1git-rev-parse(1) 2================ 3 4NAME 5---- 6git-rev-parse - Pick out and massage parameters 7 8 9SYNOPSIS 10-------- 11'git rev-parse' [ --option ] <args>... 12 13DESCRIPTION 14----------- 15 16Many git porcelainish commands take mixture of flags 17(i.e. parameters that begin with a dash '-') and parameters 18meant for the underlying 'git rev-list' command they use internally 19and flags and parameters for the other commands they use 20downstream of 'git rev-list'. This command is used to 21distinguish between them. 22 23 24OPTIONS 25------- 26--parseopt:: 27 Use 'git rev-parse' in option parsing mode (see PARSEOPT section below). 28 29--keep-dashdash:: 30 Only meaningful in `--parseopt` mode. Tells the option parser to echo 31 out the first `--` met instead of skipping it. 32 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. 37 38--sq-quote:: 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. 42 43--revs-only:: 44 Do not output flags and parameters not meant for 45 'git rev-list' command. 46 47--no-revs:: 48 Do not output flags and parameters meant for 49 'git rev-list' command. 50 51--flags:: 52 Do not output non-flag parameters. 53 54--no-flags:: 55 Do not output flag parameters. 56 57--default <arg>:: 58 If there is no parameter given by the user, use `<arg>` 59 instead. 60 61--verify:: 62 The parameter given must be usable as a single, valid 63 object name. Otherwise barf and abort. 64 65-q:: 66--quiet:: 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. 70 71--sq:: 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. 79 80--not:: 81 When showing object names, prefix them with '{caret}' and 82 strip '{caret}' prefix from the object names that already have 83 one. 84 85--symbolic:: 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. 89 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"). 97 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 101 abbreviation mode. 102 103--all:: 104 Show all refs found in `refs/`. 105 106--branches[=pattern]:: 107--tags[=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). 112+ 113If a `pattern` is given, only refs matching the given shell glob are 114shown. If the pattern does not contain a globbing character (`?`, 115`{asterisk}`, or `[`), it is turned into a prefix match by 116appending `/{asterisk}`. 117 118--glob=pattern:: 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}`. 124 125--show-toplevel:: 126 Show the absolute path of the top-level directory. 127 128--show-prefix:: 129 When the command is invoked from a subdirectory, show the 130 path of the current directory relative to the top-level 131 directory. 132 133--show-cdup:: 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). 137 138--git-dir:: 139 Show `$GIT_DIR` if defined else show the path to the .git directory. 140 141--is-inside-git-dir:: 142 When the current working directory is below the repository 143 directory print "true", otherwise "false". 144 145--is-inside-work-tree:: 146 When the current working directory is inside the work tree of the 147 repository print "true", otherwise "false". 148 149--is-bare-repository:: 150 When the repository is bare print "true", otherwise "false". 151 152--local-env-vars:: 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. 157 158--short:: 159--short=number:: 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. 163 164--since=datestring:: 165--after=datestring:: 166 Parse the date string, and output the corresponding 167 --max-age= parameter for 'git rev-list'. 168 169--until=datestring:: 170--before=datestring:: 171 Parse the date string, and output the corresponding 172 --min-age= parameter for 'git rev-list'. 173 174<args>...:: 175 Flags and parameters to be parsed. 176 177 178include::revisions.txt[] 179 180PARSEOPT 181-------- 182 183In `--parseopt` mode, 'git rev-parse' helps massaging options to bring to shell 184scripts 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. 186 187It takes on the standard input the specification of the options to parse and 188understand, and echoes on the standard output a string suitable for `sh(1)` `eval` 189to replace the arguments with normalized ones. In case of error, it outputs 190usage on the standard error stream, and exits with code 129. 191 192Note: Make sure you quote the result when passing it to `eval`. See 193below for an example. 194 195Input Format 196~~~~~~~~~~~~ 197 198'git rev-parse --parseopt' input format is fully text based. It has two parts, 199separated by a line that contains only `--`. The lines before the separator 200(should be more than one) are used for the usage. 201The lines after the separator describe the options. 202 203Each line of options has this format: 204 205------------ 206<opt_spec><flags>* SP+ help LF 207------------ 208 209`<opt_spec>`:: 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 213 `<opt_spec>`. 214 215`<flags>`:: 216 `<flags>` are of `*`, `=`, `?` or `!`. 217 * Use `=` if the option takes an argument. 218 219 * Use `?` to mean that the option is optional (though its use is discouraged). 220 221 * 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]. 224 225 * Use `!` to not make the corresponding negated long option available. 226 227The remainder of the line, after stripping the spaces, is used 228as the help associated to the option. 229 230Blank lines are ignored, and lines that don't match this specification are used 231as option group headers (start the line with a space to create such 232lines on purpose). 233 234Example 235~~~~~~~ 236 237------------ 238OPTS_SPEC="\ 239some-command [options] <args>... 240 241some-command does foo and bar! 242-- 243h,help show the help 244 245foo some nifty option --foo 246bar= some cool option --bar with an argument 247 248 An option group Header 249C? option C with an optional argument" 250 251eval "$(echo "$OPTS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)" 252------------ 253 254SQ-QUOTE 255-------- 256 257In `--sq-quote` mode, 'git rev-parse' echoes on the standard output a 258single line suitable for `sh(1)` `eval`. This line is made by 259normalizing the arguments following `--sq-quote`. Nothing other than 260quoting the arguments is done. 261 262If you want command input to still be interpreted as usual by 263'git rev-parse' before the output is shell quoted, see the `--sq` 264option. 265 266Example 267~~~~~~~ 268 269------------ 270$ cat >your-git-script.sh <<\EOF 271#!/bin/sh 272args=$(git rev-parse --sq-quote "$@") # quote user-supplied arguments 273command="git frotz -n24 $args" # and use it inside a handcrafted 274 # command line 275eval "$command" 276EOF 277 278$ sh your-git-script.sh "a b'c" 279------------ 280 281EXAMPLES 282-------- 283 284* Print the object name of the current commit: 285+ 286------------ 287$ git rev-parse --verify HEAD 288------------ 289 290* Print the commit object name from the revision in the $REV shell variable: 291+ 292------------ 293$ git rev-parse --verify $REV 294------------ 295+ 296This will error out if $REV is empty or not a valid revision. 297 298* Same as above: 299+ 300------------ 301$ git rev-parse --default master --verify $REV 302------------ 303+ 304but if $REV is empty, the commit object name from master will be printed. 305 306 307Author 308------ 309Written by Linus Torvalds <torvalds@osdl.org> . 310Junio C Hamano <gitster@pobox.com> and Pierre Habouzit <madcoder@debian.org> 311 312Documentation 313-------------- 314Documentation by Junio C Hamano and the git-list <git@vger.kernel.org>. 315 316GIT 317--- 318Part of the linkgit:git[1] suite