chore(loo-4749): version cmd

.goreleaser.yaml

@@ -17,6 +17,10 @@ builds:
       - linux
       - windows
       - darwin
+    ldflags:
+      - -s -w
+      - -X github.com/loops-so/cli/cmd.version={{.Version}}
+      - -X github.com/loops-so/cli/cmd.commit={{.ShortCommit}}
 
 archives:
   - formats: [tar.gz]

cmd/version.go

@@ -0,0 +1,36 @@
+package cmd
+
+import (
+	"fmt"
+	"io"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	version = "dev"
+	commit  = "none"
+)
+
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "Print version information",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		return runVersion(cmd.OutOrStdout())
+	},
+}
+
+func runVersion(w io.Writer) error {
+	if isJSONOutput() {
+		return printJSON(w, struct {
+			Version string `json:"version"`
+			Commit  string `json:"commit"`
+		}{version, commit})
+	}
+	fmt.Fprintf(w, "loops %s (commit: %s)\n", version, commit)
+	return nil
+}
+
+func init() {
+	rootCmd.AddCommand(versionCmd)
+}

cmd/version_test.go

@@ -0,0 +1,41 @@
+package cmd
+
+import (
+	"bytes"
+	"encoding/json"
+	"strings"
+	"testing"
+)
+
+func TestRunVersion_Text(t *testing.T) {
+	outputFormat = "text"
+	var buf bytes.Buffer
+	if err := runVersion(&buf); err != nil {
+		t.Fatal(err)
+	}
+	got := buf.String()
+	if !strings.HasPrefix(got, "loops ") {
+		t.Errorf("unexpected output: %q", got)
+	}
+}
+
+func TestRunVersion_JSON(t *testing.T) {
+	outputFormat = "json"
+	t.Cleanup(func() { outputFormat = "text" })
+
+	var buf bytes.Buffer
+	if err := runVersion(&buf); err != nil {
+		t.Fatal(err)
+	}
+
+	var got struct {
+		Version string `json:"version"`
+		Commit  string `json:"commit"`
+	}
+	if err := json.Unmarshal(buf.Bytes(), &got); err != nil {
+		t.Fatalf("invalid JSON: %v", err)
+	}
+	if got.Version == "" {
+		t.Error("version field is empty")
+	}
+}