Mercurial allows you to customize output of commands through

templates. You can either pass in a template from the command

line, via the --template option, or select an existing

template-style (--style).

You can customize output for any "log-like" command: log,

outgoing, incoming, tip, parents, heads and glog.

Four styles are packaged with Mercurial: default (the style used

when no explicit preference is passed), compact, changelog,

and xml.

Usage::

    $ hg log -r1 --style changelog

A template is a piece of text, with markup to invoke variable

expansion::

    $ hg log -r1 --template "{node}\n"

    b56ce7b07c52de7d5fd79fb89701ea538af65746

Strings in curly braces are called keywords. The availability of

keywords depends on the exact context of the templater. These

keywords are usually available for templating a log-like command:

:author: String. The unmodified author of the changeset.

:branches: List of strings. The name of the branch on which the

    changeset was committed. Will be empty if the branch name was

    default.

:children: List of strings. The children of the changeset.

:date: Date information. The date when the changeset was committed.

:desc: String. The text of the changeset description.

:diffstat: String. Statistics of changes with the following format:

    "modified files: +added/-removed lines"

:files: List of strings. All files modified, added, or removed by this

    changeset.

:file_adds: List of strings. Files added by this changeset.

:file_copies: List of strings. Files copied in this changeset with

    their sources.

:file_copies_switch: List of strings. Like "file_copies" but displayed

    only if the --copied switch is set.

:file_mods: List of strings. Files modified by this changeset.

:file_dels: List of strings. Files removed by this changeset.

:node: String. The changeset identification hash, as a 40 hexadecimal

    digit string.

:parents: List of strings. The parents of the changeset.

:rev: Integer. The repository-local changeset revision number.

:tags: List of strings. Any tags associated with the changeset.

:latesttag: String. Most recent global tag in the ancestors of this

    changeset.

:latesttagdistance: Integer. Longest path to the latest tag.

The "date" keyword does not produce human-readable output. If you

want to use a date in your output, you can use a filter to process

it. Filters are functions which return a string based on the input

variable. Be sure to use the stringify filter first when you're

applying a string-input filter to a list-like input variable.

You can also use a chain of filters to get the desired output::

   $ hg tip --template "{date|isodate}\n"

   2008-08-21 18:22 +0000

List of filters:

:addbreaks: Any text. Add an XHTML "<br />" tag before the end of

    every line except the last.

:age: Date. Returns a human-readable date/time difference between the

    given date/time and the current date/time.

:basename: Any text. Treats the text as a path, and returns the last

    component of the path after splitting by the path separator

    (ignoring trailing separators). For example, "foo/bar/baz" becomes

    "baz" and "foo/bar//" becomes "bar".

:stripdir: Treat the text as path and strip a directory level, if

    possible. For example, "foo" and "foo/bar" becomes "foo".

:date: Date. Returns a date in a Unix date format, including the

    timezone: "Mon Sep 04 15:13:13 2006 0700".

:domain: Any text. Finds the first string that looks like an email

    address, and extracts just the domain component. Example: ``User

    <user@example.com>`` becomes ``example.com``.

:email: Any text. Extracts the first string that looks like an email

    address. Example: ``User <user@example.com>`` becomes

    ``user@example.com``.

:escape: Any text. Replaces the special XML/XHTML characters "&", "<"

    and ">" with XML entities.

:hex: Any text. Convert a binary Mercurial node identifier into

    its long hexadecimal representation.

:fill68: Any text. Wraps the text to fit in 68 columns.

:fill76: Any text. Wraps the text to fit in 76 columns.

:firstline: Any text. Returns the first line of text.

:nonempty: Any text. Returns '(none)' if the string is empty.

:hgdate: Date. Returns the date as a pair of numbers: "1157407993

    25200" (Unix timestamp, timezone offset).

:isodate: Date. Returns the date in ISO 8601 format: "2009-08-18 13:00

    +0200".

:isodatesec: Date. Returns the date in ISO 8601 format, including

    seconds: "2009-08-18 13:00:13 +0200". See also the rfc3339date

    filter.

:localdate: Date. Converts a date to local date.

:obfuscate: Any text. Returns the input text rendered as a sequence of

    XML entities.

:person: Any text. Returns the text before an email address.

:rfc822date: Date. Returns a date using the same format used in email

    headers: "Tue, 18 Aug 2009 13:00:13 +0200".

:rfc3339date: Date. Returns a date using the Internet date format

    specified in RFC 3339: "2009-08-18T13:00:13+02:00".

:short: Changeset hash. Returns the short form of a changeset hash,

    i.e. a 12 hexadecimal digit string.

:shortdate: Date. Returns a date like "2006-09-18".

:stringify: Any type. Turns the value into text by converting values into

    text and concatenating them.

:strip: Any text. Strips all leading and trailing whitespace.

:tabindent: Any text. Returns the text, with every line except the

     first starting with a tab character.

:urlescape: Any text. Escapes all "special" characters. For example,

    "foo bar" becomes "foo%20bar".

:user: Any text. Returns the user portion of an email address.