added clippy workflow #428 (#429)

* added clippy workflow #428

* fixed action yaml to run clippy #428

* fixed indent

* fixed workflow

* fixed workflow error

* fixed indent

* changed no annotation #428

* adujusted annotation version

* fixed clippy::needless_match

* remove if let exception

* removed unnecessary permission check #428

.github/workflows/rust.yml

@@ -14,19 +14,26 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
-      with:
-        submodules: recursive
-    - uses: actions-rs/toolchain@v1
-      with:
-        toolchain: nightly
-        profile: minimal
-        components: rustfmt
-        override: true
-    - name: Fmt Check
-      run: cargo fmt -- --check
-    - name: Build
-      run: cargo build --verbose
-    - name: Run tests
-      run: cargo test --verbose
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: nightly
+          profile: minimal
+          components: rustfmt
+          override: true
+      - name: Fmt Check
+        run: cargo fmt -- --check
+      - name: Prepare Clippy
+        run: rustup component add clippy
+      - name: Run clippy action to produce annotations
+        uses: actions-rs/clippy-check@v1
+        with:
+          args: --all-targets -- -D warnings
+          token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build
+        run: cargo build --verbose
+      - name: Run tests
+        run: cargo test --verbose