ci: open PRs to update README

.github/workflows/update-readme.yml

@@ -1,14 +1,16 @@
 name: Check README parser info
 
-on: push
+on:
+  push:
+    branches:
+      - master
 
 jobs:
   update-readme:
     name: Check README parser info
     runs-on: ubuntu-latest
-    if: github.ref != 'master'
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
 
       - name: Prepare
         env:
@@ -21,18 +23,19 @@ jobs:
           mkdir -p ~/.local/share/nvim/site/pack/nvim-treesitter/start
           ln -s $(pwd) ~/.local/share/nvim/site/pack/nvim-treesitter/start
 
-      # inspired by nvim-lspconfigs
       - name: Check README
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          COMMIT_MSG: |
-            [docgen] Update README.md
-            skip-checks: true
         run: |
           git config user.email "actions@github"
           git config user.name "Github Actions"
-          git remote set-url origin https://x-access-token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git
           ./nvim.appimage --headless -c "luafile ./scripts/update-readme.lua" -c "q" || echo "Needs update"
           git add README.md
-          # Only commit and push if we have changes
-          git diff --quiet && git diff --staged --quiet || (git commit -m "${COMMIT_MSG}"; git push origin HEAD:${GITHUB_REF})
+          git commit -m "Update README" || echo 'No commit necessary!'
+          git clean -xf
+
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v3
+        with:
+          commit-message: Update README
+          title: Update README
+          branch: update-readme-pr
+          base: ${{ github.head_ref }}