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



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

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


DESCRIPTION
       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 not).

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

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

       usage
           die with the usage message.

       set_reflog_action
           set the message that will be recorded to describe the end-user action in the reflog, when the
           script updates a ref.

       git_editor
           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.

       is_bare_repository
           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).

       cd_to_toplevel
           runs chdir to the toplevel of the working tree.

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

       require_work_tree_exists
           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."


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

       create_virtual_base
           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
       Part of the git(1) suite



Git 1.8.3                                        05/24/2013                                  GIT-SH-SETUP(1)