Initial commit

skills/cli-patterns/templates/hooks-cli.go

@@ -0,0 +1,94 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/urfave/cli/v2"
+)
+
+func main() {
+	app := &cli.App{
+		Name:  "hooks-demo",
+		Usage: "Demonstration of Before/After hooks",
+
+		// Global Before hook - runs before any command
+		Before: func(c *cli.Context) error {
+			fmt.Println("🚀 [GLOBAL BEFORE] Initializing application...")
+			fmt.Println("   - Loading configuration")
+			fmt.Println("   - Setting up connections")
+			return nil
+		},
+
+		// Global After hook - runs after any command
+		After: func(c *cli.Context) error {
+			fmt.Println("✅ [GLOBAL AFTER] Cleaning up...")
+			fmt.Println("   - Closing connections")
+			fmt.Println("   - Saving state")
+			return nil
+		},
+
+		Commands: []*cli.Command{
+			{
+				Name:  "process",
+				Usage: "Process data with hooks",
+
+				// Command-specific Before hook
+				Before: func(c *cli.Context) error {
+					fmt.Println("  [COMMAND BEFORE] Preparing to process...")
+					fmt.Println("    - Validating input")
+					return nil
+				},
+
+				// Command action
+				Action: func(c *cli.Context) error {
+					fmt.Println("    [ACTION] Processing data...")
+					return nil
+				},
+
+				// Command-specific After hook
+				After: func(c *cli.Context) error {
+					fmt.Println("  [COMMAND AFTER] Processing complete!")
+					return nil
+				},
+			},
+
+			{
+				Name:  "validate",
+				Usage: "Validate configuration",
+
+				Before: func(c *cli.Context) error {
+					fmt.Println("  [COMMAND BEFORE] Starting validation...")
+					return nil
+				},
+
+				Action: func(c *cli.Context) error {
+					fmt.Println("    [ACTION] Validating...")
+					return nil
+				},
+
+				After: func(c *cli.Context) error {
+					fmt.Println("  [COMMAND AFTER] Validation complete!")
+					return nil
+				},
+			},
+		},
+	}
+
+	if err := app.Run(os.Args); err != nil {
+		log.Fatal(err)
+	}
+}
+
+// Example output when running "hooks-demo process":
+// 🚀 [GLOBAL BEFORE] Initializing application...
+//    - Loading configuration
+//    - Setting up connections
+//   [COMMAND BEFORE] Preparing to process...
+//     - Validating input
+//     [ACTION] Processing data...
+//   [COMMAND AFTER] Processing complete!
+// ✅ [GLOBAL AFTER] Cleaning up...
+//    - Closing connections
+//    - Saving state