Add pack-root option (fixes #27)

README.md

@@ -76,7 +76,8 @@ For use on servers, add the `-g` flag to disable the GUI and `-s server` to down
 
 ## Options
 - Additional options can be configured in the `[options]` section of `pack.toml`, as follows:
-    - `mods-folder` The folder to save mod metadata files into, for the install commands
+    - `mods-folder` The folder to save mod metadata files into, for the install commands (relative to the pack root)
     - `acceptable-game-versions` A list of additional Minecraft versions to accept when installing or updating mods
     - `no-internal-hashes` If this is set to true, packwiz will not generate hashes of local files, to prevent merge conflicts and inconsistent hashes when using git/etc.
         - `packwiz refresh --build` can be used in this mode to generate internal hashes for distributing the pack with packwiz-installer
+    - `pack-root` A custom directory, containing the modpack files and optional .packwizignore file (defaults to the index file location)

core/index.go

@@ -153,7 +153,8 @@ func (in *Index) updateFile(path string) error {
 	// If the file has an extension of toml and is in the mods folder, set mod to true
 	absFileDir, err := filepath.Abs(filepath.Dir(path))
 	if err == nil {
-		absModsDir, err := filepath.Abs(viper.GetString("mods-folder"))
+		modsDir := filepath.Join(in.GetPackRoot(), viper.GetString("mods-folder"))
+		absModsDir, err := filepath.Abs(modsDir)
 		if err == nil {
 			if absFileDir == absModsDir && strings.HasSuffix(filepath.Base(path), ".toml") {
 				mod = true
@@ -164,6 +165,14 @@ func (in *Index) updateFile(path string) error {
 	return in.updateFileHashGiven(path, "sha256", hashString, mod)
 }
 
+func (in Index) GetPackRoot() string {
+	packRoot := viper.GetString("pack-root")
+	if len(packRoot) == 0 {
+		packRoot = filepath.Dir(in.indexFile)
+	}
+	return packRoot
+}
+
 // Refresh updates the hashes of all the files in the index, and adds new files to the index
 func (in *Index) Refresh() error {
 	// TODO: If needed, multithreaded hashing
@@ -173,8 +182,7 @@ func (in *Index) Refresh() error {
 	pathPF, _ := filepath.Abs(viper.GetString("pack-file"))
 	pathIndex, _ := filepath.Abs(in.indexFile)
 
-	// TODO: A method of specifying pack root directory?
-	packRoot := filepath.Dir(viper.GetString("pack-file"))
+	packRoot := in.GetPackRoot()
 	ignoreExists := true
 	pathIgnore, _ := filepath.Abs(filepath.Join(packRoot, ".packwizignore"))
 	ignore, err := gitignore.NewFromFile(filepath.Join(packRoot, ".packwizignore"))

core/mod.go

@@ -71,8 +71,8 @@ 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) string {
-	m.metaFile = ResolveMod(metaName)
+func (m *Mod) SetMetaName(metaName string, index Index) string {
+	m.metaFile = ResolveMod(metaName, index)
 	return m.metaFile
 }
 

core/resolve.go

@@ -11,8 +11,9 @@ import (
 const ModExtension = ".toml"
 
 // ResolveMod returns the path to a mod file from it's name
-func ResolveMod(modName string) string {
+func ResolveMod(modName string, index Index) string {
 	// TODO: should this work for any metadata file?
 	fileName := strings.ToLower(strings.TrimSuffix(modName, ModExtension)) + ModExtension
-	return filepath.Join(viper.GetString("mods-folder"), fileName)
+	modsDir := filepath.Join(index.GetPackRoot(), viper.GetString("mods-folder"))
+	return filepath.Join(modsDir, fileName)
 }

curseforge/curseforge.go

@@ -187,7 +187,7 @@ func createModFile(modInfo modInfo, fileInfo modFileInfo, index *core.Index) err
 		},
 		Update: updateMap,
 	}
-	path := modMeta.SetMetaName(modInfo.Slug)
+	path := modMeta.SetMetaName(modInfo.Slug, *index)
 
 	// If the file already exists, this will overwrite it!!!
 	// TODO: Should this be improved?

curseforge/import.go

@@ -224,7 +224,8 @@ var importCmd = &cobra.Command{
 			}
 
 			// TODO: just use mods-folder directly? does texture pack importing affect this?
-			ref, err := filepath.Abs(filepath.Join(filepath.Dir(core.ResolveMod(modInfoValue.Slug)), fileInfo.FileName))
+			modFilePath := core.ResolveMod(modInfoValue.Slug, index)
+			ref, err := filepath.Abs(filepath.Join(filepath.Dir(modFilePath), fileInfo.FileName))
 			if err == nil {
 				referencedModPaths = append(referencedModPaths, ref)
 			}
@@ -243,9 +244,9 @@ var importCmd = &cobra.Command{
 		}
 
 		successes = 0
-		indexFolder := filepath.Dir(filepath.Join(filepath.Dir(viper.GetString("pack-file")), filepath.FromSlash(pack.Index.File)))
+		packRoot := index.GetPackRoot()
 		for _, v := range filesList {
-			filePath := filepath.Join(indexFolder, filepath.FromSlash(v.Name()))
+			filePath := filepath.Join(packRoot, filepath.FromSlash(v.Name()))
 			filePathAbs, err := filepath.Abs(filePath)
 			if err == nil {
 				found := false

modrinth/install.go

@@ -205,9 +205,9 @@ func installVersion(mod Mod, version Version, pack core.Pack) error {
 	}
 	var path string
 	if mod.Slug != "" {
-		path = modMeta.SetMetaName(mod.Slug)
+		path = modMeta.SetMetaName(mod.Slug, index)
 	} else {
-		path = modMeta.SetMetaName(mod.Title)
+		path = modMeta.SetMetaName(mod.Title, index)
 	}
 
 	// If the file already exists, this will overwrite it!!!