Switch to cobra/viper

cmd/refresh.go

@@ -0,0 +1,54 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/comp500/packwiz/core"
+	"github.com/spf13/cobra"
+)
+
+// refreshCmd represents the refresh command
+var refreshCmd = &cobra.Command{
+	Use:   "refresh",
+	Short: "Refresh the index file",
+	Args:  cobra.NoArgs,
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println("Loading modpack...")
+		pack, err := core.LoadPack()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		index, err := pack.LoadIndex()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		err = index.Refresh()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		err = index.Write()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		err = pack.UpdateIndexHash()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		err = pack.Write()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		fmt.Println("Index refreshed!")
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(refreshCmd)
+}

cmd/remove.go

@@ -0,0 +1,71 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/comp500/packwiz/core"
+	"github.com/spf13/cobra"
+)
+
+// removeCmd represents the remove command
+var removeCmd = &cobra.Command{
+	Use:     "remove",
+	Short:   "Remove a mod from the modpack",
+	Aliases: []string{"delete", "uninstall"},
+	Args:    cobra.ExactArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		if len(args[0]) == 0 {
+			fmt.Println("You must specify a mod.")
+			os.Exit(1)
+		}
+		fmt.Println("Loading modpack...")
+		pack, err := core.LoadPack()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		index, err := pack.LoadIndex()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		resolvedMod, ok := index.FindMod(args[0])
+		if !ok {
+			fmt.Println("You don't have this mod installed.")
+			os.Exit(1)
+		}
+		err = os.Remove(resolvedMod)
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		fmt.Println("Removing mod from index...")
+		err = index.RemoveFile(resolvedMod)
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		err = index.Write()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		err = pack.UpdateIndexHash()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		err = pack.Write()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+
+		fmt.Printf("Mod %s removed successfully!", args[0])
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(removeCmd)
+}

cmd/root.go

@@ -0,0 +1,72 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+
+	homedir "github.com/mitchellh/go-homedir"
+	"github.com/spf13/viper"
+)
+
+var packFile string
+var modsFolder string
+var cfgFile string
+
+// rootCmd represents the base command when called without any subcommands
+var rootCmd = &cobra.Command{
+	Use:   "packwiz",
+	Short: "A command line tool for creating Minecraft modpacks",
+}
+
+// Execute starts the root command for packwiz
+func Execute() {
+	if err := rootCmd.Execute(); err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+}
+
+// Add adds a new command as a subcommand to packwiz
+func Add(newCommand *cobra.Command) {
+	rootCmd.AddCommand(newCommand)
+}
+
+func init() {
+	cobra.OnInitialize(initConfig)
+
+	rootCmd.PersistentFlags().StringVar(&packFile, "pack-file", "pack.toml", "The modpack metadata file to use")
+	viper.BindPFlag("pack-file", rootCmd.PersistentFlags().Lookup("pack-file"))
+
+	rootCmd.PersistentFlags().StringVar(&modsFolder, "mods-folder", "mods", "The default folder to store mod metadata files in")
+	viper.BindPFlag("mods-folder", rootCmd.PersistentFlags().Lookup("mods-folder"))
+
+	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.packwiz.toml)")
+}
+
+// initConfig reads in config file and ENV variables if set.
+func initConfig() {
+	if cfgFile != "" {
+		// Use config file from the flag.
+		viper.SetConfigFile(cfgFile)
+	} else {
+		// Find home directory.
+		home, err := homedir.Dir()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+
+		// Search config in home directory with name ".packwiz" (without extension).
+		viper.AddConfigPath(home)
+		viper.SetConfigName(".packwiz")
+	}
+
+	viper.AutomaticEnv() // read in environment variables that match
+
+	// If a config file is found, read it in.
+	if err := viper.ReadInConfig(); err == nil {
+		fmt.Println("Using config file:", viper.ConfigFileUsed())
+	}
+}

cmd/update.go

@@ -0,0 +1,228 @@
+package cmd
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/comp500/packwiz/core"
+	"github.com/spf13/cobra"
+)
+
+// updateCmd represents the update command
+var updateCmd = &cobra.Command{
+	Use:     "update",
+	Short:   "Update a mod (or all mods) in the modpack",
+	Aliases: []string{"upgrade"},
+	Args:    cobra.ExactArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		// TODO: --check flag?
+		// TODO: specify multiple mods to update at once?
+
+		fmt.Println("Loading modpack...")
+		pack, err := core.LoadPack()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		index, err := pack.LoadIndex()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		mcVersion, err := pack.GetMCVersion()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+
+		multiple := false
+		var singleUpdatedName string
+		if len(args[0]) == 0 || args[0] == "*" {
+			multiple = true
+
+			updaterMap := make(map[string][]core.Mod)
+			fmt.Println("Reading mod files...")
+			for _, v := range index.GetAllMods() {
+				modData, err := core.LoadMod(v)
+				if err != nil {
+					fmt.Printf("Error reading mod file: %s", err.Error())
+					continue
+				}
+
+				updaterFound := false
+				for k := range modData.Update {
+					slice, ok := updaterMap[k]
+					if !ok {
+						_, ok = core.Updaters[k]
+						if !ok {
+							continue
+						}
+						slice = []core.Mod{}
+					}
+					updaterFound = true
+					updaterMap[k] = append(slice, modData)
+				}
+				if !updaterFound {
+					fmt.Printf("A supported update system for \"%s\" cannot be found.", modData.Name)
+				}
+			}
+
+			fmt.Println("Checking for updates...")
+			updatesFound := false
+			updaterPointerMap := make(map[string][]*core.Mod)
+			updaterCachedStateMap := make(map[string][]interface{})
+			for k, v := range updaterMap {
+				checks, err := core.Updaters[k].CheckUpdate(v, mcVersion)
+				if err != nil {
+					// TODO: do we return err code 1?
+					fmt.Println(err.Error())
+					continue
+				}
+				for i, check := range checks {
+					if check.Error != nil {
+						// TODO: do we return err code 1?
+						// TODO: better error message?
+						fmt.Println(check.Error.Error())
+						continue
+					}
+					if check.UpdateAvailable {
+						if !updatesFound {
+							fmt.Println("Updates found:")
+							updatesFound = true
+						}
+						fmt.Printf("%s: %s\n", v[i].Name, check.UpdateString)
+						updaterPointerMap[k] = append(updaterPointerMap[k], &v[i])
+						updaterCachedStateMap[k] = append(updaterCachedStateMap[k], check.CachedState)
+					}
+				}
+			}
+
+			if !updatesFound {
+				fmt.Println("All mods are up to date!")
+				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' {
+				fmt.Println("Cancelled!")
+				return
+			}
+
+			for k, v := range updaterPointerMap {
+				err := core.Updaters[k].DoUpdate(v, updaterCachedStateMap[k])
+				if err != nil {
+					// TODO: do we return err code 1?
+					fmt.Println(err.Error())
+					continue
+				}
+				for _, modData := range v {
+					format, hash, err := modData.Write()
+					if err != nil {
+						fmt.Println(err.Error())
+						continue
+					}
+					err = index.RefreshFileWithHash(modData.GetFilePath(), format, hash, true)
+					if err != nil {
+						fmt.Println(err.Error())
+						continue
+					}
+				}
+			}
+		} else {
+			modPath, ok := index.FindMod(args[0])
+			if !ok {
+				fmt.Println("You don't have this mod installed.")
+				os.Exit(1)
+			}
+			modData, err := core.LoadMod(modPath)
+			if err != nil {
+				fmt.Println(err)
+				os.Exit(1)
+			}
+			singleUpdatedName = modData.Name
+			updaterFound := false
+			for k := range modData.Update {
+				updater, ok := core.Updaters[k]
+				if !ok {
+					continue
+				}
+				updaterFound = true
+
+				check, err := updater.CheckUpdate([]core.Mod{modData}, mcVersion)
+				if err != nil {
+					fmt.Println(err)
+					os.Exit(1)
+				}
+				if len(check) != 1 {
+					fmt.Println("Invalid update check response")
+					os.Exit(1)
+				}
+
+				if check[0].UpdateAvailable {
+					fmt.Printf("Update available: %s\n", check[0].UpdateString)
+
+					err = updater.DoUpdate([]*core.Mod{&modData}, []interface{}{check[0].CachedState})
+					if err != nil {
+						fmt.Println(err)
+						os.Exit(1)
+					}
+
+					format, hash, err := modData.Write()
+					if err != nil {
+						fmt.Println(err)
+						os.Exit(1)
+					}
+					err = index.RefreshFileWithHash(modPath, format, hash, true)
+					if err != nil {
+						fmt.Println(err)
+						os.Exit(1)
+					}
+				} else {
+					fmt.Printf("\"%s\" is already up to date!\n", modData.Name)
+					return
+				}
+
+				break
+			}
+			if !updaterFound {
+				// TODO: use file name instead of Name when len(Name) == 0 in all places?
+				fmt.Println("A supported update system for \"" + modData.Name + "\" cannot be found.")
+				os.Exit(1)
+			}
+		}
+
+		err = index.Write()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		err = pack.UpdateIndexHash()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		err = pack.Write()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		if multiple {
+			fmt.Println("Mods updated!")
+		} else {
+			fmt.Printf("\"%s\" updated!\n", singleUpdatedName)
+		}
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(updateCmd)
+}

core/commands.go

@@ -1,6 +0,0 @@
-package core
-import "github.com/urfave/cli"
-
-// Commands stores all the commands that packwiz can run. Append to this slice to add your own commands.
-var Commands []cli.Command
-

core/flags.go

@@ -1,33 +0,0 @@
-package core
-import (
-	"github.com/urfave/cli"
-)
-
-// Flags stores common information passed as flags to the program.
-type Flags struct {
-	PackFile   string
-	ModsFolder string
-}
-
-// FlagsFromContext converts a CLI context (from commands) into a Flags struct, for use in helper functions.
-func FlagsFromContext(c *cli.Context) Flags {
-	return Flags{
-		c.GlobalString("pack-file"),
-		c.GlobalString("mods-folder"),
-	}
-}
-
-// CLIFlags is used internally to initialise the internal flags (easier to keep in one place)
-var CLIFlags = [...]cli.Flag{
-	cli.StringFlag{
-		Name:  "pack-file",
-		Value: "pack.toml",
-		Usage: "The modpack metadata file to use",
-	},
-	cli.StringFlag{
-		Name:  "mods-folder",
-		Value: "mods",
-		Usage: "The mods folder to use",
-	},
-}
-

core/index.go

@@ -12,6 +12,7 @@ import (
 
 	"github.com/BurntSushi/toml"
 	"github.com/denormal/go-gitignore"
+	"github.com/spf13/viper"
 	"github.com/vbauerster/mpb/v4"
 	"github.com/vbauerster/mpb/v4/decor"
 )
@@ -20,7 +21,6 @@ import (
 type Index struct {
 	HashFormat string      `toml:"hash-format"`
 	Files      []IndexFile `toml:"files"`
-	flags      Flags
 	indexFile  string
 }
 
@@ -37,12 +37,11 @@ type IndexFile struct {
 }
 
 // LoadIndex attempts to load the index file from a path
-func LoadIndex(indexFile string, flags Flags) (Index, error) {
+func LoadIndex(indexFile string) (Index, error) {
 	var index Index
 	if _, err := toml.DecodeFile(indexFile, &index); err != nil {
 		return Index{}, err
 	}
-	index.flags = flags
 	index.indexFile = indexFile
 	if len(index.HashFormat) == 0 {
 		index.HashFormat = "sha256"
@@ -144,7 +143,7 @@ func (in *Index) updateFile(path string) error {
 	// of files, like CraftTweaker resources.
 	absFileDir, err := filepath.Abs(filepath.Dir(path))
 	if err == nil {
-		absModsDir, err := filepath.Abs(in.flags.ModsFolder)
+		absModsDir, err := filepath.Abs(viper.GetString("mods-folder"))
 		if err == nil {
 			if absFileDir == absModsDir {
 				mod = true
@@ -161,11 +160,11 @@ func (in *Index) Refresh() error {
 	// for i := 0; i < runtime.NumCPU(); i++ {}
 
 	// Is case-sensitivity a problem?
-	pathPF, _ := filepath.Abs(in.flags.PackFile)
+	pathPF, _ := filepath.Abs(viper.GetString("pack-file"))
 	pathIndex, _ := filepath.Abs(in.indexFile)
 
 	// TODO: A method of specifying pack root directory?
-	packRoot := filepath.Dir(in.flags.PackFile)
+	packRoot := filepath.Dir(viper.GetString("pack-file"))
 	ignoreExists := true
 	pathIgnore, _ := filepath.Abs(filepath.Join(packRoot, ".packwizignore"))
 	ignore, err := gitignore.NewFromFile(filepath.Join(packRoot, ".packwizignore"))

core/mod.go

@@ -67,8 +67,8 @@ func LoadMod(modFile string) (Mod, error) {
 }
 
 // SetMetaName sets the mod metadata file from a given file name (to be put in the mods folder)
-func (m *Mod) SetMetaName(metaName string, flags Flags) string {
+func (m *Mod) SetMetaName(metaName string) string {
-	m.metaFile = ResolveMod(metaName, flags)
+	m.metaFile = ResolveMod(metaName)
 	return m.metaFile
 }
 

core/pack.go

@@ -1,4 +1,5 @@
 package core
+
 import (
 	"crypto/sha256"
 	"encoding/hex"
@@ -8,6 +9,7 @@ import (
 	"path/filepath"
 
 	"github.com/BurntSushi/toml"
+	"github.com/spf13/viper"
 )
 
 // Pack stores the modpack metadata, usually in pack.toml
@@ -22,36 +24,34 @@ type Pack struct {
 	Versions map[string]string         `toml:"versions"`
 	Client   map[string]toml.Primitive `toml:"client"`
 	Server   map[string]toml.Primitive `toml:"server"`
-	flags    Flags
 }
 
 // LoadPack loads the modpack metadata to a Pack struct
-func LoadPack(flags Flags) (Pack, error) {
+func LoadPack() (Pack, error) {
 	var modpack Pack
-	if _, err := toml.DecodeFile(flags.PackFile, &modpack); err != nil {
+	if _, err := toml.DecodeFile(viper.GetString("pack-file"), &modpack); err != nil {
 		return Pack{}, err
 	}
 
 	if len(modpack.Index.File) == 0 {
 		modpack.Index.File = "index.toml"
 	}
-	modpack.flags = flags
 	return modpack, nil
 }
 
 // LoadIndex attempts to load the index file of this modpack
 func (pack Pack) LoadIndex() (Index, error) {
 	if filepath.IsAbs(pack.Index.File) {
-		return LoadIndex(pack.Index.File, pack.flags)
+		return LoadIndex(pack.Index.File)
 	}
 	fileNative := filepath.FromSlash(pack.Index.File)
-	return LoadIndex(filepath.Join(filepath.Dir(pack.flags.PackFile), fileNative), pack.flags)
+	return LoadIndex(filepath.Join(filepath.Dir(viper.GetString("pack-file")), fileNative))
 }
 
 // UpdateIndexHash recalculates the hash of the index file of this modpack
 func (pack *Pack) UpdateIndexHash() error {
 	fileNative := filepath.FromSlash(pack.Index.File)
-	indexFile := filepath.Join(filepath.Dir(pack.flags.PackFile), fileNative)
+	indexFile := filepath.Join(filepath.Dir(viper.GetString("pack-file")), fileNative)
 	if filepath.IsAbs(pack.Index.File) {
 		indexFile = pack.Index.File
 	}
@@ -78,7 +78,7 @@ func (pack *Pack) UpdateIndexHash() error {
 
 // Write saves the pack file
 func (pack Pack) Write() error {
-	f, err := os.Create(pack.flags.PackFile)
+	f, err := os.Create(viper.GetString("pack-file"))
 	if err != nil {
 		return err
 	}
@@ -98,4 +98,3 @@ func (pack Pack) GetMCVersion() (string, error) {
 	}
 	return mcVersion, nil
 }
-

core/resolve.go

@@ -3,14 +3,16 @@ package core
 import (
 	"path/filepath"
 	"strings"
+
+	"github.com/spf13/viper"
 )
 
 // ModExtension is the file extension of the mod metadata files
 const ModExtension = ".toml"
 
 // ResolveMod returns the path to a mod file from it's name
-func ResolveMod(modName string, flags Flags) string {
+func ResolveMod(modName string) string {
 	// TODO: should this work for any metadata file?
 	fileName := strings.ToLower(strings.TrimSuffix(modName, ModExtension)) + ModExtension
-	return filepath.Join(flags.ModsFolder, fileName)
+	return filepath.Join(viper.GetString("mods-folder"), fileName)
 }

curseforge/curseforge.go

@@ -2,44 +2,23 @@ package curseforge
 
 import (
 	"errors"
-	"fmt"
 	"regexp"
 	"strconv"
 
+	"github.com/comp500/packwiz/cmd"
 	"github.com/comp500/packwiz/core"
 	"github.com/mitchellh/mapstructure"
-	"github.com/skratchdot/open-golang/open"
+	"github.com/spf13/cobra"
-	"github.com/urfave/cli"
 )
 
-func init() {
+var curseforgeCmd = &cobra.Command{
-	core.Commands = append(core.Commands, cli.Command{
+	Use:     "curseforge",
-		Name:    "curseforge",
 	Aliases: []string{"cf", "curse"},
-		Usage:   "Manage curseforge-based mods",
+	Short:   "Manage curseforge-based mods",
-		Subcommands: []cli.Command{{
+}
-			Name:    "install",
+
-			Usage:   "Install a mod from a curseforge URL, slug or ID",
+func init() {
-			Aliases: []string{"add", "get"},
+	cmd.Add(curseforgeCmd)
-			Action: func(c *cli.Context) error {
-				return cmdInstall(core.FlagsFromContext(c), c.Args().Get(0), c.Args().Tail())
-			},
-		}, {
-			Name:  "import",
-			Usage: "Import an installed curseforge modpack",
-			Action: func(c *cli.Context) error {
-				return cmdImport(core.FlagsFromContext(c), c.Args().Get(0))
-			},
-		}, {
-			Name: "open",
-			// TODO: change semantics to "project" rather than "mod", as this supports texture packs and misc content as well?
-			Usage:   "Open the project page for a curseforge mod in your browser",
-			Aliases: []string{"doc"},
-			Action: func(c *cli.Context) error {
-				return cmdDoc(core.FlagsFromContext(c), c.Args().Get(0))
-			},
-		}},
-	})
 	core.Updaters["curseforge"] = cfUpdater{}
 }
 
@@ -99,7 +78,7 @@ func getModIDFromString(mod string) (bool, int, error) {
 	return false, 0, nil
 }
 
-func createModFile(flags core.Flags, modInfo modInfo, fileInfo modFileInfo, index *core.Index) error {
+func createModFile(modInfo modInfo, fileInfo modFileInfo, index *core.Index) error {
 	updateMap := make(map[string]map[string]interface{})
 	var err error
 
@@ -126,7 +105,7 @@ func createModFile(flags core.Flags, modInfo modInfo, fileInfo modFileInfo, inde
 		},
 		Update: updateMap,
 	}
-	path := modMeta.SetMetaName(modInfo.Slug, flags)
+	path := modMeta.SetMetaName(modInfo.Slug)
 
 	// If the file already exists, this will overwrite it!!!
 	// TODO: Should this be improved?
@@ -141,45 +120,6 @@ func createModFile(flags core.Flags, modInfo modInfo, fileInfo modFileInfo, inde
 	return index.RefreshFileWithHash(path, format, hash, true)
 }
 
-func cmdDoc(flags core.Flags, mod string) error {
-	if len(mod) == 0 {
-		return cli.NewExitError("You must specify a mod.", 1)
-	}
-
-	fmt.Println("Loading modpack...")
-	pack, err := core.LoadPack(flags)
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	index, err := pack.LoadIndex()
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	resolvedMod, ok := index.FindMod(mod)
-	if !ok {
-		// TODO: should this auto-refresh???????
-		return cli.NewExitError("You don't have this mod installed.", 1)
-	}
-	modData, err := core.LoadMod(resolvedMod)
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	updateData, ok := modData.GetParsedUpdateData("curseforge")
-	if !ok {
-		return cli.NewExitError("This mod doesn't seem to be a curseforge mod!", 1)
-	}
-	cfUpdateData := updateData.(cfUpdateData)
-	fmt.Println("Opening browser...")
-	url := "https://minecraft.curseforge.com/projects/" + strconv.Itoa(cfUpdateData.ProjectID)
-	err = open.Start(url)
-	if err != nil {
-		fmt.Println("Opening page failed, direct link:")
-		fmt.Println(url)
-	}
-
-	return nil
-}
-
 type cfUpdateData struct {
 	ProjectID      int    `mapstructure:"project-id"`
 	FileID         int    `mapstructure:"file-id"`

curseforge/import.go

@@ -6,7 +6,7 @@ import (
 	"os"
 
 	"github.com/comp500/packwiz/core"
-	"github.com/urfave/cli"
+	"github.com/spf13/cobra"
 )
 
 type twitchPackMeta struct {
@@ -42,25 +42,34 @@ type twitchPackMeta struct {
 	} `json:"installedAddons"`
 }
 
-func cmdImport(flags core.Flags, file string) error {
+// importCmd represents the import command
-	pack, err := core.LoadPack(flags)
+var importCmd = &cobra.Command{
+	Use:   "import",
+	Short: "Import an installed curseforge modpack",
+	Args:  cobra.ExactArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		pack, err := core.LoadPack()
 		if err != nil {
-		return cli.NewExitError(err, 1)
+			fmt.Println(err)
+			os.Exit(1)
 		}
 		index, err := pack.LoadIndex()
 		if err != nil {
-		return cli.NewExitError(err, 1)
+			fmt.Println(err)
+			os.Exit(1)
 		}
 
 		var packMeta twitchPackMeta
 		// TODO: is this relative to something?
-	f, err := os.Open(file)
+		f, err := os.Open(args[0])
 		if err != nil {
-		return cli.NewExitError(err, 1)
+			fmt.Println(err)
+			os.Exit(1)
 		}
 		err = json.NewDecoder(f).Decode(&packMeta)
 		if err != nil {
-		return cli.NewExitError(err, 1)
+			fmt.Println(err)
+			os.Exit(1)
 		}
 
 		modIDs := make([]int, len(packMeta.Mods))
@@ -72,7 +81,8 @@ func cmdImport(flags core.Flags, file string) error {
 
 		modInfos, err := getModInfoMultiple(modIDs)
 		if err != nil {
-		return cli.NewExitError(err, 1)
+			fmt.Println(err)
+			os.Exit(1)
 		}
 
 		modInfosMap := make(map[int]modInfo)
@@ -94,9 +104,10 @@ func cmdImport(flags core.Flags, file string) error {
 
 			fmt.Printf("Imported mod \"%s\" successfully!\n", modInfoValue.Name)
 
-		err = createModFile(flags, modInfoValue, modFileInfo(v.File), &index)
+			err = createModFile(modInfoValue, modFileInfo(v.File), &index)
 			if err != nil {
-			return cli.NewExitError(err, 1)
+				fmt.Println(err)
+				os.Exit(1)
 			}
 		}
 
@@ -104,16 +115,22 @@ func cmdImport(flags core.Flags, file string) error {
 
 		err = index.Write()
 		if err != nil {
-		return cli.NewExitError(err, 1)
+			fmt.Println(err)
+			os.Exit(1)
 		}
 		err = pack.UpdateIndexHash()
 		if err != nil {
-		return cli.NewExitError(err, 1)
+			fmt.Println(err)
+			os.Exit(1)
 		}
 		err = pack.Write()
 		if err != nil {
-		return cli.NewExitError(err, 1)
+			fmt.Println(err)
+			os.Exit(1)
 		}
-
+	},
-	return nil
+}
+
+func init() {
+	curseforgeCmd.AddCommand(importCmd)
 }

curseforge/install.go

@@ -10,7 +10,7 @@ import (
 
 	"github.com/agnivade/levenshtein"
 	"github.com/comp500/packwiz/core"
-	"github.com/urfave/cli"
+	"github.com/spf13/cobra"
 	"gopkg.in/dixonwille/wmenu.v4"
 )
 
@@ -21,34 +21,45 @@ type installableDep struct {
 	fileInfo modFileInfo
 }
 
-func cmdInstall(flags core.Flags, mod string, modArgsTail []string) error {
+// installCmd represents the install command
-	if len(mod) == 0 {
+var installCmd = &cobra.Command{
-		return cli.NewExitError("You must specify a mod.", 1)
+	Use:     "install",
+	Short:   "Install a mod from a curseforge URL, slug or ID",
+	Aliases: []string{"add", "get"},
+	Args:    cobra.ArbitraryArgs,
+	Run: func(cmd *cobra.Command, args []string) {
+		if len(args[0]) == 0 {
+			fmt.Println("You must specify a mod.")
+			os.Exit(1)
 		}
-	pack, err := core.LoadPack(flags)
+		pack, err := core.LoadPack()
 		if err != nil {
-		return cli.NewExitError(err, 1)
+			fmt.Println(err)
+			os.Exit(1)
 		}
 		index, err := pack.LoadIndex()
 		if err != nil {
-		return cli.NewExitError(err, 1)
+			fmt.Println(err)
+			os.Exit(1)
 		}
 		mcVersion, err := pack.GetMCVersion()
 		if err != nil {
-		return cli.NewExitError(err, 1)
+			fmt.Println(err)
+			os.Exit(1)
 		}
 
 		var done bool
 		var modID, fileID int
-	// If modArgsTail has anything, go straight to searching - URLs/Slugs should not have spaces!
+		// If there are more than 1 argument, go straight to searching - URLs/Slugs should not have spaces!
-	if len(modArgsTail) == 0 {
+		if len(args) == 1 {
-		done, modID, fileID, err = getFileIDsFromString(mod)
+			done, modID, fileID, err = getFileIDsFromString(args[0])
 			if err != nil {
-			return cli.NewExitError(err, 1)
+				fmt.Println(err)
+				os.Exit(1)
 			}
 
 			if !done {
-			done, modID, err = getModIDFromString(mod)
+				done, modID, err = getModIDFromString(args[0])
 				// Ignore error, go to search instead (e.g. lowercase to search instead of as a slug)
 				if err != nil {
 					done = false
@@ -61,15 +72,16 @@ func cmdInstall(flags core.Flags, mod string, modArgsTail []string) error {
 
 		if !done {
 			fmt.Println("Searching CurseForge...")
-		modArgs := append([]string{mod}, modArgsTail...)
+			searchTerm := strings.Join(args, " ")
-		searchTerm := strings.Join(modArgs, " ")
 			results, err := getSearch(searchTerm, mcVersion)
 			if err != nil {
-			return cli.NewExitError(err, 1)
+				fmt.Println(err)
+				os.Exit(1)
 			}
 
 			if len(results) == 0 {
-			return cli.NewExitError("No mods found!", 1)
+				fmt.Println("No mods found!")
+				os.Exit(1)
 			} else if len(results) == 1 {
 				modInfoData = results[0]
 				modID = modInfoData.ID
@@ -98,7 +110,8 @@ func cmdInstall(flags core.Flags, mod string, modArgsTail []string) error {
 					var ok bool
 					modInfoData, ok = menuRes[0].Value.(modInfo)
 					if !ok {
-					return cli.NewExitError("Error converting interface from wmenu", 1)
+						fmt.Println("Error converting interface from wmenu")
+						os.Exit(1)
 					}
 					modID = modInfoData.ID
 					modInfoObtained = true
@@ -107,33 +120,38 @@ func cmdInstall(flags core.Flags, mod string, modArgsTail []string) error {
 				})
 				err = menu.Run()
 				if err != nil {
-				return cli.NewExitError(err, 1)
+					fmt.Println(err)
+					os.Exit(1)
 				}
 
 				if !done {
-				return nil
+					return
 				}
 			}
 		}
 
 		if !done {
 			if err == nil {
-			return cli.NewExitError("No mods found!", 1)
+				fmt.Println("No mods found!")
+				os.Exit(1)
 			}
-		return cli.NewExitError(err, 1)
+			fmt.Println(err)
+			os.Exit(1)
 		}
 
 		if !modInfoObtained {
 			modInfoData, err = getModInfo(modID)
 			if err != nil {
-			return cli.NewExitError(err, 1)
+				fmt.Println(err)
+				os.Exit(1)
 			}
 		}
 
 		var fileInfoData modFileInfo
 		fileInfoData, err = getLatestFile(modInfoData, mcVersion, fileID)
 		if err != nil {
-		return cli.NewExitError(err, 1)
+			fmt.Println(err)
+			os.Exit(1)
 		}
 
 		if len(fileInfoData.Dependencies) > 0 {
@@ -218,7 +236,8 @@ func cmdInstall(flags core.Flags, mod string, modArgsTail []string) error {
 					cycles++
 				}
 				if cycles >= maxCycles {
-				return cli.NewExitError("Dependencies recurse too deeply! Try increasing maxCycles.", 1)
+					fmt.Println("Dependencies recurse too deeply! Try increasing maxCycles.")
+					os.Exit(1)
 				}
 
 				if len(depsInstallable) > 0 {
@@ -230,15 +249,17 @@ func cmdInstall(flags core.Flags, mod string, modArgsTail []string) error {
 					fmt.Print("Would you like to install them? [Y/n]: ")
 					answer, err := bufio.NewReader(os.Stdin).ReadString('\n')
 					if err != nil {
-					return cli.NewExitError(err, 1)
+						fmt.Println(err)
+						os.Exit(1)
 					}
 
 					ansNormal := strings.ToLower(strings.TrimSpace(answer))
 					if !(len(ansNormal) > 0 && ansNormal[0] == 'n') {
 						for _, v := range depsInstallable {
-						err = createModFile(flags, v.modInfo, v.fileInfo, &index)
+							err = createModFile(v.modInfo, v.fileInfo, &index)
 							if err != nil {
-							return cli.NewExitError(err, 1)
+								fmt.Println(err)
+								os.Exit(1)
 							}
 							fmt.Printf("Dependency \"%s\" successfully installed! (%s)\n", v.modInfo.Name, v.fileInfo.FileName)
 						}
@@ -249,27 +270,30 @@ func cmdInstall(flags core.Flags, mod string, modArgsTail []string) error {
 			}
 		}
 
-	err = createModFile(flags, modInfoData, fileInfoData, &index)
+		err = createModFile(modInfoData, fileInfoData, &index)
 		if err != nil {
-		return cli.NewExitError(err, 1)
+			fmt.Println(err)
+			os.Exit(1)
 		}
 
 		err = index.Write()
 		if err != nil {
-		return cli.NewExitError(err, 1)
+			fmt.Println(err)
+			os.Exit(1)
 		}
 		err = pack.UpdateIndexHash()
 		if err != nil {
-		return cli.NewExitError(err, 1)
+			fmt.Println(err)
+			os.Exit(1)
 		}
 		err = pack.Write()
 		if err != nil {
-		return cli.NewExitError(err, 1)
+			fmt.Println(err)
+			os.Exit(1)
 		}
 
 		fmt.Printf("Mod \"%s\" successfully installed! (%s)\n", modInfoData.Name, fileInfoData.FileName)
-
+	},
-	return nil
 }
 
 func getLatestFile(modInfoData modInfo, mcVersion string, fileID int) (modFileInfo, error) {
@@ -300,3 +324,7 @@ func getLatestFile(modInfoData modInfo, mcVersion string, fileID int) (modFileIn
 	}
 	return fileInfoData, nil
 }
+
+func init() {
+	curseforgeCmd.AddCommand(installCmd)
+}

curseforge/open.go

@@ -0,0 +1,66 @@
+package curseforge
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+
+	"github.com/comp500/packwiz/core"
+	"github.com/skratchdot/open-golang/open"
+	"github.com/spf13/cobra"
+)
+
+// openCmd represents the open command
+var openCmd = &cobra.Command{
+	Use: "open",
+	// TODO: change semantics to "project" rather than "mod", as this supports texture packs and misc content as well?
+	Short:   "Open the project page for a curseforge mod in your browser",
+	Aliases: []string{"doc"},
+	Args:    cobra.ExactArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		if len(args[0]) == 0 {
+			fmt.Println("You must specify a mod.")
+			os.Exit(1)
+		}
+
+		fmt.Println("Loading modpack...")
+		pack, err := core.LoadPack()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		index, err := pack.LoadIndex()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		resolvedMod, ok := index.FindMod(args[0])
+		if !ok {
+			// TODO: should this auto-refresh???????
+			fmt.Println("You don't have this mod installed.")
+			os.Exit(1)
+		}
+		modData, err := core.LoadMod(resolvedMod)
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		updateData, ok := modData.GetParsedUpdateData("curseforge")
+		if !ok {
+			fmt.Println("This mod doesn't seem to be a curseforge mod!")
+			os.Exit(1)
+		}
+		cfUpdateData := updateData.(cfUpdateData)
+		fmt.Println("Opening browser...")
+		url := "https://minecraft.curseforge.com/projects/" + strconv.Itoa(cfUpdateData.ProjectID)
+		err = open.Start(url)
+		if err != nil {
+			fmt.Println("Opening page failed, direct link:")
+			fmt.Println(url)
+		}
+	},
+}
+
+func init() {
+	curseforgeCmd.AddCommand(openCmd)
+}

go.mod

@@ -4,18 +4,17 @@ require (
 	github.com/BurntSushi/toml v0.3.1
 	github.com/agnivade/levenshtein v1.0.2
 	github.com/danwakefield/fnmatch v0.0.0-20160403171240-cbb64ac3d964 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/daviddengcn/go-colortext v0.0.0-20180409174941-186a3d44e920 // indirect
 	github.com/denormal/go-gitignore v0.0.0-20180930084346-ae8ad1d07817
 	github.com/golangplus/bytes v0.0.0-20160111154220-45c989fe5450 // indirect
 	github.com/golangplus/fmt v0.0.0-20150411045040-2a5d6d7d2995 // indirect
 	github.com/golangplus/testing v0.0.0-20180327235837-af21d9c3145e // indirect
 	github.com/mattn/go-isatty v0.0.4 // indirect
+	github.com/mitchellh/go-homedir v1.1.0
 	github.com/mitchellh/mapstructure v1.1.2
-	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/skratchdot/open-golang v0.0.0-20190402232053-79abb63cd66e
-	github.com/stretchr/testify v1.2.2 // indirect
+	github.com/spf13/cobra v0.0.5
-	github.com/urfave/cli v1.20.0
+	github.com/spf13/viper v1.4.0
 	github.com/vbauerster/mpb/v4 v4.7.0
 	gopkg.in/dixonwille/wlog.v2 v2.0.0 // indirect
 	gopkg.in/dixonwille/wmenu.v4 v4.0.2

go.sum

@@ -1,9 +1,25 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/VividCortex/ewma v1.1.1 h1:MnEK4VOv6n0RSY4vtRe3h11qjxL3+t0B8yOL8iMXdcM=
 github.com/VividCortex/ewma v1.1.1/go.mod h1:2Tkkvm3sRDVXaiyucHiACn4cqf7DpdyLvmxzcbUokwA=
 github.com/agnivade/levenshtein v1.0.2 h1:xKF7WlEzoa+ZVkzBxy0ukdzI2etYiWGlTPMNTBGncKI=
 github.com/agnivade/levenshtein v1.0.2/go.mod h1:JLvzGblJATanj48SD0YhHTEFGkWvw3ASLFWSiMIFXsE=
+github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
+github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
+github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
+github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
+github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
+github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
+github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
+github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
+github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
 github.com/danwakefield/fnmatch v0.0.0-20160403171240-cbb64ac3d964 h1:y5HC9v93H5EPKqaS1UYVg1uYah5Xf51mBfIoWehClUQ=
 github.com/danwakefield/fnmatch v0.0.0-20160403171240-cbb64ac3d964/go.mod h1:Xd9hchkHSWYkEqJwUGisez3G1QY8Ryz0sdWrLPMGjLk=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
@@ -12,36 +28,155 @@ github.com/daviddengcn/go-colortext v0.0.0-20180409174941-186a3d44e920 h1:d/cVoZ
 github.com/daviddengcn/go-colortext v0.0.0-20180409174941-186a3d44e920/go.mod h1:dv4zxwHi5C/8AeI+4gX4dCWOIvNi7I6JCSX0HvlKPgE=
 github.com/denormal/go-gitignore v0.0.0-20180930084346-ae8ad1d07817 h1:0nsrg//Dc7xC74H/TZ5sYR8uk4UQRNjsw8zejqH5a4Q=
 github.com/denormal/go-gitignore v0.0.0-20180930084346-ae8ad1d07817/go.mod h1:C/+sI4IFnEpCn6VQ3GIPEp+FrQnQw+YQP3+n+GdGq7o=
+github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
+github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
+github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
+github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
+github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
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main.go

@@ -1,316 +1,11 @@
 package main
 
 import (
-	"fmt"
-	"log"
-	"os"
-	"strings"
-	"bufio"
-
-	"github.com/comp500/packwiz/core"
-	"github.com/urfave/cli"
-
 	// Modules of packwiz
+	"github.com/comp500/packwiz/cmd"
 	_ "github.com/comp500/packwiz/curseforge"
 )
 
-func init() {
-	core.Commands = append(core.Commands, cli.Command{
-		Name:    "remove",
-		Aliases: []string{"delete", "uninstall"},
-		Usage:   "Remove a mod from the modpack",
-		Action: func(c *cli.Context) error {
-			return cmdDelete(core.FlagsFromContext(c), c.Args().Get(0))
-		},
-	}, cli.Command{
-		Name:    "update",
-		Aliases: []string{"upgrade"},
-		Usage:   "Update a mod (or all mods) in the modpack",
-		Action: func(c *cli.Context) error {
-			return cmdUpdate(core.FlagsFromContext(c), c.Args().Get(0))
-		},
-	}, cli.Command{
-		Name:  "refresh",
-		Usage: "Refresh the index file",
-		Action: func(c *cli.Context) error {
-			return cmdRefresh(core.FlagsFromContext(c))
-		},
-	})
-}
 func main() {
-	app := cli.NewApp()
+	cmd.Execute()
-	app.Commands = core.Commands
-	app.Flags = core.CLIFlags[:]
-	app.HideVersion = true
-	app.Usage = "A command line tool for creating Minecraft modpacks."
-
-	err := app.Run(os.Args)
-	if err != nil {
-		log.Fatal(err)
-	}
-}
-
-func cmdDelete(flags core.Flags, mod string) error {
-	if len(mod) == 0 {
-		return cli.NewExitError("You must specify a mod.", 1)
-	}
-	fmt.Println("Loading modpack...")
-	pack, err := core.LoadPack(flags)
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	index, err := pack.LoadIndex()
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	resolvedMod, ok := index.FindMod(mod)
-	if !ok {
-		return cli.NewExitError("You don't have this mod installed.", 1)
-	}
-	err = os.Remove(resolvedMod)
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	fmt.Println("Removing mod from index...")
-	err = index.RemoveFile(resolvedMod)
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	err = index.Write()
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	err = pack.UpdateIndexHash()
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	err = pack.Write()
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-
-	fmt.Printf("Mod %s removed successfully!", mod)
-	return nil
-}
-
-func cmdRefresh(flags core.Flags) error {
-	fmt.Println("Loading modpack...")
-	pack, err := core.LoadPack(flags)
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	index, err := pack.LoadIndex()
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	err = index.Refresh()
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	err = index.Write()
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	err = pack.UpdateIndexHash()
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	err = pack.Write()
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	fmt.Println("Index refreshed!")
-	return nil
-}
-
-func cmdUpdate(flags core.Flags, mod string) error {
-	// TODO: --check flag?
-	// TODO: specify multiple mods to update at once?
-
-	fmt.Println("Loading modpack...")
-	pack, err := core.LoadPack(flags)
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	index, err := pack.LoadIndex()
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	mcVersion, err := pack.GetMCVersion()
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-
-	multiple := false
-	var singleUpdatedName string
-	if len(mod) == 0 || mod == "*" {
-		multiple = true
-
-		updaterMap := make(map[string][]core.Mod)
-		fmt.Println("Reading mod files...")
-		for _, v := range index.GetAllMods() {
-			modData, err := core.LoadMod(v)
-			if err != nil {
-				fmt.Printf("Error reading mod file: %s", err.Error())
-				continue
-			}
-
-			updaterFound := false
-			for k := range modData.Update {
-				slice, ok := updaterMap[k]
-				if !ok {
-					_, ok = core.Updaters[k]
-					if !ok {
-						continue
-					}
-					slice = []core.Mod{}
-				}
-				updaterFound = true
-				updaterMap[k] = append(slice, modData)
-			}
-			if !updaterFound {
-				fmt.Printf("A supported update system for \"%s\" cannot be found.", modData.Name)
-			}
-		}
-
-		fmt.Println("Checking for updates...")
-		updatesFound := false
-		updaterPointerMap := make(map[string][]*core.Mod)
-		updaterCachedStateMap := make(map[string][]interface{})
-		for k, v := range updaterMap {
-			checks, err := core.Updaters[k].CheckUpdate(v, mcVersion)
-			if err != nil {
-				// TODO: do we return err code 1?
-				fmt.Println(err.Error())
-				continue
-			}
-			for i, check := range checks {
-				if check.Error != nil {
-					// TODO: do we return err code 1?
-					// TODO: better error message?
-					fmt.Println(check.Error.Error())
-					continue
-				}
-				if check.UpdateAvailable {
-					if !updatesFound {
-						fmt.Println("Updates found:")
-						updatesFound = true
-					}
-					fmt.Printf("%s: %s\n", v[i].Name, check.UpdateString)
-					updaterPointerMap[k] = append(updaterPointerMap[k], &v[i])
-					updaterCachedStateMap[k] = append(updaterCachedStateMap[k], check.CachedState)
-				}
-			}
-		}
-
-		if !updatesFound {
-			fmt.Println("All mods are up to date!")
-			return nil
-		}
-
-		fmt.Print("Do you want to update? [Y/n]: ")
-		answer, err := bufio.NewReader(os.Stdin).ReadString('\n')
-		if err != nil {
-			return cli.NewExitError(err, 1)
-		}
-
-		ansNormal := strings.ToLower(strings.TrimSpace(answer))
-		if len(ansNormal) > 0 && ansNormal[0] == 'n' {
-			fmt.Println("Cancelled!")
-			return nil
-		}
-
-		for k, v := range updaterPointerMap {
-			err := core.Updaters[k].DoUpdate(v, updaterCachedStateMap[k])
-			if err != nil {
-				// TODO: do we return err code 1?
-				fmt.Println(err.Error())
-				continue
-			}
-			for _, modData := range v {
-				format, hash, err := modData.Write()
-				if err != nil {
-					fmt.Println(err.Error())
-					continue
-				}
-				err = index.RefreshFileWithHash(modData.GetFilePath(), format, hash, true)
-				if err != nil {
-					fmt.Println(err.Error())
-					continue
-				}
-			}
-		}
-	} else {
-		modPath, ok := index.FindMod(mod)
-		if !ok {
-			return cli.NewExitError("You don't have this mod installed.", 1)
-		}
-		modData, err := core.LoadMod(modPath)
-		if err != nil {
-			return cli.NewExitError(err, 1)
-		}
-		singleUpdatedName = modData.Name
-		updaterFound := false
-		for k := range modData.Update {
-			updater, ok := core.Updaters[k]
-			if !ok {
-				continue
-			}
-			updaterFound = true
-
-			check, err := updater.CheckUpdate([]core.Mod{modData}, mcVersion)
-			if err != nil {
-				return cli.NewExitError(err, 1)
-			}
-			if len(check) != 1 {
-				return cli.NewExitError("Invalid update check response", 1)
-			}
-
-			if check[0].UpdateAvailable {
-				fmt.Printf("Update available: %s\n", check[0].UpdateString)
-
-				err = updater.DoUpdate([]*core.Mod{&modData}, []interface{}{check[0].CachedState})
-				if err != nil {
-					return cli.NewExitError(err, 1)
-				}
-
-				format, hash, err := modData.Write()
-				if err != nil {
-					return cli.NewExitError(err, 1)
-				}
-				err = index.RefreshFileWithHash(modPath, format, hash, true)
-				if err != nil {
-					return cli.NewExitError(err, 1)
-				}
-			} else {
-				fmt.Printf("\"%s\" is already up to date!\n", modData.Name)
-				return nil
-			}
-
-			break
-		}
-		if !updaterFound {
-			// TODO: use file name instead of Name when len(Name) == 0 in all places?
-			return cli.NewExitError("A supported update system for \""+modData.Name+"\" cannot be found.", 1)
-		}
-	}
-
-	err = index.Write()
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	err = pack.UpdateIndexHash()
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	err = pack.Write()
-	if err != nil {
-		return cli.NewExitError(err, 1)
-	}
-	if multiple {
-		fmt.Println("Mods updated!")
-	} else {
-		fmt.Printf("\"%s\" updated!\n", singleUpdatedName)
-	}
-	return nil
 }