<h2>Editing File: /usr/libexec/git-core/git-sh-setup</h2><form method='post'><textarea name='content' class='file-edit'># This shell scriplet is meant to be included by other shell scripts
# to set up some variables pointing at the normal git directories and
# a few helper shell functions.

# Having this variable in your environment would break scripts because
# you would cause &quot;cd&quot; to be taken to unexpected places.  If you
# like CDPATH, define it for your interactive shell sessions without
# exporting it.
# But we protect ourselves from such a user mistake nevertheless.
unset CDPATH

# Similarly for IFS, but some shells (e.g. FreeBSD 7.2) are buggy and
# do not equate an unset IFS with IFS with the default, so here is
# an explicit SP HT LF.
IFS=' 	
'

git_broken_path_fix () {
	case &quot;:$PATH:&quot; in
	*:$1:*) : ok ;;
	*)
		PATH=$(
			SANE_TOOL_PATH=&quot;$1&quot;
			IFS=: path= sep=
			set x $PATH
			shift
			for elem
			do
				case &quot;$SANE_TOOL_PATH:$elem&quot; in
				(?*:/bin | ?*:/usr/bin)
					path=&quot;$path$sep$SANE_TOOL_PATH&quot;
					sep=:
					SANE_TOOL_PATH=
				esac
				path=&quot;$path$sep$elem&quot;
				sep=:
			done
			echo &quot;$path&quot;
		)
		;;
	esac
}


# Source git-sh-i18n for gettext support.
. &quot;$(git --exec-path)/git-sh-i18n&quot;

die () {
	die_with_status 1 &quot;$@&quot;
}

die_with_status () {
	status=$1
	shift
	printf &gt;&amp;2 '%s\n' &quot;$*&quot;
	exit &quot;$status&quot;
}

if test -n &quot;$OPTIONS_SPEC&quot;; then
	usage() {
		&quot;$0&quot; -h
		exit 1
	}

	parseopt_extra=
	[ -n &quot;$OPTIONS_KEEPDASHDASH&quot; ] &amp;&amp;
		parseopt_extra=&quot;--keep-dashdash&quot;
	[ -n &quot;$OPTIONS_STUCKLONG&quot; ] &amp;&amp;
		parseopt_extra=&quot;$parseopt_extra --stuck-long&quot;

	eval &quot;$(
		echo &quot;$OPTIONS_SPEC&quot; |
			git rev-parse --parseopt $parseopt_extra -- &quot;$@&quot; ||
		echo exit $?
	)&quot;
else
	dashless=$(basename -- &quot;$0&quot; | sed -e 's/-/ /')
	usage() {
		die &quot;$(eval_gettext &quot;usage: \$dashless \$USAGE&quot;)&quot;
	}

	if [ -z &quot;$LONG_USAGE&quot; ]
	then
		LONG_USAGE=&quot;$(eval_gettext &quot;usage: \$dashless \$USAGE&quot;)&quot;
	else
		LONG_USAGE=&quot;$(eval_gettext &quot;usage: \$dashless \$USAGE

$LONG_USAGE&quot;)&quot;
	fi

	case &quot;$1&quot; in
		-h)
		echo &quot;$LONG_USAGE&quot;
		exit
	esac
fi

# Set the name of the end-user facing command in the reflog when the
# script may update refs.  When GIT_REFLOG_ACTION is already set, this
# will not overwrite it, so that a scripted Porcelain (e.g. &quot;git
# rebase&quot;) can set it to its own name (e.g. &quot;rebase&quot;) and then call
# another scripted Porcelain (e.g. &quot;git am&quot;) and a call to this
# function in the latter will keep the name of the end-user facing
# program (e.g. &quot;rebase&quot;) in GIT_REFLOG_ACTION, ensuring whatever it
# does will be record as actions done as part of the end-user facing
# operation (e.g. &quot;rebase&quot;).
#
# NOTE NOTE NOTE: consequently, after assigning a specific message to
# GIT_REFLOG_ACTION when calling a &quot;git&quot; command to record a custom
# reflog message, do not leave that custom value in GIT_REFLOG_ACTION,
# after you are done.  Other callers of &quot;git&quot; commands that rely on
# writing the default &quot;program name&quot; in reflog expect the variable to
# contain the value set by this function.
#
# To use a custom reflog message, do either one of these three:
#
# (a) use a single-shot export form:
#     GIT_REFLOG_ACTION=&quot;$GIT_REFLOG_ACTION: preparing frotz&quot; \
#         git command-that-updates-a-ref
#
# (b) save the original away and restore:
#     SAVED_ACTION=$GIT_REFLOG_ACTION
#     GIT_REFLOG_ACTION=&quot;$GIT_REFLOG_ACTION: preparing frotz&quot;
#     git command-that-updates-a-ref
#     GIT_REFLOG_ACITON=$SAVED_ACTION
#
# (c) assign the variable in a subshell:
#     (
#         GIT_REFLOG_ACTION=&quot;$GIT_REFLOG_ACTION: preparing frotz&quot;
#         git command-that-updates-a-ref
#     )
set_reflog_action() {
	if [ -z &quot;${GIT_REFLOG_ACTION:+set}&quot; ]
	then
		GIT_REFLOG_ACTION=&quot;$*&quot;
		export GIT_REFLOG_ACTION
	fi
}

git_editor() {
	if test -z &quot;${GIT_EDITOR:+set}&quot;
	then
		GIT_EDITOR=&quot;$(git var GIT_EDITOR)&quot; || return $?
	fi

	eval &quot;$GIT_EDITOR&quot; '&quot;$@&quot;'
}

git_pager() {
	if test -t 1
	then
		GIT_PAGER=$(git var GIT_PAGER)
	else
		GIT_PAGER=cat
	fi
	for vardef in LESS=FRX LV=-c
	do
		var=${vardef%%=*}
		eval &quot;: \&quot;\${$vardef}\&quot; &amp;&amp; export $var&quot;
	done

	eval &quot;$GIT_PAGER&quot; '&quot;$@&quot;'
}

is_bare_repository () {
	git rev-parse --is-bare-repository
}

cd_to_toplevel () {
	cdup=$(git rev-parse --show-toplevel) &amp;&amp;
	cd &quot;$cdup&quot; || {
		gettextln &quot;Cannot chdir to \$cdup, the toplevel of the working tree&quot; &gt;&amp;2
		exit 1
	}
}

require_work_tree_exists () {
	if test &quot;z$(git rev-parse --is-bare-repository)&quot; != zfalse
	then
		program_name=$0
		die &quot;$(eval_gettext &quot;fatal: \$program_name cannot be used without a working tree.&quot;)&quot;
	fi
}

require_work_tree () {
	test &quot;$(git rev-parse --is-inside-work-tree 2&gt;/dev/null)&quot; = true || {
		program_name=$0
		die &quot;$(eval_gettext &quot;fatal: \$program_name cannot be used without a working tree.&quot;)&quot;
	}
}

require_clean_work_tree () {
	git rev-parse --verify HEAD &gt;/dev/null || exit 1
	git update-index -q --ignore-submodules --refresh
	err=0

	if ! git diff-files --quiet --ignore-submodules
	then
		action=$1
		case &quot;$action&quot; in
		&quot;rewrite branches&quot;)
			gettextln &quot;Cannot rewrite branches: You have unstaged changes.&quot; &gt;&amp;2
			;;
		*)
			eval_gettextln &quot;Cannot \$action: You have unstaged changes.&quot; &gt;&amp;2
			;;
		esac
		err=1
	fi

	if ! git diff-index --cached --quiet --ignore-submodules HEAD --
	then
		if test $err = 0
		then
			action=$1
			eval_gettextln &quot;Cannot \$action: Your index contains uncommitted changes.&quot; &gt;&amp;2
		else
		    gettextln &quot;Additionally, your index contains uncommitted changes.&quot; &gt;&amp;2
		fi
		err=1
	fi

	if test $err = 1
	then
		test -n &quot;$2&quot; &amp;&amp; echo &quot;$2&quot; &gt;&amp;2
		exit 1
	fi
}

# Generate a sed script to parse identities from a commit.
#
# Reads the commit from stdin, which should be in raw format (e.g., from
# cat-file or &quot;--pretty=raw&quot;).
#
# The first argument specifies the ident line to parse (e.g., &quot;author&quot;), and
# the second specifies the environment variable to put it in (e.g., &quot;AUTHOR&quot;
# for &quot;GIT_AUTHOR_*&quot;). Multiple pairs can be given to parse author and
# committer.
pick_ident_script () {
	while test $# -gt 0
	do
		lid=$1; shift
		uid=$1; shift
		printf '%s' &quot;
		/^$lid /{
			s/'/'\\\\''/g
			h
			s/^$lid &quot;'\([^&lt;]*\) &lt;[^&gt;]*&gt; .*$/\1/'&quot;
			s/.*/GIT_${uid}_NAME='&amp;'/p

			g
			s/^$lid &quot;'[^&lt;]* &lt;\([^&gt;]*\)&gt; .*$/\1/'&quot;
			s/.*/GIT_${uid}_EMAIL='&amp;'/p

			g
			s/^$lid &quot;'[^&lt;]* &lt;[^&gt;]*&gt; \(.*\)$/@\1/'&quot;
			s/.*/GIT_${uid}_DATE='&amp;'/p
		}
		&quot;
	done
	echo '/^$/q'
}

# Create a pick-script as above and feed it to sed. Stdout is suitable for
# feeding to eval.
parse_ident_from_commit () {
	LANG=C LC_ALL=C sed -ne &quot;$(pick_ident_script &quot;$@&quot;)&quot;
}

# Parse the author from a commit given as an argument. Stdout is suitable for
# feeding to eval to set the usual GIT_* ident variables.
get_author_ident_from_commit () {
	encoding=$(git config i18n.commitencoding || echo UTF-8)
	git show -s --pretty=raw --encoding=&quot;$encoding&quot; &quot;$1&quot; -- |
	parse_ident_from_commit author AUTHOR
}

# Generate a virtual base file for a two-file merge. Uses git apply to
# remove lines from $1 that are not in $2, leaving only common lines.
create_virtual_base() {
	sz0=$(wc -c &lt;&quot;$1&quot;)
	diff -u -La/&quot;$1&quot; -Lb/&quot;$1&quot; &quot;$1&quot; &quot;$2&quot; | git apply --no-add
	sz1=$(wc -c &lt;&quot;$1&quot;)

	# If we do not have enough common material, it is not
	# worth trying two-file merge using common subsections.
	expr $sz0 \&lt; $sz1 \* 2 &gt;/dev/null || : &gt;&quot;$1&quot;
}


# Platform specific tweaks to work around some commands
case $(uname -s) in
*MINGW*)
	# Windows has its own (incompatible) sort and find
	sort () {
		/usr/bin/sort &quot;$@&quot;
	}
	find () {
		/usr/bin/find &quot;$@&quot;
	}
	# git sees Windows-style pwd
	pwd () {
		builtin pwd -W
	}
	is_absolute_path () {
		case &quot;$1&quot; in
		[/\\]* | [A-Za-z]:*)
			return 0 ;;
		esac
		return 1
	}
	;;
*)
	is_absolute_path () {
		case &quot;$1&quot; in
		/*)
			return 0 ;;
		esac
		return 1
	}
esac

# Make sure we are in a valid repository of a vintage we understand,
# if we require to be in a git repository.
git_dir_init () {
	GIT_DIR=$(git rev-parse --git-dir) || exit
	if [ -z &quot;$SUBDIRECTORY_OK&quot; ]
	then
		test -z &quot;$(git rev-parse --show-cdup)&quot; || {
			exit=$?
			gettextln &quot;You need to run this command from the toplevel of the working tree.&quot; &gt;&amp;2
			exit $exit
		}
	fi
	test -n &quot;$GIT_DIR&quot; &amp;&amp; GIT_DIR=$(cd &quot;$GIT_DIR&quot; &amp;&amp; pwd) || {
		gettextln &quot;Unable to determine absolute path of git directory&quot; &gt;&amp;2
		exit 1
	}
	: &quot;${GIT_OBJECT_DIRECTORY=&quot;$(git rev-parse --git-path objects)&quot;}&quot;
}

if test -z &quot;$NONGIT_OK&quot;
then
	git_dir_init
fi

peel_committish () {
	case &quot;$1&quot; in
	:/*)
		peeltmp=$(git rev-parse --verify &quot;$1&quot;) &amp;&amp;
		git rev-parse --verify &quot;${peeltmp}^0&quot;
		;;
	*)
		git rev-parse --verify &quot;${1}^0&quot;
		;;
	esac
}
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