Pages: auto-deploy on docs changes using latest release assets

Author: OyczE

.github/workflows/pages-webflasher.yml

@@ -5,12 +5,20 @@ on:
     inputs:
       release_tag:
         description: "Release tag to publish to GitHub Pages (example: v1.3.4)"
-        required: true
+        required: false
+  push:
+    branches: [main]
+    paths:
+      - "docs/**"
+      - ".github/workflows/pages-webflasher.yml"
 
 jobs:
   pages:
     name: Deploy Web Flasher (Pages)
     runs-on: ubuntu-24.04
+    concurrency:
+      group: github-pages
+      cancel-in-progress: true
     permissions:
       contents: read
       pages: write
@@ -27,10 +35,28 @@ jobs:
         with:
           enablement: true
 
+      - name: Resolve release tag
+        id: meta
+        env:
+          INPUT_TAG: ${{ inputs.release_tag }}
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          set -euo pipefail
+          TAG="${INPUT_TAG:-}"
+          if [ -z "$TAG" ]; then
+            TAG="$(gh api "repos/${GITHUB_REPOSITORY}/releases/latest" --jq .tag_name)"
+          fi
+          if [ -z "$TAG" ] || [ "$TAG" = "null" ]; then
+            echo "Could not resolve a release tag. Provide release_tag input or publish a Release." >&2
+            exit 1
+          fi
+          echo "tag=$TAG" >> "$GITHUB_OUTPUT"
+          echo "Using tag: $TAG"
+
       - name: Download release assets
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          TAG: ${{ inputs.release_tag }}
+          TAG: ${{ steps.meta.outputs.tag }}
         run: |
           set -euo pipefail
           rm -rf docs/firmware
@@ -59,7 +85,7 @@ jobs:
 
       - name: Build manifest.json
         env:
-          TAG: ${{ inputs.release_tag }}
+          TAG: ${{ steps.meta.outputs.tag }}
         run: |
           set -euo pipefail
           python -c "import os, json; from pathlib import Path; tag=os.getenv('TAG','manual'); manifest={'name':'projectZero ESP32-C5','version':tag,'build':tag,'chipFamily':'ESP32-C5','parts':[{'path':'firmware/bootloader.bin','offset':8192},{'path':'firmware/partition-table.bin','offset':32768},{'path':'firmware/projectZero.bin','offset':131072}]}; Path('docs/manifest.json').write_text(json.dumps(manifest, indent=2) + '\\n')"
@@ -72,4 +98,3 @@ jobs:
       - name: Deploy to GitHub Pages
         id: deployment
         uses: actions/deploy-pages@v4
-