forked from ungleich-public/cdist
82 lines
2.3 KiB
Bash
Executable File
82 lines
2.3 KiB
Bash
Executable File
#!/bin/sh -e
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#
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# 2020 Dennis Camera (dennis.camera@ssrq-sds-fds.ch)
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#
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# This file is part of cdist.
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#
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# cdist is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# cdist is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with cdist. If not, see <http://www.gnu.org/licenses/>.
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#
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transaction_name=${__object_id:?}
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batchfile="${__global:?}/tmp/__uci/${transaction_name}.txt"
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test -s "${batchfile}" || exit 0
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printf 'commit transaction %s\n' "${transaction_name}" >>"${__messages_out:?}"
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# NOTE: Uncommited changes are checked in code-remote instead of in an explorer
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# because in cdist there is no interlocking between explorers and code
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# execution.
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# Checking for uncommited changes in an explorer leaves a time slot in
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# which changes made are not detected by the code.
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# Furthermore an explorer running concurrently with another transactions
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# code-remote could lead to a false positive.
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cat <<CODE
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changes=\$(uci changes)
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if test -n "\${changes}"
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then
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echo 'Uncommited UCI changes were found on the target:'
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printf '%s\n\n' "\${changes}"
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echo 'This can be caused by manual changes or due to a previous failed run.'
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echo 'Please investigate the situation, revert or commit the changes, and try again.'
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exit 1
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fi >&2
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check_errors() {
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# reads stdin and forwards non-empty lines to stderr.
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# returns 0 if stdin is empty, else 1.
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! grep -e . >&2
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}
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commit() {
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uci commit
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}
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rollback() {
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echo >&2
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echo 'An error occurred when trying to commit transaction ${transaction_name}!' >&2
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uci changes \\
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| sed -e 's/^-//' -e 's/\..*\$//' \\
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| sort -u \\
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| while read -r _package
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do
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uci revert "\${_package}"
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echo "\${_package}" # for logging
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done \\
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| awk '
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BEGIN { printf "Reverted changes in: " }
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{ printf "%s%s", (FNR > 1 ? ", " : ""), \$0 }
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END { printf "\\n" }' >&2
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return 1
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}
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uci batch <<'EOF' 2>&1 | check_errors && commit || rollback
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$(cat "${batchfile}")
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EOF
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CODE
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