generate version data for root package

Author: kostiakoval

Sources/Get/Package.swift

@@ -19,7 +19,9 @@ extension Package {
         guard let origin = repo.origin else { throw Error.NoOrigin(repo.path) }
         let manifest = try manifestParser(path: repo.path, url: origin)
         let pkg = Package(manifest: manifest, url: origin)
-        pkg.version = Version(pkg.versionString)!
+        if let version = Version(pkg.versionString) {
+            pkg.version = version
+        }
         guard Version(pkg.versionString) != nil else { return nil }
         return pkg
     }

Sources/Get/get().swift

@@ -23,7 +23,10 @@ public func get(manifest: Manifest, manifestParser: (path: String, url: String)
 
     //TODO don't lose the dependency information during the Fetcher process!
 
-    let pkgs = try box.recursivelyFetch(manifest.dependencies) + [Package(manifest: manifest, url: manifest.path.parentDirectory)]
+    let rootPkg = Package(manifest: manifest, url: manifest.path.parentDirectory)
+    rootPkg.version = Git.Repo(path: rootPkg.path)?.versions.last
+
+    let pkgs = try box.recursivelyFetch(manifest.dependencies) + [rootPkg]
     for pkg in pkgs {
         pkg.dependencies = pkg.manifest.package.dependencies.map{ dep in pkgs.pick{ dep.url == $0.url }! }
     }