Moved back section to strategies

caching-strategies.md

@@ -252,3 +252,61 @@ steps:
       path: path/to/dependencies
       key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
 ```
+
+### Saving cache once and reusing in multiple workflows
+
+In case of multi-module projects, where the built artifact of one project needs to be reused in subsequent child modules, the need of rebuilding the parent module again and again with every build can be eliminated. The `actions/cache` or `actions/cache/save` action can be used to build and save the parent module artifact once, and restored multiple times while building the child modules.
+
+#### Step 1 - Build the parent module and save it
+
+```yaml
+name: Saving Primes
+
+on: push
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Generate primes
+      run: ./generate-primes.sh
+      
+    - name: Save Primes
+      id: cache-primes-save
+    - uses: actions/cache/save@v3
+      with:
+        path: |
+          path/to/dependencies
+          some/other/dependencies
+        key: ${{ runner.os }}-primes
+```
+
+#### Step 2 - Restore the built artifact from cache using the same key and path
+
+```yaml
+name: Restoring Primes
+
+on: push
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Restoring Primes
+      id: cache-primes-restore
+    - uses: actions/cache/restore@v3
+      with:
+        path: |
+          path/to/dependencies
+          some/other/dependencies
+        key: ${{ runner.os }}-primes
+    .
+    .
+    . //remaining workflow steps continued
+```