Add config file, handle it with Viper, add a command to open it in an editor

commands/config.go

@@ -0,0 +1,48 @@
+package commands
+
+import (
+	"log"
+	"os"
+	"os/exec"
+	"path"
+	"syscall"
+
+	"github.com/khlieng/name_pending/Godeps/_workspace/src/github.com/spf13/cobra"
+
+	"github.com/khlieng/name_pending/storage"
+)
+
+var (
+	editors = []string{"nano", "notepad", "vi", "emacs"}
+
+	configCmd = &cobra.Command{
+		Use:   "config",
+		Short: "Edit config file",
+		Run: func(cmd *cobra.Command, _ []string) {
+			if editor := findEditor(); editor != "" {
+				args := []string{editor, path.Join(storage.AppDir, "config.toml")}
+				syscall.Exec(editor, args, os.Environ())
+			} else {
+				log.Println("Unable to locate editor")
+			}
+		},
+	}
+)
+
+func findEditor() string {
+	if editor := os.Getenv("EDITOR"); editor != "" {
+		editor, err := exec.LookPath(editor)
+		if err == nil {
+			return editor
+		}
+	}
+
+	for _, editor := range editors {
+		editor, err := exec.LookPath(editor)
+		if err == nil {
+			return editor
+		}
+	}
+
+	return ""
+}