#!/bin/sh

if test -z "$GIT"
then
	case "$(git version 2>/dev/null)" in
	"git version"*)
		GIT=git ;;
	*)
		echo >&2 "No git to bootstrap"
		exit 1 ;;
	esac
fi

inst_prefix=$(
	IFS=:
	for p in $PATH
	do
		probed=${p%/git-active/bin}
		if test "$probed" != "$p"
		then
			echo "$probed"
			exit
		fi
	done
	echo $HOME
)

LANG=C
old_style_def_fix=b79d18c92d9f4841a6a1a29b7b2373a8ff9871e1

: ${O=-O2}

for cv in PYTHON_PATH=python TCL_PATH=tclsh TCLTKPATH=wish
do
	cmd=${cv#*=}
	var=${cv%=*}
	eval $(
		if test -f "/usr/bin/$cmd"
		then
			break
		fi
		for p in /usr/bin /usr/local/bin
		do
			if test -f "$p/$cmd"
			then
				echo "$var=$p/$cmd; export $var"
				break
			fi
			found=$(find "$p/$cmd"* -type f 2>/dev/null | head -n 1)
			if test -f "$found"
			then
				echo "$var=$found; export $var"
				break
			fi
		done
	)
done

Wall='-Wall -Wdeclaration-after-statement'
tests= jobs= skip= oldtest=

case `uname` in
OpenBSD)
	O="-fgnu89-inline"
	skip="t9402"
	;;
NetBSD)
	OLD_ICONV=YesPlease; export OLD_ICONV
	skip="t5000 t9402"
	;;
FreeBSD)
	OLD_ICONV=YesPlease; export OLD_ICONV
	skip="t5560"
	;;
SunOS)
	NEEDS_CRYPTO_WITH_SSL=YesPlease ; export NEEDS_CRYPTO_WITH_SSL
	NO_PEDANTIC=CannotDo Wall=
	;;
esac

old_style_def_fix () {
	rev=$($GIT rev-parse HEAD 2>/dev/null) &&
	case "$($GIT merge-base "$old_style_def_fix" "$rev")" in
	$old_style_def_fix)
		printf "%s\n" "-Wold-style-definition"
		;;
	esac
}

determine_branch () {
	expr "$($GIT symbolic-ref HEAD 2>/dev/null)" : 'refs/heads/\(.*\)' ||
	echo detached
}

determine_version () {
	v=`$GIT describe HEAD`
	expr "$v" : '.*-g[0-9a-f]*$' >/dev/null && {
		echo >&2 "You are on 'snap' but $v is not an official version."
		exit 1
	}
	echo "$v"
}

determine_long_version () {
	$GIT describe HEAD 2>/dev/null || echo unknown-g00000000 |
	sed -e 's/-/./g'
}

while case $# in 0) break ;; esac
do 
	case "$1" in
	-pedantic | --pedantic)
		case "$NO_PEDANTIC" in
		?*)	;;
		'')
			O="$O -Werror $(old_style_def_fix) -std=c99"
			O="$O -Wno-pointer-to-int-cast"
			O="$O -Wpointer-arith -Woverflow -Wunused"
			;;
		esac
		# -Wvla
		# O="$O -fwrapv -fno-strict-overflow"
		;;
	-j*)
		case "$NO_JOBS" in
		?*)	jobs= ;;
		'')	jobs=$1 ;;
		esac
		;;
	-noprove | --noprove)
		oldtest=t
		;;
	-loose | --loose)
		Wall=
		;;
	--locale=*)
		LANG=${1#*=}
		;;
	--test=*)
		tests=$(
			cd t &&
			for t in ${1#*=}
			do
				eval echo "t$t-*.sh"
			done | tr '\012' ' '
		)
		;;
	--)
		shift
		break
		;;
	-*)
		echo >&2 "Eh $1?"
		exit 1
		;;
	*)
		break
		;;		
	esac
	shift
done

if test -z "$tests" && test -n "$skip"
then
	GIT_SKIP_TESTS="${GIT_SKIP_TESTS:-$skip}"
	export GIT_SKIP_TESTS
fi
if test -z "$oldtest" &&
   sh -c 'prove --version >/dev/null 2>&1' &&
   sh -c 'prove --exec : >/dev/null 2>&1'
then
        DEFAULT_TEST_TARGET=prove GIT_PROVE_OPTS="$jobs"
        export DEFAULT_TEST_TARGET GIT_PROVE_OPTS
fi

LC_ALL=$LANG
export LANG LC_ALL

branch=$(determine_branch)

case "$branch" in
next | maint | master | pu | jch)
	prefix="$inst_prefix/git-$branch"
	;;
snap)
	v=$(determine_version)
	prefix="$inst_prefix/git-snap-$v"
	;;
*)
	prefix="$inst_prefix/git-test" ;;
esac
d="prefix=$prefix"

determine_long_version >version

d="$d "'
MAN_BASE_URL="http://www.kernel.org/pub/software/scm/git/docs/"
ASCIIDOC_NO_ROFF=YesPlease
ASCIIDOC8=YesPlease
BLK_SHA1=YesPlease
GNU_ROFF=YesPlease'

# Platform hack
if test -z "${make:+set}" && {
	test -x /usr/local/bin/gmake ||
	test -x /usr/pkg/bin/gmake ||
	test -x /usr/bin/gmake
}
then
	make=gmake
fi
if test -f /bin/ginstall
then
	set INSTALL=ginstall "$@"
fi

CFLAGS="$O $Wall -g"
OK_TO_USE_CFLAGS=Yes
if test -n "${NO_CFLAGS+set}"
then
	unset OK_TO_USE_CFLAGS
fi

${make-make} $d \
     ETC_GITCONFIG=$prefix/etc/gitconfig \
     ${OK_TO_USE_CFLAGS+"CFLAGS=$CFLAGS"} \
     ${tests:+"T=$tests"} \
     $jobs \
     "$@"
status=$?
rm -f version
exit $status