6 git-rev-parse - Pick out and massage parameters
12 'git rev-parse' [ --option ] <args>...
17 Many git porcelainish commands take mixture of flags
18 (i.e. parameters that begin with a dash '-') and parameters
19 meant for the underlying 'git rev-list' command they use internally
20 and flags and parameters for the other commands they use
21 downstream of 'git rev-list'. This command is used to
22 distinguish between them.
28 Use 'git rev-parse' in option parsing mode (see PARSEOPT section below).
31 Only meaningful in `--parseopt` mode. Tells the option parser to echo
32 out the first `--` met instead of skipping it.
34 --stop-at-non-option::
35 Only meaningful in `--parseopt` mode. Lets the option parser stop at
36 the first non-option argument. This can be used to parse sub-commands
37 that take options themselves.
40 Use 'git rev-parse' in shell quoting mode (see SQ-QUOTE
41 section below). In contrast to the `--sq` option below, this
42 mode does only quoting. Nothing else is done to command input.
45 Do not output flags and parameters not meant for
46 'git rev-list' command.
49 Do not output flags and parameters meant for
50 'git rev-list' command.
53 Do not output non-flag parameters.
56 Do not output flag parameters.
59 If there is no parameter given by the user, use `<arg>`
63 The parameter given must be usable as a single, valid
64 object name. Otherwise barf and abort.
68 Only meaningful in `--verify` mode. Do not output an error
69 message if the first argument is not a valid object name;
70 instead exit with non-zero status silently.
73 Usually the output is made one line per flag and
74 parameter. This option makes output a single line,
75 properly quoted for consumption by shell. Useful when
76 you expect your parameter to contain whitespaces and
77 newlines (e.g. when using pickaxe `-S` with
78 'git diff-{asterisk}'). In contrast to the `--sq-quote` option,
79 the command input is still interpreted as usual.
82 When showing object names, prefix them with '{caret}' and
83 strip '{caret}' prefix from the object names that already have
87 Usually the object names are output in SHA1 form (with
88 possible '{caret}' prefix); this option makes them output in a
89 form as close to the original input as possible.
91 --symbolic-full-name::
92 This is similar to \--symbolic, but it omits input that
93 are not refs (i.e. branch or tag names; or more
94 explicitly disambiguating "heads/master" form, when you
95 want to name the "master" branch when there is an
96 unfortunately named tag "master"), and show them as full
97 refnames (e.g. "refs/heads/master").
99 --abbrev-ref[=(strict|loose)]::
100 A non-ambiguous short name of the objects name.
101 The option core.warnAmbiguousRefs is used to select the strict
105 Show all refs found in `refs/`.
107 --branches[=pattern]::
109 --remotes[=pattern]::
110 Show all branches, tags, or remote-tracking branches,
111 respectively (i.e., refs found in `refs/heads`,
112 `refs/tags`, or `refs/remotes`, respectively).
114 If a `pattern` is given, only refs matching the given shell glob are
115 shown. If the pattern does not contain a globbing character (`?`,
116 `*`, or `[`), it is turned into a prefix match by appending `/*`.
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 (`?`, `*`, or `[`), it is turned into a prefix
123 match by appending `/*`.
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 `$GIT_DIR` if defined. Otherwise show the path to
140 the .git directory, relative to the current directory.
142 If `$GIT_DIR` is not defined and the current directory
143 is not detected to lie in a git repository or work tree
144 print a message to stderr and exit with nonzero status.
146 --is-inside-git-dir::
147 When the current working directory is below the repository
148 directory print "true", otherwise "false".
150 --is-inside-work-tree::
151 When the current working directory is inside the work tree of the
152 repository print "true", otherwise "false".
154 --is-bare-repository::
155 When the repository is bare print "true", otherwise "false".
158 List the GIT_* environment variables that are local to the
159 repository (e.g. GIT_DIR or GIT_WORK_TREE, but not GIT_EDITOR).
160 Only the names of the variables are listed, not their value,
161 even if they are set.
165 Instead of outputting the full SHA1 values of object names try to
166 abbreviate them to a shorter unique name. When no length is specified
167 7 is used. The minimum length is 4.
171 Parse the date string, and output the corresponding
172 --max-age= parameter for 'git rev-list'.
175 --before=datestring::
176 Parse the date string, and output the corresponding
177 --min-age= parameter for 'git rev-list'.
180 Flags and parameters to be parsed.
182 --resolve-git-dir <path>::
183 Check if <path> is a valid git-dir or a git-file pointing to a valid
184 git-dir. If <path> is a valid git-dir the resolved path to git-dir will
187 include::revisions.txt[]
192 In `--parseopt` mode, 'git rev-parse' helps massaging options to bring to shell
193 scripts the same facilities C builtins have. It works as an option normalizer
194 (e.g. splits single switches aggregate values), a bit like `getopt(1)` does.
196 It takes on the standard input the specification of the options to parse and
197 understand, and echoes on the standard output a string suitable for `sh(1)` `eval`
198 to replace the arguments with normalized ones. In case of error, it outputs
199 usage on the standard error stream, and exits with code 129.
201 Note: Make sure you quote the result when passing it to `eval`. See
202 below for an example.
207 'git rev-parse --parseopt' input format is fully text based. It has two parts,
208 separated by a line that contains only `--`. The lines before the separator
209 (should be more than one) are used for the usage.
210 The lines after the separator describe the options.
212 Each line of options has this format:
215 <opt_spec><flags>* SP+ help LF
219 its format is the short option character, then the long option name
220 separated by a comma. Both parts are not required, though at least one
221 is necessary. `h,help`, `dry-run` and `f` are all three correct
225 `<flags>` are of `*`, `=`, `?` or `!`.
226 * Use `=` if the option takes an argument.
228 * Use `?` to mean that the option is optional (though its use is discouraged).
230 * Use `*` to mean that this option should not be listed in the usage
231 generated for the `-h` argument. It's shown for `--help-all` as
232 documented in linkgit:gitcli[7].
234 * Use `!` to not make the corresponding negated long option available.
236 The remainder of the line, after stripping the spaces, is used
237 as the help associated to the option.
239 Blank lines are ignored, and lines that don't match this specification are used
240 as option group headers (start the line with a space to create such
248 some-command [options] <args>...
250 some-command does foo and bar!
254 foo some nifty option --foo
255 bar= some cool option --bar with an argument
257 An option group Header
258 C? option C with an optional argument"
260 eval "$(echo "$OPTS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)"
266 In `--sq-quote` mode, 'git rev-parse' echoes on the standard output a
267 single line suitable for `sh(1)` `eval`. This line is made by
268 normalizing the arguments following `--sq-quote`. Nothing other than
269 quoting the arguments is done.
271 If you want command input to still be interpreted as usual by
272 'git rev-parse' before the output is shell quoted, see the `--sq`
279 $ cat >your-git-script.sh <<\EOF
281 args=$(git rev-parse --sq-quote "$@") # quote user-supplied arguments
282 command="git frotz -n24 $args" # and use it inside a handcrafted
287 $ sh your-git-script.sh "a b'c"
293 * Print the object name of the current commit:
296 $ git rev-parse --verify HEAD
299 * Print the commit object name from the revision in the $REV shell variable:
302 $ git rev-parse --verify $REV
305 This will error out if $REV is empty or not a valid revision.
310 $ git rev-parse --default master --verify $REV
313 but if $REV is empty, the commit object name from master will be printed.
317 Part of the linkgit:git[1] suite