From a3a6503982694f5dc88d9dd85e14d732e2324ec4 Mon Sep 17 00:00:00 2001
From: Yibing Liu <liuyibing01@baidu.com>
Date: Fri, 8 Sep 2017 19:00:26 +0800
Subject: [PATCH] add clang-format hook

---
 .clang-format           | 29 +++++++++++++++++++++++++++++
 .clang_format.hook      |  5 +++++
 .pre-commit-config.yaml |  8 ++++++++
 3 files changed, 42 insertions(+)
 create mode 100644 .clang-format
 create mode 100755 .clang_format.hook

diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000000..30863c27a8
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,29 @@
+# This file is used by clang-format to autoformat paddle source code
+#
+# The clang-format is part of llvm toolchain.
+# It need to install llvm and clang to format source code style.
+#
+# The basic usage is,
+#   clang-format -i -style=file PATH/TO/SOURCE/CODE
+#
+# The -style=file implicit use ".clang-format" file located in one of
+# parent directory.
+# The -i means inplace change.
+#
+# The document of clang-format is
+#   http://clang.llvm.org/docs/ClangFormat.html
+#   http://clang.llvm.org/docs/ClangFormatStyleOptions.html
+---
+Language:        Cpp
+BasedOnStyle:  Google
+IndentWidth:     2
+TabWidth:        2
+ContinuationIndentWidth: 4
+MaxEmptyLinesToKeep: 2
+AccessModifierOffset: -2  # The private/protected/public has no indent in class
+Standard:  Cpp11
+AllowAllParametersOfDeclarationOnNextLine: true
+BinPackParameters: false
+BinPackArguments: false
+...
+
diff --git a/.clang_format.hook b/.clang_format.hook
new file mode 100755
index 0000000000..9db4fe4550
--- /dev/null
+++ b/.clang_format.hook
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+# clang-format hook without version check
+
+clang-format $@
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 5ed1f4c4be..8ff36e098b 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -25,6 +25,14 @@
         files: \.md$
     -   id: remove-tabs
         files: \.md$
+-   repo: local
+    hooks:
+    -   id: clang-format
+        name: clang-format
+        description: Format files with ClangFormat
+        entry: bash .clang_format.hook -i
+        language: system
+        files: \.(c|cc|cxx|cpp|cu|h|hpp|hxx|cuh|proto)$
 -   repo: local
     hooks:
     -   id: convert-markdown-into-html