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 the underlying 'git rev-list' command they use internally
19 and flags and parameters for the other commands they use
20 downstream of 'git rev-list'. This command is used to
21 distinguish between them.
27 Use 'git rev-parse' in option parsing mode (see PARSEOPT section below).
30 Only meaningful in `--parseopt` mode. Tells the option parser to echo
31 out the first `--` met instead of skipping it.
33 --stop-at-non-option::
34 Only meaningful in `--parseopt` mode. Lets the option parser stop at
35 the first non-option argument. This can be used to parse sub-commands
36 that take options themselves.
39 Use 'git rev-parse' in shell quoting mode (see SQ-QUOTE
40 section below). In contrast to the `--sq` option below, this
41 mode does only quoting. Nothing else is done to command input.
44 Do not output flags and parameters not meant for
45 'git rev-list' command.
48 Do not output flags and parameters meant for
49 'git rev-list' command.
52 Do not output non-flag parameters.
55 Do not output flag parameters.
58 If there is no parameter given by the user, use `<arg>`
62 The parameter given must be usable as a single, valid
63 object name. Otherwise barf and abort.
67 Only meaningful in `--verify` mode. Do not output an error
68 message if the first argument is not a valid object name;
69 instead exit with non-zero status silently.
72 Usually the output is made one line per flag and
73 parameter. This option makes output a single line,
74 properly quoted for consumption by shell. Useful when
75 you expect your parameter to contain whitespaces and
76 newlines (e.g. when using pickaxe `-S` with
77 'git diff-{asterisk}'). In contrast to the `--sq-quote` option,
78 the command input is still interpreted as usual.
81 When showing object names, prefix them with '{caret}' and
82 strip '{caret}' prefix from the object names that already have
86 Usually the object names are output in SHA1 form (with
87 possible '{caret}' prefix); this option makes them output in a
88 form as close to the original input as possible.
90 --symbolic-full-name::
91 This is similar to \--symbolic, but it omits input that
92 are not refs (i.e. branch or tag names; or more
93 explicitly disambiguating "heads/master" form, when you
94 want to name the "master" branch when there is an
95 unfortunately named tag "master"), and show them as full
96 refnames (e.g. "refs/heads/master").
98 --abbrev-ref[={strict|loose}]::
99 A non-ambiguous short name of the objects name.
100 The option core.warnAmbiguousRefs is used to select the strict
104 Show all refs found in `refs/`.
106 --branches[=pattern]::
108 --remotes[=pattern]::
109 Show all branches, tags, or remote-tracking branches,
110 respectively (i.e., refs found in `refs/heads`,
111 `refs/tags`, or `refs/remotes`, respectively).
113 If a `pattern` is given, only refs matching the given shell glob are
114 shown. If the pattern does not contain a globbing character (`?`,
115 `{asterisk}`, or `[`), it is turned into a prefix match by
116 appending `/{asterisk}`.
119 Show all refs matching the shell glob pattern `pattern`. If
120 the pattern does not start with `refs/`, this is automatically
121 prepended. If the pattern does not contain a globbing
122 character (`?`, `{asterisk}`, or `[`), it is turned into a prefix
123 match by appending `/{asterisk}`.
126 Show the absolute path of the top-level directory.
129 When the command is invoked from a subdirectory, show the
130 path of the current directory relative to the top-level
134 When the command is invoked from a subdirectory, show the
135 path of the top-level directory relative to the current
136 directory (typically a sequence of "../", or an empty string).
139 Show `$GIT_DIR` if defined else show the path to the .git directory.
141 --is-inside-git-dir::
142 When the current working directory is below the repository
143 directory print "true", otherwise "false".
145 --is-inside-work-tree::
146 When the current working directory is inside the work tree of the
147 repository print "true", otherwise "false".
149 --is-bare-repository::
150 When the repository is bare print "true", otherwise "false".
153 List the GIT_* environment variables that are local to the
154 repository (e.g. GIT_DIR or GIT_WORK_TREE, but not GIT_EDITOR).
155 Only the names of the variables are listed, not their value,
156 even if they are set.
160 Instead of outputting the full SHA1 values of object names try to
161 abbreviate them to a shorter unique name. When no length is specified
162 7 is used. The minimum length is 4.
166 Parse the date string, and output the corresponding
167 --max-age= parameter for 'git rev-list'.
170 --before=datestring::
171 Parse the date string, and output the corresponding
172 --min-age= parameter for 'git rev-list'.
175 Flags and parameters to be parsed.
178 include::revisions.txt[]
183 In `--parseopt` mode, 'git rev-parse' helps massaging options to bring to shell
184 scripts the same facilities C builtins have. It works as an option normalizer
185 (e.g. splits single switches aggregate values), a bit like `getopt(1)` does.
187 It takes on the standard input the specification of the options to parse and
188 understand, and echoes on the standard output a string suitable for `sh(1)` `eval`
189 to replace the arguments with normalized ones. In case of error, it outputs
190 usage on the standard error stream, and exits with code 129.
192 Note: Make sure you quote the result when passing it to `eval`. See
193 below for an example.
198 'git rev-parse --parseopt' input format is fully text based. It has two parts,
199 separated by a line that contains only `--`. The lines before the separator
200 (should be more than one) are used for the usage.
201 The lines after the separator describe the options.
203 Each line of options has this format:
206 <opt_spec><flags>* SP+ help LF
210 its format is the short option character, then the long option name
211 separated by a comma. Both parts are not required, though at least one
212 is necessary. `h,help`, `dry-run` and `f` are all three correct
216 `<flags>` are of `*`, `=`, `?` or `!`.
217 * Use `=` if the option takes an argument.
219 * Use `?` to mean that the option is optional (though its use is discouraged).
221 * Use `*` to mean that this option should not be listed in the usage
222 generated for the `-h` argument. It's shown for `--help-all` as
223 documented in linkgit:gitcli[7].
225 * Use `!` to not make the corresponding negated long option available.
227 The remainder of the line, after stripping the spaces, is used
228 as the help associated to the option.
230 Blank lines are ignored, and lines that don't match this specification are used
231 as option group headers (start the line with a space to create such
239 some-command [options] <args>...
241 some-command does foo and bar!
245 foo some nifty option --foo
246 bar= some cool option --bar with an argument
248 An option group Header
249 C? option C with an optional argument"
251 eval "$(echo "$OPTS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)"
257 In `--sq-quote` mode, 'git rev-parse' echoes on the standard output a
258 single line suitable for `sh(1)` `eval`. This line is made by
259 normalizing the arguments following `--sq-quote`. Nothing other than
260 quoting the arguments is done.
262 If you want command input to still be interpreted as usual by
263 'git rev-parse' before the output is shell quoted, see the `--sq`
270 $ cat >your-git-script.sh <<\EOF
272 args=$(git rev-parse --sq-quote "$@") # quote user-supplied arguments
273 command="git frotz -n24 $args" # and use it inside a handcrafted
278 $ sh your-git-script.sh "a b'c"
284 * Print the object name of the current commit:
287 $ git rev-parse --verify HEAD
290 * Print the commit object name from the revision in the $REV shell variable:
293 $ git rev-parse --verify $REV
296 This will error out if $REV is empty or not a valid revision.
301 $ git rev-parse --default master --verify $REV
304 but if $REV is empty, the commit object name from master will be printed.
309 Written by Linus Torvalds <torvalds@osdl.org> .
310 Junio C Hamano <gitster@pobox.com> and Pierre Habouzit <madcoder@debian.org>
314 Documentation by Junio C Hamano and the git-list <git@vger.kernel.org>.
318 Part of the linkgit:git[1] suite