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feat(install): lock destinations during sync

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Create <destination>/.ai-config.lock exclusively while syncing so parallel
installs or updates fail instead of interleaving writes. A lock left by an
exited process of the same shell on the same host is replaced.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Julian lechnerandClaude Opus 5.5 committed 2026-10-01 12:45:39 +02:00
1 parent d4143ae2ac
commit 96313f4056
4 files changed
+97 -1
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scripts/tests/test-managed-install.sh
+11
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@@ -135,5 +135,16 @@ sync_managed_destination "${targets[0]%%|*}" "${targets[0]#*|}" skill-remove ""
printf '__CLAUDE_CODE_MAX_TOOL_USE_CONCURRENCY__' > "$source_dir/concurrency.txt"
sync_managed_destination "$source_dir" "$destination" concurrency "" "" "" false false true 7 > /dev/null
[ "$(cat "$destination/concurrency.txt")" = 7 ] || { printf 'Standalone concurrency placeholder must be resolved.\n' >&2; exit 1; }
[ -z "$(find "$destination" -name '.ai-config-write.*' -print -quit)" ] || { printf 'Atomic writes left a temporary file.\n' >&2; exit 1; }
[ ! -e "$destination/.ai-config.lock" ] || { printf 'Sync must release its destination lock.\n' >&2; exit 1; }
printf 'powershell other-host 1\n' > "$destination/.ai-config.lock"
manifest_before=$(cat "$destination/.ai-config-manifest.tsv")
if sync_managed_destination "$source_dir" "$destination" locked "" "" "" false > /dev/null 2>&1; then printf 'A held destination lock must block a parallel sync.\n' >&2; exit 1; fi
[ "$(cat "$destination/.ai-config-manifest.tsv")" = "$manifest_before" ] || { printf 'A blocked sync must not write the manifest.\n' >&2; exit 1; }
bash -c 'exit 0' & exited_pid=$!
wait "$exited_pid"
printf 'bash %s %s\n' "$(uname -n)" "$exited_pid" > "$destination/.ai-config.lock"
sync_managed_destination "$source_dir" "$destination" stale-lock "" "" "" false > /dev/null
[ ! -e "$destination/.ai-config.lock" ] || { printf 'A stale lock from an exited process must be replaced and released.\n' >&2; exit 1; }
if [ "$summary" = true ]; then printf 'Tests: PASS | managed install\n'; else printf 'PASS managed manifest: idempotent, stale removal, modified-file protection, foreign files preserved, dry run side-effect free, skill migration\n'; fi