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Contribute Code

You are welcome to contribute to project Paddle Serving.

We sincerely appreciate your contribution. This document explains our workflow and work style.

Workflow

Paddle Serving uses this Git branching model. The following steps guide usual contributions.

  1. Fork

    Our development community has been growing fastly; it doesn't make sense for everyone to write into the official repo. So, please file Pull Requests from your fork. To make a fork, just head over to the GitHub page and click the "Fork" button.

  2. Clone

    To make a copy of your fork to your local computers, please run

    git clone https://github.com/your-github-account/Serving
cd Serving

  3. Create the local feature branch

    For daily works like adding a new feature or fixing a bug, please open your feature branch before coding:

    git checkout -b my-cool-stuff

  4. Commit

    Before issuing your first git commit command, please install pre-commit by running the following commands:

    pip install pre-commit
pre-commit install

    Our pre-commit configuration requires clang-format 3.8 for auto-formating C/C++ code and yapf for Python. At the same time, cpplint and pylint are required to check the code style of C/C++ and Python respectively. You may need to install cpplint and pylint by running the following commands:

    pip install cpplint pylint

    Once installed, pre-commit checks the style of code and documentation in every commit. We will see something like the following when you run git commit:

    $  git commit
CRLF end-lines remover...............................(no files to check)Skipped
yapf.....................................................................Passed
Check for added large files..............................................Passed
Check for merge conflicts................................................Passed
Check for broken symlinks................................................Passed
Detect Private Key...................................(no files to check)Skipped
Fix End of Files.........................................................Passed
clang-format.............................................................Passed
cpplint..................................................................Passed
pylint...................................................................Passed
copyright_checker........................................................Passed
[my-cool-stuff c703c041] add test file
 1 file changed, 0 insertions(+), 0 deletions(-)
 create mode 100644 233

    NOTE: The yapf installed by pip install pre-commit and conda install -c conda-forge pre-commit is slightly different. Paddle developers use pip install pre-commit.

  5. Build and test

    Users can build Paddle Serving natively on Linux, see the BUILD steps.

  6. Keep pulling

    An experienced Git user pulls from the official repo often -- daily or even hourly, so they notice conflicts with others work early, and it's easier to resolve smaller conflicts.

    git remote add upstream https://github.com/PaddlePaddle/Serving
git pull upstream develop

  7. Push and file a pull request

    You can "push" your local work into your forked repo:

    git push origin my-cool-stuff

    The push allows you to create a pull request, requesting owners of this official repo to pull your change into the official one.

    To create a pull request, please follow these steps.

    If your change is for fixing an issue, please write "Fixes " in the description section of your pull request. Github would close the issue when the owners merge your pull request.

    Please remember to specify some reviewers for your pull request. If you don't know who are the right ones, please follow Github's recommendation.

  8. Delete local and remote branches

    To keep your local workspace and your fork clean, you might want to remove merged branches:

    git push origin :my-cool-stuff
git checkout develop
git pull upstream develop
git branch -d my-cool-stuff

Code Review

  • Please feel free to ping your reviewers by sending them the URL of your pull request via IM or email. Please do this after your pull request passes the CI.

  • Please answer reviewers' every comment. If you are to follow the comment, please write "Done"; please give a reason otherwise.

  • If you don't want your reviewers to get overwhelmed by email notifications, you might reply their comments by in a batch.

  • Reduce the unnecessary commits. Some developers commit often. It is recommended to append a sequence of small changes into one commit by running git commit --amend instead of git commit.

Coding Standard

Code Style

Our C/C++ code follows the Google style guide.

Our Python code follows the PEP8 style guide.

Please install pre-commit, which automatically reformat the changes to C/C++ and Python code whenever we run git commit. To check the whole codebase, we can run the command pre-commit run -a, which is invoked by [our Travis CI configuration].

Unit Tests

Please remember to add related unit tests.

Writing Logs

We use glog for logging in our C/C++ code.

We use LOG() for general logging

LOG(INFO) << "Operator FC is taking " << num_inputs << "inputs."

When we run a Paddle Serving application or test, we can specify a logging level. For example:

GLOG_minloglevel=1 bin/serving

0 - INFO

1 - WARNING

2 - ERROR

3 - FATAL (Be careful as FATAL log will generate a coredump)