Create the config file if doesn't exist

Fixes #2

Author: clns

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "vendor/github.com/xanzy/go-gitlab"]
 	path = vendor/github.com/xanzy/go-gitlab
 	url = https://github.com/xanzy/go-gitlab
+[submodule "vendor/github.com/mitchellh/go-homedir"]
+	path = vendor/github.com/mitchellh/go-homedir
+	url = https://github.com/mitchellh/go-homedir

cmd/root.go

@@ -16,6 +16,7 @@ var (
 	repo, repourl, token string
 	user, password       string
 	verbose              bool
+	configName           = ".gitlab-cli"
 )
 
 // RootCmd represents the base command when called without any subcommands
@@ -67,9 +68,9 @@ func initConfig() {
 		viper.SetConfigFile(cfgFile)
 	}
 
-	viper.SetConfigName(".gitlab-cli") // name of config file (without extension)
-	viper.AddConfigPath("$HOME")       // adding home directory as first search path
-	viper.AutomaticEnv()               // read in environment variables that match
+	viper.SetConfigName(configName) // name of config file (without extension)
+	viper.AddConfigPath("$HOME")    // adding home directory as first search path
+	viper.AutomaticEnv()            // read in environment variables that match
 	viper.ConfigFileUsed()
 
 	// If a config file is found, read it in.

cmd/viper.go

@@ -1,18 +1,26 @@
 package cmd
 
 import (
-	"os"
-
 	"fmt"
-
+	"os"
+	"path/filepath"
 	"strings"
 
+	"github.com/mitchellh/go-homedir"
 	"github.com/spf13/viper"
 	"gopkg.in/yaml.v2"
 )
 
 func SaveViperConfig() error {
-	f, err := os.Create(viper.ConfigFileUsed())
+	filename := viper.ConfigFileUsed()
+	if filename == "" {
+		hdir, err := homedir.Dir()
+		if err != nil {
+			return err
+		}
+		filename = filepath.Join(hdir, configName+".yml")
+	}
+	f, err := os.Create(filename)
 	if err != nil {
 		return err
 	}