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Mercurial supports a functional language for selecting a set of
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revisions.
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The language supports a number of predicates which are joined by infix
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operators. Parenthesis can be used for grouping.
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Identifiers such as branch names must be quoted with single or double
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quotes if they contain characters outside of
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``[._a-zA-Z0-9\x80-\xff]`` or if they match one of the predefined
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predicates.
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Special characters can be used in quoted identifiers by escaping them,
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e.g., ``\n`` is interpreted as a newline. To prevent them from being
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interpreted, strings can be prefixed with ``r``, e.g. ``r'...'``.
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There is a single prefix operator:
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``not x``
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Changesets not in x. Short form is ``! x``.
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These are the supported infix operators:
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``x::y``
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A DAG range, meaning all changesets that are descendants of x and
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ancestors of y, including x and y themselves. If the first endpoint
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is left out, this is equivalent to ``ancestors(y)``, if the second
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is left out it is equivalent to ``descendants(x)``.
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An alternative syntax is ``x..y``.
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``x:y``
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All changesets with revision numbers between x and y, both
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inclusive. Either endpoint can be left out, they default to 0 and
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tip.
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``x and y``
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The intersection of changesets in x and y. Short form is ``x & y``.
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``x or y``
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The union of changesets in x and y. There are two alternative short
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forms: ``x | y`` and ``x + y``.
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``x - y``
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Changesets in x but not in y.
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``x^n``
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The nth parent of x, n == 0, 1, or 2.
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For n == 0, x; for n == 1, the first parent of each changeset in x;
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for n == 2, the second parent of changeset in x.
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``x~n``
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The nth first ancestor of x; ``x~0`` is x; ``x~3`` is ``x^^^``.
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There is a single postfix operator:
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``x^``
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Equivalent to ``x^1``, the first parent of each changeset in x.
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The following predicates are supported:
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.. predicatesmarker
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Command line equivalents for :hg:`log`::
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-f -> ::.
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-d x -> date(x)
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-k x -> keyword(x)
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-m -> merge()
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-u x -> user(x)
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-b x -> branch(x)
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-P x -> !::x
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-l x -> limit(expr, x)
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Some sample queries:
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- Changesets on the default branch::
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hg log -r "branch(default)"
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- Changesets on the default branch since tag 1.5 (excluding merges)::
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hg log -r "branch(default) and 1.5:: and not merge()"
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- Open branch heads::
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hg log -r "head() and not closed()"
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- Changesets between tags 1.3 and 1.5 mentioning "bug" that affect
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``hgext/*``::
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hg log -r "1.3::1.5 and keyword(bug) and file('hgext/*')"
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- Changesets committed in May 2008, sorted by user::
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hg log -r "sort(date('May 2008'), user)"
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- Changesets mentioning "bug" or "issue" that are not in a tagged
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release::
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hg log -r "(keyword(bug) or keyword(issue)) and not ancestors(tagged())"
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