forgejo-ci: generate and clean-up previews when in PR

.forgejo/workflows/cleanup.yaml

@@ -0,0 +1,32 @@
+on:
+  pull_request:
+    types: [ closed, merged ]
+
+jobs:
+  cleanup:
+    runs-on: x86_64
+    container:
+      image: alpine:latest
+    steps:
+      - name: Environment setup
+        run: |
+          apk add git nodejs jq coreutils curl tree
+          echo "GITHUB_PR_NAME=$(curl -Ls ${{ github.server_url }}/api/v1/repos/${{ github.repository }}/pulls/${{ github.ref_name }} | jq .title | tr ' ' '-' | tr -d ':' | tr -d '"' | tr '[:upper:]' '[:lower:]' )" >> $GITHUB_ENV
+      - name: Public repo pull
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.PAGES_TOKEN }}
+          ref: public
+      - name: Render website
+        run: |
+          rm -rf previews/$GITHUB_PR_NAME || true
+          cd previews
+          tree -d -H '.' -L 1 --noreport --charset utf-8 -T "Versions" -o index.html
+      - name: Website upload
+        run: |
+          git config user.name "forgejo-actions[bot]"
+          git config user.email "dev@ayakael.net"
+          git add .
+          git commit -m "Clean-up $GITHUB_PR_NAME"
+          git push

.forgejo/workflows/pages.yaml

@@ -1,4 +1,7 @@
-on: [push]
+on:
+  push:
+     branches:
+       - 'main'
 
 jobs:
   render:

.forgejo/workflows/preview.yaml

@@ -0,0 +1,48 @@
+on: 
+  pull_request:
+    types: [ assigned, opened, synchronize, reopened ]
+
+jobs:
+  preview:
+    runs-on: x86_64
+    container:
+      image: alpine:latest
+    steps:
+      - name: Environment setup
+        run: |
+          apk add git ikiwiki po4a perl-yaml-tiny tree nodejs jq coreutils curl
+          echo "GITHUB_PR_NAME=$(curl -Ls ${{ github.server_url }}/api/v1/repos/${{ github.repository }}/pulls/${{ github.ref_name }} | jq .title | tr ' ' '-' | tr -d ':' | tr -d '"' | tr '[:upper:]' '[:lower:]' )" >> $GITHUB_ENV
+      - name: Repo pull
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+          token: ${{ secrets.PAGES_TOKEN }}
+      - name: Public repo pull
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          ref: public
+          path: public
+          token: ${{ secrets.PAGES_TOKEN }}
+      - name: Render website
+        run: |
+          rm -rf public/previews/$GITHUB_PR_NAME || true
+          mkdir -p public/previews/$GITHUB_PR_NAME
+          sed -i "s|destdir.*|destdir: ./public/previews/$GITHUB_PR_NAME|" ikiwiki.setup
+          ikiwiki --setup ikiwiki.setup
+          cd public/previews
+          tree -d -H '.' -L 1 --noreport --charset utf-8 -T "Versions" -o index.html
+      - name: Website upload
+        run: |
+          rm -Rf public/.forgejo
+          mkdir -p public/.forgejo/workflows
+          cp .forgejo/workflows/deploy.yaml public/.forgejo/workflows/.
+          git log -1 --pretty=%B > commit.txt
+          cd public
+          date > previews/$GITHUB_PR_NAME/generated.txt
+          # Note: the following account information will not work on GHES
+          git config user.name "forgejo-actions[bot]"
+          git config user.email "dev@ayakael.net"
+          git add .
+          git commit -F ../commit.txt
+          git push