Format Code

To automatically format the code, clang-format is a good choice.

Code Style

Doris Code Style is based on Google’s, makes a few changes. The customized .clang-format file is in the root dir of Doris. Now, .clang-format file only works on clang-format-8.0.1+.

Preparing

You should install clang-format, or you can use clang-format plugins which support by IDEs or Editors.

Install clang-format

Ubuntu: apt-get install clang-format

The current release is 10.0, you can specify old version, e.g.

apt-get install clang-format-9

Centos 7:

The version of clang-format installed by yum is too old. Compiling clang from source is recommended.

Clang-format plugins

Clion IDE supports the plugin “ClangFormat”, you can search in File->Setting->Plugins and download it. But the version is not match with clang-format. Judging from the options supported, the version is lower than clang-format-9.0.

Usage

CMD

clang-format --style=file -i $File$

When using -style=file, clang-format for each input file will try to find the .clang-format file located in the closest parent directory of the input file. When the standard input is used, the search is started from the current directory.

Note: filter out the files which should not be formatted, when batch clang-formating files.

A example of how to filter *.h/*.cpp and exclude some dirs:

find . -type f -not \( -wholename ./env/* \) -regextype posix-egrep -regex ".*\.(cpp|h)" | xargs clang-format -i -style=file

Using clang-format in IDEs or Editors

Clion

If using the plugin ‘ClangFormat’ in Clion, choose Reformat Code or press the keyboard shortcut.

VS Code

VS Code needs install the extension ‘Clang-Format’, and specify the executable path of clang-format in settings.

  1. "clang-format.executable":  "$clang-format path$",
  2. "clang-format.style": "file"

Then, choose Format Document.