Only run tests when rust files have changed (#443)

Author: quodlibetor

.github/workflows/lint.yml

@@ -0,0 +1,25 @@
+name: lint
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+      - name: Lint
+        run: bash ci/lint.sh
+      - name: Run ShellCheck
+        uses: ludeeus/action-shellcheck@master
+        with:
+          check_together: 'y'

.github/workflows/test.yml

@@ -3,8 +3,10 @@ name: test
 on:
   push:
     branches: [master]
+    paths: '**.rs'
   pull_request:
     branches: [master]
+    paths: '**.rs'
 
 jobs:
   test:
@@ -51,23 +53,6 @@ jobs:
           RUST_VERSION: ${{ matrix.rust_version }}
           EXHAUSTIVE_TZ: ${{ matrix.exhaustive_tz }}
 
-  lint:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v2
-      - name: Install rust
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-          override: true
-      - name: Lint
-        run: bash ci/lint.sh
-      - name: Run ShellCheck
-        uses: ludeeus/action-shellcheck@master
-        with:
-          check_together: 'y'
-
   no_std:
     strategy:
       matrix: