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[type/__uci_commit] Move uncommited changes check from explorer to code-remote

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This is done to prevent false positives/negatives (see NOTE in code)
This commit is contained in:
Dennis Camera 2020-07-05 10:25:36 +02:00
parent e7369a1f99
commit cc599dab15
2 changed files with 15 additions and 28 deletions
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22
cdist/conf/type/__uci_commit/explorer/changes
View file

@ -1,22 +0,0 @@
#!/bin/sh
#
# 2020 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
#
# This file is part of cdist.
#
# cdist is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# cdist is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with cdist. If not, see <http://www.gnu.org/licenses/>.
#
# This explorer outputs the uncommited UCI changes on the target.
uci changes

21
cdist/conf/type/__uci_commit/gencode-remote
View file

@ -23,19 +23,28 @@ batchfile="${__global:?}/tmp/__uci/${transaction_name}.txt"
test -s "${batchfile}" || exit 0
if test -s "${__object:?}/explorer/changes"
printf 'commit transaction %s\n' "${transaction_name}" >>"${__messages_out:?}"
# NOTE: Uncommited changes are checked in code-remote instead of in an explorer
# because in cdist there is no interlocking between explorers and code
# execution.
# Checking for uncommited changes in an explorer leaves a time slot in
# which changes made are not detected by the code.
# Furthermore an explorer running concurrently with another transactions
# code-remote could lead to a false positive.
cat <<CODE
changes=\$(uci changes)
if test -n "\${changes}"
then
echo 'Uncommited UCI changes were found on the target:'
cat "${__object:?}/explorer/changes"
echo
printf '%s\n\n' "\${changes}"
echo 'This can be caused by manual changes or due to a previous failed run.'
echo 'Please investigate the situation, revert or commit the changes, and try again.'
exit 1
fi >&2
printf 'commit transaction %s\n' "${transaction_name}" >>"${__messages_out:?}"
cat <<CODE
rollback() {
uci changes \\
| sed -e 's/\..*\$//' -e 's/^-//' \\