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Avoid repeated CLI startup when preparing integration fixtures - #917

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sds merged 1 commit into
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perf/fixture-install-api
Nov 5, 2026
Merged

sds merged 1 commit into
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perf/fixture-install-api

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@sds sds commented Nov 5, 2026 •

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Prepare installed hooks through Overcommit::Installer when installation is only integration-test setup. This avoids repeatedly starting Ruby and loading the CLI before exercising a commit, push, signing, merge, or concurrency behavior. Dedicated CLI/installation and Gemfile-loading tests retain their real executable calls; every example and assertion remains.

The helper clears repository-path caches before and after installation so setup cannot inherit a previous example's repository or leak its own paths. Fixture logging is captured in memory.

Paired Windows CI experiment on Ruby 3.4 compared unchanged code and this setup on the same VM, alternating order across all five production shards:

Shard Control Installer API
1 30.70s 27.49s
2 41.13s 38.91s
3 49.90s 43.21s
4 47.62s 45.84s
5 35.08s 29.11s

All five candidates passed and were faster in both execution orders: median paired reduction 10.5%, aggregate test-command reduction 9.7%.

Local validation: all 90 integration examples pass, RuboCop passes, and git diff --check passes. Full GitHub CI passed all 10,188 example executions across the six Ruby/OS pairs, lint, and required CI in 107s. This verifies correctness; overall workflow time was approximately unchanged within hosted-runner variation.

@sds
sds merged commit afa4e63 into main Nov 5, 2026
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@sds
sds deleted the perf/fixture-install-api branch November 5, 2026 18:59
sds added a commit to guillaume-d/overcommit that referenced this pull request Nov 10, 2026
* origin/main: (108 commits)
  Remember all previously approved configurations and hooks (sds#665)
  Keep deleted and renamed paths absent while stashing changes (sds#928)
  Document the case-sensitive KtLint hook name (sds#927)
  Update CI actions and pin Ubuntu to clear annotations (sds#926)
  Preserve standard input bytes when forwarding hooks (sds#925)
  Preserve Git-quoted filenames when running all hooks (sds#924)
  Fail when Git cannot enumerate tracked files (sds#923)
  Add note about disabling default hooks (sds#922)
  Close files inspected by LineEndings (sds#921)
  Use Script Host before PowerShell for Windows parent query fallback (sds#920)
  Cache Windows dependency resolution with daily refreshes (sds#919)
  Avoid PowerShell startup for Windows parent command queries (sds#918)
  Avoid repeated CLI startup when preparing integration fixtures (sds#917)
  Allocate more CI runners to Windows with asymmetric sharding (sds#916)
  Shard CI tests across runners and add one required CI check (sds#915)
  Remove EOL Ruby versions from the CI matrix (sds#914)
  Cut CI test time by 68% while preserving the full test matrix (sds#913)
  Cut version 0.75.0 (sds#912)
  Re-enable the full Windows test matrix and fix platform failures (sds#911)
  Read .overcommit.yml as UTF-8 in the hook template (sds#910)
  Update Overcommit logo (sds#907)
  Cut version 0.74.0 (sds#906)
  Keep each worktree's signatures separate (sds#903)
  Recognize amend aliases on macOS (sds#904)
  Exclude files deleted from the working tree from all_files (sds#905)
  Restore the Ruby 2.6-3.1 test checks (sds#902)
  Delete subprocess output tempfiles once they are read (sds#901)
  Stop wrapping commands in cmd.exe on Windows (sds#898)
  Allow URL-only lines to exceed TextWidth body limit (sds#900)
  Cut version 0.73.0 (sds#896)
  Add automated release flow (sds#895)
  Instruct oxfmt not to fail if no files are matched (sds#894)
  Add filetypes to oxc tools (sds#893)
  Add pre commit hook for herb-lint (sds#892)
  Cut version 0.72.0 (sds#891)
  Remove maintainability badge (sds#890)
  Require patched REXML version (sds#889)
  Fix operation state restoration in linked worktrees (sds#887)
  Fail Flay hook when flay crashes instead of silently passing (sds#885)
  Fix Solargraph regexp capture warning (sds#886)
  Cut version 0.71.0 (sds#883)
  Prepare for the new solargraph typecheck format (sds#873)
  Make hook context input reads thread-safe (sds#882)
  Cut version 0.70.0 (sds#880)
  Add oxc pre-commit hooks (sds#879)
  Add Ruby 3.4 and 4.0 to CI matrix (sds#878)
  Cut version 0.69.0 (sds#877)
  Use Etc.nprocessors and handle sandboxed environments (sds#876)
  Cut version 0.68.0 (sds#872)
  Add solargraph pre-commit hook for typechecking (sds#871)
  Update RuboCop in Gemfile to silence a deprecation warning in build (sds#870)
  Cut version 0.67.1
  adds 'set' requirements to diff hook context. (sds#866)
  Add note about unsupported YAML features in `gemfile:` line in default.yml (sds#865)
  Cut version 0.67.0 (sds#864)
  Restore ability to specify "gemfile: false" in config (sds#863)
  Cut version 0.66.0 (sds#861)
  Add `-diff` cli option for running precommit hooks against diffs (sds#860)
  Cut version 0.65.0
  Load bundled gems on expected version (sds#859)
  Update changelog
  Bump rexml to >= 3.3.9 to resolve GHSA-2rxp-v6pw-ch6m (sds#857)
  Expand tildes(~) for hooksPath (sds#853)
  Fix spec compatibility with recent git versions (sds#854)
  Update changelog
  Cut version 0.64.0 (sds#852)
  Add changelog_uri to gemspec (sds#851)
  Support stylelint 16+, which emits messages on stderr (sds#848)
  Add Ruby 3.3 to CI matrix (sds#849)
  Update README with latest requirements (sds#845)
  Fix README badges (sds#844)
  Cut version 0.63.0 (sds#843)
  Add RSpec Hook to PreCommit, Add Applicable files if set (sds#842)
  Fix RuboCop warnings (sds#841)
  [FEATURE] New pre-commit hook: Sorbet (Issue sds#825) (sds#826)
  Green CI PoC (sds#833)
  Revert "Get suite running smoothly again (sds#824)" (sds#840)
  Get suite running smoothly again (sds#824)
  Cut version 0.62.0 (sds#821)
  Allow childprocess 5 (sds#820)
  Update branch for CI from `master` to `main` (sds#819)
  Update RuboCop (sds#818)
  Adding Ruby 3.2 to test matrix (sds#816)
  Cut version 0.61.0 (sds#817)
  fix: local overcommit file merges with existing .overcommit.yml file (sds#815)
  Allow ReplaceBranch to use skip_if (sds#809)
  Cut version 0.60.0 (sds#807)
  Add non ASCII encoding schema support to RailsSchemaUpToDate hook (sds#786)
  Rescue Psych::DisallowedClass in YamlSyntax (sds#805)
  Add optional additional local configuration (sds#799)
  Add MixTest hook (sds#802)
  Add MixFormat hook (sds#801)
  support trailing space in replace_branch's 'replacement_text' config (sds#804)
  Allow overriding Gemfile.lock (sds#796)
  Cut version 0.59.1 (sds#785)
  Revert addition of `--disable-pending-cops` flag to RuboCop (sds#783)
  Revert `Fix encoding of process output under windows` (sds#784)
  Cut version 0.59.0 (sds#780)
  Partial log flushing to make long hooks intuitive (sds#777)
  Fix pronto hooks swallowing generic errors (sds#779)
  ...

# Conflicts:
#	CHANGELOG.md
#	README.md
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