template for easier plugin

libplugin/template.go

@@ -0,0 +1,53 @@
+package libplugin
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/urfave/cli/v2"
+)
+
+type PluginTemplate struct {
+	Name         string
+	Usage        string
+	Flags        []cli.Flag
+	CreateConfig func(c *cli.Context) (*SshPiperPluginConfig, error)
+}
+
+func CreateAndRunPluginTemplate(t *PluginTemplate) {
+	app := &cli.App{
+		Name:            t.Name,
+		Usage:           t.Usage,
+		Flags:           t.Flags,
+		HideHelpCommand: true,
+		HideHelp:        true,
+		Writer:          os.Stderr,
+		ErrWriter:       os.Stderr,
+		Action: func(c *cli.Context) error {
+			if t == nil {
+				return fmt.Errorf("plugin template is nil")
+			}
+
+			if t.CreateConfig == nil {
+				return fmt.Errorf("plugin template create config is nil")
+			}
+
+			config, err := t.CreateConfig(c)
+			if err != nil {
+				return err
+			}
+
+			p, err := NewFromStdio(*config)
+			if err != nil {
+				return err
+			}
+
+			ConfigStdioLogrus(p, nil)
+			return p.Serve()
+		},
+	}
+
+	if err := app.Run(os.Args); err != nil {
+		fmt.Fprintf(os.Stderr, "cannot start plugin: %v\n", err)
+	}
+}