Improve build times

Author: ciarams87

.github/.cache/buster-for-binary

@@ -137,7 +137,7 @@ jobs:
           go-version: stable
           cache-dependency-path: |
             go.sum
-            .github/.cache/buster-for-vars
+            tests/go.sum
 
       - name: Check for changes
         uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36 # v3.0.2
@@ -192,7 +192,7 @@ jobs:
           go-version: stable
           cache-dependency-path: |
             go.sum
-            .github/.cache/buster-for-unit-tests
+            tests/go.sum
 
       - name: Run Tests
         run: make unit-test
@@ -221,6 +221,8 @@ jobs:
         uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6.0.0
         with:
           node-version-file: .nvmrc
+          cache: 'npm'
+          cache-dependency-path: internal/controller/nginx/modules/package-lock.json
 
       - name: Run tests
         run: npm --prefix ${{ github.workspace }}/internal/controller/nginx/modules install-ci-test
@@ -267,7 +269,7 @@ jobs:
           go-version: stable
           cache-dependency-path: |
             go.sum
-            .github/.cache/buster-for-binary
+            tests/go.sum
 
       - name: Set Go module cache
         run: |
@@ -299,7 +301,9 @@ jobs:
         uses: goreleaser/goreleaser-action@e435ccd777264be153ace6237001ef4d979d3a7a # v6.4.0
         with:
           version: v2.12.7 # renovate: datasource=github-tags depName=goreleaser/goreleaser
-          args: ${{ (inputs.is_production_release && (inputs.dry_run == false || inputs.dry_run == null)) && 'release' || 'build --snapshot' }} --clean
+          # On PRs: build only amd64 for speed (tests run on amd64 runners)
+          # On main/release: build both amd64 and arm64
+          args: ${{ (inputs.is_production_release && (inputs.dry_run == false || inputs.dry_run == null)) && 'release' || (github.event_name == 'pull_request' && 'build --single-target --snapshot' || 'build --snapshot') }} --clean
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           GOPATH: ${{ needs.vars.outputs.go_path }}
@@ -408,7 +412,9 @@ jobs:
       fail-fast: false
       matrix:
         image: [ngf, nginx]
-        platforms: ["linux/arm64, linux/amd64"]
+        # On PRs: build only amd64 for speed (tests run on amd64)
+        # On main/release: build both amd64 and arm64
+        platforms: ${{ github.event_name == 'pull_request' && fromJSON('["linux/amd64"]') || fromJSON('["linux/arm64, linux/amd64"]') }}
         # On PRs: only standard OS (2 jobs)
         # On main/release: include ubi (4 jobs)
         build-os: ${{ github.event_name == 'pull_request' && fromJSON('[""]') || fromJSON('["", "ubi"]') }}
@@ -439,7 +445,9 @@ jobs:
         build-os: ${{ github.event_name == 'pull_request' && fromJSON('[""]') || fromJSON('["", "ubi"]') }}
     with:
       image: plus
-      platforms: "linux/arm64, linux/amd64"
+      # On PRs: build only amd64 for speed (tests run on amd64)
+      # On main/release: build both amd64 and arm64
+      platforms: ${{ github.event_name == 'pull_request' && 'linux/amd64' || 'linux/arm64, linux/amd64' }}
       build-os: ${{ matrix.build-os }}
       tag: ${{ inputs.release_version || '' }}
       dry_run: ${{ inputs.dry_run || false }}
@@ -457,7 +465,9 @@ jobs:
     uses: ./.github/workflows/build.yml
     with:
       image: operator
-      platforms: "linux/arm64, linux/amd64"
+      # On PRs: build only amd64 for speed (tests run on amd64)
+      # On main/release: build both amd64 and arm64
+      platforms: ${{ github.event_name == 'pull_request' && 'linux/amd64' || 'linux/arm64, linux/amd64' }}
       tag: ${{ inputs.operator_version || '' }}
       dry_run: ${{ inputs.dry_run || false }}
       runner: ${{ github.repository_owner == 'nginx' && (inputs.is_production_release || ((github.event_name == 'push' || github.event_name == 'schedule') && (github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/heads/release-')))) && 'ubuntu-24.04-amd64' || 'ubuntu-24.04' }}
@@ -591,7 +601,7 @@ jobs:
           go-version: stable
           cache-dependency-path: |
             go.sum
-            .github/.cache/buster-for-unit-tests
+            tests/go.sum
 
       - name: Deploy Kubernetes
         id: k8s

.github/.cache/buster-for-generate

@@ -45,6 +45,9 @@ jobs:
         uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
         with:
           go-version: stable
+          cache-dependency-path: |
+            go.sum
+            tests/go.sum
 
       - name: Lint Go
         uses: golangci/golangci-lint-action@4afd733a84b1f43292c63897423277bb7f4313a9 # v8.0.0
@@ -63,6 +66,8 @@ jobs:
         uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6.0.0
         with:
           node-version-file: .nvmrc
+          cache: 'npm'
+          cache-dependency-path: internal/controller/nginx/modules/package-lock.json
 
       - name: Run Prettier on NJS code
         id: prettier-run

.github/.cache/buster-for-unit-tests

@@ -66,7 +66,7 @@ jobs:
           go-version: stable
           cache-dependency-path: |
             go.sum
-            .github/.cache/buster-for-generate
+            tests/go.sum
 
       # go mod tidy can be removed once https://github.com/renovatebot/renovate/issues/12999 is implemented
       - name: Update files for renovate