#!/bin/sh
#
# This code is licensed under the GPL version 2 or later. See
# the COPYING file in the top-level directory.

substat=".git-submodule-status"

command=1ドル
shift
maybe_modules="$@"

# if --with-git-submodules=ignore, do nothing
test "$command" = "ignore" && exit 0

test -z "$GIT" && GIT=git

cd "$(dirname "0ドル")/.."

update_error() {
 echo "0ドル: $*"
 echo
 echo "Unable to automatically checkout GIT submodules '$modules'."
 echo "If you require use of an alternative GIT binary (for example to"
 echo "enable use of a transparent proxy), then please specify it by"
 echo "running configure by with the '--with-git' argument. e.g."
 echo
 echo " $ ./configure --with-git='tsocks git'"
 echo
 echo "Alternatively you may disable automatic GIT submodule checkout"
 echo "with:"
 echo
 echo " $ ./configure --with-git-submodules=validate"
 echo
 echo "and then manually update submodules prior to running make, with:"
 echo
 echo " $ scripts/git-submodule.sh update $modules"
 echo
 exit 1
}

validate_error() {
 if test "1ドル" = "validate"; then
echo "GIT submodules checkout is out of date, and submodules"
 echo "configured for validate only. Please run"
 echo " scripts/git-submodule.sh update $maybe_modules"
 echo "from the source directory or call configure with"
 echo " --with-git-submodules=update"
 echo "To disable GIT submodules validation, use"
 echo " --with-git-submodules=ignore"
 fi
exit 1
}

modules=""
for m in $maybe_modules
do
 $GIT submodule status $m 1> /dev/null 2>&1
 if test $? = 0
 then
modules="$modules$m"
 else
echo "warn: ignoring non-existent submodule $m"
 fi
done

if test -n "$maybe_modules" && ! test -e ".git"
then
echo "0ドル: unexpectedly called with submodules but no git checkout exists"
 exit 1
fi

case "$command" in
status|validate)
 if test -z "$maybe_modules"
 then
test -s ${substat} && validate_error "$command" || exit 0
 fi

test -f "$substat" || validate_error "$command"
 for module in $modules; do
CURSTATUS=$($GIT submodule status $module)
 OLDSTATUS=$(cat $substat | grep $module)
 if test "$CURSTATUS" != "$OLDSTATUS"; then
validate_error "$command"
 fi
 done
exit 0
 ;;
update)
 if test -z "$maybe_modules"
 then
test -e $substat || touch $substat
 exit 0
 fi

 $GIT submodule update --init $modules 1>/dev/null
 test $? -ne 0 && update_error "failed to update modules"

 $GIT submodule status $modules > "${substat}"
 test $? -ne 0 && update_error "failed to save git submodule status" >&2
 ;;
esac

exit 0