qemu/scripts/git-submodule.sh

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#!/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=$1
shift
maybe_modules="$@"
test -z "$GIT" && GIT=git
error() {
echo "$0: $*"
echo
echo "Unable to automatically checkout GIT submodules '$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 --disable-git-update"
echo
echo "and then manually update submodules prior to running make, with:"
echo
echo " $ scripts/git-submodule.sh update $modules"
echo
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 "$0: unexpectedly called with submodules but no git checkout exists"
exit 1
fi
case "$command" in
status)
if test -z "$maybe_modules"
then
test -s ${substat} && exit 1 || exit 0
fi
test -f "$substat" || exit 1
for module in $modules; do
CURSTATUS=$($GIT submodule status $module)
OLDSTATUS=$(cat $substat | grep $module)
if test "$CURSTATUS" != "$OLDSTATUS"; then
exit 1
fi
done
exit 0
;;
update)
if test -z "$maybe_modules"
then
test -e $substat || touch $substat
exit 0
fi
$GIT submodule update --init $modules 1>/dev/null
test $? -ne 0 && error "failed to update modules"
$GIT submodule status $modules > "${substat}"
test $? -ne 0 && error "failed to save git submodule status" >&2
;;
esac
exit 0