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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 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.

       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 2.13.2			  06/24/2017		       GIT-SH-SETUP(1)

NAME | SYNOPSIS | DESCRIPTION | FUNCTIONS | GIT

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