6 git-rev-parse - Pick out and massage parameters.
11 'git-rev-parse' [ --option ] <args>...
16 Many git Porcelainish commands take mixture of flags
17 (i.e. parameters that begin with a dash '-') and parameters
18 meant for underlying `git-rev-list` command they use internally
19 and flags and parameters for other commands they use as the
20 downstream of `git-rev-list`. This command is used to
21 distinguish between them.
27 Do not output flags and parameters not meant for
28 `git-rev-list` command.
31 Do not output flags and parameters meant for
32 `git-rev-list` command.
35 Do not output non-flag parameters.
38 Do not output flag parameters.
41 If there is no parameter given by the user, use `<arg>`
45 The parameter given must be usable as a single, valid
46 object name. Otherwise barf and abort.
49 Usually the output is made one line per flag and
50 parameter. This option makes output a single line,
51 properly quoted for consumption by shell. Useful when
52 you expect your parameter to contain whitespaces and
53 newlines (e.g. when using pickaxe `-S` with
57 When showing object names, prefix them with '{caret}' and
58 strip '{caret}' prefix from the object names that already have
62 Usually the object names are output in SHA1 form (with
63 possible '{caret}' prefix); this option makes them output in a
64 form as close to the original input as possible.
68 Show all refs found in `$GIT_DIR/refs`.
71 When the command is invoked from a directory show the
72 path of the current directory relative to the top-level
76 Flags and parameters to be parsed.
82 A revision parameter typically names a commit object. They use
83 what is called an 'extended SHA1' syntax.
85 * The full SHA1 object name (40-byte hexadecimal string), or
86 a substring of such that is unique within the repository.
87 E.g. dae86e1950b1277e545cee180551750029cfe735 and dae86e both
88 name the same commit object if there are no other object in
89 your repository whose object name starts with dae86e.
91 * A symbolic ref name. E.g. 'master' typically means the commit
92 object referenced by $GIT_DIR/refs/heads/master. If you
93 happen to have both heads/master and tags/master, you can
94 explicitly say 'heads/master' to tell GIT which one you mean.
96 * A suffix '{caret}' to a revision parameter means the first parent of
97 that commit object. '{caret}<n>' means the <n>th parent (i.e.
99 is equivalent to 'rev{caret}1'). As a special rule,
100 'rev{caret}0' means the commit itself and is used when 'rev' is the
101 object name of a tag object that refers to a commit object.
103 * A suffix '~<n>' to a revision parameter means the commit
104 object that is the <n>th generation grand-parent of the named
105 commit object, following only the first parent. I.e. rev~3 is
106 equivalent to rev{caret}{caret}{caret} which is equivalent to\
107 rev{caret}1{caret}1{caret}1.
109 'git-rev-parse' also accepts a prefix '{caret}' to revision parameter,
110 which is passed to 'git-rev-list'. Two revision parameters
111 concatenated with '..' is a short-hand for writing a range
112 between them. I.e. 'r1..r2' is equivalent to saying '{caret}r1 r2'
117 Written by Linus Torvalds <torvalds@osdl.org> and
118 Junio C Hamano <junkio@cox.net>
122 Documentation by Junio C Hamano and the git-list <git@vger.kernel.org>.
126 Part of the gitlink:git[7] suite