feat: self update if there have been changes to the grammar but it was not built locally

.github/workflows/pulls.yml

@@ -0,0 +1,89 @@
+name: Test All Grammar
+
+on:
+  pull_request:
+    branches:
+      - "main"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    outputs:
+      self_mutation_happened: ${{ steps.self_mutation.outputs.self_mutation_happened }}
+    steps:
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+      - uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # v4.0.2
+        with:
+          node-version-file: '.nvmrc'
+      - name: Set up Go
+        uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
+        with:
+          go-version-file: "go.mod"
+      - name: Install dependencies
+        run: npm ci
+      - name: build
+        run: npm run build
+      - name: Find mutations
+        id: self_mutation
+        run: |-
+          git add .
+          git diff --staged --patch --exit-code > .repo.patch || echo "self_mutation_happened=true" >> $GITHUB_OUTPUT
+      - name: Upload patch
+        if: steps.self_mutation.outputs.self_mutation_happened
+        uses: actions/upload-artifact@26f96dfa697d77e81fd5907df203aa23a56210a8 # v4.3.1
+        with:
+          name: .repo.patch
+          path: .repo.patch
+          overwrite: true
+      - name: Fail build on mutation
+        if: steps.self_mutation.outputs.self_mutation_happened
+        run: |-
+          echo "::error::Files were changed during build (see build log). If this was triggered from a fork, you will need to update your branch."
+          cat .repo.patch
+          exit 1
+  self-mutation:
+    needs: build
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    if: always() && needs.build.outputs.self_mutation_happened && !(github.event.pull_request.head.repo.full_name != github.repository)
+    steps:
+      - name: Checkout
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+        with:
+          token: ${{ secrets.BOT_PUSH_GITHUB_TOKEN }}
+          ref: ${{ github.event.pull_request.head.ref }}
+          repository: ${{ github.event.pull_request.head.repo.full_name }}
+      - name: Download patch
+        uses: actions/download-artifact@6b208ae046db98c579e8a3aa621ab581ff575935 # v4.1.2
+        with:
+          name: .repo.patch
+          path: ${{ runner.temp }}
+      - name: Apply patch
+        run: '[ -s ${{ runner.temp }}/.repo.patch ] && git apply ${{ runner.temp }}/.repo.patch || echo "Empty patch. Skipping."'
+      - name: Set git identity
+        run: |-
+          git config user.name "tf-editor-exp-ci-bot"
+          git config user.email "svc-github-team-tf-editor-experience@hashicorp.com"
+      - name: Push changes
+        env:
+          PULL_REQUEST_REF: ${{ github.event.pull_request.head.ref }}
+        run: |-
+          git add .
+          git commit -s -m "chore: self mutation"
+          git push origin HEAD:$PULL_REQUEST_REF
+
+  test:
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+    - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+    - uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # v4.0.2
+      with:
+        node-version-file: '.nvmrc'
+    - name: Install modules
+      run: npm ci
+    - name: Run vscode-tmgrammar-test
+      run: npm test

.github/workflows/test.yml

@@ -4,9 +4,6 @@ on:
   push:
     branches:
       - "main"
-  pull_request:
-    branches:
-      - "main"
 
 jobs:
   copywrite: