feat(lint): Cache necessary files for lint:check-cpp-static-full to skip unnecessary re-runs.

.github/workflows/clp-core-build-macos.yaml

@@ -89,8 +89,37 @@ jobs:
           --num-jobs $(getconf _NPROCESSORS_ONLN)
           --test-spec "~[Stopwatch]"
 
+      # NOTE: We don't use the cache for scheduled runs so that they run lint:check-cpp-static-full
+      # on all files.
+      - if: "'schedule' != github.event_name"
+        name: "Restore lint:check-cpp-static-full cache"
+        id: "cache-restore-lint-check-cpp-static-full"
+        uses: "actions/cache/restore@5a3ec84eff668545956fd18022155c47e93e2684"
+        with:
+          path: |
+            .task/checksum/lint-check-cpp-static-full
+            .task/checksum/utils-cpp-lint-clang-tidy-*
+            build/lint-clang-tidy
+
+          # NOTE: We use a per-OS cache since different OSes may trigger different clang-tidy
+          # violations.
+          key: "main-branch-${{matrix.os}}-lint:check-cpp-static-full"
+
       # TODO: When enough files are passing clang-tidy, switch to a full pass on schedule only.
       # - run: >-
       #     task lint:check-cpp-${{(github.event_name == 'schedule') && 'full' || 'diff'}}
       - run: "task lint:check-cpp-full"
         shell: "bash"
+
+      # Cache the source file checksums and the generated files (logs) for the
+      # lint:check-cpp-static-full task, but only if it runs successfully on the main branch.
+      # NOTE: If we don't cache the generated files, the task will re-run to generate them.
+      - if: "'pull_request' != github.event_name && 'refs/heads/main' == github.ref"
+        name: "Update lint:check-cpp-static-full cache"
+        uses: "actions/cache/save@5a3ec84eff668545956fd18022155c47e93e2684"
+        with:
+          path: |
+            .task/checksum/lint-check-cpp-static-full
+            .task/checksum/utils-cpp-lint-clang-tidy-*
+            build/lint-clang-tidy
+          key: "${{steps.cache-restore-lint-check-cpp-static-full.outputs.cache-primary-key}}"

.github/workflows/clp-core-build.yaml

@@ -327,6 +327,22 @@ jobs:
         run: "chown $(id -u):$(id -g) -R ."
         shell: "bash"
 
+      # NOTE: We don't use the cache for scheduled runs so that they run lint:check-cpp-static-full
+      # on all files.
+      - if: "'schedule' != github.event_name"
+        name: "Restore lint:check-cpp-static-full cache"
+        id: "cache-restore-lint-check-cpp-static-full"
+        uses: "actions/cache/restore@5a3ec84eff668545956fd18022155c47e93e2684"
+        with:
+          path: |
+            .task/checksum/lint-check-cpp-static-full
+            .task/checksum/utils-cpp-lint-clang-tidy-*
+            build/lint-clang-tidy
+
+          # NOTE: We use a per-OS cache since different OSes may trigger different clang-tidy
+          # violations.
+          key: "main-branch-ubuntu-jammy-lint:check-cpp-static-full"
+
       - uses: "./.github/actions/run-on-image"
         env:
           OS_NAME: "ubuntu-jammy"
@@ -339,3 +355,16 @@ jobs:
           # run_command: >-
           #   task lint:check-cpp-${{(github.event_name == 'schedule') && 'full' || 'diff'}}
           run_command: "task lint:check-cpp-full"
+
+      # Cache the source file checksums and the generated files (logs) for the
+      # lint:check-cpp-static-full task, but only if it runs successfully on the main branch.
+      # NOTE: If we don't cache the generated files, the task will re-run to generate them.
+      - if: "'pull_request' != github.event_name && 'refs/heads/main' == github.ref"
+        name: "Update lint:check-cpp-static-full cache"
+        uses: "actions/cache/save@5a3ec84eff668545956fd18022155c47e93e2684"
+        with:
+          path: |
+            .task/checksum/lint-check-cpp-static-full
+            .task/checksum/utils-cpp-lint-clang-tidy-*
+            build/lint-clang-tidy
+          key: "${{steps.cache-restore-lint-check-cpp-static-full.outputs.cache-primary-key}}"