ci: avoid using default caching feature of actions/setup-go

`actions/setup-go` configures the cache under the assumption that a single module will be built with one setup.

Signed-off-by: Norio Nomura <[email protected]>

.github/actions/setup_cache_for_go/action.yml

@@ -0,0 +1,47 @@
+name: setup cache for go
+description: setup cache for go. export GOMODCACHE environment variable
+inputs:
+  go-version:
+    description: go version
+    required: true
+  runs-on:
+    description: runs on
+    required: true
+  working-directory:
+    description: working directory
+    default: '.'
+runs:
+  using: "composite"
+  steps:
+  - name: Set GOMODCACHE environment variable
+    run: echo "GOMODCACHE=$(pwd)/.gomodcache" >> $GITHUB_ENV
+    shell: bash
+  - id: go-env
+    run: |
+      echo "GOCACHE=$(go env GOCACHE)" >> $GITHUB_OUTPUT
+      echo "GOMOD=$(go env GOMOD)" >> $GITHUB_OUTPUT
+      echo "GOSUM=$(realpath go.sum)" >> $GITHUB_OUTPUT
+    shell: bash
+    working-directory: ${{ inputs.working-directory }}
+  - name: Cache go modules
+    uses: actions/cache@v4
+    with:
+      path: .gomodcache
+      key: go-modcache-${{ inputs.working-directory }}-${{ inputs.go-version }}-${{ hashFiles(steps.go-env.outputs.GOMOD) }}
+      restore-keys: |
+        go-modcache-${{ inputs.working-directory }}-${{ inputs.go-version }}-
+        go-modcache-${{ inputs.working-directory }}-
+      enableCrossOsArchive: true
+  - name: Cache go build cache
+    uses: actions/cache@v4
+    with:
+      path: ${{ steps.go-env.outputs.GOCACHE }}
+      key: go-cache-${{ inputs.working-directory }}-${{ inputs.runs-on }}-${{ inputs.go-version }}-${{ hashFiles(steps.go-env.outputs.GOSUM) }}
+      restore-keys: |
+        go-cache-${{ inputs.working-directory }}-${{ inputs.runs-on }}-${{ inputs.go-version }}-
+        go-cache-${{ inputs.working-directory }}-${{ inputs.runs-on }}-
+        go-cache-${{ inputs.working-directory }}-
+  - name: Download dependencies
+    run: go mod download -x
+    shell: bash
+    working-directory: ${{ inputs.working-directory }}

.github/workflows/build.yml

@@ -29,9 +29,15 @@ jobs:
     - uses: actions/checkout@v4
       with:
         fetch-depth: 0
-    - uses: actions/setup-go@v5
+    - id: setup-go
+      uses: actions/setup-go@v5
       with:
+        cache: false
         go-version: ${{ inputs.go-version }}
+    - uses: ./.github/actions/setup_cache_for_go
+      with:
+        go-version: ${{ steps.setup-go.outputs.go-version }}
+        runs-on: ${{ inputs.runs-on }}
     - name: Make
       run: make
     - name: Make install on Linux

.github/workflows/test.yml

@@ -81,9 +81,15 @@ jobs:
     - uses: actions/checkout@v4
       with:
         fetch-depth: 1
-    - uses: actions/setup-go@v5
+    - id: setup-go
+      uses: actions/setup-go@v5
       with:
+        cache: false
         go-version: ${{ matrix.go-version }}
+    - uses: ./.github/actions/setup_cache_for_go
+      with:
+        go-version: ${{ steps.setup-go.outputs.go-version }}
+        runs-on: ubuntu-24.04
     - name: Unit tests
       run: go test -v ./...
     - name: Make
@@ -161,9 +167,15 @@ jobs:
     - uses: actions/checkout@v4
       with:
         fetch-depth: 1
-    - uses: actions/setup-go@v5
+    - id: setup-go
+      uses: actions/setup-go@v5
       with:
+        cache: false
         go-version: 1.23.x
+    - uses: ./.github/actions/setup_cache_for_go
+      with:
+        go-version: ${{ steps.setup-go.outputs.go-version }}
+        runs-on: macos-12
     - name: Unit tests
       run: go test -v ./...
     - name: Make
@@ -287,23 +299,34 @@ jobs:
         # fetch-depth is set to 0 to let `limactl --version` print semver-ish version
         fetch-depth: 0
         ref: ${{ github.event.pull_request.head.sha }}
-    - uses: actions/setup-go@v5
-      with:
-        go-version: 1.23.x
     - uses: actions/cache@v4
       with:
         path: ~/.cache/lima/download
         key: ${{ runner.os }}-colima-${{ matrix.colima-version }}
     - uses: ./.github/actions/install_lima_from_artifact
       with:
         artifact: ${{ needs.build-on-ubuntu.outputs.artifact }}
+    - name: Checkout colima
+      uses: actions/checkout@v4
+      with:
+        repository: abiosoft/colima
+        ref: ${{ matrix.colima-version }}
+        path: colima
+    - id: setup-go
+      uses: actions/setup-go@v5
+      with:
+        cache: false
+        go-version: 1.23.x
+    - uses: ./.github/actions/setup_cache_for_go
+      with:
+        go-version: ${{ steps.setup-go.outputs.go-version }}
+        runs-on: macos-12
+        working-directory: ./colima
     - name: Install colima
       run: |
-        git clone https://github.com/abiosoft/colima
-        cd colima
-        git checkout ${{ matrix.colima-version }}
         make
         sudo make install
+      working-directory: ./colima
     - name: Install test dependencies
       run: |
         sudo apt-get update
@@ -382,9 +405,15 @@ jobs:
     - uses: actions/checkout@v4
       with:
         fetch-depth: 0
-    - uses: actions/setup-go@v5
+    - id: setup-go
+      uses: actions/setup-go@v5
       with:
+        cache: false
         go-version: 1.23.x
+    - uses: ./.github/actions/setup_cache_for_go
+      with:
+        go-version: ${{ steps.setup-go.outputs.go-version }}
+        runs-on: macos-12
     - name: Cache image used by ${{ matrix.oldver }}/examples/ubuntu-lts.yaml
       uses: ./.github/actions/setup_cache_for_template
       with: