Merge pull request #31351 from gjenkins8/gjenkins/helm_version_kubeversion

feat: `helm version` print Kubernetes (client-go) version

Makefile

@@ -69,6 +69,8 @@ LDFLAGS += -X helm.sh/helm/v4/pkg/internal/v3/lint/rules.k8sVersionMajor=$(K8S_M
 LDFLAGS += -X helm.sh/helm/v4/pkg/internal/v3/lint/rules.k8sVersionMinor=$(K8S_MODULES_MINOR_VER)
 LDFLAGS += -X helm.sh/helm/v4/pkg/chart/common/util.k8sVersionMajor=$(K8S_MODULES_MAJOR_VER)
 LDFLAGS += -X helm.sh/helm/v4/pkg/chart/common/util.k8sVersionMinor=$(K8S_MODULES_MINOR_VER)
+LDFLAGS += -X helm.sh/helm/v4/internal/version.kubeClientVersionMajor=$(K8S_MODULES_MAJOR_VER)
+LDFLAGS += -X helm.sh/helm/v4/internal/version.kubeClientVersionMinor=$(K8S_MODULES_MINOR_VER)
 
 .PHONY: all
 all: build

internal/version/version.go

@@ -18,6 +18,7 @@ package version // import "helm.sh/helm/v4/internal/version"
 
 import (
 	"flag"
+	"fmt"
 	"runtime"
 	"strings"
 )
@@ -37,6 +38,11 @@ var (
 	gitCommit = ""
 	// gitTreeState is the state of the git tree
 	gitTreeState = ""
+
+	// The Kubernetes version can be set by LDFLAGS. In order to do that the value
+	// must be a string.
+	kubeClientVersionMajor = ""
+	kubeClientVersionMinor = ""
 )
 
 // BuildInfo describes the compile time information.
@@ -49,6 +55,8 @@ type BuildInfo struct {
 	GitTreeState string `json:"git_tree_state,omitempty"`
 	// GoVersion is the version of the Go compiler used.
 	GoVersion string `json:"go_version,omitempty"`
+	// KubeClientVersion is the version of client-go Helm was build with
+	KubeClientVersion string `json:"kube_client_version"`
 }
 
 // GetVersion returns the semver string of the version
@@ -71,6 +79,7 @@ func Get() BuildInfo {
 		GitCommit:         gitCommit,
 		GitTreeState:      gitTreeState,
 		GoVersion:         runtime.Version(),
+		KubeClientVersion: fmt.Sprintf("v%s.%s", kubeClientVersionMajor, kubeClientVersionMinor),
 	}
 
 	// HACK(bacongobbler): strip out GoVersion during a test run for consistent test output

pkg/cmd/testdata/output/version.txt

@@ -1 +1 @@
-version.BuildInfo{Version:"v4.0", GitCommit:"", GitTreeState:"", GoVersion:""}
+version.BuildInfo{Version:"v4.0", GitCommit:"", GitTreeState:"", GoVersion:"", KubeClientVersion:"v."}