valid-files.yml

name: CI

on:
  push:
  pull_request:

jobs:
  max-file-size:
    name: Check file sizes
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2
        with:
          ref: ${{ github.event.pull_request.head.sha }}

      - name: Fetch everything
        run: git fetch --prune --unshallow

      - name: Error if any file is above 1 MB
        run: |
          # --diff-filter=d excludes deleted (d) files
          # -z separates the files using NUL
          git diff --diff-filter=d --name-only -z origin/master... | while read -r -d '' FILE; do
            # Skip files that are allowed to have larger size
            if [ "$FILE" == "languages/languages.json" ] ||
               [ "$FILE" == "languages/README.md" ] ||
               [ "$FILE" == "reference/references.json" ] ||
               [ "$FILE" == "reference/README.md" ] ||
               [ "$FILE" == "reference/stories/stories.json" ] ||
               [ "$FILE" == "reference/stories/README.md" ] ||
               [ "$FILE" == "languages/python/reference/README.md" ]; then
                continue
            fi

            if [ "$(stat --printf="%s" "$FILE")" -gt 100000 ]; then
              echo "$FILE is larger than 10 KB"
              echo "Please ping @iHiD if you are sure that this file is required."
              exit 1
            fi
          done

  valid-filenames:
    name: Check file names
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2
        with:
          ref: ${{ github.event.pull_request.head.sha }}

      - name: Fetch everything
        run: git fetch --prune --unshallow

      - name: Error if filenames contain illegal characters or words
        run: |
          # --diff-filter=d excludes deleted (d) files
          # -z separates the files using NUL
          git diff --diff-filter=d --name-only -z origin/master... | while read -r -d '' LINE; do
            FILE=$(basename "$LINE")
            if ! [[ "$FILE" =~ ^[a-zA-Z0-9._-]+$ ]]; then
                echo "$FILE contains illegal characters."
                echo "Filenames in this repo may only include the characters [a-zA-Z0-9._-] for security reasons."
                echo "See https://github.com/exercism/v3/issues/1465#issuecomment-629873323 for more information."
                exit 1
            elif [[ "$FILE" =~ ^(AUX|NUL|PRN|CON|LPT[0-9]|COM[0-9])$ ]]; then
                echo "$FILE is not a valid filename on Windows."
                echo "See https://github.com/exercism/v3/issues/1369 for more information."
                exit 1
            fi
          done