1git-rev-parse(1) 2================ 3 4NAME 5---- 6git-rev-parse - Pick out and massage parameters 7 8 9SYNOPSIS 10-------- 11[verse] 12'git rev-parse' [ --option ] <args>... 13 14DESCRIPTION 15----------- 16 17Many git porcelainish commands take mixture of flags 18(i.e. parameters that begin with a dash '-') and parameters 19meant for the underlying 'git rev-list' command they use internally 20and flags and parameters for the other commands they use 21downstream of 'git rev-list'. This command is used to 22distinguish between them. 23 24 25OPTIONS 26------- 27--parseopt:: 28 Use 'git rev-parse' in option parsing mode (see PARSEOPT section below). 29 30--keep-dashdash:: 31 Only meaningful in `--parseopt` mode. Tells the option parser to echo 32 out the first `--` met instead of skipping it. 33 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. 38 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. 43 44--revs-only:: 45 Do not output flags and parameters not meant for 46 'git rev-list' command. 47 48--no-revs:: 49 Do not output flags and parameters meant for 50 'git rev-list' command. 51 52--flags:: 53 Do not output non-flag parameters. 54 55--no-flags:: 56 Do not output flag parameters. 57 58--default <arg>:: 59 If there is no parameter given by the user, use `<arg>` 60 instead. 61 62--verify:: 63 The parameter given must be usable as a single, valid 64 object name. Otherwise barf and abort. 65 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. 71 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. 80 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. 85 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. 90 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"). 98 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. 103 104--all:: 105 Show all refs found in `refs/`. 106 107--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+ 114If a `pattern` is given, only refs matching the given shell glob are 115shown. If the pattern does not contain a globbing character (`?`, 116`{asterisk}`, or `[`), it is turned into a prefix match by 117appending `/{asterisk}`. 118 119--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}`. 125 126--show-toplevel:: 127 Show the absolute path of the top-level directory. 128 129--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. 133 134--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). 138 139--git-dir:: 140 Show `$GIT_DIR` if defined. Otherwise show the path to 141 the .git directory, relative to the current directory. 142+ 143If `$GIT_DIR` is not defined and the current directory 144is not detected to lie in a git repository or work tree 145print a message to stderr and exit with nonzero status. 146 147--is-inside-git-dir:: 148 When the current working directory is below the repository 149 directory print "true", otherwise "false". 150 151--is-inside-work-tree:: 152 When the current working directory is inside the work tree of the 153 repository print "true", otherwise "false". 154 155--is-bare-repository:: 156 When the repository is bare print "true", otherwise "false". 157 158--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. 163 164--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. 169 170--since=datestring:: 171--after=datestring:: 172 Parse the date string, and output the corresponding 173 --max-age= parameter for 'git rev-list'. 174 175--until=datestring:: 176--before=datestring:: 177 Parse the date string, and output the corresponding 178 --min-age= parameter for 'git rev-list'. 179 180<args>...:: 181 Flags and parameters to be parsed. 182 183--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. 187 188include::revisions.txt[] 189 190PARSEOPT 191-------- 192 193In `--parseopt` mode, 'git rev-parse' helps massaging options to bring to shell 194scripts 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. 196 197It takes on the standard input the specification of the options to parse and 198understand, and echoes on the standard output a string suitable for `sh(1)` `eval` 199to replace the arguments with normalized ones. In case of error, it outputs 200usage on the standard error stream, and exits with code 129. 201 202Note: Make sure you quote the result when passing it to `eval`. See 203below for an example. 204 205Input Format 206~~~~~~~~~~~~ 207 208'git rev-parse --parseopt' input format is fully text based. It has two parts, 209separated by a line that contains only `--`. The lines before the separator 210(should be more than one) are used for the usage. 211The lines after the separator describe the options. 212 213Each line of options has this format: 214 215------------ 216<opt_spec><flags>* SP+ help LF 217------------ 218 219`<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>`. 224 225`<flags>`:: 226 `<flags>` are of `*`, `=`, `?` or `!`. 227 * Use `=` if the option takes an argument. 228 229 * Use `?` to mean that the option is optional (though its use is discouraged). 230 231 * 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]. 234 235 * Use `!` to not make the corresponding negated long option available. 236 237The remainder of the line, after stripping the spaces, is used 238as the help associated to the option. 239 240Blank lines are ignored, and lines that don't match this specification are used 241as option group headers (start the line with a space to create such 242lines on purpose). 243 244Example 245~~~~~~~ 246 247------------ 248OPTS_SPEC="\ 249some-command [options] <args>... 250 251some-command does foo and bar! 252-- 253h,help show the help 254 255foo some nifty option --foo 256bar= some cool option --bar with an argument 257 258 An option group Header 259C? option C with an optional argument" 260 261eval "$(echo "$OPTS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)" 262------------ 263 264SQ-QUOTE 265-------- 266 267In `--sq-quote` mode, 'git rev-parse' echoes on the standard output a 268single line suitable for `sh(1)` `eval`. This line is made by 269normalizing the arguments following `--sq-quote`. Nothing other than 270quoting the arguments is done. 271 272If you want command input to still be interpreted as usual by 273'git rev-parse' before the output is shell quoted, see the `--sq` 274option. 275 276Example 277~~~~~~~ 278 279------------ 280$ cat >your-git-script.sh <<\EOF 281#!/bin/sh 282args=$(git rev-parse --sq-quote "$@") # quote user-supplied arguments 283command="git frotz -n24 $args" # and use it inside a handcrafted 284 # command line 285eval "$command" 286EOF 287 288$ sh your-git-script.sh "a b'c" 289------------ 290 291EXAMPLES 292-------- 293 294* Print the object name of the current commit: 295+ 296------------ 297$ git rev-parse --verify HEAD 298------------ 299 300* Print the commit object name from the revision in the $REV shell variable: 301+ 302------------ 303$ git rev-parse --verify $REV 304------------ 305+ 306This will error out if $REV is empty or not a valid revision. 307 308* Same as above: 309+ 310------------ 311$ git rev-parse --default master --verify $REV 312------------ 313+ 314but if $REV is empty, the commit object name from master will be printed. 315 316GIT 317--- 318Part of the linkgit:git[1] suite