Check if repos root exists and is not empty before opening repos

pkg/list.go

@@ -3,6 +3,7 @@ package pkg
 import (
 	"errors"
 	"fmt"
+	"os"
 	"path/filepath"
 	"sort"
 	"strings"
@@ -21,8 +22,14 @@ var skipNode = errors.New(".git directory found, skipping this node")
 var repos []string
 
 func FindRepos() ([]string, error) {
+	repos = []string{}
+
 	root := Cfg.ReposRoot()
 
+	if _, err := os.Stat(root); err != nil {
+		return nil, fmt.Errorf("Repos root %s does not exist or can't be accessed", root)
+	}
+
 	walkOpts := &godirwalk.Options{
 		ErrorCallback: ErrorCb,
 		Callback:      WalkCb,
@@ -35,6 +42,10 @@ func FindRepos() ([]string, error) {
 		return nil, err
 	}
 
+	if len(repos) == 0 {
+		return nil, fmt.Errorf("No git repos found in repos root %s", root)
+	}
+
 	return repos, nil
 }