UI Checkstyle / ESLint + Prettier + organize-imports

The UI Checkstyle GitHub workflow (.github/workflows/ui-checkstyle.yml) runs
a single checkstyle job (after check-changes + authorize gates) whose
steps gate six checks, each on only the files the PR changed:

1. ESLint + Prettier + organize-imports on src
   (openmetadata-ui/src/main/resources/ui/src/...)
2. Licence header check
3. i18n sync (yarn i18n produces no diff)
4. app-docs (yarn generate:app-docs produces no diff)
5. ESLint + Prettier + organize-imports on playwright (.../ui/playwright/...)
6. ESLint + Prettier on core-components
   (openmetadata-ui-core-components/src/main/resources/ui/src/...)

Any failing step fails the required ui-checkstyle status check. Each lint
step reformats the changed files and fails if the reformat produces a diff — i.e.
the committed tree must already be formatted. This skill runs the same sequence
locally so CI never has to ask.

Note: there is one checkstyle job with the steps above, not three
separate lint-src/lint-playwright/lint-core-components jobs — those names
are the internal step ids, and the workflow also gates licence/i18n/app-docs.

When to activate

• The user asks to "fix UI checkstyle", "fix UI lint", "run prettier", "run
  eslint", "fix the UI format", "apply UI format", or similar.
• CI reports a UI Checkstyle failure (the summary comment lists the failing
  check and the modified files).
• After you have finished authoring or editing any .ts/.tsx/.js/.jsx/
  .json under the three UI trees — before opening a PR or pushing a commit that
  touches UI.

Arguments

• --src (default for files under openmetadata-ui/.../ui/src/)
• --playwright (files under .../ui/playwright/)
• --core-components (files under openmetadata-ui-core-components/...)
• --all — run all three areas
• --check — verify only: run the sequence in a dry-run pass and report which
  files are still dirty, without writing. Useful before push.

If invoked with no flag, auto-detect the affected areas from
git diff --name-only origin/main...HEAD and run only those.

Process

Step 1: Compute the file list

For each area you are running against:

# from the repo root
git diff --name-only origin/main...HEAD -- \
  'openmetadata-ui/src/main/resources/ui/src/**/*.{ts,tsx,js,jsx,json}' \
  | sed 's|openmetadata-ui/src/main/resources/ui/||' > /tmp/src_files.txt

git diff --name-only origin/main...HEAD -- \
  'openmetadata-ui/src/main/resources/ui/playwright/**/*.{ts,tsx,js,jsx}' \
  | sed 's|openmetadata-ui/src/main/resources/ui/||' > /tmp/pw_files.txt

git diff --name-only origin/main...HEAD -- \
  'openmetadata-ui-core-components/**/*.{ts,tsx,js,jsx,json}' \
  | sed 's|openmetadata-ui-core-components/src/main/resources/ui/||' \
  > /tmp/core_files.txt

Skip any list that is empty — that area has no changes so the CI check for it
wouldn't run anyway.

Step 2: Run the CI sequence

From the corresponding working directory:

cd openmetadata-ui/src/main/resources/ui   # or .../openmetadata-ui-core-components/src/main/resources/ui

# 1) imports first — organize-imports-cli only exists for the ui module
cat /tmp/src_files.txt | xargs ./node_modules/.bin/organize-imports-cli

# 2) eslint --fix (same flags CI uses)
NODE_OPTIONS='--max-old-space-size=8192' cat /tmp/src_files.txt \
  | xargs ./node_modules/.bin/eslint --no-error-on-unmatched-pattern --fix

# 3) prettier --write — this MUST run after organize-imports because
#    organize-imports uses 4-space indentation / drops trailing commas,
#    and prettier then puts them back to the repo's 2-space + trailing-comma
#    style. Running them in the other order leaves a dirty diff.
cat /tmp/src_files.txt \
  | xargs ./node_modules/.bin/prettier \
      --config './.prettierrc.yaml' --ignore-path './.prettierignore' \
      --write

For playwright, use the same three commands on /tmp/pw_files.txt.
For core-components, the organize-imports step is skipped (no CLI there) —
just eslint + prettier.

Step 3: Report what changed

cd <repo root>
git status --short   # should list only .ts/.tsx/.js/.jsx/.json files
git diff --stat

If git status --short is empty, the tree is already clean — tell the user and
stop.

Step 4: Commit

Do not fold the reformat into an unrelated commit. If the user asked you to
commit, follow their preference (fold into the in-progress commit, or make a
separate one). Otherwise, when you are confident the change is a purely
mechanical formatting reformat, you may commit it on its own as a
Fix UI checkstyle commit — this matches the repo's existing history for
bot-triggered formatting-only commits. If you are unsure whether the diff is
purely mechanical, do NOT auto-commit: surface the changed-file list and let the
user decide.

Notes

• The --check mode mirrors CI's behavior: run the commands and then verify
  git status --short is empty. Revert any writes before exiting so the user's
  working tree isn't touched.
• If ESLint reports hard errors (not warnings, not auto-fixable), stop and
  surface them — they need a real code change, not a format pass. Warnings
  (e.g. playwright/no-wait-for-selector) don't fail CI and can be left.
• The analogous Java command is mvn spotless:apply — see the java-checkstyle
  skill.
• TypeScript type-check errors (tsc) are a separate concern and are not fixed
  by this skill — the tsc:check / tsc:playwright scripts run in different jobs.

Out of scope

• TypeScript type-check errors (tsc) — different jobs, different failure modes,
  not auto-fixable by this skill.
• Java formatting — use the java-checkstyle skill (mvn spotless:apply).
• Python formatting — use make py_format (ruff lint-fix + format; see
  ingestion/Makefile). (Note: this is ruff, not black/isort/pycln.)