Use multiple paths feature for cache step

Author: Sora Morimoto

.github/workflows/linuxci.yml

@@ -7,21 +7,14 @@ jobs:
     name: GNU/Linux CI
     runs-on: ubuntu-latest
     steps:
-      - name: Cache cargo registry
+      - name: Cache cargo
         uses: actions/cache@v2
         with:
-          path: ~/.cargo/registry
-          key: ${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
-      - name: Cache cargo index
-        uses: actions/cache@v2
-        with:
-          path: ~/.cargo/git
-          key: ${{ runner.os }}-cargo-index-${{ hashFiles('**/Cargo.lock') }}
-      - name: Cache cargo build
-        uses: actions/cache@v2
-        with:
-          path: target
-          key: ${{ runner.os }}-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}
+          path: |
+            ~/.cargo/git
+            ~/.cargo/registry
+            target
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
 
       - uses: actions/checkout@v2
       - name: Install latest stable toolchain

.github/workflows/macosci.yml

@@ -7,21 +7,14 @@ jobs:
     name: macOS CI
     runs-on: macos-latest
     steps:
-      - name: Cache cargo registry
+      - name: Cache cargo
         uses: actions/cache@v2
         with:
-          path: ~/.cargo/registry
-          key: ${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
-      - name: Cache cargo index
-        uses: actions/cache@v2
-        with:
-          path: ~/.cargo/git
-          key: ${{ runner.os }}-cargo-index-${{ hashFiles('**/Cargo.lock') }}
-      - name: Cache cargo build
-        uses: actions/cache@v2
-        with:
-          path: target
-          key: ${{ runner.os }}-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}
+          path: |
+            ~/.cargo/git
+            ~/.cargo/registry
+            target
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
 
       - uses: actions/checkout@v2
       - name: Install latest stable toolchain