Add golangci-lint cache (#4433)

* Add golangci-lint cache in CI and locally

* Use year and week number for cache key

.github/workflows/ci.yml

@@ -37,8 +37,20 @@ jobs:
       - name: check-jsonnetfmt
         run: make check-jsonnetfmt
 
+      - name: Get year and week number
+        id: get-year-week-number
+        run: echo "date=$(date +"%Yweek%U")" >> $GITHUB_OUTPUT
+
+      - name: cache golangci
+        uses: actions/cache@v4
+        with:
+          path: .cache/golangci-lint
+          key: golangci-lint-${{ runner.os }}-${{ steps.get-year-week-number.outputs.date }}-${{ hashFiles('go.mod', '.golangci.yml') }}
+
       - name: lint
-        run: make lint base=origin/${{github.base_ref}}
+        run: |
+          make lint base=origin/${{github.base_ref}}
+          sudo chown -R $(id -u):$(id -g) .cache/golangci-lint  # needed to archive cache
 
 
   unit-tests:

.gitignore

@@ -25,3 +25,4 @@ integration/e2e/deployments/e2e_integration_test[0-9]*
 .tempo.yaml
 /tmp
 gh-token.txt
+.cache

Makefile

@@ -171,9 +171,9 @@ check-jsonnetfmt: jsonnetfmt
 .PHONY: lint
 lint: # linting
 ifneq ($(base),)
-	$(TOOLS_CMD) $(LINT) run --config .golangci.yml --new-from-rev=$(base)
+	$(LINT_CMD) $(LINT) run --config .golangci.yml --new-from-rev=$(base)
 else
-	$(TOOLS_CMD) $(LINT) run --config .golangci.yml
+	$(LINT_CMD) $(LINT) run --config .golangci.yml
 endif
 
 ##@ Docker Images

build/tools.mk

@@ -17,6 +17,7 @@ TOOLS_IMAGE_TAG ?= main-e87b8d4
 GOTOOLS ?= $(shell cd $(TOOL_DIR) && go list -e -f '{{ .Imports }}' -tags tools |tr -d '[]')
 
 TOOLS_CMD = docker run --rm -t -v ${PWD}:/tools $(TOOLS_IMAGE):$(TOOLS_IMAGE_TAG)
+LINT_CMD =  docker run --rm -t -v ${PWD}:/tools -v ${PWD}/.cache/golangci-lint:/root/.cache/golangci-lint $(TOOLS_IMAGE):$(TOOLS_IMAGE_TAG)
 
 .PHONY: tools-image-build
 tools-image-build: