Add version support to docs site

.github/workflows/docs.yml

@@ -5,7 +5,8 @@ on:
     branches:
       - main
   pull_request:
-
+  release:
+    types: [released]
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -14,9 +15,24 @@ jobs:
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps:
-      - uses: actions/checkout@v3
+
+        # This is a regex from https://semver.org/#is-there-a-suggested-regular-expression-regex-to-check-a-semver-string
+        # It is used in this GitHub action in a couple places to find semver named directories (with a 'v' on the front)
+      - name: Set SEMVER_REGEX
+        run: echo "SEMVER_REGEX='^v?(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)(?:-((?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\+([0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?$'" >> $GITHUB_ENV
+
+      - name: Checkout the current commit
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0
+
+      # If this is a new release, get the previous versions of the docs to build the full list of versions
+      - name: Checkout the gh-pages branch
+        if: github.event_name == 'release'
+        uses: actions/checkout@v3
+        with:
+          ref: gh-pages
+          path: gh-pages
 
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
@@ -26,13 +42,80 @@ jobs:
       - name: Install bundler
         run: gem install bundler:1.17.2
 
-      - name: Build doc site
-        run: make docs
+      # If this was a merge to main, set the version to "head"
+      - name: Set version env var to 'head'
+        if: github.event_name == 'push'
+        run: echo "DOCS_VERSION=head" >> $GITHUB_ENV
+
+      # If this was a release, set the version number
+      - name: Set version env var
+        if: github.event_name == 'release'
+        run: echo "DOCS_VERSION=${GITHUB_REF##*/}" >> $GITHUB_ENV
+
+      - name: Set version in _config.yml
+        run: |
+          echo "version: ${{ env.DOCS_VERSION }}" >> ./docs/_config.yml
+
+      # Only need to build the full list of versions every time there is a new release
+      # This uses a regex to determine which existing directories are "versions" and should be listed in the version.json file.
+      # The output of this command is a version.json file containing a JSON array of all semver released versions of the docs, plus "latest" and "head"
+      - name: Update version.json list
+        if: github.event_name == 'release'
+        run: ls ./gh-pages | grep -E ${{ env.SEMVER_REGEX }} | sed 's/^/"/;s/$/"/' | tr '\n' ',' | sed 's/.$//' | sed 's/^/[/;s/$/]/' | jq '. += ["${{ env.DOCS_VERSION }}"] | sort_by(.) | reverse | . += ["latest", "head"]' > ./docs/assets/js/versions.json
+
+      - name: Install dependencies
+        working-directory: docs
+        run: bundle install
+
+      - name: Build doc site version
+        working-directory: docs
+        run: bundle exec jekyll build --baseurl /firefly/${{ env.DOCS_VERSION }}
+
+      - name: Check the docs for broken links (root)
+        if: github.event_name == 'pull_request'
+        working-directory: docs
+        run: bundle exec htmlproofer --allow-hash-href --assume-extension ./_site --url-swap '^/firefly/:/' --url-ignore /127.0.0.1/,/localhost/
 
-      - name: Deploy
+      - name: Check the docs for broken links (version)
+        if: github.event_name != 'pull_request'
+        working-directory: docs
+        run: bundle exec htmlproofer --allow-hash-href --assume-extension ./_site --url-swap '^/firefly/${{ env.DOCS_VERSION }}/:/' --url-ignore /127.0.0.1/,/localhost/
+
+      - name: Deploy docs (version)
         if: github.event_name == 'push'
         uses: peaceiris/actions-gh-pages@v3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_branch: gh-pages
-          publish_dir: ./docs/_site
+          publish_dir: ./docs/_site
+          destination_dir: ./${{ env.DOCS_VERSION }}
+
+      ## FINAL STEPS TO COMPLETE IF THIS WAS A NEW RELEASE ##
+
+      - name: Copy new version into version directory
+        if: github.event_name == 'release'
+        working-directory: docs
+        run: mv _site ${{ env.DOCS_VERSION }}
+
+      # This uses a regex from to determine which existing directories are "versions" and should be copied over
+      - name: Copy existing versions into working directory
+        if: github.event_name == 'release'
+        run: ls ./gh-pages | grep -E ${{ env.SEMVER_REGEX }} | xargs -I '{}' mv './gh-pages/{}' ./docs
+
+      - name: Copy existing 'head' directory into working directory
+        if: github.event_name == 'release'
+        run: mv ./gh-pages/head ./docs
+
+      - name: Build doc site (latest)
+        if: github.event_name == 'release'
+        working-directory: docs
+        run: bundle exec jekyll build --baseurl /firefly
+
+      - name: Deploy docs (latest)
+        if: github.event_name == 'release'
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_branch: gh-pages
+          publish_dir: ./docs/_site
+

docs/_config.yml

@@ -9,10 +9,6 @@ aux_links:
     - "https://wiki.hyperledger.org/display/FIR"
   "Discord":
     - "https://discord.gg/hyperledger"
-  "Mailing List":
-    - "https://lists.hyperledger.org/g/firefly"
-  "Calendar":
-    - "https://lists.hyperledger.org/g/firefly/calendar"
 color_scheme: firefly
 plugins:
   - jekyll-multiple-languages-plugin

docs/_includes/head.html

@@ -31,6 +31,8 @@
   {% endif %}
   <script type="text/javascript" src="{{ '/assets/js/just-the-docs.js' | relative_url }}"></script>
 
+  <script type="text/javascript" src="/firefly/assets/js/versions.js" data-proofer-ignore></script>
+
   <meta name="viewport" content="width=device-width, initial-scale=1">
 
   {% seo %}

docs/_layouts/default.html

@@ -117,6 +117,15 @@
                 </div>
               </span>
             </li>
+            <li class="aux-nav-list-item">
+              <span class="dropdown">
+                <a class="site-button">
+                  Version: {{ site.version | default: "latest" }}
+                </a>
+                <div class="dropdown-content" id="versionDropdown">
+                </div>
+              </span>
+            </li>
           </ul>
         </nav>
       {% endif %}
@@ -222,5 +231,8 @@ <h2 class="text-delta">Table of contents</h2>
       <div class="search-overlay"></div>
     {% endif %}
   </div>
+  <script>
+    getVersions("{{ site.lang }}")
+  </script>
 </body>
 </html>

docs/assets/js/versions.js

@@ -0,0 +1,20 @@
+async function getVersions(lang) {
+    response = await fetch('/firefly/assets/js/versions.json');
+    versions = await response.json();
+
+    versionDropdown = document.getElementById('versionDropdown');
+
+    versions.forEach(version => {
+        versionLink = document.createElement('a');
+        url = '/firefly/';
+        if (version != 'latest') {
+            url += version + '/' ;
+        }
+        if (lang != null && lang != '' && lang != 'en') {
+            url += lang + '/';
+        }
+        versionLink.href = url;
+        versionLink.innerText = version;
+        versionDropdown.appendChild(versionLink)
+    });
+}

docs/assets/js/versions.json

@@ -0,0 +1,3 @@
+[
+  "latest"
+]

docs/tutorials/query_messages.md

@@ -28,7 +28,7 @@ This builds on the APIs to query and filter messages, described below
 
 ## Additional info
 
-- Reference: [API Query Syntax](/firefly/reference/api_query_syntax.html)
+- Reference: [API Query Syntax](../reference/api_query_syntax.html)
 - Swagger: <a href="../swagger/swagger.html#/Default%20Namespace/getMsgs" data-proofer-ignore>GET /api/v1/namespaces/{ns}/messages</a>
 
 ### Example 1: Query confirmed messages