mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 18:30:30 +01:00
Chandler Carruth
652e0ce7d0
It had a few subtle GNU extensions in it that didn't work on macOS. There are simple portable alternatives so it was easy to adapt. Assisted-by: Antigravity with Gemini
113 lines
3.6 KiB
Bash
Executable File
113 lines
3.6 KiB
Bash
Executable File
#!/usr/bin/env bash
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#
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# Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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# Exceptions. See /LICENSE for license information.
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# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#
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# Runs prek over the commits `jj git push` would send, and pushes only if they
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# pass. Takes the same arguments as `jj git push`.
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set -eu
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JJ_PREK="$(dirname "${BASH_SOURCE[0]}")/jj_prek.sh"
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# Succeeds if the working-copy commit is in the given revset. This snapshots the
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# working copy, so it sees anything the hooks rewrote.
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working_copy_is() {
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[[ -n "$(jj log --no-graph -r "@ & ($1)" --template 'commit_id')" ]]
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}
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# Succeeds if the working copy is an empty, undescribed child of the target,
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# which hooks can run in and write their fixes into.
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working_copy_sits_on() {
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working_copy_is "empty() & description(exact:\"\") & children($1)"
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}
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# Returns the working copy to where it started. jj discards an empty,
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# undescribed commit when the working copy moves off it, so the original may be
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# gone. Build a new one on the same parents in that case.
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restore_working_copy() {
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if [[ -n "$(jj log --no-graph --ignore-working-copy \
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-r "present($ORIG_CHANGE)" --template 'commit_id')" ]]; then
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jj edit --quiet "$ORIG_CHANGE"
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else
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jj new --quiet $ORIG_PARENTS
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fi
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}
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# `--help` describes `jj git push`, and has nothing to check.
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for arg in "$@"; do
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case "$arg" in
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-h | --help)
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exec jj git push "$@"
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;;
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esac
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done
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# Ask jj what the push would do. This checks the arguments and lists the commits
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# being sent, without contacting the remote. A `--dry-run` already in `$@` is
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# harmless here, and still suppresses the push at the end.
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if ! PLAN="$(jj git push --dry-run "$@" 2>&1)"; then
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echo "$PLAN" >&2
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exit 1
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fi
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REMOTE="$(sed -n 's/^Changes to push to \(.*\):$/\1/p' <<<"$PLAN")"
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# Each updated bookmark or tag reports the commit it moves to. Deletions have no
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# such commit, and send nothing to check.
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TARGETS="$(sed -E -n 's/^ (bookmark|tag): .* to ([0-9a-f]{8,})\]$/\2/p' <<<"$PLAN" |
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paste -sd '|' -)"
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# Nothing to check, so just push.
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if [[ -z "$REMOTE" || -z "$TARGETS" ]]; then
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exec jj git push "$@"
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fi
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# Only the heads need checking; a head's range covers everything below it.
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HEADS="$(jj log --no-graph --ignore-working-copy -r "heads($TARGETS)" \
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--template 'commit_id ++ "\n"')"
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ORIG_CHANGE="$(jj log --no-graph -r @ --template 'change_id')"
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ORIG_PARENTS="$(jj log --no-graph -r 'parents(@)' --template 'commit_id ++ " "')"
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for target in $HEADS; do
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# Check with the working copy on top of the target.
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made_scratch=0
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if ! working_copy_sits_on "$target"; then
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jj new --quiet "$target"
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made_scratch=1
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fi
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# Check from the newest ancestor already on the remote. When there is none,
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# there is no range to diff, so check every file.
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base="$(jj log --no-graph --ignore-working-copy \
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-r "heads(::$target & ::remote_bookmarks(remote=exact:$REMOTE))" \
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--template 'commit_id ++ "\n"' | head -n 1)"
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if [[ -n "$base" ]]; then
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check=(--from-ref "$base" --to-ref "$target")
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else
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check=(--all-files)
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fi
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result=0
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"$JJ_PREK" "${check[@]}" || result=$?
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# Discard the scratch commit unless the hooks wrote something into it.
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if ((made_scratch)) && working_copy_is 'empty()'; then
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restore_working_copy
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fi
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if ((result)); then
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echo >&2
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if ! working_copy_is 'empty()'; then
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change="$(jj log --no-graph -r @ --template 'change_id.shortest()')"
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echo "Hooks changed files. They are in $change." >&2
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fi
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echo "Error: checks failed, nothing pushed." >&2
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exit 1
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fi
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done
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exec jj git push "$@"
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