the feature presence in the share source
upgrade-abort tries to upgrade the share to use share-safe;
if it fails, aborts upgrade-allow tries to upgrade the
share; if it fails, continue by respecting the share source
setting

Check hg help config.format.use-share-safe for details
about the share-safe feature.

safe-mismatch.source-safe.warn

Shows a warning on operations if the shared repository does
not use share-safe, but the source repository does.
(default: True)

safe-mismatch.source-not-safe

Controls what happens when the shared repository uses the
share-safe mechanism but its source does not.

Possible values are abort (default), allow, downgrade-abort
and downgrade-allow.

abort Disallows running any command and aborts allow
Respects the feature presence in the share source
downgrade-abort tries to downgrade the share to not use
share-safe; if it fails, aborts downgrade-allow tries to
downgrade the share to not use share-safe; if it fails,
continue by respecting the shared source setting

Check hg help config.format.use-share-safe for details
about the share-safe feature.

safe-mismatch.source-not-safe.warn

Shows a warning on operations if the shared repository uses
share-safe, but the source repository does not. (default:
True)

storage
Control the strategy Mercurial uses internally to store history.
Options in this category impact performance and repository size.

revlog.issue6528.fix-incoming

Version 5.8 of Mercurial had a bug leading to altering the
parent of file revision with copy information (or any other
metadata) on exchange. This leads to the copy metadata to
be overlooked by various internal logic. The issue was
fixed in Mercurial 5.8.1. (See
https://bz.mercurial-scm.org/show_bug.cgi?id=6528 for
details)

As a result Mercurial is now checking and fixing incoming
file revisions to make sure there parents are in the right
order. This behavior can be disabled by setting this option
to no. This apply to revisions added through push, pull,
clone and unbundle.

To fix affected revisions that already exist within the
repository, one can use hg debug-repair-issue-6528.

revlog.optimize-delta-parent-choice

When storing a merge revision, both parents will be equally
considered as a possible delta base. This results in better
delta selection and improved revlog compression. This
option is enabled by default.

Turning this option off can result in large increase of
repository size for repository with many merges.

revlog.persistent-nodemap.mmap

Whether to use the Operating System "memory mapping"
feature (when possible) to access the persistent nodemap
data. This improve performance and reduce memory pressure.

Default to True.

For details on the "persistent-nodemap" feature, see: hg
help config.format.use-persistent-nodemap.

revlog.persistent-nodemap.slow-path

Control the behavior of Merucrial when using a repository
with "persistent" nodemap with an installation of Mercurial
without a fast implementation for the feature:

allow: Silently use the slower implementation to access the
repository. warn: Warn, but use the slower implementation
to access the repository. abort: Prevent access to such
repositories. (This is the default)

For details on the "persistent-nodemap" feature, see: hg
help config.format.use-persistent-nodemap.

revlog.reuse-external-delta-parent

Control the order in which delta parents are considered
when adding new revisions from an external source.
(typically: apply bundle from hg pull or hg push).

New revisions are usually provided as a delta against other
revisions. By default, Mercurial will try to reuse this
delta first, therefore using the same "delta parent" as the
source. Directly using delta's from the source reduces CPU
usage and usually speeds up operation. However, in some
case, the source might have sub-optimal delta bases and
forcing their reevaluation is useful. For example, pushes
from an old client could have sub-optimal delta's parent
that the server want to optimize. (lack of general delta,
bad parents, choice, lack of sparse-revlog, etc).

This option is enabled by default. Turning it off will
ensure bad delta parent choices from older client do not
propagate to this repository, at the cost of a small
increase in CPU consumption.

Note: this option only control the order in which delta
parents are considered. Even when disabled, the existing
delta from the source will be reused if the same delta
parent is selected.

revlog.reuse-external-delta

Control the reuse of delta from external source.
(typically: apply bundle from hg pull or hg push).

New revisions are usually provided as a delta against
another revision. By default, Mercurial will not recompute
the same delta again, trusting externally provided deltas.
There have been rare cases of small adjustment to the
diffing algorithm in the past. So in some rare case,
recomputing delta provided by ancient clients can provides
better results. Disabling this option means going through a
full delta recomputation for all incoming revisions. It
means a large increase in CPU usage and will slow
operations down.

This option is enabled by default. When disabled, it also
disables the related
storage.revlog.reuse-external-delta-parent option.

revlog.zlib.level

Zlib compression level used when storing data into the
repository. Accepted Value range from 1 (lowest
compression) to 9 (highest compression). Zlib default value
is 6.

revlog.zstd.level

zstd compression level used when storing data into the
repository. Accepted Value range from 1 (lowest
compression) to 22 (highest compression). (default 3)

server
Controls generic server settings.

bookmarks-pushkey-compat

Trigger pushkey hook when being pushed bookmark updates.
This config exist for compatibility purpose (default to
True)

If you use pushkey and pre-pushkey hooks to control
bookmark movement we recommend you migrate them to
txnclose-bookmark and pretxnclose-bookmark.

compressionengines

List of compression engines and their relative priority to
advertise to clients.

The order of compression engines determines their priority,
the first having the highest priority. If a compression
engine is not listed here, it won't be advertised to
clients.

If not set (the default), built-in defaults are used. Run
hg debuginstall to list available compression engines and
their default wire protocol priority.

Older Mercurial clients only support zlib compression and
this setting has no effect for legacy clients.

uncompressed

Whether to allow clients to clone a repository using the
uncompressed streaming protocol. This transfers about 40%
more data than a regular clone, but uses less memory and
CPU on both server and client. Over a LAN (100 Mbps or
better) or a very fast WAN, an uncompressed streaming clone
is a lot faster (~10x) than a regular clone. Over most WAN
connections (anything slower than about 6 Mbps),
uncompressed streaming is slower, because of the extra data
transfer overhead. This mode will also temporarily hold the
write lock while determining what data to transfer.
(default: True)

uncompressedallowsecret

Whether to allow stream clones when the repository contains
secret changesets. (default: False)

preferuncompressed

When set, clients will try to use the uncompressed
streaming protocol. (default: False)

disablefullbundle

When set, servers will refuse attempts to do pull-based
clones. If this option is set, preferuncompressed and/or
clone bundles are highly recommended. Partial clones will
still be allowed. (default: False)

streamunbundle

When set, servers will apply data sent from the client
directly, otherwise it will be written to a temporary file
first. This option effectively prevents concurrent pushes.

pullbundle

When set, the server will check pullbundles.manifest for
bundles covering the requested heads and common nodes. The
first matching entry will be streamed to the client.

For HTTP transport, the stream will still use zlib
compression for older clients.

concurrent-push-mode

Level of allowed race condition between two pushing
clients.

• 'strict': push is abort if another client touched the
repository while the push was preparing.

• 'check-related': push is only aborted if it affects head
that got also affected while the push was preparing.
(default since 5.4)

'check-related' only takes effect for compatible clients
(version 4.3 and later). Older clients will use 'strict'.

validate

Whether to validate the completeness of pushed changesets
by checking that all new file revisions specified in
manifests are present. (default: False)

maxhttpheaderlen

Instruct HTTP clients not to send request headers longer
than this many bytes. (default: 1024)

bundle1

Whether to allow clients to push and pull using the legacy
bundle1 exchange format. (default: True)

bundle1gd

Like bundle1 but only used if the repository is using the
generaldelta storage format. (default: True)

bundle1.push

Whether to allow clients to push using the legacy bundle1
exchange format. (default: True)

bundle1gd.push

Like bundle1.push but only used if the repository is using
the generaldelta storage format. (default: True)

bundle1.pull

Whether to allow clients to pull using the legacy bundle1
exchange format. (default: True)

bundle1gd.pull

Like bundle1.pull but only used if the repository is using
the generaldelta storage format. (default: True)

Large repositories using the generaldelta storage format
should consider setting this option because converting
generaldelta repositories to the exchange format required
by the bundle1 data format can consume a lot of CPU.

bundle2.stream

Whether to allow clients to pull using the bundle2
streaming protocol. (default: True)

zliblevel

Integer between -1 and 9 that controls the zlib compression
level for wire protocol commands that send zlib compressed
output (notably the commands that send repository history
data).

The default (-1) uses the default zlib compression level,
which is likely equivalent to 6. 0 means no compression. 9
means maximum compression.

Setting this option allows server operators to make
trade-offs between bandwidth and CPU used. Lowering the
compression lowers CPU utilization but sends more bytes to
clients.

This option only impacts the HTTP server.

zstdlevel

Integer between 1 and 22 that controls the zstd compression
level for wire protocol commands. 1 is the minimal amount
of compression and 22 is the highest amount of compression.

The default (3) should be significantly faster than zlib
while likely delivering better compression ratios.

This option only impacts the HTTP server.

See also server.zliblevel.

view

Repository filter used when exchanging revisions with the
peer.

The default view (served) excludes secret and hidden
changesets. Another useful value is immutable (no draft,
secret or hidden changesets). (EXPERIMENTAL)

smtp
Configuration for extensions that need to send email messages.

host

Host name of mail server, e.g. "mail.example.com".

port

Optional. Port to connect to on mail server. (default: 465
if tls is smtps; 25 otherwise)

tls

Optional. Method to enable TLS when connecting to mail
server: starttls, smtps or none. (default: none)

username

Optional. User name for authenticating with the SMTP
server. (default: None)

password

Optional. Password for authenticating with the SMTP server.
If not specified, interactive sessions will prompt the user
for a password; non-interactive sessions will fail.
(default: None)

local_hostname

Optional. The hostname that the sender can use to identify
itself to the MTA.

subpaths
Subrepository source URLs can go stale if a remote server changes
name or becomes temporarily unavailable. This section lets you
define rewrite rules of the form:

where pattern is a regular expression matching a subrepository
source URL and replacement is the replacement string used to
rewrite it. Groups can be matched in pattern and referenced in
replacements. For instance:

http://server/(.*)-hg/ = http://hg.server/\1/

rewrites http://server/foo-hg/ into http://hg.server/foo/ .

Relative subrepository paths are first made absolute, and the
rewrite rules are then applied on the full (absolute) path. If
pattern doesn't match the full path, an attempt is made to apply
it on the relative path alone. The rules are applied in definition
order.

subrepos
This section contains options that control the behavior of the
subrepositories feature. See also hg help subrepos.

Security note: auditing in Mercurial is known to be insufficient
to prevent clone-time code execution with carefully constructed
Git subrepos. It is unknown if a similar detect is present in
Subversion subrepos. Both Git and Subversion subrepos are disabled
by default out of security concerns. These subrepo types can be
enabled using the respective options below.

allowed

Whether subrepositories are allowed in the working
directory.

When false, commands involving subrepositories (like hg
update) will fail for all subrepository types. (default:
true)

hg:allowed

Whether Mercurial subrepositories are allowed in the
working directory. This option only has an effect if
subrepos.allowed is true. (default: true)

git:allowed

Whether Git subrepositories are allowed in the working
directory. This option only has an effect if
subrepos.allowed is true.

See the security note above before enabling Git subrepos.
(default: false)

svn:allowed

Whether Subversion subrepositories are allowed in the
working directory. This option only has an effect if
subrepos.allowed is true.

See the security note above before enabling Subversion
subrepos. (default: false)

templatealias
Alias definitions for templates. See hg help templates for
details.

templates
Use the [templates] section to define template strings. See hg
help templates for details.

trusted
Mercurial will not use the settings in the .hg/hgrc file from a
repository if it doesn't belong to a trusted user or to a trusted
group, as various hgrc features allow arbitrary commands to be
run. This issue is often encountered when configuring hooks or
extensions for shared repositories or servers. However, the web
interface will use some safe settings from the [web] section.

This section specifies what users and groups are trusted. The
current user is always trusted. To trust everybody, list a user or
a group with name *. These settings must be placed in an
already-trusted file to take effect, such as $HOME/.hgrc of the
user or service running Mercurial.

users

Comma-separated list of trusted users.

groups

Comma-separated list of trusted groups.

ui
User interface controls.

archivemeta

Whether to include the .hg_archival.txt file containing
meta data (hashes for the repository base and for tip) in
archives created by the hg archive command or downloaded
via hgweb. (default: True)

askusername

Whether to prompt for a username when committing. If True,
and neither $HGUSER nor $EMAIL has been specified, then the
user will be prompted to enter a username. If no username
is entered, the default USER@HOST is used instead.
(default: False)

clonebundles

Whether the "clone bundles" feature is enabled.

When enabled, hg clone may download and apply a
server-advertised bundle file from a URL instead of using
the normal exchange mechanism.

This can likely result in faster and more reliable clones.

(default: True)

clonebundlefallback

Whether failure to apply an advertised "clone bundle" from
a server should result in fallback to a regular clone.

This is disabled by default because servers advertising
"clone bundles" often do so to reduce server load. If
advertised bundles start mass failing and clients
automatically fall back to a regular clone, this would add
significant and unexpected load to the server since the
server is expecting clone operations to be offloaded to
pre-generated bundles. Failing fast (the default behavior)
ensures clients don't overwhelm the server when "clone
bundle" application fails.

(default: False)

clonebundleprefers

Defines preferences for which "clone bundles" to use.

Servers advertising "clone bundles" may advertise multiple
available bundles. Each bundle may have different
attributes, such as the bundle type and compression format.
This option is used to prefer a particular bundle over
another.

The following keys are defined by Mercurial:

BUNDLESPEC
A bundle type specifier. These are strings passed to
hg bundle -t. e.g. gzip-v2 or bzip2-v1.

COMPRESSION
The compression format of the bundle. e.g. gzip and
bzip2.

Server operators may define custom keys.

Example values: COMPRESSION=bzip2, BUNDLESPEC=gzip-v2,
COMPRESSION=gzip.

By default, the first bundle advertised by the server is
used.

color

When to colorize output. Possible value are Boolean ("yes"
or "no"), or "debug", or "always". (default: "yes"). "yes"
will use color whenever it seems possible. See hg help
color for details.

commitsubrepos

Whether to commit modified subrepositories when committing
the parent repository. If False and one subrepository has
uncommitted changes, abort the commit. (default: False)

debug

Print debugging information. (default: False)

editor

The editor to use during a commit. (default: $EDITOR or vi)

fallbackencoding

Encoding to try if it's not possible to decode the
changelog using UTF-8. (default: ISO-8859-1)

graphnodetemplate

(DEPRECATED) Use command-templates.graphnode instead.

ignore

A file to read per-user ignore patterns from. This file
should be in the same format as a repository-wide .hgignore
file. Filenames are relative to the repository root. This
option supports hook syntax, so if you want to specify
multiple ignore files, you can do so by setting something
like ignore.other = ~/.hgignore2. For details of the ignore
file format, see the hgignore(5) man page.

interactive

Allow to prompt the user. (default: True)

interface

Select the default interface for interactive features
(default: text). Possible values are 'text' and 'curses'.

interface.chunkselector

Select the interface for change recording (e.g. hg commit
-i). Possible values are 'text' and 'curses'. This config
overrides the interface specified by ui.interface.

large-file-limit

Largest file size that gives no memory use warning.
Possible values are integers or 0 to disable the check.
Value is expressed in bytes by default, one can use
standard units for convenience (e.g. 10MB, 0.1GB, etc)
(default: 10MB)

logtemplate

(DEPRECATED) Use command-templates.log instead.

merge

The conflict resolution program to use during a manual
merge. For more information on merge tools see hg help
merge-tools. For configuring merge tools see the
[merge-tools] section.

mergemarkers

Sets the merge conflict marker label styling. The detailed
style uses the command-templates.mergemarker setting to
style the labels. The basic style just uses 'local' and
'other' as the marker label. One of basic or detailed.
(default: basic)

mergemarkertemplate

(DEPRECATED) Use command-templates.mergemarker instead.

message-output

Where to write status and error messages. (default: stdio)

channel

Use separate channel for structured output.
(Command-server only)

stderr

Everything to stderr.

stdio

Status to stdout, and error to stderr.

origbackuppath

The path to a directory used to store generated .orig
files. If the path is not a directory, one will be created.
If set, files stored in this directory have the same name
as the original file and do not have a .orig suffix.

paginate

Control the pagination of command output (default: True).
See hg help pager for details.

patch

An optional external tool that hg import and some
extensions will use for applying patches. By default
Mercurial uses an internal patch utility. The external tool
must work as the common Unix patch program. In particular,
it must accept a -p argument to strip patch headers, a -d
argument to specify the current directory, a file name to
patch, and a patch file to take from stdin.

It is possible to specify a patch tool together with extra
arguments. For example, setting this option to patch
--merge will use the patch program with its 2-way merge
option.

portablefilenames

Check for portable filenames. Can be warn, ignore or abort.
(default: warn)

warn

Print a warning message on POSIX platforms, if a
file with a non-portable filename is added (e.g. a
file with a name that can't be created on Windows
because it contains reserved parts like AUX,
reserved characters like :, or would cause a case
collision with an existing file).

ignore

Don't print a warning.

abort

The command is aborted.

true

Alias for warn.

false

Alias for ignore.

On Windows, this configuration option is ignored and the
command aborted.

pre-merge-tool-output-template

(DEPRECATED) Use command-template.pre-merge-tool-output
instead.

quiet

Reduce the amount of output printed. (default: False)

relative-paths

Prefer relative paths in the UI.

remotecmd

Remote command to use for clone/push/pull operations.
(default: hg)

report_untrusted

Warn if a .hg/hgrc file is ignored due to not being owned
by a trusted user or group. (default: True)

slash

(Deprecated. Use slashpath template filter instead.)

Display paths using a slash (/) as the path separator. This
only makes a difference on systems where the default path
separator is not the slash character (e.g. Windows uses the
backslash character (\)). (default: False)

statuscopies

Display copies in the status command.

ssh

Command to use for SSH connections. (default: ssh)

ssherrorhint

A hint shown to the user in the case of SSH error (e.g.
Please see http://company/internalwiki/ssh.html)

strict

Require exact command names, instead of allowing
unambiguous abbreviations. (default: False)

style

Name of style to use for command output.

supportcontact

A URL where users should report a Mercurial traceback. Use
this if you are a large organisation with its own Mercurial
deployment process and crash reports should be addressed to
your internal support.

textwidth

Maximum width of help text. A longer line generated by hg
help or hg subcommand --help will be broken after white
space to get this width or the terminal width, whichever
comes first. A non-positive value will disable this and
the terminal width will be used. (default: 78)

timeout

The timeout used when a lock is held (in seconds), a
negative value means no timeout. (default: 600)

timeout.warn

Time (in seconds) before a warning is printed about held
lock. A negative value means no warning. (default: 0)

traceback

Mercurial always prints a traceback when an unknown
exception occurs. Setting this to True will make Mercurial
print a traceback on all exceptions, even those recognized
by Mercurial (such as IOError or MemoryError). (default:
False)

tweakdefaults

By default Mercurial's behavior changes very little from
release to release, but over time the recommended config
settings shift. Enable this config to opt in to get automatic
tweaks to Mercurial's behavior over time. This config setting
will have no effect if HGPLAIN is set or HGPLAINEXCEPT is set
and does not include tweakdefaults. (default: False)

It currently means:

[ui]
# The rollback command is dangerous. As a rule, don't use it.
rollback = False
# Make `hg status` report copy information
statuscopies = yes
# Prefer curses UIs when available. Revert to plain-text with `text`.
interface = curses
# Make compatible commands emit cwd-relative paths by default.
relative-paths = yes

[commands]
# Grep working directory by default.
grep.all-files = True
# Refuse to perform an `hg update` that would cause a file content merge
update.check = noconflict
# Show conflicts information in `hg status`
status.verbose = True
# Make `hg resolve` with no action (like `-m`) fail instead of re-merging.
resolve.explicit-re-merge = True

[diff]
git = 1
showfunc = 1
word-diff = 1

username

The committer of a changeset created when running "commit".
Typically a person's name and email address, e.g. Fred
Widget <[email protected]>. Environment variables in the
username are expanded.

(default: $EMAIL or username@hostname. If the username in
hgrc is empty, e.g. if the system admin set username = in
the system hgrc, it has to be specified manually or in a
different hgrc file)

verbose

Increase the amount of output printed. (default: False)

command-templates
Templates used for customizing the output of commands.

graphnode

The template used to print changeset nodes in an ASCII
revision graph. (default: {graphnode})

log

Template string for commands that print changesets.

mergemarker

The template used to print the commit description next to
each conflict marker during merge conflicts. See hg help
templates for the template format.

Defaults to showing the hash, tags, branches, bookmarks,
author, and the first line of the commit description.

If you use non-ASCII characters in names for tags,
branches, bookmarks, authors, and/or commit descriptions,
you must pay attention to encodings of managed files. At
template expansion, non-ASCII characters use the encoding
specified by the --encoding global option, HGENCODING or
other environment variables that govern your locale. If the
encoding of the merge markers is different from the
encoding of the merged files, serious problems may occur.

Can be overridden per-merge-tool, see the [merge-tools]
section.

oneline-summary

A template used by hg rebase and other commands for showing
a one-line summary of a commit. If the template configured
here is longer than one line, then only the first line is
used.

The template can be overridden per command by defining a
template in oneline-summary.<command>, where <command> can
be e.g. "rebase".

pre-merge-tool-output

A template that is printed before executing an external
merge tool. This can be used to print out additional
context that might be useful to have during the conflict
resolution, such as the description of the various commits
involved or bookmarks/tags.

Additional information is available in the local`, ``base,
and other dicts. For example: {local.label}, {base.name},
or {other.islink}.

web
Web interface configuration. The settings in this section apply to
both the builtin webserver (started by hg serve) and the script
you run through a webserver (hgweb.cgi and the derivatives for
FastCGI and WSGI).

The Mercurial webserver does no authentication (it does not prompt
for usernames and passwords to validate who users are), but it
does do authorization (it grants or denies access for
authenticated users based on settings in this section). You must
either configure your webserver to do authentication for you, or
disable the authorization checks.

For a quick setup in a trusted environment, e.g., a private LAN,
where you want it to accept pushes from anybody, you can use the
following command line:

$ hg --config web.allow-push=* --config web.push_ssl=False serve

Note that this will allow anybody to push anything to the server
and that this should not be used for public servers.

The full set of options is:

accesslog

Where to output the access log. (default: stdout)

address

Interface address to bind to. (default: all)

allow-archive

List of archive format (bz2, gz, zip) allowed for
downloading. (default: empty)

allowbz2

(DEPRECATED) Whether to allow .tar.bz2 downloading of
repository revisions. (default: False)

allowgz

(DEPRECATED) Whether to allow .tar.gz downloading of
repository revisions. (default: False)

allow-pull

Whether to allow pulling from the repository. (default:
True)

allow-push

Whether to allow pushing to the repository. If empty or not
set, pushing is not allowed. If the special value *, any
remote user can push, including unauthenticated users.
Otherwise, the remote user must have been authenticated,
and the authenticated user name must be present in this
list. The contents of the allow-push list are examined
after the deny_push list.

allow_read

If the user has not already been denied repository access
due to the contents of deny_read, this list determines
whether to grant repository access to the user. If this
list is not empty, and the user is unauthenticated or not
present in the list, then access is denied for the user. If
the list is empty or not set, then access is permitted to
all users by default. Setting allow_read to the special
value * is equivalent to it not being set (i.e. access is
permitted to all users). The contents of the allow_read
list are examined after the deny_read list.

allowzip

(DEPRECATED) Whether to allow .zip downloading of
repository revisions. This feature creates temporary files.
(default: False)

archivesubrepos

Whether to recurse into subrepositories when archiving.
(default: False)

baseurl

Base URL to use when publishing URLs in other locations, so
third-party tools like email notification hooks can
construct URLs. Example: http://hgserver/repos/ .

cacerts

Path to file containing a list of PEM encoded certificate
authority certificates. Environment variables and ~user
constructs are expanded in the filename. If specified on
the client, then it will verify the identity of remote
HTTPS servers with these certificates.

To disable SSL verification temporarily, specify --insecure
from command line.

You can use OpenSSL's CA certificate file if your platform
has one. On most Linux systems this will be
/etc/ssl/certs/ca-certificates.crt. Otherwise you will have
to generate this file manually. The form must be as
follows:

-----BEGIN CERTIFICATE-----
... (certificate in base64 PEM encoding) ...
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
... (certificate in base64 PEM encoding) ...
-----END CERTIFICATE-----

cache

Whether to support caching in hgweb. (default: True)

certificate

Certificate to use when running hg serve.

collapse

With descend enabled, repositories in subdirectories are
shown at a single level alongside repositories in the
current path. With collapse also enabled, repositories
residing at a deeper level than the current path are
grouped behind navigable directory entries that lead to the
locations of these repositories. In effect, this setting
collapses each collection of repositories found within a
subdirectory into a single entry for that subdirectory.
(default: False)

comparisoncontext

Number of lines of context to show in side-by-side file
comparison. If negative or the value full, whole files are
shown. (default: 5)

This setting can be overridden by a context request
parameter to the comparison command, taking the same
values.

contact

Name or email address of the person in charge of the
repository. (default: ui.username or $EMAIL or "unknown"
if unset or empty)

csp

Send a Content-Security-Policy HTTP header with this value.

The value may contain a special string %nonce%, which will
be replaced by a randomly-generated one-time use value. If
the value contains %nonce%, web.cache will be disabled, as
caching undermines the one-time property of the nonce. This
nonce will also be inserted into <script> elements
containing inline JavaScript.

Note: lots of HTML content sent by the server is derived
from repository data. Please consider the potential for
malicious repository data to "inject" itself into generated
HTML content as part of your security threat model.

deny_push

Whether to deny pushing to the repository. If empty or not
set, push is not denied. If the special value *, all remote
users are denied push. Otherwise, unauthenticated users are
all denied, and any authenticated user name present in this
list is also denied. The contents of the deny_push list are
examined before the allow-push list.

deny_read

Whether to deny reading/viewing of the repository. If this
list is not empty, unauthenticated users are all denied,
and any authenticated user name present in this list is
also denied access to the repository. If set to the special
value *, all remote users are denied access (rarely needed
;). If deny_read is empty or not set, the determination of
repository access depends on the presence and content of
the allow_read list (see description). If both deny_read
and allow_read are empty or not set, then access is
permitted to all users by default. If the repository is
being served via hgwebdir, denied users will not be able to
see it in the list of repositories. The contents of the
deny_read list have priority over (are examined before) the
contents of the allow_read list.

descend

hgwebdir indexes will not descend into subdirectories. Only
repositories directly in the current path will be shown
(other repositories are still available from the index
corresponding to their containing path).

description

Textual description of the repository's purpose or
contents. (default: "unknown")

encoding

Character encoding name. (default: the current locale
charset) Example: "UTF-8".

errorlog

Where to output the error log. (default: stderr)

guessmime

Control MIME types for raw download of file content. Set
to True to let hgweb guess the content type from the file
extension. This will serve HTML files as text/html and
might allow cross-site scripting attacks when serving
untrusted repositories. (default: False)

hidden

Whether to hide the repository in the hgwebdir index.
(default: False)

ipv6

Whether to use IPv6. (default: False)

labels

List of string labels associated with the repository.

Labels are exposed as a template keyword and can be used to
customize output. e.g. the index template can group or
filter repositories by labels and the summary template can
display additional content if a specific label is present.

logoimg

File name of the logo image that some templates display on
each page. The file name is relative to staticurl. That
is, the full path to the logo image is "staticurl/logoimg".
If unset, hglogo.png will be used.

logourl

Base URL to use for logos. If unset,
https://mercurial-scm.org/ will be used.

maxchanges

Maximum number of changes to list on the changelog.
(default: 10)

maxfiles

Maximum number of files to list per changeset. (default:
10)

maxshortchanges

Maximum number of changes to list on the shortlog, graph or
filelog pages. (default: 60)

name

Repository name to use in the web interface. (default:
current working directory)

port

Port to listen on. (default: 8000)

prefix

Prefix path to serve from. (default: '' (server root))

push_ssl

Whether to require that inbound pushes be transported over
SSL to prevent password sniffing. (default: True)

refreshinterval

How frequently directory listings re-scan the filesystem
for new repositories, in seconds. This is relevant when
wildcards are used to define paths. Depending on how much
filesystem traversal is required, refreshing may negatively
impact performance.

Values less than or equal to 0 always refresh. (default:
20)

server-header

Value for HTTP Server response header.

static

Directory where static files are served from.

staticurl

Base URL to use for static files. If unset, static files
(e.g. the hgicon.png favicon) will be served by the CGI
script itself. Use this setting to serve them directly with
the HTTP server. Example: http://hgserver/static/ .

stripes

How many lines a "zebra stripe" should span in multi-line
output. Set to 0 to disable. (default: 1)

style

Which template map style to use. The available options are
the names of subdirectories in the HTML templates path.
(default: paper) Example: monoblue.

templates

Where to find the HTML templates. The default path to the
HTML templates can be obtained from hg debuginstall.

websub
Web substitution filter definition. You can use this section to
define a set of regular expression substitution patterns which let
you automatically modify the hgweb server output.

The default hgweb templates only apply these substitution patterns
on the revision description fields. You can apply them anywhere
you want when you create your own templates by adding calls to the
"websub" filter (usually after calling the "escape" filter).

This can be used, for example, to convert issue references to
links to your issue tracker, or to convert "markdown-like" syntax
into HTML (see the examples below).

Each entry in this section names a substitution filter. The value
of each entry defines the substitution expression itself. The
websub expressions follow the old interhg extension syntax, which
in turn imitates the Unix sed replacement syntax:

patternname = s/SEARCH_REGEX/REPLACE_EXPRESSION/[i]

You can use any separator other than "/". The final "i" is
optional and indicates that the search must be case insensitive.

Examples:

[websub]
issues = s|issue(\d+)|<a href="http://bts.example.org/issue\1">issue\1</a>|i
italic = s/\b_(\S+)_\b/<i>\1<\/i>/
bold = s/\*\b(\S+)\b\*/<b>\1<\/b>/

worker
Parallel master/worker configuration. We currently perform working
directory updates in parallel on Unix-like systems, which greatly
helps performance.

enabled

Whether to enable workers code to be used. (default: true)

numcpus

Number of CPUs to use for parallel operations. A zero or
negative value is treated as use the default. (default: 4
or the number of CPUs on the system, whichever is larger)

backgroundclose

Whether to enable closing file handles on background
threads during certain operations. Some platforms aren't
very efficient at closing file handles that have been
written or appended to. By performing file closing on
background threads, file write rate can increase
substantially. (default: true on Windows, false elsewhere)

backgroundcloseminfilecount

Minimum number of files required to trigger background file
closing. Operations not writing this many files won't
start background close threads. (default: 2048)

backgroundclosemaxqueue

The maximum number of opened file handles waiting to be
closed in the background. This option only has an effect if
backgroundclose is enabled. (default: 384)

backgroundclosethreadcount

Number of threads to process background file closes. Only
relevant if backgroundclose is enabled. (default: 4)

AUTHOR top

       Bryan O'Sullivan <[email protected]>.

       Mercurial was written by Olivia Mackall <[email protected]>.

COPYING top

       This manual page is copyright 2005 Bryan O'Sullivan.  Mercurial is
       copyright 2005-2022 Olivia Mackall.  Free use of this software is
       granted under the terms of the GNU General Public License version
       2 or any later version.

AUTHOR top

       Bryan O'Sullivan <[email protected]>

       Organization: Mercurial

COLOPHON top

       This page is part of the hg (Mercurial source code management
       system) project.  Information about the project can be found at 
       ⟨http://mercurial.selenic.com/⟩.  If you have a bug report for this
       manual page, see ⟨http://mercurial.selenic.com/wiki/BugTracker⟩.
       This page was obtained from the project's upstream Mercurial
       repository ⟨http://selenic.com/hg⟩ on 2025-08-11.  (At that time,
       the date of the most recent commit that was found in the
       repository was 2025-08-08.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there is
       a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       [email protected]

                                                                  HGRC(5)

Pages that refer to this page: hg(1), hgignore(5)

hgrc(5) — Linux manual page

NAME top

DESCRIPTION top

TROUBLESHOOTING top

STRUCTURE top

FILES top

SYNTAX top

SECTIONS top

AUTHOR top

SEE ALSO top

COPYING top

AUTHOR top

COLOPHON top