1 git-rev-parse(1)
2 ================
4 NAME
5 ----
6 git-rev-parse - Pick out and massage parameters
9 SYNOPSIS
10 --------
11 [verse]
12 'git rev-parse' [ --option ] <args>...
14 DESCRIPTION
15 -----------
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.
25 OPTIONS
26 -------
27 --parseopt::
28 Use 'git rev-parse' in option parsing mode (see PARSEOPT section below).
30 --keep-dashdash::
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.
39 --sq-quote::
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.
44 --revs-only::
45 Do not output flags and parameters not meant for
46 'git rev-list' command.
48 --no-revs::
49 Do not output flags and parameters meant for
50 'git rev-list' command.
52 --flags::
53 Do not output non-flag parameters.
55 --no-flags::
56 Do not output flag parameters.
58 --default <arg>::
59 If there is no parameter given by the user, use `<arg>`
60 instead.
62 --verify::
63 The parameter given must be usable as a single, valid
64 object name. Otherwise barf and abort.
66 -q::
67 --quiet::
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.
72 --sq::
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.
81 --not::
82 When showing object names, prefix them with '{caret}' and
83 strip '{caret}' prefix from the object names that already have
84 one.
86 --symbolic::
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
102 abbreviation mode.
104 --all::
105 Show all refs found in `refs/`.
107 --branches[=pattern]::
108 --tags[=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).
113 +
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 `{asterisk}`, or `[`), it is turned into a prefix match by
117 appending `/{asterisk}`.
119 --glob=pattern::
120 Show all refs matching the shell glob pattern `pattern`. If
121 the pattern does not start with `refs/`, this is automatically
122 prepended. If the pattern does not contain a globbing
123 character (`?`, `{asterisk}`, or `[`), it is turned into a prefix
124 match by appending `/{asterisk}`.
126 --show-toplevel::
127 Show the absolute path of the top-level directory.
129 --show-prefix::
130 When the command is invoked from a subdirectory, show the
131 path of the current directory relative to the top-level
132 directory.
134 --show-cdup::
135 When the command is invoked from a subdirectory, show the
136 path of the top-level directory relative to the current
137 directory (typically a sequence of "../", or an empty string).
139 --git-dir::
140 Show `$GIT_DIR` if defined. Otherwise show the path to
141 the .git directory, relative to the current directory.
142 +
143 If `$GIT_DIR` is not defined and the current directory
144 is not detected to lie in a git repository or work tree
145 print a message to stderr and exit with nonzero status.
147 --is-inside-git-dir::
148 When the current working directory is below the repository
149 directory print "true", otherwise "false".
151 --is-inside-work-tree::
152 When the current working directory is inside the work tree of the
153 repository print "true", otherwise "false".
155 --is-bare-repository::
156 When the repository is bare print "true", otherwise "false".
158 --local-env-vars::
159 List the GIT_* environment variables that are local to the
160 repository (e.g. GIT_DIR or GIT_WORK_TREE, but not GIT_EDITOR).
161 Only the names of the variables are listed, not their value,
162 even if they are set.
164 --short::
165 --short=number::
166 Instead of outputting the full SHA1 values of object names try to
167 abbreviate them to a shorter unique name. When no length is specified
168 7 is used. The minimum length is 4.
170 --since=datestring::
171 --after=datestring::
172 Parse the date string, and output the corresponding
173 --max-age= parameter for 'git rev-list'.
175 --until=datestring::
176 --before=datestring::
177 Parse the date string, and output the corresponding
178 --min-age= parameter for 'git rev-list'.
180 <args>...::
181 Flags and parameters to be parsed.
183 --resolve-git-dir <path>::
184 Check if <path> is a valid git-dir or a git-file pointing to a valid
185 git-dir. If <path> is a valid git-dir the resolved path to git-dir will
186 be printed.
188 include::revisions.txt[]
190 PARSEOPT
191 --------
193 In `--parseopt` mode, 'git rev-parse' helps massaging options to bring to shell
194 scripts the same facilities C builtins have. It works as an option normalizer
195 (e.g. splits single switches aggregate values), a bit like `getopt(1)` does.
197 It takes on the standard input the specification of the options to parse and
198 understand, and echoes on the standard output a string suitable for `sh(1)` `eval`
199 to replace the arguments with normalized ones. In case of error, it outputs
200 usage on the standard error stream, and exits with code 129.
202 Note: Make sure you quote the result when passing it to `eval`. See
203 below for an example.
205 Input Format
206 ~~~~~~~~~~~~
208 'git rev-parse --parseopt' input format is fully text based. It has two parts,
209 separated by a line that contains only `--`. The lines before the separator
210 (should be more than one) are used for the usage.
211 The lines after the separator describe the options.
213 Each line of options has this format:
215 ------------
216 <opt_spec><flags>* SP+ help LF
217 ------------
219 `<opt_spec>`::
220 its format is the short option character, then the long option name
221 separated by a comma. Both parts are not required, though at least one
222 is necessary. `h,help`, `dry-run` and `f` are all three correct
223 `<opt_spec>`.
225 `<flags>`::
226 `<flags>` are of `*`, `=`, `?` or `!`.
227 * Use `=` if the option takes an argument.
229 * Use `?` to mean that the option is optional (though its use is discouraged).
231 * Use `*` to mean that this option should not be listed in the usage
232 generated for the `-h` argument. It's shown for `--help-all` as
233 documented in linkgit:gitcli[7].
235 * Use `!` to not make the corresponding negated long option available.
237 The remainder of the line, after stripping the spaces, is used
238 as the help associated to the option.
240 Blank lines are ignored, and lines that don't match this specification are used
241 as option group headers (start the line with a space to create such
242 lines on purpose).
244 Example
245 ~~~~~~~
247 ------------
248 OPTS_SPEC="\
249 some-command [options] <args>...
251 some-command does foo and bar!
252 --
253 h,help show the help
255 foo some nifty option --foo
256 bar= some cool option --bar with an argument
258 An option group Header
259 C? option C with an optional argument"
261 eval "$(echo "$OPTS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)"
262 ------------
264 SQ-QUOTE
265 --------
267 In `--sq-quote` mode, 'git rev-parse' echoes on the standard output a
268 single line suitable for `sh(1)` `eval`. This line is made by
269 normalizing the arguments following `--sq-quote`. Nothing other than
270 quoting the arguments is done.
272 If you want command input to still be interpreted as usual by
273 'git rev-parse' before the output is shell quoted, see the `--sq`
274 option.
276 Example
277 ~~~~~~~
279 ------------
280 $ cat >your-git-script.sh <<\EOF
281 #!/bin/sh
282 args=$(git rev-parse --sq-quote "$@") # quote user-supplied arguments
283 command="git frotz -n24 $args" # and use it inside a handcrafted
284 # command line
285 eval "$command"
286 EOF
288 $ sh your-git-script.sh "a b'c"
289 ------------
291 EXAMPLES
292 --------
294 * Print the object name of the current commit:
295 +
296 ------------
297 $ git rev-parse --verify HEAD
298 ------------
300 * Print the commit object name from the revision in the $REV shell variable:
301 +
302 ------------
303 $ git rev-parse --verify $REV
304 ------------
305 +
306 This will error out if $REV is empty or not a valid revision.
308 * Same as above:
309 +
310 ------------
311 $ git rev-parse --default master --verify $REV
312 ------------
313 +
314 but if $REV is empty, the commit object name from master will be printed.
316 GIT
317 ---
318 Part of the linkgit:git[1] suite