2 files changed, 31 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 75f519a1d..6805ebed8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,6 +4,13 @@ cmake_minimum_required(VERSION 2.8.11)
 
 project(citra)
 
+if(NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/.git/hooks/pre-commit)
+    message(STATUS "Copying pre-commit hook")
+    file(COPY hooks/pre-commit
+        DESTINATION ${CMAKE_CURRENT_SOURCE_DIR}/.git/hooks
+        FILE_PERMISSIONS WORLD_EXECUTE )
+endif()
+
 if (NOT MSVC)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wno-attributes -pthread")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -pthread")
diff --git a/hooks/pre-commit b/hooks/pre-commit
new file mode 100644
index 000000000..bad84b14b
--- /dev/null
+++ b/hooks/pre-commit
@@ -0,0 +1,24 @@
+#!/bin/sh
+
+# Enforce citra's whitespace policy
+git config --local core.whitespace tab-in-indent,trailing-space
+
+# If there are whitespace errors, print the offending file names and fail.
+if ! git diff --cached --check; then
+    cat<<END;
+
+Error: This commit would contain trailing spaces or tabs, which is against this repo's policy.
+Please correct those issues before commiting. (Use 'git diff --check' for more details)
+If you know what you are doing, you can try 'git commit --no-verify' to bypass the check
+END
+    exit 1
+fi
+
+# Check for tabs, since tab-in-indent catches only those at the beginning of a line
+if git diff --cached | egrep '^\+.*     '; then
+    cat<<END;
+Error: This commit would contain a tab, which is against this repo's policy.
+If you know what you are doing, you can try 'git commit --no-verify' to bypass the check.
+END
+    exit 1
+fi