Merge 8645982dff into 4a28cbc054

Update examples to use latest available checkout action v4.

README.md

@@ -91,7 +91,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Cache Primes
       id: cache-primes
@@ -122,7 +122,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Restore cached Primes
       id: cache-primes-restore
@@ -229,7 +229,7 @@ Example:
 
 ```yaml
 steps:
-  - uses: actions/checkout@v3
+  - uses: actions/checkout@v4
 
   - uses: actions/cache@v4
     id: cache
@@ -259,7 +259,7 @@ jobs:
   build-linux:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Cache Primes
         id: cache-primes
@@ -286,7 +286,7 @@ jobs:
   build-windows:
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Cache Primes
         id: cache-primes

examples.md

@@ -596,7 +596,26 @@ whenever possible:
       ~/.cargo/registry/cache/
       ~/.cargo/git/db/
       target/
-    key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+    key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock', 'rust-toolchain.toml') }}
+```
+
+Since Rust compile times are so long, you might want to take advantage of incremental builds. To do this, use the configuration below.
+- Include the `run_id` in the key to force `actions/cache` to upload a new snapshot after every build.
+- Use `restore-keys:` to load the previous build (when there are multiple partial matches, it selects the most recent).
+
+```yaml
+- uses: actions/cache@v3
+  with:
+    path: |
+      ~/.cargo/bin/
+      ~/.cargo/registry/index/
+      ~/.cargo/registry/cache/
+      ~/.cargo/git/db/
+      ~/.rustup/
+      target/
+    key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock', 'rust-toolchain.toml') }}-${{ github.run_id }}
+    restore-keys: |
+      ${{ runner.os }}-cargo-${{ hashFiles(**/'Cargo.lock', 'rust-toolchain.toml') }}
 ```
 
 ## Scala - SBT