Need to update file before creating version

.github/workflows/bumpversion.yml

@@ -1,29 +1,46 @@
-name: Bump version
+name: Update file on PR merge
 on:
-  push:
+  pull_request:
     branches:
       - main
+    types: closed
+
 jobs:
-  build:
+  update_date:
+    if: github.event.pull_request.merged == true
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - name: checkout
+        uses: actions/checkout@v3
+        with:
+          # Fetch full depth, otherwise the last step overwrites the last commit's parent, essentially removing the graph.
+          fetch-depth: 0
+
+      - name: GenerateTag
+        id: name_tag
+        uses: mathieudutour/[email protected]
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          create_annotated_tag: true
+          default_bump: patch
+          dry_run: true
+          tag_prefix: manic-
+      - name: Update version.txt
+        run: |
+          echo "${{ steps.name_tag.outputs.new_tag }}" > version.txt
+      - name: Amend the last commit
+        run: |
+          git config --global user.email "[email protected]"
+          git config --global user.name "OpenRCT2 git bot"
+          git commit -a --amend --no-edit
+          git push --force-with-lease
+          echo "Complete"name: Bump version
       - name: Bump version and push tag
-        id: tag_version
+        id: really_tag_version
         uses: mathieudutour/[email protected]
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           create_annotated_tag: true
           default_bump: patch
           dry_run: false
           tag_prefix: manic-
-  write-version:
-    runs-on: ubuntu-latest
-    name: Write Version to File
-    steps:
-    - uses: actions/checkout@master
-    - name: Update version
-      uses: brettdorrans/[email protected]
-      with:
-        filename: '/.version.txt'
-        placeholder: '${VERSION}'