NAME
hgrc – configuration files for Mercurial

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

FILES
Mercurial reads configuration data from several files, if they exist. 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 later paths override earlier ones.

(Unix) <install–root>/etc/mercurial/hgrc.d/*.rc, (Unix) <install–root>/etc/mercurial/hgrc
Per–installation configuration files, 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.

(Unix) /etc/mercurial/hgrc.d/*.rc, (Unix) /etc/mercurial/hgrc
Per–system configuration files, 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.

(Windows) <install–dir>\Mercurial.ini, or else, (Windows) HKEY_LOCAL_MACHINE\SOFTWARE\Mercurial, or else, (Windows) C:\Mercurial\Mercurial.ini
Per–installation/system configuration files, 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.

(Unix) $HOME/.hgrc, (Windows) %HOME%\Mercurial.ini, (Windows) %HOME%\.hgrc, (Windows) %USERPROFILE%\Mercurial.ini, (Windows) %USERPROFILE%\.hgrc
Per–user configuration file(s), for the user running Mercurial. On Windows 9x, %HOME% is replaced by %APPDATA%. Options in these files apply to all Mercurial commands executed by this user in any directory. Options in thes files override per–installation and per–system options.

(Unix, Windows) <repo>/.hg/hgrc
Per–repository configuration options that 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 Unix, most of this file will be ignored if it doesn't belong to a trusted user or to a trusted group. See the documentation for the trusted section below for more details.

SYNTAX
A configuration file consists of sections, led by a "[section]" header and followed by "name: value" entries; "name=value" is also accepted.
[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.
The optional values can contain format strings which refer to other values in the same section, or values in a special DEFAULT section.
Lines beginning with "#" or ";" are ignored and may be used to provide comments.

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

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".
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.
The most common usage is for LF <–> CRLF translation on Windows.
For this, use the "smart" convertors which check for binary files:
[extensions]
hgext.win32text =
[encode]
** = cleverencode:
[decode]
** = cleverdecode:
or if you only want to translate certain files:
[extensions]
hgext.win32text =
[encode]
**.txt = dumbencode:
[decode]
**.txt = dumbdecode:

defaults
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. They are all boolean and defaults to False.

git
Use git extended diff format.

nodates
Don't include dates in diff headers.

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.

email
Settings for extensions that send email messages.

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

to
Optional. Comma–separated list of recipients' email addresses.

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

bcc
Optional. Comma–separated list of blind carbon copy recipients' email addresses. Cannot be set interactively.

method
Optional. Method to use to send email messages. If value is "smtp" (default), use SMTP (see section "[smtp]" 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.
Email example:
[email]
from = Joseph User <joe.user@example.com>
method = /usr/sbin/sendmail

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
'hgext.foo = !/ext/path' or 'hgext.foo = !' when no path is supplied.
Example for ~/.hgrc:
[extensions]
# (the mq extension will get loaded from mercurial's path)
hgext.mq =
# (this extension will get loaded from the file specified)
myfeature = ~/.hgext/myfeature.py

format

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

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.
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
# 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.
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.
Default: $local $base $other
premerge;;
Attempt to run internal non–interactive 3–way merge tool before
launching external tool.
Default: True
binary;;
This tool can merge binary files. Defaults to False, unless tool
was selected by file pattern match.
symlink;;
This tool can merge symlinks. Defaults to False, even if tool was
selected by file pattern match.
checkconflicts;;
Check whether there are conflicts even though the tool reported
success.
Default: False
checkchanged;;
Check whether outputs were written even though the tool reported
success.
Default: False
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
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
regname;;
Name of value to read from specified registry key. Defaults to the
unnamed (default) value.
regappend;;
String to append to the value read from the registry, typically the
executable name of the tool. Default: None

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.
Example .hg/hgrc:
[hooks]
# do not use the site–wide hook
incoming =
incoming.email = /my/email/hook
incoming.autobuild = /my/build/hook
Most hooks are run with environment variables set that give added
useful information. For each hook below, the environment variables
it is passed are listed with names of the form "$HG_foo".

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

commit
Run after a changeset has been created in the local repository. 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. URL that was source of changes came is in $HG_URL.

outgoing
Run after sending changes from local repository to another. ID of first changeset sent is in $HG_NODE. Source of operation is in $HG_SOURCE; see "preoutgoing" hook for description.

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. Hook failure is ignored.

pre–<command>
Run before executing the associated command. The contents of the command line are passed as $HG_ARGS. 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. Non–zero status will cause the push, pull or unbundle to fail. 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. Non–zero status will cause the commit to fail. Parent changeset IDs are in $HG_PARENT1 and $HG_PARENT2.

preoutgoing
Run before collecting changes to send from the local repository to another. Non–zero status will cause failure. This lets you prevent pull over http or ssh. Also prevents against local pull, push (outbound) or bundle commands, but not effective, since you can just copy files instead then. Source of operation is in $HG_SOURCE. If "serve", operation is happening on behalf of remote ssh or http repository. If "push", "pull" or "bundle", operation is happening on behalf of repository on same system.

pretag
Run before creating a tag. Exit status 0 allows the tag to be created. Non–zero status will cause the tag to fail. ID of changeset to tag is in $HG_NODE. Name of tag is in $HG_TAG. Tag is local if $HG_LOCAL=1, in repo if $HG_LOCAL=0.

pretxnchangegroup
Run after a changegroup has been added via push, pull or unbundle, but before the transaction has been committed. Changegroup is visible to hook program. This lets you validate incoming changes before accepting them. Passed the ID of the first new changeset in $HG_NODE. Exit status 0 allows the transaction to commit. Non–zero status will cause the transaction to be rolled back and the push, pull or unbundle will fail. URL that was source of changes is in $HG_URL.

pretxncommit
Run after a changeset has been created but the transaction not yet committed. Changeset is visible to hook program. This lets you validate commit message and changes. Exit status 0 allows the commit to proceed. Non–zero status will cause the transaction to be rolled back. ID of changeset is in $HG_NODE. 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. Non–zero status will prevent the update. Changeset ID of first new parent is in $HG_PARENT1. If merge, ID of second new parent is in $HG_PARENT2.

tag
Run after a tag is created. ID of tagged changeset is in $HG_NODE. Name of tag is in $HG_TAG. Tag is local if $HG_LOCAL=1, in repo if $HG_LOCAL=0.

update
Run after updating the working directory. Changeset ID of first new parent is in $HG_PARENT1. If merge, ID of second new parent is in $HG_PARENT2. If update succeeded, $HG_ERROR=0. If update failed (e.g. because conflicts 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 (eg. tag) and not just the commit command.
Note2: Environment variables with empty values may not be passed to
hooks on platforms like Windows. For instance, $HG_PARENT2 will
not be available under Windows for non–merge changesets while being
set to an empty value under Unix–like systems.
The syntax for Python hooks is as follows:
hookname = python:modulename.submodule.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 failure of the hook.

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".

no
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.

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: 25.

tls
Optional. Whether to connect to mail server using TLS. True or False. Default: False.

username
Optional. User name to authenticate to SMTP server with. If username is specified, password must also be specified. Default: none.

password
Optional. Password to authenticate to SMTP server with. If username is specified, password must also be specified. Default: none.

local_hostname
Optional. It's the hostname that the sender can use to identify itself to the MTA.

paths
Assigns symbolic names to repositories. The left side is the symbolic name, and the right gives the directory or URL that is the location of the repository. Default paths can be declared by setting the following entries.

default
Directory or URL to use when pulling if no source is specified. Default is set to repository from which the current repository was cloned.

default–push
Optional. Directory or URL to use when pushing if no destination is specified.

server
Controls generic server settings.

uncompressed
Whether to allow clients to clone a repo 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 (100Mbps 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 6Mbps), uncompressed streaming is slower, because of the extra data transfer overhead. Default is False.

trusted
For security reasons, 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. The main exception is the web interface, which automatically uses some safe settings, since it's common to serve repositories from different users.
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 "*".

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 metadata (hashes for the repository base and for tip) in archives created by the hg archive command or downloaded via hgweb. Default is true.

debug
Print debugging information. True or False. Default is False.

editor
The editor to use during a commit. Default is $EDITOR or "vi".

fallbackencoding
Encoding to try if it's not possible to decode the changelog using UTF–8. Default is ISO–8859–1.

ignore
A file to read per–user ignore patterns from. This file should be in the same format as a repository–wide .hgignore file. 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(8) man page.

interactive
Allow to prompt the user. True or False. Default is True.

logtemplate
Template string for commands that print changesets.

merge
The conflict resolution program to use during a manual merge. There are some internal tools available:

internal:local
keep the local version

internal:other
use the other version

internal:merge
use the internal non–interactive merge tool

internal:fail
fail to merge
See the merge–tools section for more information on configuring tools.
patch;;
command to use to apply patches. Look for 'gpatch' or 'patch' in PATH if
unset.
quiet;;
Reduce the amount of output printed. True or False. Default is False.
remotecmd;;
remote command to use for clone/push/pull operations. Default is 'hg'.
report_untrusted;;
Warn if a .hg/hgrc file is ignored due to not being owned by a
trusted user or group. True or False. Default is True.
slash;;
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 is False.
ssh;;
command to use for SSH connections. Default is 'ssh'.
strict;;
Require exact command names, instead of allowing unambiguous
abbreviations. True or False. Default is False.
style;;
Name of style to use for command output.
timeout;;
The timeout used when a lock is held (in seconds), a negative value
means no timeout. Default is 600.
username;;
The committer of a changeset created when running "commit".
Typically a person's name and email address, e.g. "Fred Widget
<fred@example.com>". Default is $EMAIL or username@hostname.
If the username in hgrc is empty, it has to be specified manually or
in a different hgrc file (e.g. $HOME/.hgrc, if the admin set "username ="
in the system hgrc).
verbose;;
Increase the amount of output printed. True or False. Default is False.

web
Web interface configuration.

accesslog
Where to output the access log. Default is stdout.

address
Interface address to bind to. Default is all.

allow_archive
List of archive format (bz2, gz, zip) allowed for downloading. Default is empty.

allowbz2
(DEPRECATED) Whether to allow .tar.bz2 downloading of repo revisions. Default is false.

allowgz
(DEPRECATED) Whether to allow .tar.gz downloading of repo revisions. Default is false.

allowpull
Whether to allow pulling from the repository. Default is true.

allow_push
Whether to allow pushing to the repository. If empty or not set, push 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 (separated by whitespace or ","). The contents of the allow_push list are examined after the deny_push list.

allowzip
(DEPRECATED) Whether to allow .zip downloading of repo revisions. Default is false. This feature creates temporary files.

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/"

contact
Name or email address of the person in charge of the repository. Defaults to ui.username or $EMAIL or "unknown" if unset or empty.

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 (separated by whitespace or ",") is also denied. The contents of the deny_push list are examined before the allow_push list.

description
Textual description of the repository's purpose or contents. Default is "unknown".

encoding
Character encoding name. Example: "UTF–8"

errorlog
Where to output the error log. Default is stderr.

hidden
Whether to hide the repository in the hgwebdir index. Default is false.

ipv6
Whether to use IPv6. Default is false.

name
Repository name to use in the web interface. Default is current working directory.

maxchanges
Maximum number of changes to list on the changelog. Default is 10.

maxfiles
Maximum number of files to list per changeset. Default is 10.

port
Port to listen on. Default is 8000.

prefix
Prefix path to serve from. Default is '' (server root).

push_ssl
Whether to require that inbound pushes be transported over SSL to prevent password sniffing. Default is true.

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 multiline output. Default is 1; set to 0 to disable.

style
Which template map style to use.

templates
Where to find the HTML templates. Default is install path.

AUTHOR
Bryan O'Sullivan <bos@serpentine.com>.
Mercurial was written by Matt Mackall <mpm@selenic.com>.

SEE ALSO
hg(1), hgignore(8).

COPYING
This manual page is copyright 2005 Bryan O'Sullivan. Mercurial is copyright 2005–2007 Matt Mackall. Free use of this software is granted under the terms of the GNU General Public License (GPL).