diff --git a/source/dub/package_.d b/source/dub/package_.d
index 32d72c5..1c4105f 100644
--- a/source/dub/package_.d
+++ b/source/dub/package_.d
@@ -47,17 +47,17 @@
 /// 
 /// Json file example:
 /// {
-/// 		"name": "MetalCollection",
-/// 		"author": "VariousArtists",
-/// 		"version": "1.0.0",
+/// 	"name": "MetalCollection",
+/// 	"author": "VariousArtists",
+/// 	"version": "1.0.0",
 ///		"url": "https://github.org/...",
 ///		"keywords": "a,b,c",
 ///		"category": "music.best",
-/// 		"dependencies": {
-/// 			"black-sabbath": ">=1.0.0",
-/// 			"CowboysFromHell": "<1.0.0",
-/// 			"BeneathTheRemains": {"version": "0.4.1", "path": "./beneath-0.4.1"}
-/// 		}
+/// 	"dependencies": {
+/// 		"black-sabbath": ">=1.0.0",
+/// 		"CowboysFromHell": "<1.0.0",
+/// 		"BeneathTheRemains": {"version": "0.4.1", "path": "./beneath-0.4.1"}
+/// 	}
 ///		"licenses": {
 ///			...
 ///		}
diff --git a/source/dub/packagemanager.d b/source/dub/packagemanager.d
index 71aa3d6..62cf0a0 100644
--- a/source/dub/packagemanager.d
+++ b/source/dub/packagemanager.d
@@ -12,8 +12,9 @@
 import dub.package_;
 import dub.utils;
 
-import std.algorithm : countUntil, filter, sort;
+import std.algorithm : countUntil, filter, sort, canFind;
 import std.conv;
+import std.digest.sha;
 import std.exception;
 import std.file;
 import std.string;
@@ -482,6 +483,36 @@
 		scanLocalPackages(m_userPackagePath, m_localUserPackages);
 	}
 
+	alias ubyte[] Hash;
+	/// Generates a hash value for a given package.
+	/// Some files or folders are ignored during the generation (like .dub and
+	/// .svn folders)
+	Hash hashPackage(Package pack) 
+	{
+		string[] ignored_directories = [".git", ".dub", ".svn"];
+		// something from .dub_ignore or what?
+		string[] ignored_files = [];
+		SHA1 sha1;
+		foreach(file; dirEntries(pack.path.toNativeString(), SpanMode.depth)) {
+			if(file.isDir && ignored_directories.canFind(Path(file.name).head.toString()))
+				continue;
+			else if(ignored_files.canFind(Path(file.name).head.toString()))
+				continue;
+
+			sha1.put(cast(ubyte[])Path(file.name).head.toString());
+			if(file.isDir) {
+				logTrace("Hashed directory name %s", Path(file.name).head);
+			}
+			else {
+				sha1.put(openFile(Path(file.name)).readAll());
+				logTrace("Hashed file contents from %s", Path(file.name).head);
+			}
+		}
+		auto hash = sha1.finish();
+		logTrace("Project hash: %s", hash);
+		return hash[0..$];
+	}
+
 	private Package[]* getLocalPackageList(LocalPackageType type)
 	{
 		final switch(type){