Refactor implementations of get and list commands

- Simplify the main functions by moving actual implementation to "pkg" package
- Remove the "path" package and move files into the root "pkg" package
- Replace viper with explicit Cfg structs

pkg/get.go

@@ -0,0 +1,58 @@
+package pkg
+
+import (
+	"git-get/pkg/repo"
+	"path"
+)
+
+// GetCfg provides configuration for the Get command.
+type GetCfg struct {
+	Branch string
+	Dump   string
+	Root   string
+	URL    string
+}
+
+// Get executes the "git get" command.
+func Get(c *GetCfg) error {
+	if c.Dump != "" {
+		return cloneDumpFile(c)
+	}
+
+	if c.URL != "" {
+		return cloneSingleRepo(c)
+	}
+
+	return nil
+}
+
+func cloneSingleRepo(c *GetCfg) error {
+	url, err := ParseURL(c.URL)
+	if err != nil {
+		return err
+	}
+
+	cloneOpts := &repo.CloneOpts{
+		URL:    url,
+		Path:   path.Join(c.Root, URLToPath(url)),
+		Branch: c.Branch,
+	}
+
+	_, err = repo.Clone(cloneOpts)
+
+	return err
+}
+
+func cloneDumpFile(c *GetCfg) error {
+	opts, err := ParseBundleFile(c.Dump)
+	if err != nil {
+		return err
+	}
+
+	for _, opt := range opts {
+		path := path.Join(c.Root, URLToPath(opt.URL))
+		opt.Path = path
+		_, _ = repo.Clone(opt)
+	}
+	return nil
+}