Initial commit

2025-11-30 09:04:14 +08:00
commit 70c36b5eff
248 changed files with 47482 additions and 0 deletions
--- a/skills/cli-patterns/templates/flags-demo.go
+++ b/skills/cli-patterns/templates/flags-demo.go
@@ -0,0 +1,172 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"time"
+
+	"github.com/urfave/cli/v2"
+)
+
+func main() {
+	app := &cli.App{
+		Name:  "flags-demo",
+		Usage: "Demonstration of all flag types in urfave/cli",
+		Flags: []cli.Flag{
+			// String flag
+			&cli.StringFlag{
+				Name:    "name",
+				Aliases: []string{"n"},
+				Value:   "World",
+				Usage:   "Name to greet",
+				EnvVars: []string{"GREETING_NAME"},
+			},
+
+			// Int flag
+			&cli.IntFlag{
+				Name:    "count",
+				Aliases: []string{"c"},
+				Value:   1,
+				Usage:   "Number of times to repeat",
+				EnvVars: []string{"REPEAT_COUNT"},
+			},
+
+			// Bool flag
+			&cli.BoolFlag{
+				Name:    "verbose",
+				Aliases: []string{"v"},
+				Usage:   "Enable verbose output",
+				EnvVars: []string{"VERBOSE"},
+			},
+
+			// Int64 flag
+			&cli.Int64Flag{
+				Name:  "size",
+				Value: 1024,
+				Usage: "Size in bytes",
+			},
+
+			// Uint flag
+			&cli.UintFlag{
+				Name:  "port",
+				Value: 8080,
+				Usage: "Port number",
+			},
+
+			// Float64 flag
+			&cli.Float64Flag{
+				Name:  "timeout",
+				Value: 30.0,
+				Usage: "Timeout in seconds",
+			},
+
+			// Duration flag
+			&cli.DurationFlag{
+				Name:  "wait",
+				Value: 10 * time.Second,
+				Usage: "Wait duration",
+			},
+
+			// StringSlice flag (multiple values)
+			&cli.StringSliceFlag{
+				Name:    "tag",
+				Aliases: []string{"t"},
+				Usage:   "Tags (can be specified multiple times)",
+			},
+
+			// IntSlice flag (multiple int values)
+			&cli.IntSliceFlag{
+				Name:  "priority",
+				Usage: "Priority values",
+			},
+
+			// Required flag
+			&cli.StringFlag{
+				Name:     "token",
+				Usage:    "API token (required)",
+				Required: true,
+				EnvVars:  []string{"API_TOKEN"},
+			},
+
+			// Flag with default from env
+			&cli.StringFlag{
+				Name:    "env",
+				Aliases: []string{"e"},
+				Value:   "development",
+				Usage:   "Environment name",
+				EnvVars: []string{"ENV", "ENVIRONMENT"},
+			},
+
+			// Hidden flag (not shown in help)
+			&cli.StringFlag{
+				Name:   "secret",
+				Usage:  "Secret value",
+				Hidden: true,
+			},
+		},
+		Action: func(c *cli.Context) error {
+			// String flag
+			name := c.String("name")
+			fmt.Printf("Name: %s\n", name)
+
+			// Int flag
+			count := c.Int("count")
+			fmt.Printf("Count: %d\n", count)
+
+			// Bool flag
+			verbose := c.Bool("verbose")
+			if verbose {
+				fmt.Println("Verbose mode: enabled")
+			}
+
+			// Int64 flag
+			size := c.Int64("size")
+			fmt.Printf("Size: %d bytes\n", size)
+
+			// Uint flag
+			port := c.Uint("port")
+			fmt.Printf("Port: %d\n", port)
+
+			// Float64 flag
+			timeout := c.Float64("timeout")
+			fmt.Printf("Timeout: %.2f seconds\n", timeout)
+
+			// Duration flag
+			wait := c.Duration("wait")
+			fmt.Printf("Wait: %s\n", wait)
+
+			// StringSlice flag
+			tags := c.StringSlice("tag")
+			if len(tags) > 0 {
+				fmt.Printf("Tags: %v\n", tags)
+			}
+
+			// IntSlice flag
+			priorities := c.IntSlice("priority")
+			if len(priorities) > 0 {
+				fmt.Printf("Priorities: %v\n", priorities)
+			}
+
+			// Required flag
+			token := c.String("token")
+			fmt.Printf("Token: %s\n", token)
+
+			// Environment flag
+			env := c.String("env")
+			fmt.Printf("Environment: %s\n", env)
+
+			// Greeting logic
+			fmt.Println("\n---")
+			for i := 0; i < count; i++ {
+				fmt.Printf("Hello, %s!\n", name)
+			}
+
+			return nil
+		},
+	}
+
+	if err := app.Run(os.Args); err != nil {
+		log.Fatal(err)
+	}
+}