From d4f3f91509f3e2461ff0dd9d3a904a5605dee499 Mon Sep 17 00:00:00 2001
From: Lars Melchior <TheLartians@users.noreply.github.com>
Date: Tue, 9 Apr 2019 16:35:15 +0200
Subject: [PATCH] Update README.md

---
 README.md | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index f0cd250..ce2e63f 100644
--- a/README.md
+++ b/README.md
@@ -2,11 +2,11 @@
 
 # CPM
 
-CPM is a very simple package manager written in Cmake. It is extremely easy to use and drastically simplifies the inclusion of other Cmake-based projects from github.
+CPM is a very simple package manager written in Cmake based on the amazing [DownloadProject](https://github.com/Crascit/DownloadProject) script. It is extremely easy to use and drastically simplifies the inclusion of other Cmake-based projects from github.
 
 # Usage
 
-To add a new dependency to your project simply add the Projects target name, the git URL and a valid git tag or branch. 
+To add a new dependency to your project simply add the Projects target name, the git URL and the version. If the git tag for this version does not match the pattern `v$VERSION`, then the exact branch or tag can be specified with the `GIT_TAG` argument.
 
 ```cmake
 cmake_minimum_required(VERSION 3.5 FATAL_ERROR)
@@ -20,6 +20,7 @@ CPMAddPackage(
   NAME LarsParser
   GIT_REPOSITORY https://github.com/TheLartians/Parser.git
   VERSION 1.2
+  GIT_TAG master # optional
 )
 
 # add executable
@@ -27,3 +28,7 @@ set (CMAKE_CXX_STANDARD 17)
 add_executable(my-parser my-parser.cpp)
 target_link_libraries(cpm-test LarsParser)
 ```
+
+# Current Limitations
+
+- First version used: in diamond dependency graphs (e.g. `A` depends on `C`(v1.1) and `A` depends on `B` depends on `C`(v1.2)) the first added dependency will be used (in this case `C`@1.1).