Add caching dupe change

.github/actions/cache/action.yml

@@ -0,0 +1,11 @@
+name: Cache
+description: 'Caches cargo dependencies'
+runs:
+  using: composite
+  steps:
+    - uses: actions/cache@v3 
+      with: 
+        path: | 
+          ~/.cargo/ 
+        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.toml') }}
+

.github/workflows/ci.yml

@@ -90,12 +90,9 @@ jobs:
     steps:
     - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
 
-    - uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2 # v4.0.0
-      with:
-        path: |
-          ~/.cargo/
-        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.toml') }}
-
+    - name: Populate cache
+      uses: ./.github/actions/cache
+
     - name: Configure environment variables
       run: |
         set -eo pipefail
@@ -346,12 +343,9 @@ jobs:
     steps:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
 
-      - uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2 # v4.0.0
-        with:
-          path: |
-            ~/.cargo/
-          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.toml') }}
-
+      - name: Populate cache
+        uses: ./.github/actions/cache
+
       - name: Check README.md
         run: |
           set -eo pipefail
@@ -370,13 +364,10 @@ jobs:
     name: Check MSRVs match
     steps:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-
-      - uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2 # v4.0.0
-        with:
-          path: |
-            ~/.cargo/
-          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.toml') }}
-
+
+      - name: Populate cache
+        uses: ./.github/actions/cache
+
       # Make sure that the MSRV in zerocopy's and zerocopy-derive's `Cargo.toml`
       # files are the same. In CI, we test with a single MSRV (the one indicated
       # in zerocopy's `Cargo.toml`), so it's important that:
@@ -414,11 +405,8 @@ jobs:
     steps:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
 
-      - uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2 # v4.0.0
-        with:
-          path: |
-            ~/.cargo/
-          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.toml') }}
+      - name: Populate cache
+        uses: ./.github/actions/cache
 
       # Make sure that both crates are at the same version, and that zerocopy
       # depends exactly upon the current version of zerocopy-derive. See
@@ -485,20 +473,16 @@ jobs:
           assert-match "$zerocopy_derive_dep_ver" "$zerocopy_derive_targeted_ver" \
             "Same crate version ($zerocopy_derive_dep_ver) found for optional and targeted zerocopy-derive dependency." \
             "Different crate versions found for optional ($zerocopy_derive_dep_ver) and targeted ($zerocopy_derive_targeted_ver) dependency."
-
   generate_cache:
     runs-on: ubuntu-latest
     name: Generate cache
     steps:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
 
-      - uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2 # v4.0.0
-        with:
-          path: |
-            ~/.cargo/
-          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.toml') }}
-
       - name: Populate cache
+        uses: ./.github/actions/cache
+
+      - name: Download dependencies
         run: |
           # Ensure all dependencies are downloaded - both for our crates and for
           # tools we use in CI. We don't care about these tools succeeding for
@@ -519,7 +503,6 @@ jobs:
           cargo install cargo-readme --version 3.2.0 &> /dev/null || true
           cargo install --locked kani-verifier       &> /dev/null || true
           cargo kani setup                           &> /dev/null || true
-
   check-all-toolchains-tested:
     runs-on: ubuntu-latest
     name: Check that all toolchains listed in Cargo.toml are tested in CI
@@ -544,7 +527,6 @@ jobs:
             <(cargo metadata --format-version 1 | \
               jq -r ".packages[] | select(.name == \"zerocopy\").metadata.\"build-rs\" | keys | .[]" | \
               sort -u)
-
   check-job-dependencies:
     runs-on: ubuntu-latest
     name: Check all-jobs-succeeded depends on all jobs