diff options
Diffstat (limited to 'Documentation/git-rev-parse.txt')
| -rw-r--r-- | Documentation/git-rev-parse.txt | 61 |
1 files changed, 45 insertions, 16 deletions
diff --git a/Documentation/git-rev-parse.txt b/Documentation/git-rev-parse.txt index 8d90863ee3..993903c9f1 100644 --- a/Documentation/git-rev-parse.txt +++ b/Documentation/git-rev-parse.txt @@ -14,7 +14,7 @@ SYNOPSIS DESCRIPTION ----------- -Many git porcelainish commands take mixture of flags +Many Git porcelainish commands take 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 @@ -59,9 +59,36 @@ OPTIONS 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)" +eval "set -- $(git rev-parse --sq --prefix "$prefix" "$@")" +---- + --verify:: - The parameter given must be usable as a single, valid - object name. Otherwise barf and abort. + Verify that exactly one parameter is provided, and that it + can be turned into a raw 20-byte SHA-1 that can be used to + access the object database. If so, emit it to the standard + output; otherwise, error out. ++ +If you want to make sure that the output actually names an object in +your object database and/or can be used as a specific type of object +you require, you can add "^{type}" peeling operator to the parmeter. +For example, `git rev-parse "$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 "$VAR^{object}"` +can be used. -q:: --quiet:: @@ -84,7 +111,7 @@ OPTIONS one. --symbolic:: - Usually the object names are output in SHA1 form (with + Usually the object names are output in SHA-1 form (with possible '{caret}' prefix); this option makes them output in a form as close to the original input as possible. @@ -119,15 +146,14 @@ OPTIONS + If a `pattern` is given, only refs matching the given shell glob are shown. If the pattern does not contain a globbing character (`?`, -`{asterisk}`, or `[`), it is turned into a prefix match by -appending `/{asterisk}`. +`*`, or `[`), it is turned into a prefix match by appending `/*`. --glob=pattern:: Show all refs matching the shell glob pattern `pattern`. If the pattern does not start with `refs/`, this is automatically prepended. If the pattern does not contain a globbing - character (`?`, `{asterisk}`, or `[`), it is turned into a prefix - match by appending `/{asterisk}`. + character (`?`, `*`, or `[`), it is turned into a prefix + match by appending `/*`. --show-toplevel:: Show the absolute path of the top-level directory. @@ -144,10 +170,11 @@ appending `/{asterisk}`. --git-dir:: Show `$GIT_DIR` if defined. Otherwise show the path to - the .git directory, relative to the current directory. + 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 +is not detected to lie in a Git repository or work tree print a message to stderr and exit with nonzero status. --is-inside-git-dir:: @@ -169,7 +196,7 @@ print a message to stderr and exit with nonzero status. --short:: --short=number:: - Instead of outputting the full SHA1 values of object names try to + Instead of outputting the full SHA-1 values of object names try to abbreviate them to a shorter unique name. When no length is specified 7 is used. The minimum length is 4. @@ -187,9 +214,11 @@ print a message to stderr and exit with nonzero status. Flags and parameters to be parsed. --resolve-git-dir <path>:: - Check if <path> is a valid git-dir or a git-file pointing to a valid - git-dir. If <path> is a valid git-dir the resolved path to git-dir will - be printed. + 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. + include::revisions.txt[] @@ -306,12 +335,12 @@ $ git rev-parse --verify HEAD * Print the commit object name from the revision in the $REV shell variable: + ------------ -$ git rev-parse --verify $REV +$ git rev-parse --verify $REV^{commit} ------------ + This will error out if $REV is empty or not a valid revision. -* Same as above: +* Similar to above: + ------------ $ git rev-parse --default master --verify $REV |