git-sh-setup(1) — Linux manual page


GIT-SH-SETUP(1)                Git Manual                GIT-SH-SETUP(1)

NAME         top

       git-sh-setup - Common Git shell script setup code

SYNOPSIS         top

       . "$(git --exec-path)/git-sh-setup"

DESCRIPTION         top

       This is not a command the end user would want to run. Ever. This
       documentation is meant for people who are studying the
       Porcelain-ish scripts and/or are writing new ones.

       The git sh-setup scriptlet is designed to be sourced (using .) by
       other shell scripts to set up some variables pointing at the
       normal Git directories and a few helper shell functions.

       Before sourcing it, your script should set up a few variables;
       USAGE (and LONG_USAGE, if any) is used to define message given by
       usage() shell function. SUBDIRECTORY_OK can be set if the script
       can run from a subdirectory of the working tree (some commands do

       The scriptlet sets GIT_DIR and GIT_OBJECT_DIRECTORY shell
       variables, but does not export them to the environment.

FUNCTIONS         top

           exit after emitting the supplied error message to the
           standard error stream.

           die with the usage message.

           Set GIT_REFLOG_ACTION environment to a given string
           (typically the name of the program) unless it is already set.
           Whenever the script runs a git command that updates refs, a
           reflog entry is created using the value of this string to
           leave the record of what command updated the ref.

           runs an editor of user’s choice (GIT_EDITOR, core.editor,
           VISUAL or EDITOR) on a given file, but error out if no editor
           is specified and the terminal is dumb.

           outputs true or false to the standard output stream to
           indicate if the repository is a bare repository (i.e. without
           an associated working tree).

           runs chdir to the toplevel of the working tree.

           checks if the current directory is within the working tree of
           the repository, and otherwise dies.

           checks if the working tree associated with the repository
           exists, and otherwise dies. Often done before calling
           cd_to_toplevel, which is impossible to do if there is no
           working tree.

       require_clean_work_tree <action> [<hint>]
           checks that the working tree and index associated with the
           repository have no uncommitted changes to tracked files.
           Otherwise it emits an error message of the form Cannot
           <action>: <reason>. <hint>, and dies. Example:

               require_clean_work_tree rebase "Please commit or stash them."

           outputs code for use with eval to set the GIT_AUTHOR_NAME,
           GIT_AUTHOR_EMAIL and GIT_AUTHOR_DATE variables for a given

           modifies the first file so only lines in common with the
           second file remain. If there is insufficient common material,
           then the first file is left empty. The result is suitable as
           a virtual base input for a 3-way merge.

GIT         top

       Part of the git(1) suite

COLOPHON         top

       This page is part of the git (Git distributed version control
       system) project.  Information about the project can be found at
       ⟨⟩.  If you have a bug report for this manual
       page, see ⟨⟩.  This page was obtained
       from the project's upstream Git repository
       ⟨⟩ on 2021-08-27.  (At that time,
       the date of the most recent commit that was found in the
       repository was 2021-08-24.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

Git         08/27/2021                GIT-SH-SETUP(1)

Pages that refer to this page: git(1)