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 SHA-1 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
104 --disambiguate=<prefix>::
105 Show every object whose name begins with the given prefix.
106 The <prefix> must be at least 4 hexadecimal digits long to
107 avoid listing each and every object in the repository by
111 Show all refs found in `refs/`.
113 --branches[=pattern]::
115 --remotes[=pattern]::
116 Show all branches, tags, or remote-tracking branches,
117 respectively (i.e., refs found in `refs/heads`,
118 `refs/tags`, or `refs/remotes`, respectively).
120 If a `pattern` is given, only refs matching the given shell glob are
121 shown. If the pattern does not contain a globbing character (`?`,
122 `*`, or `[`), it is turned into a prefix match by appending `/*`.
125 Show all refs matching the shell glob pattern `pattern`. If
126 the pattern does not start with `refs/`, this is automatically
127 prepended. If the pattern does not contain a globbing
128 character (`?`, `*`, or `[`), it is turned into a prefix
129 match by appending `/*`.
132 Show the absolute path of the top-level directory.
135 When the command is invoked from a subdirectory, show the
136 path of the current directory relative to the top-level
140 When the command is invoked from a subdirectory, show the
141 path of the top-level directory relative to the current
142 directory (typically a sequence of "../", or an empty string).
145 Show `$GIT_DIR` if defined. Otherwise show the path to
146 the .git directory. The path shown, when relative, is
147 relative to the current working directory.
149 If `$GIT_DIR` is not defined and the current directory
150 is not detected to lie in a Git repository or work tree
151 print a message to stderr and exit with nonzero status.
153 --is-inside-git-dir::
154 When the current working directory is below the repository
155 directory print "true", otherwise "false".
157 --is-inside-work-tree::
158 When the current working directory is inside the work tree of the
159 repository print "true", otherwise "false".
161 --is-bare-repository::
162 When the repository is bare print "true", otherwise "false".
165 List the GIT_* environment variables that are local to the
166 repository (e.g. GIT_DIR or GIT_WORK_TREE, but not GIT_EDITOR).
167 Only the names of the variables are listed, not their value,
168 even if they are set.
172 Instead of outputting the full SHA-1 values of object names try to
173 abbreviate them to a shorter unique name. When no length is specified
174 7 is used. The minimum length is 4.
178 Parse the date string, and output the corresponding
179 --max-age= parameter for 'git rev-list'.
182 --before=datestring::
183 Parse the date string, and output the corresponding
184 --min-age= parameter for 'git rev-list'.
187 Flags and parameters to be parsed.
189 --resolve-git-dir <path>::
190 Check if <path> is a valid repository or a gitfile that
191 points at a valid repository, and print the location of the
192 repository. If <path> is a gitfile then the resolved path
193 to the real repository is printed.
196 include::revisions.txt[]
201 In `--parseopt` mode, 'git rev-parse' helps massaging options to bring to shell
202 scripts the same facilities C builtins have. It works as an option normalizer
203 (e.g. splits single switches aggregate values), a bit like `getopt(1)` does.
205 It takes on the standard input the specification of the options to parse and
206 understand, and echoes on the standard output a string suitable for `sh(1)` `eval`
207 to replace the arguments with normalized ones. In case of error, it outputs
208 usage on the standard error stream, and exits with code 129.
210 Note: Make sure you quote the result when passing it to `eval`. See
211 below for an example.
216 'git rev-parse --parseopt' input format is fully text based. It has two parts,
217 separated by a line that contains only `--`. The lines before the separator
218 (should be more than one) are used for the usage.
219 The lines after the separator describe the options.
221 Each line of options has this format:
224 <opt_spec><flags>* SP+ help LF
228 its format is the short option character, then the long option name
229 separated by a comma. Both parts are not required, though at least one
230 is necessary. `h,help`, `dry-run` and `f` are all three correct
234 `<flags>` are of `*`, `=`, `?` or `!`.
235 * Use `=` if the option takes an argument.
237 * Use `?` to mean that the option is optional (though its use is discouraged).
239 * Use `*` to mean that this option should not be listed in the usage
240 generated for the `-h` argument. It's shown for `--help-all` as
241 documented in linkgit:gitcli[7].
243 * Use `!` to not make the corresponding negated long option available.
245 The remainder of the line, after stripping the spaces, is used
246 as the help associated to the option.
248 Blank lines are ignored, and lines that don't match this specification are used
249 as option group headers (start the line with a space to create such
257 some-command [options] <args>...
259 some-command does foo and bar!
263 foo some nifty option --foo
264 bar= some cool option --bar with an argument
266 An option group Header
267 C? option C with an optional argument"
269 eval "$(echo "$OPTS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)"
275 In `--sq-quote` mode, 'git rev-parse' echoes on the standard output a
276 single line suitable for `sh(1)` `eval`. This line is made by
277 normalizing the arguments following `--sq-quote`. Nothing other than
278 quoting the arguments is done.
280 If you want command input to still be interpreted as usual by
281 'git rev-parse' before the output is shell quoted, see the `--sq`
288 $ cat >your-git-script.sh <<\EOF
290 args=$(git rev-parse --sq-quote "$@") # quote user-supplied arguments
291 command="git frotz -n24 $args" # and use it inside a handcrafted
296 $ sh your-git-script.sh "a b'c"
302 * Print the object name of the current commit:
305 $ git rev-parse --verify HEAD
308 * Print the commit object name from the revision in the $REV shell variable:
311 $ git rev-parse --verify $REV
314 This will error out if $REV is empty or not a valid revision.
319 $ git rev-parse --default master --verify $REV
322 but if $REV is empty, the commit object name from master will be printed.
326 Part of the linkgit:git[1] suite