feat(cli): add --output={text,json} to version cmd (#7010)

* feat(cliui): add TextFormat
* feat(cli): add --format={text,json} to version cmd

cli/version_test.go

@@ -0,0 +1,66 @@
+package cli_test
+
+import (
+	"bytes"
+	"context"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/coder/coder/cli/clitest"
+	"github.com/coder/coder/testutil"
+)
+
+func TestVersion(t *testing.T) {
+	t.Parallel()
+	expectedText := `Coder v0.0.0-devel
+https://github.com/coder/coder
+
+Full build of Coder, supports the  server  subcommand.
+`
+	expectedJSON := `{
+  "version": "v0.0.0-devel",
+  "build_time": "0001-01-01T00:00:00Z",
+  "external_url": "https://github.com/coder/coder",
+  "slim": false,
+  "agpl": false
+}
+`
+	for _, tt := range []struct {
+		Name     string
+		Args     []string
+		Expected string
+	}{
+		{
+			Name:     "Defaults to human-readable output",
+			Args:     []string{"version"},
+			Expected: expectedText,
+		},
+		{
+			Name:     "JSON output",
+			Args:     []string{"version", "--output=json"},
+			Expected: expectedJSON,
+		},
+		{
+			Name:     "Text output",
+			Args:     []string{"version", "--output=text"},
+			Expected: expectedText,
+		},
+	} {
+		tt := tt
+		t.Run(tt.Name, func(t *testing.T) {
+			t.Parallel()
+			ctx, cancel := context.WithTimeout(context.Background(), testutil.WaitShort)
+			t.Cleanup(cancel)
+			inv, _ := clitest.New(t, tt.Args...)
+			buf := new(bytes.Buffer)
+			inv.Stdout = buf
+			err := inv.WithContext(ctx).Run()
+			require.NoError(t, err)
+			actual := buf.String()
+			actual = strings.ReplaceAll(actual, "\r\n", "\n")
+			require.Equal(t, tt.Expected, actual)
+		})
+	}
+}