Allow same-version binding regeneration

.github/workflows/update_bindings_and_push_to_vulkan.yml

@@ -9,6 +9,11 @@ on:
         description: "Optional Vulkan-Docs tag (for example v1.4.362)"
         required: false
         type: string
+      force_regenerate:
+        description: "Regenerate the already-published registry tag after a generator fix"
+        required: false
+        default: false
+        type: boolean
 
 permissions:
   contents: read
@@ -26,11 +31,13 @@ jobs:
     outputs:
       requested: ${{ steps.versions.outputs.requested }}
       changed: ${{ steps.versions.outputs.changed }}
+      branch: ${{ steps.versions.outputs.branch }}
     steps:
       - uses: actions/checkout@v7
       - id: versions
         env:
           REQUESTED_VERSION: ${{ inputs.vk_docs_version }}
+          FORCE_REGENERATE: ${{ inputs.force_regenerate }}
           TARGET_VERSION_URL: https://raw.githubusercontent.com/antono2/vulkan/master/VERSION
         run: |
           set -euo pipefail
@@ -49,10 +56,18 @@ jobs:
             exit 1
           }
           changed=true
-          [[ "$current" == "$requested" ]] && changed=false
+          branch="generated/$requested"
+          if [[ "$current" == "$requested" ]]; then
+            changed=false
+            if [[ "$FORCE_REGENERATE" == true ]]; then
+              changed=true
+              branch="compat/generated-$requested"
+            fi
+          fi
           echo "requested=$requested" >> "$GITHUB_OUTPUT"
           echo "changed=$changed" >> "$GITHUB_OUTPUT"
-          echo "Current: $current; requested: $requested; update required: $changed"
+          echo "branch=$branch" >> "$GITHUB_OUTPUT"
+          echo "Current: $current; requested: $requested; update required: $changed; branch: $branch"
 
   generate:
     needs: versions
@@ -130,7 +145,7 @@ jobs:
           path: generated
       - name: Commit generated module to a release branch
         env:
-          BRANCH_NAME: generated/${{ needs.versions.outputs.requested }}
+          BRANCH_NAME: ${{ needs.versions.outputs.branch }}
         run: |
           set -euo pipefail
           test -f c/volk.c.v
@@ -157,7 +172,7 @@ jobs:
           fi
       - name: Open or update pull request
         env:
-          BRANCH_NAME: generated/${{ needs.versions.outputs.requested }}
+          BRANCH_NAME: ${{ needs.versions.outputs.branch }}
           GH_TOKEN: ${{ secrets.PUSH_VULKAN }}
           RELEASE_VERSION: ${{ needs.versions.outputs.requested }}
         run: |

README.md

@@ -78,6 +78,11 @@ validates them with V, and opens a generated pull request in
 creates the matching immutable version tag after the target repository's
 required checks pass.
 
+When the registry tag is already published but the generator itself needs a
+compatibility correction, run the workflow manually with `force_regenerate`.
+It opens a `compat/generated-<tag>` pull request without changing `VERSION` or
+using the release-only `generated/*` branch namespace.
+
 `publish-compatibility-tags.yml` is a manual maintenance workflow for old
 registry releases whose original generated layout is not accepted by current
 V. It publishes new `+vcompat.N` tags and never rewrites the historical tags.