Implement to generate configuration for postfix/dovecot #6

cmd/mailfull/command/genconfig.go

@@ -0,0 +1,67 @@
+package command
+
+import (
+	"fmt"
+
+	"github.com/directorz/mailfull-go"
+)
+
+// GenConfigCommand represents a GenConfigCommand.
+type GenConfigCommand struct {
+	Meta
+}
+
+// Synopsis returns a one-line synopsis.
+func (c *GenConfigCommand) Synopsis() string {
+	return "Write a Postfix or Dovecot configuration to stdout."
+}
+
+// Help returns long-form help text.
+func (c *GenConfigCommand) Help() string {
+	txt := fmt.Sprintf(`
+Usage:
+    %s %s name
+
+Description:
+    %s
+
+Required Args:
+    name
+        The software name that you want to generate a configuration.
+        Available names are "postfix" and "dovecot".
+`,
+		c.CmdName, c.SubCmdName,
+		c.Synopsis())
+
+	return txt[1:]
+}
+
+// Run runs the command and returns the exit status.
+func (c *GenConfigCommand) Run(args []string) int {
+	if len(args) != 1 {
+		fmt.Fprintf(c.UI.ErrorWriter, "%v\n", c.Help())
+		return 1
+	}
+
+	softwareName := args[0]
+
+	repo, err := mailfull.OpenRepository(".")
+	if err != nil {
+		fmt.Fprintf(c.UI.ErrorWriter, "[ERR] %v\n", err)
+		return 1
+	}
+
+	switch softwareName {
+	case "postfix":
+		fmt.Fprintf(c.UI.Writer, "%s", repo.GenerateConfigPostfix())
+
+	case "dovecot":
+		fmt.Fprintf(c.UI.Writer, "%s", repo.GenerateConfigDovecot())
+
+	default:
+		fmt.Fprintf(c.UI.ErrorWriter, "[ERR] Specify \"postfix\" or \"dovecot\".\n")
+		return 1
+	}
+
+	return 0
+}