man > GIT-REV-PARSE

⚡ TLDR: GIT-REV-PARSE (tldr-pages)

Display metadata related to revisions.

  • Get the commit hash of a branch
    git rev-parse {{branch_name}}
  • Get the current branch name
    git rev-parse --abbrev-ref {{HEAD}}
  • Get the absolute path to the root directory
    git rev-parse --show-toplevel
GIT-REV-PARSE(1)                             Git Manual                             GIT-REV-PARSE(1)

NAME
       git-rev-parse - Pick out and massage parameters

SYNOPSIS
       git rev-parse [<options>] <args>...


DESCRIPTION
       Many Git porcelainish commands take a mixture of flags (i.e. parameters that begin with a
       dash -) and parameters meant for the underlying git rev-list command they use internally and
       flags and parameters for the other commands they use downstream of git rev-list. This command
       is used to distinguish between them.

OPTIONS
   Operation Modes
       Each of these options must appear first on the command line.

       --parseopt
           Use git rev-parse in option parsing mode (see PARSEOPT section below).

       --sq-quote
           Use git rev-parse in shell quoting mode (see SQ-QUOTE section below). In contrast to the
           --sq option below, this mode only does quoting. Nothing else is done to command input.

   Options for --parseopt
       --keep-dashdash
           Only meaningful in --parseopt mode. Tells the option parser to echo out the first -- met
           instead of skipping it.

       --stop-at-non-option
           Only meaningful in --parseopt mode. Lets the option parser stop at the first non-option
           argument. This can be used to parse sub-commands that take options themselves.

       --stuck-long
           Only meaningful in --parseopt mode. Output the options in their long form if available,
           and with their arguments stuck.

   Options for Filtering
       --revs-only
           Do not output flags and parameters not meant for git rev-list command.

       --no-revs
           Do not output flags and parameters meant for git rev-list command.

       --flags
           Do not output non-flag parameters.

       --no-flags
           Do not output flag parameters.

   Options for Output
       --default <arg>
           If there is no parameter given by the user, use <arg> instead.

       --prefix <arg>
           Behave as if git rev-parse was invoked from the <arg> subdirectory of the working tree.
           Any relative filenames are resolved as if they are prefixed by <arg> and will be printed
           in that form.

           This can be used to convert arguments to a command run in a subdirectory so that they can
           still be used after moving to the top-level of the repository. For example:

               prefix=$(git rev-parse --show-prefix)
               cd "$(git rev-parse --show-toplevel)"
               # rev-parse provides the -- needed for 'set'
               eval "set $(git rev-parse --sq --prefix "$prefix" -- "$@")"


       --verify
           Verify that exactly one parameter is provided, and that it can be turned into a raw
           20-byte SHA-1 that can be used to access the object database. If so, emit it to the
           standard output; otherwise, error out.

           If you want to make sure that the output actually names an object in your object database
           and/or can be used as a specific type of object you require, you can add the ^{type}
           peeling operator to the parameter. For example, git rev-parse "$VAR^{commit}" will make
           sure $VAR names an existing object that is a commit-ish (i.e. a commit, or an annotated
           tag that points at a commit). To make sure that $VAR names an existing object of any
           type, git rev-parse "$VAR^{object}" can be used.

           Note that if you are verifying a name from an untrusted source, it is wise to use
           --end-of-options so that the name argument is not mistaken for another option.

       -q, --quiet
           Only meaningful in --verify mode. Do not output an error message if the first argument is
           not a valid object name; instead exit with non-zero status silently. SHA-1s for valid
           object names are printed to stdout on success.

       --sq
           Usually the output is made one line per flag and parameter. This option makes output a
           single line, properly quoted for consumption by shell. Useful when you expect your
           parameter to contain whitespaces and newlines (e.g. when using pickaxe -S with git
           diff-*). In contrast to the --sq-quote option, the command input is still interpreted as
           usual.

       --short[=length]
           Same as --verify but shortens the object name to a unique prefix with at least length
           characters. The minimum length is 4, the default is the effective value of the
           core.abbrev configuration variable (see git-config(1)).

       --not
           When showing object names, prefix them with ^ and strip ^ prefix from the object names
           that already have one.

       --abbrev-ref[=(strict|loose)]
           A non-ambiguous short name of the objects name. The option core.warnAmbiguousRefs is used
           to select the strict abbreviation mode.

       --symbolic
           Usually the object names are output in SHA-1 form (with possible ^ prefix); this option
           makes them output in a form as close to the original input as possible.

       --symbolic-full-name
           This is similar to --symbolic, but it omits input that are not refs (i.e. branch or tag
           names; or more explicitly disambiguating "heads/master" form, when you want to name the
           "master" branch when there is an unfortunately named tag "master"), and shows them as
           full refnames (e.g. "refs/heads/master").

   Options for Objects
       --all
           Show all refs found in refs/.

       --branches[=pattern], --tags[=pattern], --remotes[=pattern]
           Show all branches, tags, or remote-tracking branches, respectively (i.e., refs found in
           refs/heads, refs/tags, or refs/remotes, respectively).

           If a pattern is given, only refs matching the given shell glob are shown. If the pattern
           does not contain a globbing character (?, *, or [), it is turned into a prefix match by
           appending /*.

       --glob=pattern
           Show all refs matching the shell glob pattern pattern. If the pattern does not start with
           refs/, this is automatically prepended. If the pattern does not contain a globbing
           character (?, *, or [), it is turned into a prefix match by appending /*.

       --exclude=<glob-pattern>
           Do not include refs matching <glob-pattern> that the next --all, --branches, --tags,
           --remotes, or --glob would otherwise consider. Repetitions of this option accumulate
           exclusion patterns up to the next --all, --branches, --tags, --remotes, or --glob option
           (other options or arguments do not clear accumulated patterns).

           The patterns given should not begin with refs/heads, refs/tags, or refs/remotes when
           applied to --branches, --tags, or --remotes, respectively, and they must begin with refs/
           when applied to --glob or --all. If a trailing /* is intended, it must be given
           explicitly.

       --exclude-hidden=[fetch|receive|uploadpack]
           Do not include refs that would be hidden by git-fetch, git-receive-pack or
           git-upload-pack by consulting the appropriate fetch.hideRefs, receive.hideRefs or
           uploadpack.hideRefs configuration along with transfer.hideRefs (see git-config(1)). This
           option affects the next pseudo-ref option --all or --glob and is cleared after processing
           them.

       --disambiguate=<prefix>
           Show every object whose name begins with the given prefix. The <prefix> must be at least
           4 hexadecimal digits long to avoid listing each and every object in the repository by
           mistake.

   Options for Files
       --local-env-vars
           List the GIT_* environment variables that are local to the repository (e.g. GIT_DIR or
           GIT_WORK_TREE, but not GIT_EDITOR). Only the names of the variables are listed, not their
           value, even if they are set.

       --path-format=(absolute|relative)
           Controls the behavior of certain other options. If specified as absolute, the paths
           printed by those options will be absolute and canonical. If specified as relative, the
           paths will be relative to the current working directory if that is possible. The default
           is option specific.

           This option may be specified multiple times and affects only the arguments that follow it
           on the command line, either to the end of the command line or the next instance of this
           option.

       The following options are modified by --path-format:

       --git-dir
           Show $GIT_DIR if defined. Otherwise show the path to the .git directory. The path shown,
           when relative, is relative to the current working directory.

           If $GIT_DIR is not defined and the current directory is not detected to lie in a Git
           repository or work tree print a message to stderr and exit with nonzero status.

       --git-common-dir
           Show $GIT_COMMON_DIR if defined, else $GIT_DIR.

       --resolve-git-dir <path>
           Check if <path> is a valid repository or a gitfile that points at a valid repository, and
           print the location of the repository. If <path> is a gitfile then the resolved path to
           the real repository is printed.

       --git-path <path>
           Resolve "$GIT_DIR/<path>" and takes other path relocation variables such as
           $GIT_OBJECT_DIRECTORY, $GIT_INDEX_FILE... into account. For example, if
           $GIT_OBJECT_DIRECTORY is set to /foo/bar then "git rev-parse --git-path objects/abc"
           returns /foo/bar/abc.

       --show-toplevel
           Show the (by default, absolute) path of the top-level directory of the working tree. If
           there is no working tree, report an error.

       --show-superproject-working-tree
           Show the absolute path of the root of the superproject’s working tree (if exists) that
           uses the current repository as its submodule. Outputs nothing if the current repository
           is not used as a submodule by any project.

       --shared-index-path
           Show the path to the shared index file in split index mode, or empty if not in
           split-index mode.

       The following options are unaffected by --path-format:

       --absolute-git-dir
           Like --git-dir, but its output is always the canonicalized absolute path.

       --is-inside-git-dir
           When the current working directory is below the repository directory print "true",
           otherwise "false".

       --is-inside-work-tree
           When the current working directory is inside the work tree of the repository print
           "true", otherwise "false".

       --is-bare-repository
           When the repository is bare print "true", otherwise "false".

       --is-shallow-repository
           When the repository is shallow print "true", otherwise "false".

       --show-cdup
           When the command is invoked from a subdirectory, show the path of the top-level directory
           relative to the current directory (typically a sequence of "../", or an empty string).

       --show-prefix
           When the command is invoked from a subdirectory, show the path of the current directory
           relative to the top-level directory.

       --show-object-format[=(storage|input|output)]
           Show the object format (hash algorithm) used for the repository for storage inside the
           .git directory, input, or output. For input, multiple algorithms may be printed,
           space-separated. If not specified, the default is "storage".

   Other Options
       --since=datestring, --after=datestring
           Parse the date string, and output the corresponding --max-age= parameter for git
           rev-list.

       --until=datestring, --before=datestring
           Parse the date string, and output the corresponding --min-age= parameter for git
           rev-list.

       <args>...
           Flags and parameters to be parsed.

SPECIFYING REVISIONS
       A revision parameter <rev> typically, but not necessarily, names a commit object. It uses
       what is called an extended SHA-1 syntax. Here are various ways to spell object names. The
       ones listed near the end of this list name trees and blobs contained in a commit.

           Note

           This document shows the "raw" syntax as seen by git. The shell and other UIs might
           require additional quoting to protect special characters and to avoid word splitting.

       <sha1>, e.g. dae86e1950b1277e545cee180551750029cfe735, dae86e
           The full SHA-1 object name (40-byte hexadecimal string), or a leading substring that is
           unique within the repository. E.g. dae86e1950b1277e545cee180551750029cfe735 and dae86e
           both name the same commit object if there is no other object in your repository whose
           object name starts with dae86e.

       <describeOutput>, e.g. v1.7.4.2-679-g3bee7fb
           Output from git describe; i.e. a closest tag, optionally followed by a dash and a number
           of commits, followed by a dash, a g, and an abbreviated object name.

       <refname>, e.g. master, heads/master, refs/heads/master
           A symbolic ref name. E.g.  master typically means the commit object referenced by
           refs/heads/master. If you happen to have both heads/master and tags/master, you can
           explicitly say heads/master to tell Git which one you mean. When ambiguous, a <refname>
           is disambiguated by taking the first match in the following rules:

            1. If $GIT_DIR/<refname> exists, that is what you mean (this is usually useful only for
               HEAD, FETCH_HEAD, ORIG_HEAD, MERGE_HEAD, REBASE_HEAD, REVERT_HEAD, CHERRY_PICK_HEAD,
               BISECT_HEAD and AUTO_MERGE);

            2. otherwise, refs/<refname> if it exists;

            3. otherwise, refs/tags/<refname> if it exists;

            4. otherwise, refs/heads/<refname> if it exists;

            5. otherwise, refs/remotes/<refname> if it exists;

            6. otherwise, refs/remotes/<refname>/HEAD if it exists.

           HEAD
               names the commit on which you based the changes in the working tree.

           FETCH_HEAD
               records the branch which you fetched from a remote repository with your last git
               fetch invocation.

           ORIG_HEAD
               is created by commands that move your HEAD in a drastic way (git am, git merge, git
               rebase, git reset), to record the position of the HEAD before their operation, so
               that you can easily change the tip of the branch back to the state before you ran
               them.

           MERGE_HEAD
               records the commit(s) which you are merging into your branch when you run git merge.

           REBASE_HEAD
               during a rebase, records the commit at which the operation is currently stopped,
               either because of conflicts or an edit command in an interactive rebase.

           REVERT_HEAD
               records the commit which you are reverting when you run git revert.

           CHERRY_PICK_HEAD
               records the commit which you are cherry-picking when you run git cherry-pick.

           BISECT_HEAD
               records the current commit to be tested when you run git bisect --no-checkout.

           AUTO_MERGE
               records a tree object corresponding to the state the ort merge strategy wrote to the
               working tree when a merge operation resulted in conflicts.

           Note that any of the refs/* cases above may come either from the $GIT_DIR/refs directory
           or from the $GIT_DIR/packed-refs file. While the ref name encoding is unspecified, UTF-8
           is preferred as some output processing may assume ref names in UTF-8.

       @
           @ alone is a shortcut for HEAD.

       [<refname>]@{<date>}, e.g. master@{yesterday}, HEAD@{5 minutes ago}
           A ref followed by the suffix @ with a date specification enclosed in a brace pair (e.g.
           {yesterday}, {1 month 2 weeks 3 days 1 hour 1 second ago} or {1979-02-26 18:30:00})
           specifies the value of the ref at a prior point in time. This suffix may only be used
           immediately following a ref name and the ref must have an existing log
           ($GIT_DIR/logs/<ref>). Note that this looks up the state of your local ref at a given
           time; e.g., what was in your local master branch last week. If you want to look at
           commits made during certain times, see --since and --until.

       <refname>@{<n>}, e.g. master@{1}
           A ref followed by the suffix @ with an ordinal specification enclosed in a brace pair
           (e.g.  {1}, {15}) specifies the n-th prior value of that ref. For example master@{1} is
           the immediate prior value of master while master@{5} is the 5th prior value of master.
           This suffix may only be used immediately following a ref name and the ref must have an
           existing log ($GIT_DIR/logs/<refname>).

       @{<n>}, e.g. @{1}
           You can use the @ construct with an empty ref part to get at a reflog entry of the
           current branch. For example, if you are on branch blabla then @{1} means the same as
           blabla@{1}.

       @{-<n>}, e.g. @{-1}
           The construct @{-<n>} means the <n>th branch/commit checked out before the current one.

       [<branchname>]@{upstream}, e.g. master@{upstream}, @{u}
           A branch B may be set up to build on top of a branch X (configured with
           branch.<name>.merge) at a remote R (configured with the branch X taken from remote R,
           typically found at refs/remotes/R/X.

       [<branchname>]@{push}, e.g. master@{push}, @{push}
           The suffix @{push} reports the branch "where we would push to" if git push were run while
           branchname was checked out (or the current HEAD if no branchname is specified). Like for
           @{upstream}, we report the remote-tracking branch that corresponds to that branch at the
           remote.

           Here’s an example to make it more clear:

               $ git config push.default current
               $ git config remote.pushdefault myfork
               $ git switch -c mybranch origin/master

               $ git rev-parse --symbolic-full-name @{upstream}
               refs/remotes/origin/master

               $ git rev-parse --symbolic-full-name @{push}
               refs/remotes/myfork/mybranch

           Note in the example that we set up a triangular workflow, where we pull from one location
           and push to another. In a non-triangular workflow, @{push} is the same as @{upstream},
           and there is no need for it.

           This suffix is also accepted when spelled in uppercase, and means the same thing no
           matter the case.

       <rev>^[<n>], e.g. HEAD^, v1.5.1^0
           A suffix ^ to a revision parameter means the first parent of that commit object.  ^<n>
           means the <n>th parent (i.e.  <rev>^ is equivalent to <rev>^1). As a special rule,
           <rev>^0 means the commit itself and is used when <rev> is the object name of a tag object
           that refers to a commit object.

       <rev>~[<n>], e.g. HEAD~, master~3
           A suffix ~ to a revision parameter means the first parent of that commit object. A suffix
           ~<n> to a revision parameter means the commit object that is the <n>th generation
           ancestor of the named commit object, following only the first parents. I.e.  <rev>~3 is
           equivalent to <rev>^^^ which is equivalent to <rev>^1^1^1. See below for an illustration
           of the usage of this form.

       <rev>^{<type>}, e.g. v0.99.8^{commit}
           A suffix ^ followed by an object type name enclosed in brace pair means dereference the
           object at <rev> recursively until an object of type <type> is found or the object cannot
           be dereferenced anymore (in which case, barf). For example, if <rev> is a commit-ish,
           <rev>^{commit} describes the corresponding commit object. Similarly, if <rev> is a
           tree-ish, <rev>^{tree} describes the corresponding tree object.  <rev>^0 is a short-hand
           for <rev>^{commit}.

           <rev>^{object} can be used to make sure <rev> names an object that exists, without
           requiring <rev> to be a tag, and without dereferencing <rev>; because a tag is already an
           object, it does not have to be dereferenced even once to get to an object.

           <rev>^{tag} can be used to ensure that <rev> identifies an existing tag object.

       <rev>^{}, e.g. v0.99.8^{}
           A suffix ^ followed by an empty brace pair means the object could be a tag, and
           dereference the tag recursively until a non-tag object is found.

       <rev>^{/<text>}, e.g. HEAD^{/fix nasty bug}
           A suffix ^ to a revision parameter, followed by a brace pair that contains a text led by
           a slash, is the same as the :/fix nasty bug syntax below except that it returns the
           youngest matching commit which is reachable from the <rev> before ^.

       :/<text>, e.g. :/fix nasty bug
           A colon, followed by a slash, followed by a text, names a commit whose commit message
           matches the specified regular expression. This name returns the youngest matching commit
           which is reachable from any ref, including HEAD. The regular expression can match any
           part of the commit message. To match messages starting with a string, one can use e.g.
           :/^foo. The special sequence :/!  is reserved for modifiers to what is matched.  :/!-foo
           performs a negative match, while :/!!foo matches a literal !  character, followed by foo.
           Any other sequence beginning with :/!  is reserved for now. Depending on the given text,
           the shell’s word splitting rules might require additional quoting.

       <rev>:<path>, e.g. HEAD:README, master:./README
           A suffix : followed by a path names the blob or tree at the given path in the tree-ish
           object named by the part before the colon. A path starting with ./ or ../ is relative to
           the current working directory. The given path will be converted to be relative to the
           working tree’s root directory. This is most useful to address a blob or tree from a
           commit or tree that has the same tree structure as the working tree.

       :[<n>:]<path>, e.g. :0:README, :README
           A colon, optionally followed by a stage number (0 to 3) and a colon, followed by a path,
           names a blob object in the index at the given path. A missing stage number (and the colon
           that follows it) names a stage 0 entry. During a merge, stage 1 is the common ancestor,
           stage 2 is the target branch’s version (typically the current branch), and stage 3 is the
           version from the branch which is being merged.

       Here is an illustration, by Jon Loeliger. Both commit nodes B and C are parents of commit
       node A. Parent commits are ordered left-to-right.

           G   H   I   J
            \ /     \ /
             D   E   F
              \  |  / \
               \ | /   |
                \|/    |
                 B     C
                  \   /
                   \ /
                    A

           A =      = A^0
           B = A^   = A^1     = A~1
           C =      = A^2
           D = A^^  = A^1^1   = A~2
           E = B^2  = A^^2
           F = B^3  = A^^3
           G = A^^^ = A^1^1^1 = A~3
           H = D^2  = B^^2    = A^^^2  = A~2^2
           I = F^   = B^3^    = A^^3^
           J = F^2  = B^3^2   = A^^3^2

SPECIFYING RANGES
       History traversing commands such as git log operate on a set of commits, not just a single
       commit.

       For these commands, specifying a single revision, using the notation described in the
       previous section, means the set of commits reachable from the given commit.

       Specifying several revisions means the set of commits reachable from any of the given
       commits.

       A commit’s reachable set is the commit itself and the commits in its ancestry chain.

       There are several notations to specify a set of connected commits (called a "revision
       range"), illustrated below.

   Commit Exclusions
       ^<rev> (caret) Notation
           To exclude commits reachable from a commit, a prefix ^ notation is used. E.g.  ^r1 r2
           means commits reachable from r2 but exclude the ones reachable from r1 (i.e.  r1 and its
           ancestors).

   Dotted Range Notations
       The .. (two-dot) Range Notation
           The ^r1 r2 set operation appears so often that there is a shorthand for it. When you have
           two commits r1 and r2 (named according to the syntax explained in SPECIFYING REVISIONS
           above), you can ask for commits that are reachable from r2 excluding those that are
           reachable from r1 by ^r1 r2 and it can be written as r1..r2.

       The ... (three-dot) Symmetric Difference Notation
           A similar notation r1...r2 is called symmetric difference of r1 and r2 and is defined as
           r1 r2 --not $(git merge-base --all r1 r2). It is the set of commits that are reachable
           from either one of r1 (left side) or r2 (right side) but not from both.

       In these two shorthand notations, you can omit one end and let it default to HEAD. For
       example, origin.. is a shorthand for origin..HEAD and asks "What did I do since I forked from
       the origin branch?" Similarly, ..origin is a shorthand for HEAD..origin and asks "What did
       the origin do since I forked from them?" Note that .. would mean HEAD..HEAD which is an empty
       range that is both reachable and unreachable from HEAD.

       Commands that are specifically designed to take two distinct ranges (e.g. "git range-diff R1
       R2" to compare two ranges) do exist, but they are exceptions. Unless otherwise noted, all
       "git" commands that operate on a set of commits work on a single revision range. In other
       words, writing two "two-dot range notation" next to each other, e.g.

           $ git log A..B C..D

       does not specify two revision ranges for most commands. Instead it will name a single
       connected set of commits, i.e. those that are reachable from either B or D but are reachable
       from neither A or C. In a linear history like this:

           ---A---B---o---o---C---D

       because A and B are reachable from C, the revision range specified by these two dotted ranges
       is a single commit D.

   Other <rev>^ Parent Shorthand Notations
       Three other shorthands exist, particularly useful for merge commits, for naming a set that is
       formed by a commit and its parent commits.

       The r1^@ notation means all parents of r1.

       The r1^! notation includes commit r1 but excludes all of its parents. By itself, this
       notation denotes the single commit r1.

       The <rev>^-[<n>] notation includes <rev> but excludes the <n>th parent (i.e. a shorthand for
       <rev>^<n>..<rev>), with <n> = 1 if not given. This is typically useful for merge commits
       where you can just pass <commit>^- to get all the commits in the branch that was merged in
       merge commit <commit> (including <commit> itself).

       While <rev>^<n> was about specifying a single commit parent, these three notations also
       consider its parents. For example you can say HEAD^2^@, however you cannot say HEAD^@^2.

REVISION RANGE SUMMARY
       <rev>
           Include commits that are reachable from <rev> (i.e. <rev> and its ancestors).

       ^<rev>
           Exclude commits that are reachable from <rev> (i.e. <rev> and its ancestors).

       <rev1>..<rev2>
           Include commits that are reachable from <rev2> but exclude those that are reachable from
           <rev1>. When either <rev1> or <rev2> is omitted, it defaults to HEAD.

       <rev1>...<rev2>
           Include commits that are reachable from either <rev1> or <rev2> but exclude those that
           are reachable from both. When either <rev1> or <rev2> is omitted, it defaults to HEAD.

       <rev>^@, e.g. HEAD^@
           A suffix ^ followed by an at sign is the same as listing all parents of <rev> (meaning,
           include anything reachable from its parents, but not the commit itself).

       <rev>^!, e.g. HEAD^!
           A suffix ^ followed by an exclamation mark is the same as giving commit <rev> and all its
           parents prefixed with ^ to exclude them (and their ancestors).

       <rev>^-<n>, e.g. HEAD^-, HEAD^-2
           Equivalent to <rev>^<n>..<rev>, with <n> = 1 if not given.

       Here are a handful of examples using the Loeliger illustration above, with each step in the
       notation’s expansion and selection carefully spelt out:

              Args   Expanded arguments    Selected commits
              D                            G H D
              D F                          G H I J D F
              ^G D                         H D
              ^D B                         E I J F B
              ^D B C                       E I J F B C
              C                            I J F C
              B..C   = ^B C                C
              B...C  = B ^F C              G H D E B C
              B^-    = B^..B
                     = ^B^1 B              E I J F B
              C^@    = C^1
                     = F                   I J F
              B^@    = B^1 B^2 B^3
                     = D E F               D G H E F I J
              C^!    = C ^C^@
                     = C ^C^1
                     = C ^F                C
              B^!    = B ^B^@
                     = B ^B^1 ^B^2 ^B^3
                     = B ^D ^E ^F          B
              F^! D  = F ^I ^J D           G H D F

PARSEOPT
       In --parseopt mode, git rev-parse helps massaging options to bring to shell scripts the same
       facilities C builtins have. It works as an option normalizer (e.g. splits single switches
       aggregate values), a bit like getopt(1) does.

       It takes on the standard input the specification of the options to parse and understand, and
       echoes on the standard output a string suitable for sh(1) eval to replace the arguments with
       normalized ones. In case of error, it outputs usage on the standard error stream, and exits
       with code 129.

       Note: Make sure you quote the result when passing it to eval. See below for an example.

   Input Format
       git rev-parse --parseopt input format is fully text based. It has two parts, separated by a
       line that contains only --. The lines before the separator (should be one or more) are used
       for the usage. The lines after the separator describe the options.

       Each line of options has this format:

           <opt-spec><flags>*<arg-hint>? SP+ help LF



       <opt-spec>
           its format is the short option character, then the long option name separated by a comma.
           Both parts are not required, though at least one is necessary. May not contain any of the
           <flags> characters.  h,help, dry-run and f are examples of correct <opt-spec>.

       <flags>
           <flags> are of *, =, ?  or !.

           •   Use = if the option takes an argument.

           •   Use ?  to mean that the option takes an optional argument. You probably want to use
               the --stuck-long mode to be able to unambiguously parse the optional argument.

           •   Use * to mean that this option should not be listed in the usage generated for the -h
               argument. It’s shown for --help-all as documented in gitcli(7).

           •   Use !  to not make the corresponding negated long option available.

       <arg-hint>
           <arg-hint>, if specified, is used as a name of the argument in the help output, for
           options that take arguments.  <arg-hint> is terminated by the first whitespace. It is
           customary to use a dash to separate words in a multi-word argument hint.

       The remainder of the line, after stripping the spaces, is used as the help associated with
       the option.

       Blank lines are ignored, and lines that don’t match this specification are used as option
       group headers (start the line with a space to create such lines on purpose).

   Example
           OPTS_SPEC="\
           some-command [<options>] <args>...

           some-command does foo and bar!
           --
           h,help!   show the help

           foo       some nifty option --foo
           bar=      some cool option --bar with an argument
           baz=arg   another cool option --baz with a named argument
           qux?path  qux may take a path argument but has meaning by itself

             An option group Header
           C?        option C with an optional argument"

           eval "$(echo "$OPTS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)"


   Usage text
       When "$@" is -h or --help in the above example, the following usage text would be shown:

           usage: some-command [<options>] <args>...

               some-command does foo and bar!

               -h, --help            show the help
               --[no-]foo            some nifty option --foo
               --[no-]bar ...        some cool option --bar with an argument
               --[no-]baz <arg>      another cool option --baz with a named argument
               --[no-]qux[=<path>]   qux may take a path argument but has meaning by itself

           An option group Header
               -C[...]               option C with an optional argument


SQ-QUOTE
       In --sq-quote mode, git rev-parse echoes on the standard output a single line suitable for
       sh(1) eval. This line is made by normalizing the arguments following --sq-quote. Nothing
       other than quoting the arguments is done.

       If you want command input to still be interpreted as usual by git rev-parse before the output
       is shell quoted, see the --sq option.

   Example
           $ cat >your-git-script.sh <<\EOF
           #!/bin/sh
           args=$(git rev-parse --sq-quote "$@")   # quote user-supplied arguments
           command="git frotz -n24 $args"          # and use it inside a handcrafted
                                                   # command line
           eval "$command"
           EOF

           $ sh your-git-script.sh "a b'c"


EXAMPLES
       •   Print the object name of the current commit:

               $ git rev-parse --verify HEAD


       •   Print the commit object name from the revision in the $REV shell variable:

               $ git rev-parse --verify --end-of-options $REV^{commit}

           This will error out if $REV is empty or not a valid revision.

       •   Similar to above:

               $ git rev-parse --default master --verify --end-of-options $REV

           but if $REV is empty, the commit object name from master will be printed.

GIT
       Part of the git(1) suite

Git 2.43.0                                   07/02/2025                             GIT-REV-PARSE(1)
GIT-REV-PARSE □✕
NAME SYNOPSIS DESCRIPTION OPTIONS
Operation Modes --parseopt --sq-quote Options for --parseopt --keep-dashdash --stop-at-non-option --stuck-long Options for Filtering --revs-only --no-revs --flags --no-flags Options for Output --verify -q, --quiet --sq --short[=length] --not --abbrev-ref[=(strict|loose)] --symbolic --symbolic-full-name Options for Objects --all --branches[=pattern], --tags[=pattern], --remotes[=pattern] Options for Files --local-env-vars --git-dir --git-common-dir --show-toplevel --show-superproject-working-tree --shared-index-path --absolute-git-dir --is-inside-git-dir --is-inside-work-tree --is-bare-repository --is-shallow-repository --show-cdup --show-prefix --show-object-format[=(storage|input|output)] Other Options
SPECIFYING REVISIONS SPECIFYING RANGES
Commit Exclusions Dotted Range Notations Other ^ Parent Shorthand Notations
REVISION RANGE SUMMARY PARSEOPT
Input Format Example Usage text
SQ-QUOTE
Example
EXAMPLES GIT

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