Replace remaining CircleCI jobs with GHA (#3505)

Apparently the `build-docs` step is already happening, so we just need to port
the schema and example validation jobs.

.circleci/config.yml

@@ -1,73 +0,0 @@
-gendoc: &gendoc
-  name: Generate the docs
-  # Note: Node dependencies are required for the hugo build.
-  # Note: We use a custom config file for circleci due to some specifics with hosting the
-  #       site using CircleCI's artifacts platform. See config-circleci.toml for details.
-  command: |
-    apk add nodejs npm git hugo
-    npm i
-    cat config-circleci.toml config.toml > hugo-config.toml
-    hugo --config hugo-config.toml --baseURL "/${CIRCLE_NODE_INDEX}/public"
-
-genswagger: &genswagger
-  name: Validate sources and generate swagger json
-  command: |
-    source /env/bin/activate
-    scripts/check-swagger-sources.py
-    scripts/dump-swagger.py
-
-checkexamples: &checkexamples
-  name: Check Event Examples
-  command: |
-    source /env/bin/activate
-    scripts/check-event-schema-examples.py
-
-validateapi: &validateapi
-  name: Validate OpenAPI specifications
-  command: |
-    cd scripts
-    npm install
-    node validator.js -s "../data/api/client-server"
-
-version: 2
-jobs:
-  validate-docs:
-    docker:
-      - image: node:alpine
-    steps:
-      - checkout
-      - run: *validateapi
-  check-docs:
-    docker:
-      - image: uhoreg/matrix-doc-build
-    steps:
-      - checkout
-      - run: *checkexamples
-  build-docs:
-    docker:
-      - image: alpine
-    steps:
-      # Note: We install git in the image so we can pull git submodules. The hugo theme in use
-      # is a git submodule, which has its own submodules, and all need to be loaded.
-      - run: apk add git
-      - checkout
-      - run: git submodule update --init --recursive
-      - run: *gendoc
-      - store_artifacts:
-          path: public
-      - run:
-          name: "Doc build is available at:"
-          command: DOCS_URL="${CIRCLE_BUILD_URL}/artifacts/${CIRCLE_NODE_INDEX}/public/index.html"; echo $DOCS_URL
-
-workflows:
-  version: 2
-
-  build-spec:
-    jobs:
-      - build-docs
-      - check-docs
-      - validate-docs
-
-notify:
-  webhooks:
-    - url: https://giles.cadair.dev/circleci

.github/workflows/main.yml

@@ -9,6 +9,36 @@ on:
   workflow_dispatch:
 
 jobs:
+  validate-openapi:
+    name: "🔎 Validate OpenAPI specifications"
+    runs-on: ubuntu-latest
+    steps:
+      - name: "📥 Source checkout"
+        uses: actions/checkout@v2
+      - name: "➕ Setup Node"
+        uses: actions/setup-node@v2
+        with:
+          node-version: '14'
+      - name: "⚙️ npm"
+        working-directory: "./scripts"
+        run: |
+          npm install
+      - name: "🔎 Run validator"
+        working-directory: "./scripts"
+        run: |
+          node validator.js -s "../data/api/client-server"
+
+  check-examples:
+    name: "🔎 Check Event schema examples"
+    runs-on: ubuntu-latest
+    container: uhoreg/matrix-doc-build
+    steps:
+      - name: "📥 Source checkout"
+        uses: actions/checkout@v2
+      - name: "🔎 Run validator"
+        run: |
+          /env/bin/python scripts/check-event-schema-examples.py
+        
   build-openapi:
     name: "🐍 Build OpenAPI definitions"
     runs-on: ubuntu-latest