FR: `.swiftformatignore`, etc to ignore `Pods/` and other folders when recursively formatting

[jasikpark]

TLDR:

• allow only disabling linting and only enabling formatting
• allow ignoring specific folders and files when running recursively

---

I want to set up formatting and linting for my Flutter project that uses Cocoapods for dependency management on the Swift/Xcode side of things.

Flutter formatting is simple:

name: Flutter format
on:
  push:
    branches:
      - main
  pull_request:
    paths:
      - '.github/workflows/flutterfmt.yml'
      - '.github/workflows/flutterfmt.sh'
      - '**.dart'
jobs:
  flutterfmt:
    name: Run flutter format
    runs-on: ubuntu-latest
    steps:
      - name: Install flutter
        uses: subosito/flutter-action@v2
        with:
          flutter-version: '3.29.0'

      - name: Check out code
        uses: actions/checkout@v4
        with:
          show-progress: false

      - name: Check formating
        run: dart format -l120 lib/ --set-exit-if-changed --suppress-analytics --output none

I tried to add a swift-format check similarly going off of https://calebhearth.com/swift-format-github-action:

name: Swift format
on:
  push:
    branches:
      - main
  pull_request:
    paths:
      - '.github/workflows/swiftfmt.yml'
      - '**.swift'
jobs:
  swiftfmt:
    name: Run swift format
    runs-on: macos-latest
    steps:
      - name: Check out code
        uses: actions/checkout@v4
        with:
          show-progress: false

      - name: Check formating
        run: |
            xcrun swift-format lint . \
            --parallel \
            --recursive \
            --strict

This mostly works, but I had to run xcrun swift-format dump-configuration and then disable offending rules while I consider enabling them / work to enable them. I was able to ignore everything except for these last lints:

ios/Pods/Sentry/Sources/Swift/Integrations/SessionReplay/SentrySessionReplay.swift:192:100: warning: [EndOfLineComment] move end-of-line comment that exceeds the line length

I don't have control over my Cocoapods vendored code, and I would like to ignore those files accordingly.

[ahoppen]

Synced to Apple’s issue tracker as rdar://144825272

[allevato]

An initial version of this was started in #873, but it looks like it's stalled.

[ahoppen]

Let’s close this as a duplicate of #870