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name: Line endings

# .gitattributes (*.md text eol=lf, * text=auto) normalizes local adds and checkouts,

# but CRLF blobs from server-side squash merges look modified and break peter-evans/create-pull-request.

on:

workflow_dispatch:

merge_group:

pull_request:

permissions:

contents: read

# Cancel older runs for the same ref to save runner time.

concurrency:

group: '${{ github.workflow }} @ ${{ github.event.pull_request.head.label || github.head_ref || github.ref }}'

cancel-in-progress: true

jobs:

line-endings:

if: github.repository == 'github/docs-internal' || github.repository == 'github/docs'

runs-on: ubuntu-latest

steps:

- name: Check out repo

uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0

- name: Check line endings

# Re-stage through .gitattributes so git can detect blobs that check out differently.

run: |

git add --renormalize .

if ! git diff --cached --quiet; then

echo "::error::These files violate .gitattributes line-ending rules (usually CRLF that should be LF):"

git diff --cached --name-only

echo ""

echo "Fix locally with: git add --renormalize . && git commit"

exit 1