Fix/continuous delivery

.github/workflows/continuous-delivery.yml

@@ -7,6 +7,11 @@ on:
         description: Merge staging into master first? (y/N)
         required: false
         default: 'n'
+      ignore_metadata_diff:
+        type: boolean
+        description: Perform all jobs, regardless of whether there are actual changes?
+        required: false
+        default: false
 
 concurrency:
   group: cd-${{ github.ref_name }}
@@ -79,11 +84,11 @@ jobs:
           fi
 
       - name: Checkout code
-        if: fromJSON(needs.metadata.outputs.has_diff)
+        if: fromJSON(needs.metadata.outputs.has_diff) || github.event.inputs.ignore_metadata_diff
         uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab # v3.5.2
 
       - name: Run merge
-        if: fromJSON(needs.metadata.outputs.has_diff)
+        if: fromJSON(needs.metadata.outputs.has_diff) || github.event.inputs.ignore_metadata_diff
         uses: devmasx/merge-branch@854d3ac71ed1e9deb668e0074781b81fdd6e771f # tag=v1.4.0
         with:
           type: now
@@ -93,23 +98,23 @@ jobs:
 
       - name: Get merge commit SHA
         id: get_sha
-        if: fromJSON(needs.metadata.outputs.has_diff)
+        if: fromJSON(needs.metadata.outputs.has_diff) || github.event.inputs.ignore_metadata_diff
         run: |
           git fetch origin master
           echo 'sha='"$(git rev-parse origin/master)" >> "$GITHUB_OUTPUT"
 
   continuous_integration:
     name: Continuous Integration
     needs: [metadata, merge]
-    if: fromJSON(needs.metadata.outputs.has_diff)
+    if: fromJSON(needs.metadata.outputs.has_diff) || github.event.inputs.ignore_metadata_diff
     uses: csvalpha/amber-ui/.github/workflows/continuous-integration.yml@staging
     with:
       sha: ${{ needs.merge.outputs.sha }}
 
   publish_image:
     name: Publish Image
     needs: [metadata, merge]
-    if: fromJSON(needs.metadata.outputs.has_diff)
+    if: fromJSON(needs.metadata.outputs.has_diff) || github.event.inputs.ignore_metadata_diff
     uses: csvalpha/amber-ui/.github/workflows/publish-image.yml@staging
     with:
       sha: ${{ needs.merge.outputs.sha }}
@@ -122,8 +127,8 @@ jobs:
     needs: [metadata, merge, continuous_integration, publish_image]
     if: |
       (github.ref_name == 'staging' || github.ref_name == 'master') && ((github.ref_name == 'master' &&
-      github.event.inputs.merge == 'y' && fromJSON(needs.metadata.outputs.has_diff) && success()) ||
-      ((github.event.inputs.merge != 'y' || !fromJSON(needs.metadata.outputs.has_diff)) && !cancelled()))
+      github.event.inputs.merge == 'y' && (fromJSON(needs.metadata.outputs.has_diff) || github.event.inputs.ignore_metadata_diff) && success()) ||
+      ((github.event.inputs.merge != 'y' || !(fromJSON(needs.metadata.outputs.has_diff) || github.event.inputs.ignore_metadata_diff)) && !cancelled()))
     steps:
       - name: Get environment URL
         id: get_url

README.md

@@ -63,6 +63,8 @@ Deployments are done using GitHub Actions. To deploy a branch, follow the follow
 - Choose a branch and if you want to merge the changes on the staging branch into the master branch (only possible when the branch chosen in previous step is master).
 - Click the green button "Run workflow".
 
+*Note: If the workflow fails with an error message about blobs along the lines of the following: `buildx failed with: ERROR: failed to solve: [...] blob [...]`: remove all recent cache files for staging on the [Caches page](https://github.com/csvalpha/amber-ui/actions/caches) and try again. You might have to turn on the option `Perform all jobs, regardless of whether there are actual changes?` to force the workflow to re-execute all its jobs.*
+
 ## Further Reading / Useful Links
 
 - [ember.js](https://emberjs.com/)