Mercurial supports a functional language for selecting a set of

revisions.

The language supports a number of predicates which are joined by infix

operators. Parenthesis can be used for grouping.

Identifiers such as branch names must be quoted with single or double

quotes if they contain characters outside of

``[._a-zA-Z0-9\x80-\xff]`` or if they match one of the predefined

predicates.

Special characters can be used in quoted identifiers by escaping them,

e.g., ``\n`` is interpreted as a newline. To prevent them from being

interpreted, strings can be prefixed with ``r``, e.g. ``r'...'``.

There is a single prefix operator:

``not x``

  Changesets not in x. Short form is ``! x``.

These are the supported infix operators:

``x::y``

  A DAG range, meaning all changesets that are descendants of x and

  ancestors of y, including x and y themselves. If the first endpoint

  is left out, this is equivalent to ``ancestors(y)``, if the second

  is left out it is equivalent to ``descendants(x)``.

  An alternative syntax is ``x..y``.

``x:y``

  All changesets with revision numbers between x and y, both

  inclusive. Either endpoint can be left out, they default to 0 and

  tip.

``x and y``

  The intersection of changesets in x and y. Short form is ``x & y``.

``x or y``

  The union of changesets in x and y. There are two alternative short

  forms: ``x | y`` and ``x + y``.

``x - y``

  Changesets in x but not in y.

The following predicates are supported:

.. predicatesmarker

Command line equivalents for :hg:`log`::

  -f    ->  ::.

  -d x  ->  date(x)

  -k x  ->  keyword(x)

  -m    ->  merge()

  -u x  ->  user(x)

  -b x  ->  branch(x)

  -P x  ->  !::x

  -l x  ->  limit(expr, x)

Some sample queries:

- Changesets on the default branch::

    hg log -r "branch(default)"

- Changesets on the default branch since tag 1.5 (excluding merges)::

    hg log -r "branch(default) and 1.5:: and not merge()"

- Open branch heads::

    hg log -r "head() and not closed()"

- Changesets between tags 1.3 and 1.5 mentioning "bug" that affect

  ``hgext/*``::

    hg log -r "1.3::1.5 and keyword(bug) and file('hgext/*')"

- Changesets in committed May 2008, sorted by user::

    hg log -r "sort(date('May 2008'), user)"

- Changesets mentioning "bug" or "issue" that are not in a tagged

  release::

    hg log -r "(keyword(bug) or keyword(issue)) and not ancestors(tagged())"