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run_chroot_version_hooks: sanity check for multiple upgrades hooks

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If people land upgrade hooks of the same version levels independently and
no one notices, we get into an inconsistent state where only one of the
hooks actually runs.  Add a sanity check so we bail rather than upgrading
the chroot with an arbitrarily picked script.

BUG=None
TEST=run build_packages with multiple 17_xxx files in a ver 16 chroot and see script error out
TEST=run build_packages with single 17_xxx file in a ver 16 chroot and see successful run

Change-Id: If9a71f60badb7c9643c1a03ad49bb23ffb64f341
Reviewed-on: https://gerrit.chromium.org/gerrit/11972
Reviewed-by: Zdenek Behan <zbehan@chromium.org>
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
This commit is contained in:
Mike Frysinger 2011-11-19 01:57:03 -05:00 committed by Gerrit
parent f331598aa9
commit 7cd3c285d2
1 changed files with 15 additions and 3 deletions
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18
run_chroot_version_hooks
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@ -110,17 +110,29 @@ if [ "${LATEST_VERSION}" -gt "${CHROOT_VERSION}" ]; then
pushd "${UPGRADE_D}" 1> /dev/null
for n in $(seq "$(expr ${CHROOT_VERSION} + 1)" "${LATEST_VERSION}"); do
hook=(${n}_*)
# Sanity check: if there are multiple ${n}_* files, then CL's landed
# at the same time and people didn't notice. Let's notice for them.
if [ ${#hook[@]} -gt 1 ]; then
error "Fatal: Upgrade ${n} has multiple hooks:"
error " ${hook[*]}"
error "Connor MacLeod knows: There can be only one."
exit 1
fi
hook=${hook[0]}
# Deprecation check; Deprecation can be done by removing old upgrade
# scripts and causing too old chroots to have to start over.
# Upgrades have to form a continuous sequence.
if ! [ -f ${n}_* ]; then
if ! [ -f ${hook} ]; then
error "Fatal: Upgrade ${n} doesn't exist."
error "Your chroot is so old, that some updates have been deprecated!"
error "You need to re-create it!"
exit 1
fi
info "Rollup $(echo ${n}_*)"
info "Rollup ${hook}"
# Attempt the upgrade.
# NOTE: We source the upgrade scripts because:
@ -129,7 +141,7 @@ if [ "${LATEST_VERSION}" -gt "${CHROOT_VERSION}" ]; then
# Side effect is that the scripts have to be internally enclosed in
# a code block, otherwise simply running "exit" in any of them would
# terminate the master script, so we call it in a subshell.
if ! ( source ${n}_* ); then
if ! ( source ${hook} ); then
error "Fatal: failed to upgrade ${n}!"
exit 1
fi