From 64690d1a3017d37f2be36d8fea72d4da88fa8a19 Mon Sep 17 00:00:00 2001
From: Axel Isouard <axel@isouard.fr>
Date: Sun, 19 Mar 2017 18:55:36 +0100
Subject: [PATCH] Define WEBRTC_BRANCH_HEAD and WEBRTC_REVISION when required

---
 CMakeLists.txt | 28 ++++++++++++++++++----------
 1 file changed, 18 insertions(+), 10 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4fb8d99..5f9f0a5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -50,6 +50,23 @@ if (NOT HAS_OWN_DEPOT_TOOLS)
   set(DEPOT_TOOLS_PATH ${CMAKE_BINARY_DIR}/depot_tools/src/depot-tools)
 endif (NOT HAS_OWN_DEPOT_TOOLS)
 
+set(_WEBRTC_CMAKE_ARGS
+    -DDEPOT_TOOLS_PATH:PATH=${DEPOT_TOOLS_PATH}
+    -DGCLIENT_EXECUTABLE:PATH=${GCLIENT_EXECUTABLE}
+    -DHAS_OWN_DEPOT_TOOLS:PATH=${HAS_OWN_DEPOT_TOOLS}
+    -DCMAKE_MODULE_PATH:PATH=${CMAKE_MODULE_PATH}
+    -DTARGET_CPU=${TARGET_CPU}
+    -DTARGET_OS=${TARGET_OS}
+    -DWEBRTC_PARENT_DIR:PATH=${CMAKE_BINARY_DIR}/webrtc)
+
+if (WEBRTC_BRANCH_HEAD)
+  set(_WEBRTC_CMAKE_ARGS ${_WEBRTC_CMAKE_ARGS} -DWEBRTC_BRANCH_HEAD=${WEBRTC_BRANCH_HEAD})
+endif (WEBRTC_BRANCH_HEAD)
+
+if (WEBRTC_REVISION)
+  set(_WEBRTC_CMAKE_ARGS ${_WEBRTC_CMAKE_ARGS} -DWEBRTC_REVISION=${WEBRTC_REVISION})
+endif (WEBRTC_REVISION)
+
 ExternalProject_Add(
     webrtc-src
 
@@ -68,16 +85,7 @@ ExternalProject_Add(
     INSTALL_COMMAND ""
 
     CMAKE_ARGS
-    -DDEPOT_TOOLS_PATH:PATH=${DEPOT_TOOLS_PATH}
-    -DGCLIENT_EXECUTABLE:PATH=${GCLIENT_EXECUTABLE}
-    -DHAS_OWN_DEPOT_TOOLS:PATH=${HAS_OWN_DEPOT_TOOLS}
-    -DCMAKE_MODULE_PATH:PATH=${CMAKE_MODULE_PATH}
-    -DTARGET_CPU=${TARGET_CPU}
-    -DTARGET_OS=${TARGET_OS}
-    -DWEBRTC_BRANCH_HEAD=${WEBRTC_BRANCH_HEAD}
-    -DWEBRTC_PARENT_DIR:PATH=${CMAKE_BINARY_DIR}/webrtc
-    -DWEBRTC_REVISION=${WEBRTC_REVISION}
-    -DWEBRTC_ROOT_DIR:PATH=${CMAKE_BINARY_DIR}
+    ${_WEBRTC_CMAKE_ARGS}
 )
 
 if (MSVC OR XCODE)