Deploy preview site to review pull requests (#5)

Signed-off-by: Benoit Donneaux <benoit@leastauthority.com>
Reviewed-on: #5
Co-authored-by: Benoit Donneaux <benoit@leastauthority.com>
Co-committed-by: Benoit Donneaux <benoit@leastauthority.com>

.gitea/pr-commenter.yml

@@ -0,0 +1,28 @@
+comment:
+  glob-options:
+    dot: true
+  snippets:
+    - id: image-{{ imageOutcome }}
+      files:
+        - '**'
+      body: |
+        #### :hammer: Docker build `{{ imageOutcome }}`
+
+    - id: build-{{ buildOutcome }}
+      files:
+        - '**'
+      body: |
+        #### :wrench: Jekyll build `{{ buildOutcome }}`
+
+    - id: deploy-{{ deployOutcome }}
+      files:
+        - '**'
+      body: |
+        #### :rocket: Jekyll deploy `{{ deployOutcome }}`
+        #### :link: Preview site [here](https://{{ deployWebHost }}{{ deployWebContext }})
+
+    - id: pusher-{{ gitActor }}-{{ gitEventName }}-{{ gitRunNumber }}
+      files:
+        - '**'
+      body: |
+        *Pusher: @{{ gitActor }}, Action: `{{ gitEventName }}`, Workflow: `{{ gitWorkflow }}`, Run: {{ gitRunNumber }}*

.gitea/workflows/jekyll.yaml

@@ -8,6 +8,9 @@ on:
 env:
   _UID: 1000
   _GID: 1000
+  WEB_DOMAIN: lafs.eval.latfa.net
+  WEB_USER: www
+  WEB_DIR: /var/www
 jobs:
   jekyll:
     runs-on: ubuntu-22.04
@@ -41,18 +44,52 @@ jobs:
       - name: Build Jekyll site
         id: build_site
         run: |
+          # Overwrite the baseurl for previewonly
+          if [ "${{ gitea.event_name }}" = 'pull_request' ]; then
+            echo "Overwriting baseurl for pull_request ${{ gitea.event.pull_request.number }}"
+            sed -i -r -e 's/^baseurl:\s*"([^"]*)"/baseurl: "\1\/${{ gitea.event.pull_request.number }}"/' _config.yml
+            grep "^baseurl:" _config.yml
+          fi
           docker-compose run --rm -v "${JOB_CONTAINER_NAME}:/site" -w /site \
           jekyll build --verbose
-      - name: Prepare ssh key
-        id: prepare_ssh_key
-        if: ${{ gitea.ref == 'refs/heads/main' }}
+      - name: Deploy Jekyll site
+        id: deploy_site
         run: |
+          if [ "${{ gitea.ref }}" = 'refs/heads/main' ]; then
+            WEB_ROOT="${WEB_DIR}/site"
+            WEB_HOST="www.${WEB_DOMAIN}"
+            WEB_CONTEXT='/'
+          else
+            WEB_ROOT="${WEB_DIR}/preview"
+            WEB_HOST="preview.${WEB_DOMAIN}"
+            WEB_CONTEXT='/${{ gitea.event.pull_request.number }}/'
+          fi
+          # Save those variabes in the environment for the next steps
+          echo "WEB_HOST=${WEB_HOST}" >> $GITHUB_ENV
+          echo "WEB_CONTEXT=${WEB_CONTEXT}" >> $GITHUB_ENV
+          # Prepare ssh key
           echo "${{ secrets.WWW_DEPLOY_KEY }}" > ~/.ssh/id_ed25519
           chmod 600 ~/.ssh/id_ed25519
-      - name: Publish Jekyll site
-        id: publish_site
-        if: ${{ gitea.ref == 'refs/heads/main' }}
-        run: |
-          rsync -halvi \
+          # Synchronize the local and the remote site
+          rsync -halvi --delete \
             -e "ssh -a -x -o StrictHostKeyChecking=no" \
-            ./_site/ www@lafs.eval.latfa.net:/var/www/site/
+            ./_site/ "${WEB_USER}@${WEB_DOMAIN}:${WEB_ROOT}${WEB_CONTEXT}"
+      - name: Comment pull request
+        id: comment_pull_request
+        if: ${{ always() && gitea.event_name == 'pull_request' }}
+        uses: exercism/pr-commenter-action@v1.5.1
+        with:
+          template-variables: |
+            {
+              "imageOutcome": "${{ steps.build_image.outcome }}",
+              "buildOutcome": "${{ steps.build_site.outcome }}",
+              "deployOutcome": "${{ steps.deploy_site.outcome }}",
+              "deployWebHost": "${{ env.WEB_HOST }}",
+              "deployWebContext": "${{ env.WEB_CONTEXT }}",
+              "gitActor": "${{ gitea.actor }}",
+              "gitEventName": "${{ gitea.event_name }}",
+              "gitWorkflow": "${{ gitea.workflow }}",
+              "gitRunNumber": "${{ gitea.run_number }}",
+              "gitRunAttempt": "${{ gitea.run_attempt }}"
+            }
+          config-file: ".gitea/pr-commenter.yml"

.gitea/workflows/jekyll_cleanup.yml

@@ -0,0 +1,30 @@
+name: Jekyll cleanup
+
+# only trigger on pull request closed events
+on:
+  pull_request:
+    types: [ closed ]
+
+env:
+  WEB_DOMAIN: lafs.eval.latfa.net
+  WEB_USER: www
+  WEB_ROOT: /var/www/preview
+  WEB_CONTEXT: "/${{ gitea.event.pull_request.number }}/"
+jobs:
+  jekyll_cleanup:
+    runs-on: ubuntu-22.04
+    permissions:
+      pull-requests: write
+      actions: read
+      contents: read
+    steps:
+      - name: Cleanup Jeyll preview
+        id: cleanup_preview
+        run: |
+          # Prepare ssh key
+          echo "${{ secrets.WWW_DEPLOY_KEY }}" > ~/.ssh/id_ed25519
+          chmod 600 ~/.ssh/id_ed25519
+          # Delete preview context from the remote site
+          sudo apt install -y lftp
+          echo -e "set sftp:connect-program ssh -a -x -o StrictHostKeyChecking=no; rm -r -f ${WEB_ROOT}${WEB_CONTEXT}\nbye" \
+          | lftp sftp://${WEB_USER}:unused@${WEB_DOMAN}

src/_includes/head/custom.html

@@ -1,5 +1,5 @@
 <!-- start custom head snippets -->
 
-<link href="/assets/images/favicon.ico" rel="shortcut icon" type="image/x-icon">
+<link href="assets/images/favicon.ico" rel="shortcut icon" type="image/x-icon">
 
 <!-- end custom head snippets -->

src/_posts/2020-09-08-welcome.md

@@ -6,7 +6,7 @@ excerpt: "Welcome to Dummy Jekyll"
 header:
   teaser: /assets/images/posts/unsplash-welcome.jpg
 gallery:
-  - image_path: assets/images/posts/unsplash-welcome.jpg
+  - image_path: /assets/images/posts/unsplash-welcome.jpg
     alt: "welcome"
 ---
 {% include gallery %}

src/_posts/2020-09-09-post-1.md

@@ -6,7 +6,7 @@ excerpt: "This is a generic post."
 header:
   teaser: /assets/images/posts/unsplash-post.jpg
 gallery:
-  - image_path: assets/images/posts/unsplash-post.jpg
+  - image_path: /assets/images/posts/unsplash-post.jpg
     alt: "post"
 ---
 {% include gallery %}

src/_posts/2020-09-09-post-2.md

@@ -6,7 +6,7 @@ excerpt: "This is a generic post."
 header:
   teaser: /assets/images/posts/unsplash-post.jpg
 gallery:
-  - image_path: assets/images/posts/unsplash-post.jpg
+  - image_path: /assets/images/posts/unsplash-post.jpg
     alt: "post"
 ---
 {% include gallery %}

src/_posts/2020-09-09-post-3.md

@@ -6,7 +6,7 @@ excerpt: "This is a generic post."
 header:
   teaser: /assets/images/posts/unsplash-post.jpg
 gallery:
-  - image_path: assets/images/posts/unsplash-post.jpg
+  - image_path: /assets/images/posts/unsplash-post.jpg
     alt: "post"
 ---
 {% include gallery %}

src/_sass/_custom.scss

@@ -12,24 +12,24 @@
 }*/
 /*
 .page__hero--overlay {
-  background: url(/assets/images/pattern-4.gif) repeat left top;
+  background: url(../images/pattern-4.gif) repeat left top;
 }
 */
 .initial-content {
   //position: relative;
   //top: 70px;
-  background: url(/assets/images/pattern-1.png) repeat left top;
+  background: url(../images/pattern-1.png) repeat left top;
 }
 /*
 #about {
-  background: url(/assets/images/pattern-2.gif) repeat left top;
+  background: url(../images/pattern-2.gif) repeat left top;
 }
 
 @font-face {
   font-family: "homestead_regularregular";
   font-style: normal;
   font-weight: normal;
-  src: url("/assets/fonts/homestead-regular-webfont.woff") format("woff");
+  src: url("../fonts/homestead-regular-webfont.woff") format("woff");
 }
 
 h1, h2, h3, h4, h5, h6, .archive__item-title, .masthead__inner-wrap {

src/index.html

@@ -24,7 +24,7 @@ documentation_list:
     url: "https://tahoe-lafs.readthedocs.io/en/latest/about-tahoe.html"
     btn_label: "Read More"
     btn_class: "btn--primary"
-  - image_path: assets/images/manual.jpg
+  - image_path: /assets/images/manual.jpg
     image_caption: "Image courtesy of [Unsplash](https://unsplash.com/)"
     alt: "manual"
     title: "Manual"
@@ -44,7 +44,7 @@ contribute:
   - title: "Get Involved"
     excerpt: ""
 contribute_list:
-  - image_path: assets/images/mailing.jpg
+  - image_path: /assets/images/mailing.jpg
     image_caption: "Image courtesy of [Unsplash](https://unsplash.com/)"
     alt: "mailing"
     title: "Mailing list"
@@ -96,10 +96,10 @@ about:
   <div class="grid__item">
     <article class="archive__item" itemscope itemtype="https://schema.org/CreativeWork">
       <div class="archive__item-teaser">
-        <img src="{{post.header.teaser}}" alt="">
+        <img src="{{ post.header.teaser | relative_url }}" alt="">
       </div>
       <h2 class="archive__item-title" itemprop="headline">
-        <a href="{{ post.url }}" rel="permalink">{{ post.title }}</a>
+        <a href="{{ post.url | relative_url }}" rel="permalink">{{ post.title }}</a>
       </h2>
       <p class="archive__item-excerpt" itemprop="description">{{ post.excerpt }}</p>
     </article>