Add comprehensive dependency caching to workflows (APT, pip, Ruby gems, Docker) (#720)

* Initial plan

* Add comprehensive caching to all workflows for improved performance

Co-authored-by: pethers <[email protected]>

* Add comprehensive caching strategy documentation

Co-authored-by: pethers <[email protected]>

* Fix cache keys to remove non-existent file references (code review feedback)

Co-authored-by: pethers <[email protected]>

* Update action versions to latest releases (setup-python v6.1.0, setup-ruby v1.270.0)

Co-authored-by: pethers <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: pethers <[email protected]>

Author: Copilot

.github/workflows/main.yml

@@ -43,6 +43,47 @@ jobs:
             api.snapcraft.io:443
       - name: Checkout
         uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      
+      - name: Cache APT packages
+        uses: actions/cache@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
+        with:
+          path: |
+            /var/cache/apt/archives
+            /var/lib/apt/lists
+          key: ${{ runner.os }}-apt-${{ hashFiles('.github/workflows/main.yml') }}
+          restore-keys: |
+            ${{ runner.os }}-apt-
+      
+      - name: Setup Python
+        uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+        with:
+          python-version: '3.12'
+      
+      - name: Cache Python dependencies
+        uses: actions/cache@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
+        with:
+          path: |
+            ~/.cache/pip
+            ~/.local/lib/python3.12/site-packages
+          key: ${{ runner.os }}-pip-cfn-lint-checkov-${{ hashFiles('.github/workflows/main.yml') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-cfn-lint-checkov-
+            ${{ runner.os }}-pip-
+      
+      - name: Setup Ruby
+        uses: ruby/setup-ruby@ac793fdd38cc468a4dd57246fa9d0e868aba9085 # v1.270.0
+        with:
+          ruby-version: '3.3'
+      
+      - name: Cache Ruby gems
+        uses: actions/cache@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
+        with:
+          path: vendor/bundle
+          key: ${{ runner.os }}-gems-cfn-nag-${{ hashFiles('.github/workflows/main.yml') }}
+          restore-keys: |
+            ${{ runner.os }}-gems-cfn-nag-
+            ${{ runner.os }}-gems-
+      
       - name: Testing with CFN Lint Command
         uses: scottbrenner/cfn-lint-action@25ee47d1ab3146bda904df745511735cc0b9a970 # v2.5.2
         with:
@@ -165,6 +206,19 @@ jobs:
           capabilities: CAPABILITY_NAMED_IAM
           no-fail-on-empty-changeset: "1"
           parameter-overrides: "StackIrland=${{ env.StackId }},StackFrankfurt=${{ env.StackId2 }}"
+      
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@c47758b77c9736f4b2ef4073d4d51994fabfe349 # v3.7.1
+      
+      - name: Cache Docker layers
+        uses: actions/cache@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-docker-zap-${{ hashFiles('.github/workflows/main.yml') }}
+          restore-keys: |
+            ${{ runner.os }}-docker-zap-
+            ${{ runner.os }}-docker-
+      
       - name: ZAP API Scan
         uses: zaproxy/action-api-scan@5158fe4d9d8fcc75ea204db81317cce7f9e5453d # v0.10.0
         with:

.github/workflows/pullrequest.yml

@@ -22,6 +22,47 @@ jobs:
             docs.github.com:433
             api.github.com:443
       - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      
+      - name: Cache APT packages
+        uses: actions/cache@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
+        with:
+          path: |
+            /var/cache/apt/archives
+            /var/lib/apt/lists
+          key: ${{ runner.os }}-apt-${{ hashFiles('.github/workflows/pullrequest.yml') }}
+          restore-keys: |
+            ${{ runner.os }}-apt-
+      
+      - name: Setup Python
+        uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+        with:
+          python-version: '3.12'
+      
+      - name: Cache Python dependencies
+        uses: actions/cache@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
+        with:
+          path: |
+            ~/.cache/pip
+            ~/.local/lib/python3.12/site-packages
+          key: ${{ runner.os }}-pip-cfn-lint-checkov-${{ hashFiles('.github/workflows/pullrequest.yml') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-cfn-lint-checkov-
+            ${{ runner.os }}-pip-
+      
+      - name: Setup Ruby
+        uses: ruby/setup-ruby@ac793fdd38cc468a4dd57246fa9d0e868aba9085 # v1.270.0
+        with:
+          ruby-version: '3.3'
+      
+      - name: Cache Ruby gems
+        uses: actions/cache@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
+        with:
+          path: vendor/bundle
+          key: ${{ runner.os }}-gems-cfn-nag-${{ hashFiles('.github/workflows/pullrequest.yml') }}
+          restore-keys: |
+            ${{ runner.os }}-gems-cfn-nag-
+            ${{ runner.os }}-gems-
+      
       - name: Run StandardLint
         uses: mikaelvesavuori/standardlint-action@b376b6d6afc5885d102894f6972133fa91d200f0 # v1.0.5
         env: