Add ssh agent and build to workflow

.github/workflows/rust.yml

@@ -1,16 +1,21 @@
 on: [pull_request]
 
-name: Rust
+name: Build and lint
 
 jobs:
-  check:
-    name: Check
+  build:
+    name: Build protos
     runs-on: ubuntu-latest
     steps:
+      - name: Add SSH private keys for submodule repositories
+        uses: webfactory/[email protected]
+        with:
+          ssh-private-key: ${{ secrets.SSH_PROTOBUF_KEY }}
+
       - name: Checkout sources
         uses: actions/checkout@v2
         with:
-          submodules: recursive
+          submodules: true
 
       - name: Install stable toolchain
         uses: actions-rs/toolchain@v1
@@ -22,33 +27,21 @@ jobs:
       - name: Run cargo check
         uses: actions-rs/cargo@v1
         with:
-          command: check
+          command: build
 
-  test:
-    name: Test Suite
+  lints:
+    name: Use clippy to lint
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout sources
-        uses: actions/checkout@v2
-
-      - name: Install stable toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          override: true
-
-      - name: Run cargo test
-        uses: actions-rs/cargo@v1
+      - name: Add SSH private keys for submodule repositories
+        uses: webfactory/[email protected]
         with:
-          command: test
+          ssh-private-key: ${{ secrets.SSH_PROTOBUF_KEY }}
 
-  lints:
-    name: Lints
-    runs-on: ubuntu-latest
-    steps:
       - name: Checkout sources
         uses: actions/checkout@v2
+        with:
+          submodules: true
 
       - name: Install stable toolchain
         uses: actions-rs/toolchain@v1