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Target pattern syntax
=====================
The BUILD file label syntax is used to specify a single target. Target
patterns generalize this syntax to sets of targets, and also support
working-directory-relative forms, recursion, subtraction and filtering.
Examples:
Specifying a single target:
//foo/bar:wiz The single target '//foo/bar:wiz'.
foo/bar/wiz Equivalent to the first existing one of these:
//foo/bar:wiz
//foo:bar/wiz
//foo/bar Equivalent to '//foo/bar:bar'.
Specifying all rules in a package:
//foo/bar:all Matches all rules in package 'foo/bar'.
Specifying all rules recursively beneath a package:
//foo/...:all Matches all rules in all packages beneath directory 'foo'.
//foo/... (ditto)
Working-directory relative forms: (assume cwd = 'workspace/foo')
Target patterns which do not begin with '//' are taken relative to
the working directory. Patterns which begin with '//' are always
absolute.
...:all Equivalent to '//foo/...:all'.
... (ditto)
bar/...:all Equivalent to '//foo/bar/...:all'.
bar/... (ditto)
bar:wiz Equivalent to '//foo/bar:wiz'.
:foo Equivalent to '//foo:foo'.
bar:all Equivalent to '//foo/bar:all'.
:all Equivalent to '//foo:all'.
Summary of target wildcards:
:all, Match all rules in the specified packages.
:*, :all-targets Match all targets (rules and files) in the specified
packages, including .par and _deploy.jar files.
Subtractive patterns:
Target patterns may be preceded by '-', meaning they should be
subtracted from the set of targets accumulated by preceding
patterns. For example:
% blaze build -- foo/... -foo/contrib/...
builds everything in 'foo', except 'contrib'. In case a target not
under 'contrib' depends on something under 'contrib' though, in order to
build the former blaze has to build the latter too. As usual, the '--' is
required to prevent '-b' from being interpreted as an option.
%{options}
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