[thirdparty/git.git] / git-sh-setup.sh

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

# @@BROKEN_PATH_FIX@@

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

die () {
	die_with_status 1 "$@"
}

die_with_status () {
	status=$1
	shift
	printf >&2 '%s\n' "$*"
	exit "$status"
}

GIT_QUIET=

say () {
	if test -z "$GIT_QUIET"
	then
		printf '%s\n' "$*"
	fi
}

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

	parseopt_extra=
	[ -n "$OPTIONS_KEEPDASHDASH" ] &&
		parseopt_extra="--keep-dashdash"
	[ -n "$OPTIONS_STUCKLONG" ] &&
		parseopt_extra="$parseopt_extra --stuck-long"

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

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

$LONG_USAGE")"
	fi

	case "$1" in
		-h)
		echo "$LONG_USAGE"
		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. "git
# rebase") can set it to its own name (e.g. "rebase") and then call
# another scripted Porcelain (e.g. "git am") and a call to this
# function in the latter will keep the name of the end-user facing
# program (e.g. "rebase") in GIT_REFLOG_ACTION, ensuring whatever it
# does will be record as actions done as part of the end-user facing
# operation (e.g. "rebase").
#
# NOTE NOTE NOTE: consequently, after assigning a specific message to
# GIT_REFLOG_ACTION when calling a "git" command to record a custom
# reflog message, do not leave that custom value in GIT_REFLOG_ACTION,
# after you are done.  Other callers of "git" commands that rely on
# writing the default "program name" 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="$GIT_REFLOG_ACTION: preparing frotz" \
#         git command-that-updates-a-ref
#
# (b) save the original away and restore:
#     SAVED_ACTION=$GIT_REFLOG_ACTION
#     GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: preparing frotz"
#     git command-that-updates-a-ref
#     GIT_REFLOG_ACITON=$SAVED_ACTION
#
# (c) assign the variable in a subshell:
#     (
#         GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: preparing frotz"
#         git command-that-updates-a-ref
#     )
set_reflog_action() {
	if [ -z "${GIT_REFLOG_ACTION:+set}" ]
	then
		GIT_REFLOG_ACTION="$*"
		export GIT_REFLOG_ACTION
	fi
}

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

	eval "$GIT_EDITOR" '"$@"'
}

git_pager() {
	if test -t 1
	then
		GIT_PAGER=$(git var GIT_PAGER)
	else
		GIT_PAGER=cat
	fi
	for vardef in @@PAGER_ENV@@
	do
		var=${vardef%%=*}
		eval ": \"\${$vardef}\" && export $var"
	done

	eval "$GIT_PAGER" '"$@"'
}

sane_grep () {
	GREP_OPTIONS= LC_ALL=C grep @@SANE_TEXT_GREP@@ "$@"
}

sane_egrep () {
	GREP_OPTIONS= LC_ALL=C egrep @@SANE_TEXT_GREP@@ "$@"
}

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

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

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

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

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

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

	if ! git diff-index --cached --quiet --ignore-submodules HEAD --
	then
		if test $err = 0
		then
			action=$1
			case "$action" in
			rebase)
				gettextln "Cannot rebase: Your index contains uncommitted changes." >&2
				;;
			"pull with rebase")
				gettextln "Cannot pull with rebase: Your index contains uncommitted changes." >&2
				;;
			*)
				eval_gettextln "Cannot \$action: Your index contains uncommitted changes." >&2
				;;
			esac
		else
		    gettextln "Additionally, your index contains uncommitted changes." >&2
		fi
		err=1
	fi

	if test $err = 1
	then
		test -n "$2" && echo "$2" >&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 "--pretty=raw").
#
# The first argument specifies the ident line to parse (e.g., "author"), and
# the second specifies the environment variable to put it in (e.g., "AUTHOR"
# for "GIT_AUTHOR_*"). Multiple pairs can be given to parse author and
# committer.
pick_ident_script () {
	while test $# -gt 0
	do
		lid=$1; shift
		uid=$1; shift
		printf '%s' "
		/^$lid /{
			s/'/'\\\\''/g
			h
			s/^$lid "'\([^<]*\) <[^>]*> .*$/\1/'"
			s/.*/GIT_${uid}_NAME='&'/p

			g
			s/^$lid "'[^<]* <\([^>]*\)> .*$/\1/'"
			s/.*/GIT_${uid}_EMAIL='&'/p

			g
			s/^$lid "'[^<]* <[^>]*> \(.*\)$/@\1/'"
			s/.*/GIT_${uid}_DATE='&'/p
		}
		"
	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 "$(pick_ident_script "$@")"
}

# 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=$(git config i18n.commitencoding || echo UTF-8)
	git show -s --pretty=raw --encoding="$encoding" "$1" -- |
	parse_ident_from_commit author AUTHOR
}

# Clear repo-local GIT_* environment variables. Useful when switching to
# another repository (e.g. when entering a submodule). See also the env
# list in git_connect()
clear_local_git_env() {
	unset $(git rev-parse --local-env-vars)
}

# 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 <"$1")
	@@DIFF@@ -u -La/"$1" -Lb/"$1" "$1" "$2" | git apply --no-add
	sz1=$(wc -c <"$1")

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


# Platform specific tweaks to work around some commands
case $(uname -s) in
*MINGW*)
	# Windows has its own (incompatible) sort and find
	sort () {
		/usr/bin/sort "$@"
	}
	find () {
		/usr/bin/find "$@"
	}
	# git sees Windows-style pwd
	pwd () {
		builtin pwd -W
	}
	is_absolute_path () {
		case "$1" in
		[/\\]* | [A-Za-z]:*)
			return 0 ;;
		esac
		return 1
	}
	;;
*)
	is_absolute_path () {
		case "$1" 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=$(git rev-parse --git-dir) || exit
	if [ -z "$SUBDIRECTORY_OK" ]
	then
		test -z "$(git rev-parse --show-cdup)" || {
			exit=$?
			gettextln "You need to run this command from the toplevel of the working tree." >&2
			exit $exit
		}
	fi
	test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || {
		gettextln "Unable to determine absolute path of git directory" >&2
		exit 1
	}
	: "${GIT_OBJECT_DIRECTORY="$(git rev-parse --git-path objects)"}"
}

if test -z "$NONGIT_OK"
then
	git_dir_init
fi

peel_committish () {
	case "$1" in
	:/*)
		peeltmp=$(git rev-parse --verify "$1") &&
		git rev-parse --verify "${peeltmp}^0"
		;;
	*)
		git rev-parse --verify "${1}^0"
		;;
	esac
}
Commit	Line	Data
11d62145 JN	1	# This shell scriplet is meant to be included by other shell scripts
	2	# to set up some variables pointing at the normal git directories and
	3	# a few helper shell functions.
b33e9666	4
365527ad	5	# Having this variable in your environment would break scripts because
e598c517	6	# you would cause "cd" to be taken to unexpected places. If you
365527ad JH	7	# like CDPATH, define it for your interactive shell sessions without
365527ad JH	8	# exporting it.
785063e0	9	# But we protect ourselves from such a user mistake nevertheless.
365527ad JH	10	unset CDPATH
365527ad JH	11
393050c3 JH	12	# Similarly for IFS, but some shells (e.g. FreeBSD 7.2) are buggy and
	13	# do not equate an unset IFS with IFS with the default, so here is
	14	# an explicit SP HT LF.
	15	IFS='
	16	'
785063e0	17
61dbb3c4 JH	18	git_broken_path_fix () {
	19	case ":$PATH:" in
	20	:$1:) : ok ;;
	21	*)
	22	PATH=$(
	23	SANE_TOOL_PATH="$1"
	24	IFS=: path= sep=
	25	set x $PATH
	26	shift
	27	for elem
	28	do
	29	case "$SANE_TOOL_PATH:$elem" in
	30	(?:/bin \| ?:/usr/bin)
	31	path="$path$sep$SANE_TOOL_PATH"
	32	sep=:
	33	SANE_TOOL_PATH=
	34	esac
	35	path="$path$sep$elem"
	36	sep=:
	37	done
	38	echo "$path"
	39	)
	40	;;
	41	esac
	42	}
	43
	44	# @@BROKEN_PATH_FIX@@
0e0aea5a	45
1073094f AK	46	# Source git-sh-i18n for gettext support.
	47	. "$(git --exec-path)/git-sh-i18n"
	48
adb231cf FG	49	die () {
	50	die_with_status 1 "$@"
	51	}
	52
	53	die_with_status () {
	54	status=$1
	55	shift
89b0230a	56	printf >&2 '%s\n' "$*"
adb231cf	57	exit "$status"
b33e9666 LT	58	}
b33e9666 LT	59
e064c170 SB	60	GIT_QUIET=
	61
	62	say () {
	63	if test -z "$GIT_QUIET"
	64	then
	65	printf '%s\n' "$*"
	66	fi
	67	}
	68
bac199b7 PH	69	if test -n "$OPTIONS_SPEC"; then
bac199b7 PH	70	usage() {
5d292756 JH	71	"$0" -h
5d292756 JH	72	exit 1
bac199b7 PH	73	}
bac199b7 PH	74
e817e3e8 PH	75	parseopt_extra=
	76	[ -n "$OPTIONS_KEEPDASHDASH" ] &&
	77	parseopt_extra="--keep-dashdash"
51ba8ce3 NV	78	[ -n "$OPTIONS_STUCKLONG" ] &&
51ba8ce3 NV	79	parseopt_extra="$parseopt_extra --stuck-long"
e817e3e8 PH	80
e817e3e8 PH	81	eval "$(
cbea86fd	82	echo "$OPTIONS_SPEC" \|
e817e3e8 PH	83	git rev-parse --parseopt $parseopt_extra -- "$@" \|\|
	84	echo exit $?
	85	)"
bac199b7	86	else
7d665f35	87	dashless=$(basename -- "$0" \| sed -e 's/-/ /')
bac199b7	88	usage() {
d323c6b6	89	die "$(eval_gettext "usage: \$dashless \$USAGE")"
bac199b7 PH	90	}
	91
	92	if [ -z "$LONG_USAGE" ]
	93	then
d323c6b6	94	LONG_USAGE="$(eval_gettext "usage: \$dashless \$USAGE")"
bac199b7	95	else
d323c6b6	96	LONG_USAGE="$(eval_gettext "usage: \$dashless \$USAGE
bac199b7	97
d323c6b6	98	$LONG_USAGE")"
bac199b7 PH	99	fi
	100
	101	case "$1" in
87182b17	102	-h)
bac199b7 PH	103	echo "$LONG_USAGE"
	104	exit
	105	esac
	106	fi
d025524d	107
c3e2d189 JH	108	# Set the name of the end-user facing command in the reflog when the
	109	# script may update refs. When GIT_REFLOG_ACTION is already set, this
	110	# will not overwrite it, so that a scripted Porcelain (e.g. "git
	111	# rebase") can set it to its own name (e.g. "rebase") and then call
	112	# another scripted Porcelain (e.g. "git am") and a call to this
	113	# function in the latter will keep the name of the end-user facing
	114	# program (e.g. "rebase") in GIT_REFLOG_ACTION, ensuring whatever it
	115	# does will be record as actions done as part of the end-user facing
	116	# operation (e.g. "rebase").
	117	#
	118	# NOTE NOTE NOTE: consequently, after assigning a specific message to
	119	# GIT_REFLOG_ACTION when calling a "git" command to record a custom
	120	# reflog message, do not leave that custom value in GIT_REFLOG_ACTION,
	121	# after you are done. Other callers of "git" commands that rely on
	122	# writing the default "program name" in reflog expect the variable to
	123	# contain the value set by this function.
	124	#
	125	# To use a custom reflog message, do either one of these three:
	126	#
	127	# (a) use a single-shot export form:
	128	# GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: preparing frotz" \
	129	# git command-that-updates-a-ref
	130	#
	131	# (b) save the original away and restore:
	132	# SAVED_ACTION=$GIT_REFLOG_ACTION
	133	# GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: preparing frotz"
	134	# git command-that-updates-a-ref
	135	# GIT_REFLOG_ACITON=$SAVED_ACTION
	136	#
	137	# (c) assign the variable in a subshell:
	138	# (
	139	# GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: preparing frotz"
	140	# git command-that-updates-a-ref
	141	# )
f9474132 SP	142	set_reflog_action() {
	143	if [ -z "${GIT_REFLOG_ACTION:+set}" ]
	144	then
	145	GIT_REFLOG_ACTION="$*"
	146	export GIT_REFLOG_ACTION
	147	fi
	148	}
	149
ef0c2abf	150	git_editor() {
b4479f07 JN	151	if test -z "${GIT_EDITOR:+set}"
	152	then
	153	GIT_EDITOR="$(git var GIT_EDITOR)" \|\| return $?
	154	fi
	155
	156	eval "$GIT_EDITOR" '"$@"'
ef0c2abf AR	157	}
ef0c2abf AR	158
f6dff119 JN	159	git_pager() {
	160	if test -t 1
	161	then
	162	GIT_PAGER=$(git var GIT_PAGER)
	163	else
	164	GIT_PAGER=cat
	165	fi
995bc22d EW	166	for vardef in @@PAGER_ENV@@
	167	do
	168	var=${vardef%%=*}
	169	eval ": \"\${$vardef}\" && export $var"
	170	done
f6dff119 JN	171
	172	eval "$GIT_PAGER" '"$@"'
	173	}
	174
e1622bfc	175	sane_grep () {
71b40103	176	GREP_OPTIONS= LC_ALL=C grep @@SANE_TEXT_GREP@@ "$@"
e1622bfc JH	177	}
	178
	179	sane_egrep () {
71b40103	180	GREP_OPTIONS= LC_ALL=C egrep @@SANE_TEXT_GREP@@ "$@"
e1622bfc JH	181	}
e1622bfc JH	182
4b441f47	183	is_bare_repository () {
5be60078	184	git rev-parse --is-bare-repository
4b441f47 JH	185	}
4b441f47 JH	186
9fde9401	187	cd_to_toplevel () {
91dc602d SD	188	cdup=$(git rev-parse --show-toplevel) &&
91dc602d SD	189	cd "$cdup" \|\| {
d323c6b6	190	gettextln "Cannot chdir to \$cdup, the toplevel of the working tree" >&2
91dc602d SD	191	exit 1
91dc602d SD	192	}
9fde9401 JH	193	}
9fde9401 JH	194
e2eb5273 JH	195	require_work_tree_exists () {
	196	if test "z$(git rev-parse --is-bare-repository)" != zfalse
	197	then
d323c6b6	198	program_name=$0
acefe2be	199	die "$(eval_gettext "fatal: \$program_name cannot be used without a working tree.")"
e2eb5273 JH	200	fi
	201	}
	202
7eff28a9	203	require_work_tree () {
d323c6b6 VA	204	test "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = true \|\| {
d323c6b6 VA	205	program_name=$0
acefe2be	206	die "$(eval_gettext "fatal: \$program_name cannot be used without a working tree.")"
d323c6b6	207	}
7eff28a9 SP	208	}
7eff28a9 SP	209
92c62a3f RR	210	require_clean_work_tree () {
	211	git rev-parse --verify HEAD >/dev/null \|\| exit 1
	212	git update-index -q --ignore-submodules --refresh
	213	err=0
	214
	215	if ! git diff-files --quiet --ignore-submodules
	216	then
d323c6b6 VA	217	action=$1
	218	case "$action" in
	219	rebase)
	220	gettextln "Cannot rebase: You have unstaged changes." >&2
	221	;;
	222	"rewrite branches")
	223	gettextln "Cannot rewrite branches: You have unstaged changes." >&2
	224	;;
	225	"pull with rebase")
	226	gettextln "Cannot pull with rebase: You have unstaged changes." >&2
	227	;;
	228	*)
	229	eval_gettextln "Cannot \$action: You have unstaged changes." >&2
	230	;;
	231	esac
92c62a3f RR	232	err=1
	233	fi
	234
	235	if ! git diff-index --cached --quiet --ignore-submodules HEAD --
	236	then
d323c6b6	237	if test $err = 0
92c62a3f	238	then
d323c6b6 VA	239	action=$1
	240	case "$action" in
	241	rebase)
	242	gettextln "Cannot rebase: Your index contains uncommitted changes." >&2
	243	;;
	244	"pull with rebase")
	245	gettextln "Cannot pull with rebase: Your index contains uncommitted changes." >&2
	246	;;
	247	*)
	248	eval_gettextln "Cannot \$action: Your index contains uncommitted changes." >&2
	249	;;
	250	esac
92c62a3f	251	else
d323c6b6	252	gettextln "Additionally, your index contains uncommitted changes." >&2
92c62a3f RR	253	fi
	254	err=1
	255	fi
	256
d323c6b6	257	if test $err = 1
92c62a3f	258	then
d323c6b6	259	test -n "$2" && echo "$2" >&2
92c62a3f RR	260	exit 1
	261	fi
	262	}
	263
ce80ca56 JK	264	# Generate a sed script to parse identities from a commit.
	265	#
	266	# Reads the commit from stdin, which should be in raw format (e.g., from
	267	# cat-file or "--pretty=raw").
	268	#
	269	# The first argument specifies the ident line to parse (e.g., "author"), and
	270	# the second specifies the environment variable to put it in (e.g., "AUTHOR"
	271	# for "GIT_AUTHOR_*"). Multiple pairs can be given to parse author and
	272	# committer.
	273	pick_ident_script () {
	274	while test $# -gt 0
	275	do
	276	lid=$1; shift
	277	uid=$1; shift
	278	printf '%s' "
	279	/^$lid /{
	280	s/'/'\\\\''/g
	281	h
	282	s/^$lid "'\([^<]\) <[^>]> .*$/\1/'"
	283	s/.*/GIT_${uid}_NAME='&'/p
	284
	285	g
	286	s/^$lid "'[^<]* <\([^>]\)> .$/\1/'"
	287	s/.*/GIT_${uid}_EMAIL='&'/p
	288
	289	g
	290	s/^$lid "'[^<]* <[^>]> \(.\)$/@\1/'"
	291	s/.*/GIT_${uid}_DATE='&'/p
	292	}
	293	"
	294	done
	295	echo '/^$/q'
	296	}
	297
	298	# Create a pick-script as above and feed it to sed. Stdout is suitable for
	299	# feeding to eval.
	300	parse_ident_from_commit () {
	301	LANG=C LC_ALL=C sed -ne "$(pick_ident_script "$@")"
	302	}
	303
	304	# Parse the author from a commit given as an argument. Stdout is suitable for
	305	# feeding to eval to set the usual GIT_* ident variables.
0cae2346	306	get_author_ident_from_commit () {
0cae2346	307	encoding=$(git config i18n.commitencoding \|\| echo UTF-8)
077b725f	308	git show -s --pretty=raw --encoding="$encoding" "$1" -- \|
ce80ca56	309	parse_ident_from_commit author AUTHOR
0cae2346 JS	310	}
0cae2346 JS	311
7d750f0e GB	312	# Clear repo-local GIT_* environment variables. Useful when switching to
	313	# another repository (e.g. when entering a submodule). See also the env
	314	# list in git_connect()
	315	clear_local_git_env() {
	316	unset $(git rev-parse --local-env-vars)
	317	}
	318
4549162e KB	319	# Generate a virtual base file for a two-file merge. Uses git apply to
	320	# remove lines from $1 that are not in $2, leaving only common lines.
	321	create_virtual_base() {
	322	sz0=$(wc -c <"$1")
	323	@@DIFF@@ -u -La/"$1" -Lb/"$1" "$1" "$2" \| git apply --no-add
	324	sz1=$(wc -c <"$1")
	325
	326	# If we do not have enough common material, it is not
	327	# worth trying two-file merge using common subsections.
	328	expr $sz0 \< $sz1 \* 2 >/dev/null \|\| : >"$1"
	329	}
	330
87bddba9	331
10587ce6	332	# Platform specific tweaks to work around some commands
87bddba9 JS	333	case $(uname -s) in
	334	MINGW)
	335	# Windows has its own (incompatible) sort and find
	336	sort () {
	337	/usr/bin/sort "$@"
	338	}
	339	find () {
	340	/usr/bin/find "$@"
	341	}
be39048a RJ	342	# git sees Windows-style pwd
	343	pwd () {
	344	builtin pwd -W
	345	}
5e9677cb PT	346	is_absolute_path () {
	347	case "$1" in
	348	[/\\]* \| [A-Za-z]:*)
	349	return 0 ;;
	350	esac
	351	return 1
	352	}
87bddba9	353	;;
5e9677cb PT	354	*)
	355	is_absolute_path () {
	356	case "$1" in
	357	/*)
	358	return 0 ;;
	359	esac
	360	return 1
	361	}
87bddba9	362	esac
10587ce6 JH	363
	364	# Make sure we are in a valid repository of a vintage we understand,
	365	# if we require to be in a git repository.
1c7e2d23	366	git_dir_init () {
10587ce6 JH	367	GIT_DIR=$(git rev-parse --git-dir) \|\| exit
	368	if [ -z "$SUBDIRECTORY_OK" ]
	369	then
	370	test -z "$(git rev-parse --show-cdup)" \|\| {
	371	exit=$?
d323c6b6	372	gettextln "You need to run this command from the toplevel of the working tree." >&2
10587ce6 JH	373	exit $exit
	374	}
	375	fi
	376	test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) \|\| {
d323c6b6	377	gettextln "Unable to determine absolute path of git directory" >&2
10587ce6 JH	378	exit 1
10587ce6 JH	379	}
01247e02	380	: "${GIT_OBJECT_DIRECTORY="$(git rev-parse --git-path objects)"}"
1c7e2d23 DA	381	}
	382
	383	if test -z "$NONGIT_OK"
	384	then
	385	git_dir_init
10587ce6	386	fi
bac1ddd0 RR	387
	388	peel_committish () {
	389	case "$1" in
	390	:/*)
	391	peeltmp=$(git rev-parse --verify "$1") &&
	392	git rev-parse --verify "${peeltmp}^0"
	393	;;
	394	*)
	395	git rev-parse --verify "${1}^0"
	396	;;
	397	esac
	398	}