feat: configuration in toolbx.yaml

I renamed config.yaml to toolbx.yaml and now it's also loaded from home
directory ~/.toolbx.yaml. This will help with initialization of new
toolbx installation

README.md

@@ -17,4 +17,12 @@ any place.
 But for easy to use you should move the `toolbx` binary somewhere in your `PATH` 
 (e.g. to `/usr/local/bin`).
 
+## Quick Start
 
+When you installed `toolbx` binary, as second step is configuration of your 
+command repository. It's repository where are all commands and subcommands 
+defined. You can use `toolbx-demo` repository.
+
+```
+echo "repository: https://github.com/sn3d/toolbx-demo.git" > ~/.toolbx.yaml
+```

errors.go

@@ -10,4 +10,12 @@ var (
 	// NoMetadataError indicates the command.yaml is missing in the subcommand
 	// folder
 	NoMetadataError = errors.New("no metadata file")
+
+	// MissingRepoError indicates you have probably not configured toolbx. You should
+	// create configuration file and define Git repository where are commands
+	// defined:
+	//
+	//     echo "repository: https://github.com/sn3d/toolbx-demo.git" > ~/.toolbx.yaml
+	//
+	MissingRepoError = errors.New("no repository with commands defined")
 )

options.go

@@ -19,11 +19,17 @@ func defaultValues(instance *Toolbx) {
 
 func WithToolbxPath(toolbxpath string) ToolbxOption {
 	toolbxpath = toolbxPath(toolbxpath)
+	homeDir, _ := os.UserHomeDir()
 	return func(instance *Toolbx) {
 		instance.syncFile = filepath.Join(toolbxpath, "sync")
 		WithInstallationsDir(filepath.Join(toolbxpath, "installed"))(instance)
 		WithCommandsDir(filepath.Join(toolbxpath, "commands"))(instance)
-		WithConfigFile(filepath.Join(toolbxpath, "config.yaml"))(instance)
+
+		// The configuration is loaded in following order:
+		//    - ~/.toolbx.yaml
+		//    - $TOOLBX/toolbx.yaml
+		WithConfigFile(filepath.Join(homeDir, ".toolbx.yaml"))(instance)
+		WithConfigFile(filepath.Join(toolbxpath, "toolbx.yaml"))(instance)
 	}
 }
 

toolbx.go

@@ -51,6 +51,10 @@ func Create(options ...ToolbxOption) (*Toolbx, error) {
 	}
 
 	// validation & post-initialization
+	if toolbx.syncRepo == "" {
+		return nil, MissingRepoError
+	}
+
 	toolbx.installers = map[string]install.Installer{
 		"https+zip": archive.Installer(toolbx.gitlabToken),
 	}