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fix(dev-infra): detect GitHub Actions installs

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Tianyi Cui
2026-07-27 22:00:36 +08:00
parent 1f8a3dd7b1
commit 74c1a76440
8 changed files with 32 additions and 26 deletions
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.agents/notes/implemented/process/2026-07-27-worktree-local-lefthook.md
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@@ -12,7 +12,7 @@ Lefthook-generated hooks prefer an absolute binary path captured from the instal
## Decision
Hook installation is worktree-scoped. With `CI=true`, the installer returns before Git discovery or mutation because automated jobs do not consume contributor hooks. Otherwise, it requires Git 2.26 or newer for configuration-scope provenance, upgrades a format-0 repository to format 1, enables `extensions.worktreeConfig`, and assigns the current worktree an absolute `core.hooksPath` at `$GIT_DIR/dsh-hooks`. Before first enabling the repository-wide extension, it inspects the dormant `config.worktree` file for the main worktree and every registered linked worktree, then refuses any settings whose activation would change the current or a sibling worktree. The main worktree receives `$GIT_COMMON_DIR/dsh-hooks`; each linked worktree receives the corresponding directory under `$GIT_COMMON_DIR/worktrees/<id>`. A repository-scoped lock serializes configuration migration and hook writes, including repeated concurrent installs. Each lock records a process ID and random ownership token; release verifies the same file identity and exact record. A dead or invalid lock is never broken automatically, so the diagnostic requires the contributor to confirm no installer is running and remove the lock manually.
Hook installation is worktree-scoped. With `CI=true` or `GITHUB_ACTIONS=true`, the installer returns before Git discovery or mutation because automated jobs do not consume contributor hooks. Otherwise, it requires Git 2.26 or newer for configuration-scope provenance, upgrades a format-0 repository to format 1, enables `extensions.worktreeConfig`, and assigns the current worktree an absolute `core.hooksPath` at `$GIT_DIR/dsh-hooks`. Before first enabling the repository-wide extension, it inspects the dormant `config.worktree` file for the main worktree and every registered linked worktree, then refuses any settings whose activation would change the current or a sibling worktree. The main worktree receives `$GIT_COMMON_DIR/dsh-hooks`; each linked worktree receives the corresponding directory under `$GIT_COMMON_DIR/worktrees/<id>`. A repository-scoped lock serializes configuration migration and hook writes, including repeated concurrent installs. Each lock records a process ID and random ownership token; release verifies the same file identity and exact record. A dead or invalid lock is never broken automatically, so the diagnostic requires the contributor to confirm no installer is running and remove the lock manually.
The installer recognizes its hook directory with a private ownership marker and updates it idempotently. It inspects the effective scope, origin, and value of `core.hooksPath`, then refuses an unowned directory, every command-scoped path, and every non-owned worktree-scoped path, including values loaded through `config.worktree` includes. It follows conditional includes with Git's parser and refuses a command- or worktree-scoped include whose target provides, or cannot safely be shown not to provide, a hook path; an inactive condition therefore cannot later hide a user-owned path behind the installer's direct value. The same risk in an inherited system, global, or common-repository include requires `DSH_LEFTHOOK_ALLOW_HOOKS_PATH_OVERRIDE=1`, which explicitly opts only the current worktree into Lefthook while other worktrees retain the inherited path. Unrelated conditional includes remain valid. Command-scoped Git configuration is removed from the Lefthook subprocess environment after validation. This opt-in does not attempt to chain arbitrary hook managers.