chore: Define golang version in a single file

Author: mrueg

.github/workflows/ci.yml

@@ -20,7 +20,6 @@ env:
   E2E_SETUP_KIND: yes
   E2E_SETUP_KUBECTL: yes
   SUDO: sudo
-  GO_VERSION: "1.25.6"
   GOLANGCI_LINT_VERSION: "v2.8.0"
 
 jobs:
@@ -34,7 +33,7 @@ jobs:
     - name: Set up Go 1.x
       uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6.1.0
       with:
-        go-version: ${{ env.GO_VERSION }}
+        go-version-file: '.go-version'
       id: go
 
     - name: Lint
@@ -52,7 +51,7 @@ jobs:
     - name: Set up Go 1.x
       uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6.1.0
       with:
-        go-version: ${{ env.GO_VERSION }}
+        go-version-file: '.go-version'
       id: go
 
     - name: Validate generated manifests
@@ -69,7 +68,7 @@ jobs:
     - name: Set up Go 1.x
       uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6.1.0
       with:
-        go-version: ${{ env.GO_VERSION }}
+        go-version-file: '.go-version'
       id: go
 
     - name: Validate go modules
@@ -86,7 +85,7 @@ jobs:
     - name: Set up Go 1.x
       uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6.1.0
       with:
-        go-version: ${{ env.GO_VERSION }}
+        go-version-file: '.go-version'
       id: go
 
     - name: Check that all metrics are documented and templates have no delta
@@ -103,7 +102,7 @@ jobs:
     - name: Set up Go 1.x
       uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6.1.0
       with:
-        go-version: ${{ env.GO_VERSION }}
+        go-version-file: '.go-version'
       id: go
 
     - name: Unit tests
@@ -135,7 +134,7 @@ jobs:
     - name: Set up Go 1.x
       uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6.1.0
       with:
-        go-version: ${{ env.GO_VERSION }}
+        go-version-file: '.go-version'
       id: go
 
     - name: Benchmark tests
@@ -163,7 +162,7 @@ jobs:
     - name: Set up Go 1.x
       uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6.1.0
       with:
-        go-version: ${{ env.GO_VERSION }}
+        go-version-file: '.go-version'
       id: go
 
     - name: Benchmark tests
@@ -191,7 +190,7 @@ jobs:
     - name: Set up Go 1.x
       uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6.1.0
       with:
-        go-version: ${{ env.GO_VERSION }}
+        go-version-file: '.go-version'
       id: go
 
     - name: Build
@@ -208,7 +207,7 @@ jobs:
     - name: Set up Go 1.x
       uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6.1.0
       with:
-        go-version: ${{ env.GO_VERSION }}
+        go-version-file: '.go-version'
       id: go
 
     - name: End-to-end tests

.github/workflows/govulncheck.yml

@@ -5,9 +5,6 @@ on:
     # Run every Monday
     - cron: '0 0 * * 1'
 
-env:
-  GO_VERSION: "^1.24"
-
 permissions:
   contents: read
 
@@ -20,7 +17,7 @@ jobs:
       - name: Set up Go 1.x
         uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6.1.0
         with:
-          go-version: ${{ env.GO_VERSION }}
+          go-version-file: '.go-version'
       - name: Install govulncheck binary
         run: |
           go install golang.org/x/vuln/cmd/govulncheck@latest

.github/workflows/pre-release.yml

@@ -14,14 +14,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout (full history)
-        uses: actions/checkout@v6
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
         with:
           fetch-depth: 0
       - name: Extract versions
         id: versions
         run: |
           # Extract Go version from Dockerfile
-          GO_VERSION=$(grep '^ARG GOVERSION=' Dockerfile | cut -d'=' -f2)
+          GO_VERSION=$(cat .go-version)
           echo "go-version=${GO_VERSION}" >> $GITHUB_OUTPUT
           
           # Extract k8s.io/client-go version from go.mod
@@ -31,12 +31,12 @@ jobs:
           echo "📦 Go version: ${GO_VERSION}"
           echo "📦 k8s.io/client-go version: ${CLIENT_GO_VERSION}"  
       - name: Set up Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6.1.0
         with:
-          go-version: ${{ steps.versions.outputs.go-version }}
+          go-version-file: '.go-version'
         id: go
       - name: Make pre-release
-        uses: goreleaser/goreleaser-action@v6
+        uses: goreleaser/goreleaser-action@e435ccd777264be153ace6237001ef4d979d3a7a # v6.4.0
         with:
           version: latest
           args: release --clean

.go-version

@@ -0,0 +1 @@
+1.25.6

Makefile

@@ -14,7 +14,7 @@ OS ?= $(shell uname -s | tr A-Z a-z)
 ALL_ARCH = amd64 arm arm64 ppc64le s390x
 PKG = github.com/prometheus/common
 PROMETHEUS_VERSION = 3.9.1
-GO_VERSION = 1.25.5
+GO_VERSION = $(shell cat .go-version)
 IMAGE = $(REGISTRY)/kube-state-metrics
 MULTI_ARCH_IMG = $(IMAGE)-$(ARCH)
 USER ?= $(shell id -u -n)