Display buildkit and runc version in nerdctl

Fixes#1082

Co-authored-by: Akihiro Suda <suda.kyoto@gmail.com>

Signed-off-by: Manu Gupta <manugupt1@gmail.com>

cmd/nerdctl/version.go

@@ -74,6 +74,13 @@ func versionAction(cmd *cobra.Command, args []string) error {
 		fmt.Fprintf(w, " Version:\t%s\n", v.Client.Version)
 		fmt.Fprintf(w, " OS/Arch:\t%s/%s\n", v.Client.Os, v.Client.Arch)
 		fmt.Fprintf(w, " Git commit:\t%s\n", v.Client.GitCommit)
+		for _, compo := range v.Client.Components {
+			fmt.Fprintf(w, " %s:\n", compo.Name)
+			fmt.Fprintf(w, "  Version:\t%s\n", compo.Version)
+			for detailK, detailV := range compo.Details {
+				fmt.Fprintf(w, "  %s:\t%s\n", detailK, detailV)
+			}
+		}
 		if v.Server != nil {
 			fmt.Fprintf(w, "\n")
 			fmt.Fprintf(w, "Server:\n")

pkg/infoutil/infoutil.go

@@ -20,6 +20,7 @@ import (
 	"context"
 	"fmt"
 	"os"
+	"os/exec"
 	"runtime"
 	"strings"
 	"time"
@@ -28,10 +29,12 @@ import (
 	"github.com/containerd/containerd"
 	ptypes "github.com/containerd/containerd/protobuf/types"
 	"github.com/containerd/containerd/services/introspection"
+	"github.com/containerd/nerdctl/pkg/buildkitutil"
 	"github.com/containerd/nerdctl/pkg/inspecttypes/dockercompat"
 	"github.com/containerd/nerdctl/pkg/inspecttypes/native"
 	"github.com/containerd/nerdctl/pkg/logging"
 	"github.com/containerd/nerdctl/pkg/version"
+	"github.com/sirupsen/logrus"
 )
 
 func NativeDaemonInfo(ctx context.Context, client *containerd.Client) (*native.DaemonInfo, error) {
@@ -117,6 +120,9 @@ func ClientVersion() dockercompat.ClientVersion {
 		GoVersion: runtime.Version(),
 		Os:        runtime.GOOS,
 		Arch:      runtime.GOARCH,
+		Components: []dockercompat.ComponentVersion{
+			buildctlVersion(),
+		},
 	}
 }
 
@@ -133,8 +139,8 @@ func ServerVersion(ctx context.Context, client *containerd.Client) (*dockercompa
 				Version: daemonVersion.Version,
 				Details: map[string]string{"GitCommit": daemonVersion.Revision},
 			},
+			runcVersion(),
 		},
-		// TODO: add runc version
 	}
 	return v, nil
 }
@@ -151,6 +157,64 @@ func ServerSemVer(ctx context.Context, client *containerd.Client) (*semver.Versi
 	return sv, nil
 }
 
+func buildctlVersion() dockercompat.ComponentVersion {
+	buildctlBinary, err := buildkitutil.BuildctlBinary()
+	if err != nil {
+		logrus.Warnf("unable to determine buildctl version: %s", err.Error())
+		return dockercompat.ComponentVersion{Name: "buildctl"}
+	}
+
+	stdout, err := exec.Command(buildctlBinary, "--version").Output()
+	if err != nil {
+		logrus.Warnf("unable to determine buildctl version: %s", err.Error())
+		return dockercompat.ComponentVersion{Name: "buildkit"}
+	}
+
+	versionStr := strings.Fields(strings.TrimSpace(string(stdout)))
+	if len(versionStr) != 4 {
+		logrus.Errorf("unable to determine buildctl version got: %s", versionStr)
+		return dockercompat.ComponentVersion{Name: "buildkit"}
+	}
+
+	return dockercompat.ComponentVersion{
+		Name:    "buildctl",
+		Version: versionStr[2],
+		Details: map[string]string{"GitCommit": versionStr[3]},
+	}
+}
+
+func runcVersion() dockercompat.ComponentVersion {
+	stdout, err := exec.Command("runc", "--version").Output()
+	if err != nil {
+		logrus.Warnf("unable to determine runc version: %s", err.Error())
+		return dockercompat.ComponentVersion{Name: "runc"}
+	}
+
+	var versionList = strings.Split(strings.TrimSpace(string(stdout)), "\n")
+	firstLine := strings.Fields(versionList[0])
+	if len(firstLine) != 3 {
+		logrus.Errorf("unable to determine runc version, got: %s", firstLine)
+		return dockercompat.ComponentVersion{Name: "runc"}
+	}
+	version := firstLine[2]
+
+	details := map[string]string{}
+	for _, detailsLine := range versionList[1:] {
+		detail := strings.Split(detailsLine, ": ")
+		if len(detail) != 2 {
+			logrus.Warnf("unable to determine one of runc details, got: %s, %d", detail, len(detail))
+			continue
+		}
+		details[detail[0]] = detail[1]
+	}
+
+	return dockercompat.ComponentVersion{
+		Name:    "runc",
+		Version: version,
+		Details: details,
+	}
+}
+
 //BlockIOWeight return whether Block IO weight is supported or not
 func BlockIOWeight(cgroupManager string) bool {
 	var info *dockercompat.Info

pkg/inspecttypes/dockercompat/info.go

@@ -76,11 +76,12 @@ type VersionInfo struct {
 
 // ClientVersion is from https://github.com/docker/cli/blob/v20.10.8/cli/command/system/version.go#L74-L87
 type ClientVersion struct {
-	Version   string
-	GitCommit string
-	GoVersion string
-	Os        string // GOOS
-	Arch      string // GOARCH
+	Version    string
+	GitCommit  string
+	GoVersion  string
+	Os         string             // GOOS
+	Arch       string             // GOARCH
+	Components []ComponentVersion // nerdctl extension
 }
 
 // ComponentVersion describes the version information for a specific component.