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
build: allow automatic git submodule updates to be disabled Some people building QEMU use VPATH builds where the source directory is on a read-only volume. In such a case 'scripts/git-submodules.sh update' will always fail and users are required to run it manually themselves on their original writable source directory. While this is already supported, it is nice to give users a command line flag to configure to permanently disable automatic submodule updates, as it means they won't get hard to diagnose failures from git-submodules.sh at an arbitrary later date. This patch thus introduces a flag '--disable-git-update' which will prevent 'make' from ever running 'scripts/git-submodules.sh update'. It will still run the 'status' command to determine if a submodule update is needed, but when it does this it'll simply stop and print a message instructing the developer what todo. eg $ ./configure --target-list=x86_64-softmmu --disable-git-update ...snip... $ make GEN config-host.h GEN trace/generated-tcg-tracers.h GEN trace/generated-helpers-wrappers.h GEN trace/generated-helpers.h GEN trace/generated-helpers.c GEN module_block.h GIT submodule checkout is out of date. Please run scripts/git-submodule.sh update ui/keycodemapdb from the source directory checkout /home/berrange/src/virt/qemu make: *** [Makefile:31: git-submodule-update] Error 1 Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-10-26 15:52:26 +03:00
echo "Alternatively you may disable automatic GIT submodule checkout"
echo "with:"
echo
echo " $ ./configure --disable-git-update"
build: allow automatic git submodule updates to be disabled Some people building QEMU use VPATH builds where the source directory is on a read-only volume. In such a case 'scripts/git-submodules.sh update' will always fail and users are required to run it manually themselves on their original writable source directory. While this is already supported, it is nice to give users a command line flag to configure to permanently disable automatic submodule updates, as it means they won't get hard to diagnose failures from git-submodules.sh at an arbitrary later date. This patch thus introduces a flag '--disable-git-update' which will prevent 'make' from ever running 'scripts/git-submodules.sh update'. It will still run the 'status' command to determine if a submodule update is needed, but when it does this it'll simply stop and print a message instructing the developer what todo. eg $ ./configure --target-list=x86_64-softmmu --disable-git-update ...snip... $ make GEN config-host.h GEN trace/generated-tcg-tracers.h GEN trace/generated-helpers-wrappers.h GEN trace/generated-helpers.h GEN trace/generated-helpers.c GEN module_block.h GIT submodule checkout is out of date. Please run scripts/git-submodule.sh update ui/keycodemapdb from the source directory checkout /home/berrange/src/virt/qemu make: *** [Makefile:31: git-submodule-update] Error 1 Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-10-26 15:52:26 +03:00
echo
echo "and then manually update submodules prior to running make, with:"
echo
echo " $ scripts/git-sbumodule.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
CURSTATUS=`$GIT submodule status $modules`
OLDSTATUS=`cat $substat`
test "$CURSTATUS" = "$OLDSTATUS"
exit $?
;;
update)
if test -z "$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