Add runtime version reporting

cmd/releasekit/main.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"os"
+
+	"gitea.maximumdirect.net/eric/ReleaseKit/buildinfo"
+)
+
+func main() {
+	os.Exit(run(os.Args[1:], os.Stdout, os.Stderr))
+}
+
+func run(args []string, stdout, stderr io.Writer) int {
+	if len(args) == 1 && args[0] == "version" {
+		fmt.Fprintf(stdout, "releasekit %s\n", buildinfo.Version())
+		return 0
+	}
+
+	fmt.Fprintln(stderr, "usage: releasekit version")
+	return 2
+}

cmd/releasekit/main_test.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"testing"
+
+	"gitea.maximumdirect.net/eric/ReleaseKit/buildinfo"
+)
+
+func TestVersionCommand(t *testing.T) {
+	var stdout, stderr bytes.Buffer
+	if status := run([]string{"version"}, &stdout, &stderr); status != 0 {
+		t.Fatalf("run() status = %d, want 0; stderr = %q", status, stderr.String())
+	}
+	if want := fmt.Sprintf("releasekit %s\n", buildinfo.Version()); stdout.String() != want {
+		t.Fatalf("version output = %q, want %q", stdout.String(), want)
+	}
+	if stderr.Len() != 0 {
+		t.Fatalf("version command wrote to stderr: %q", stderr.String())
+	}
+}
+
+func TestUnknownCommand(t *testing.T) {
+	var stdout, stderr bytes.Buffer
+	if status := run([]string{"publish"}, &stdout, &stderr); status != 2 {
+		t.Fatalf("run() status = %d, want 2", status)
+	}
+	if stdout.Len() != 0 {
+		t.Fatalf("unknown command wrote to stdout: %q", stdout.String())
+	}
+	if want := "usage: releasekit version\n"; stderr.String() != want {
+		t.Fatalf("usage output = %q, want %q", stderr.String(), want)
+	}
+}