ci: cherry-pickable docs workflow (#479)

.github/workflows/deploy-pages.yml

@@ -2,15 +2,12 @@ name: Deploy documentation
 on:
   push:
     branches:
-      - ci
       - main
-      - dev
-  workflow_dispatch:
+      - docs-snapshot
+  workflow_dispatch: {}
   release:
     types:
       - released
-      - unpublished
-      - edited
 
 permissions:
   contents: read
@@ -22,17 +19,36 @@ concurrency:
   cancel-in-progress: true
   
 jobs:
-  get_latest_release:
-    name: Get latest release
-    uses: bdunderscore/modular-avatar/.github/workflows/get-latest-release.yml@main
+  snapshot-docs:
+    name: Snapshot documentation
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        # Run on releases only
+        if: ${{ github.event.release }}
+        with:
+          ref: ${{ github.ref }}
+          fetch-depth: 0
+          fetch-tags: true
+      - name: Merge with existing branch
+        # Run on releases only
+        if: ${{ github.event.release }}
+        run: |
+          git config --global user.name "GitHub Actions"
+          git config --global user.email "github-actions@nadena.dev"
+          git merge -s ours origin/docs-snapshot
+          git push origin HEAD:docs-snapshot
   
   build-docs:
     name: Build documentation (latest release)
-    needs:
-      - get_latest_release
     uses: bdunderscore/modular-avatar/.github/workflows/build-test-docs.yml@main
+    needs:
+      - snapshot-docs
     with:
-      ref: ${{ needs.get_latest_release.outputs.latest_release_tag }}
+      ref: docs-snapshot
     
   build-docs-dev:
     name: Build documentation (main branch)

.github/workflows/get-latest-release.yml

@@ -1,23 +0,0 @@
-# This is isolated to its own workflow file to avoid leaking publish secrets into the
-# github token
-name: Get latest release
-on:
-  workflow_call:
-    outputs:
-      latest_release_tag:
-        description: 'latest release tag'
-        value: ${{ jobs.get_latest_release.outputs.latest_release_tag }}
-jobs:
-  get_latest_release:
-    name: Get latest release
-    runs-on: ubuntu-latest
-    steps:
-      - uses: pozetroninc/github-action-get-latest-release@v0.7.0
-        id: latest_release
-        with:
-          repository: bdunderscore/modular-avatar
-          token: ${{ secrets.GITHUB_TOKEN }}
-          excludes: "prerelease, draft"
-      - run: echo "latest_release_tag=${{ steps.latest_release.outputs.release }}"
-    outputs:
-      latest_release_tag: ${{ steps.latest_release.outputs.release }}