-y/--yes flag for non-interactive mode (fixes #46)

Also makes Modrinth auto-accept search results with only 1 result, to be
consistent with CurseForge.

cmd/root.go

@@ -58,7 +58,7 @@ func init() {
 	defaultCacheDir, err := core.GetPackwizCache()
 	cacheUsage := "The directory where packwiz will cache downloaded mods"
 	if err == nil {
-		cacheUsage += "(default \""+defaultCacheDir+"\")"
+		cacheUsage += "(default \"" + defaultCacheDir + "\")"
 	}
 	rootCmd.PersistentFlags().String("cache", defaultCacheDir, cacheUsage)
 	_ = viper.BindPFlag("cache.directory", rootCmd.PersistentFlags().Lookup("cache"))
@@ -70,6 +70,10 @@ func init() {
 	}
 	file = filepath.Join(file, ".packwiz.toml")
 	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "The config file to use (default \""+file+"\")")
+
+	var nonInteractive bool
+	rootCmd.PersistentFlags().BoolVarP(&nonInteractive, "yes", "y", false, "Accept all prompts with the default or \"yes\" option (non-interactive mode) - may pick unwanted options in search results")
+	_ = viper.BindPFlag("non-interactive", rootCmd.PersistentFlags().Lookup("yes"))
 }
 
 // initConfig reads in config file and ENV variables if set.

cmd/update.go

@@ -1,14 +1,12 @@
 package cmd
 
 import (
-	"bufio"
 	"fmt"
-	"github.com/spf13/viper"
-	"os"
-	"strings"
-
+	"github.com/packwiz/packwiz/cmdshared"
 	"github.com/packwiz/packwiz/core"
 	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	"os"
 )
 
 // updateCmd represents the update command
@@ -101,15 +99,7 @@ var updateCmd = &cobra.Command{
 				return
 			}
 
-			fmt.Print("Do you want to update? [Y/n]: ")
-			answer, err := bufio.NewReader(os.Stdin).ReadString('\n')
-			if err != nil {
-				fmt.Println(err)
-				os.Exit(1)
-			}
-
-			ansNormal := strings.ToLower(strings.TrimSpace(answer))
-			if len(ansNormal) > 0 && ansNormal[0] == 'n' {
+			if !cmdshared.PromptYesNo("Do you want to update? [Y/n]: ") {
 				fmt.Println("Cancelled!")
 				return
 			}