[teamai] Push 87 resource(s) from XingfenD

.teamai/skills/common/golang-cli/assets/examples/output.go

@@ -0,0 +1,75 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"text/tabwriter"
+
+	"github.com/fatih/color"
+	"github.com/spf13/cobra"
+)
+
+// === stdout vs stderr ===
+// stdout: Program output (data, results). This is what gets piped.
+// stderr: Logs, progress, errors, diagnostics. Not piped by default.
+
+func outputExample(cmd *cobra.Command, result string, err error) {
+	// Output data to stdout (pipeable)
+	fmt.Fprintln(cmd.OutOrStdout(), result)
+
+	// Logs and errors to stderr (use slog)
+	// slog.Error("operation failed", "error", err)
+}
+
+// === Detecting Pipe vs Terminal ===
+
+func isTerminal() bool {
+	fi, err := os.Stdout.Stat()
+	if err != nil {
+		return false
+	}
+	return fi.Mode()&os.ModeCharDevice != 0
+}
+
+// === Machine-Readable Output ===
+// Support --output flag for different output formats.
+
+type User struct {
+	ID   string
+	Name string
+}
+
+func printUsers(cmd *cobra.Command, users []User) error {
+	format, _ := cmd.Flags().GetString("output")
+	switch format {
+	case "json":
+		enc := json.NewEncoder(cmd.OutOrStdout())
+		enc.SetIndent("", "  ")
+		return enc.Encode(users)
+	case "plain":
+		for _, u := range users {
+			fmt.Fprintf(cmd.OutOrStdout(), "%s\t%s\n", u.ID, u.Name)
+		}
+	default: // "table"
+		w := tabwriter.NewWriter(cmd.OutOrStdout(), 0, 0, 2, ' ', 0)
+		fmt.Fprintln(w, "ID\tNAME")
+		for _, u := range users {
+			fmt.Fprintf(w, "%s\t%s\n", u.ID, u.Name)
+		}
+		w.Flush()
+	}
+	return nil
+}
+
+// === Colors ===
+// Use fatih/color — it auto-disables when output is not a terminal.
+
+func colorExamples(cmd *cobra.Command, env string, err error) {
+	color.Green("Success: deployed to %s", env)
+	color.Red("Error: %v", err)
+
+	// Or for reusable styles
+	success := color.New(color.FgGreen, color.Bold).SprintFunc()
+	fmt.Fprintf(cmd.OutOrStdout(), "%s deployed\n", success("v1.2.3"))
+}