Add Rust docs generation

.github/workflows/publish-rust-apidocs.yml

@@ -0,0 +1,43 @@
+name: Update Rust API Docs
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - rust
+  workflow_dispatch:
+
+
+jobs:
+  publish:
+    name: Generate Rust docs
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install tools
+        run: |
+          sudo apt-get update
+          sudo apt-get install rustc
+      - name: Run rust docs generation
+        run: |
+           cd rust
+           cargo doc --no-deps
+      - name: Set commit ID
+        id: vars
+        run: echo "::set-output name=sha_short::$(git rev-parse --short HEAD)"
+      - uses: actions/checkout@v2
+        with:
+          ref: gh-pages
+          clean: false
+      - name: Move API docs into target area
+        run: |
+          rm -rf docs/api/rust
+          mv rust/target/doc docs/api/rust
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v3
+        with:
+          branch: gh-pages-rustdocs-pr
+          base: gh-pages
+          title: '[Automated]: Update Rust API docs'
+          commit-message: 'Update Rust API docs to commit ${{ steps.vars.outputs.sha_short }}'
+          add-paths: docs/api/rust