flatcar-scripts/checkout
flatcar-ci fa090f839e checkout: omit checking for tags in submodules
Signed-off-by: flatcar-ci <infra+ci@flatcar-linux.org>
2022-01-10 15:23:25 +01:00

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#!/bin/bash
#
# Copyright (c) 2021 The Flatcar Maintainers.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
set -eu
force_tag="false"
force_branch="false"
update_strategy="fast-forward"
name=""
usage() {
echo " Usage:"
echo " $0 [-t|-b] [-n] [-u <strategy>] <tag-or-branch>"
echo " Check our a tag or branch and synchronise git submodules"
echo " coreos-overlay and portage-stable."
echo " By default, $0 tries to auto-detect whether to handle a tag or a branch,"
echo " with tags being prioritised over branches of the same name."
echo
echo " <tag-or-branch> Name of the tag or branch to check out."
echo " BRANCH: Check out the branch in scripts, coreos-overlay"
echo " and portage-stable, and fast-forward to the"
echo " latest changes by default (but see '-u' below)."
echo " TAG: Check out the tag in scripts, and update submodules."
echo
echo " -t force TAG mode. Branches of the given name are ignored."
echo " Mutually exclusive with '-b'."
echo " -b force BRANCH mode. Tags of the given name are ignored."
echo " Mutually exclusive with '-t'."
echo
echo " -u <strategy> Only applies to BRANCH checkouts."
echo " When checking out submodule branches, use <strategy>."
echo " instead of fast-forward. Strategy is one of:"
echo " 'fast-forward' - fast-forward to upstream branch tip. Default."
echo " 'rebase' - rebase local changes on upstream changes."
echo " Useful for keepling local changes in submodules."
echo " 'omit' - check out branches, but do not update."
echo " Defaults to '$update_strategy'"
echo
echo " -h Print this help."
echo
}
# --
while [ 0 -lt $# ] ; do
case "$1" in
-h) usage; exit 0;;
-t) force_tag="true"; shift;;
-b) force_branch="true"; shift;;
-u) update_strategy="$2"; shift; shift;;
*) if [ -n "$name" ] ; then
echo
echo "ERROR: only ONE tag-or-branch can be specified."
echo
usage
exit 1
fi
name="$1"; shift;;
esac
done
if [ -z "$name" ] ; then
usage
exit 0
fi
if $force_branch && $force_tag; then
echo
echo "ERROR: '-t' and '-b' are mutually exclusive. Please make up your mind."
echo
usage
exit 1
fi
case "$update_strategy" in
fast-forward) update_strategy="--ff-only";;
rebase) update_strategy="--rebase";;
omit) update_strategy="";;
*) echo
echo "ERROR: unsupported branch update strategy '$update_strategy'."
echo
usage
exit 1;;
esac
# --
# make sure submodules are initialised
git submodule init
for dir in sdk_container/src/third_party/coreos-overlay \
sdk_container/src/third_party/portage-stable ; do
if [ ! -f "$dir"/.git ] ; then
git submodule update -N "$dir"
fi
done
function check_all() {
local gitcmd="$1"
local name="$2"
local scripts="$(git $gitcmd \
| sed -e 's/^[[:space:]]*//' -e 's:remotes/[^/]\+/::' \
| grep -m1 -E "^$name\$")"
# tag has submodules pinned, no need to check
if [[ "${gitcmd}" =~ ^tag\ .* ]] ; then
echo "${scripts}"
return
fi
local overlay="$(git -C sdk_container/src/third_party/coreos-overlay $gitcmd \
| sed -e 's/^[[:space:]]*//' -e 's:remotes/[^/]\+/::' \
| grep -m1 -E "^$name\$")"
local portage="$(git -C sdk_container/src/third_party/portage-stable $gitcmd \
| sed -e 's/^[[:space:]]*//' -e 's:remotes/[^/]\+/::' \
| grep -m1 -E "^$name\$")"
if [ -n "$scripts" -a -n "$overlay" -a -n "$portage" ] ; then
echo "$scripts"
fi
}
# --
#
# TAG
#
if ! $force_branch; then
for dir in . \
sdk_container/src/third_party/coreos-overlay \
sdk_container/src/third_party/portage-stable ; do
git -C "$dir" fetch --tags --force --prune --prune-tags
done
tag="$(check_all 'tag -l' "$name")"
if [ -n "$tag" ] ; then
echo
echo "Checking out TAG '$tag'"
echo "----------------------------------"
git checkout "$tag"
git submodule update
exit
fi
fi
echo "No tag by name '$name' in repo + submodules."
if $force_tag; then
echo "Tag-only mode forced, exiting."
exit 1
fi
#
# BRANCH
#
branch="$(check_all "branch -a -l" "$name")"
if [ -z "$branch" ]; then
echo "No branch by name '$name' in repo + submodules."
exit 1
fi
echo
echo "Checking out BRANCH '$branch'"
echo "----------------------------------"
for dir in . \
sdk_container/src/third_party/coreos-overlay \
sdk_container/src/third_party/portage-stable ; do
git -C "$dir" checkout "$branch"
if [ -n "$update_strategy" ] ; then
echo "updating branch in '$dir' /'$update_strategy')"
git -C "$dir" pull "$update_strategy"
fi
done