link CONTRIBUTING.md to the one in MMCV (#587)

* link CONTRIBUTION.md to the one in MMCV

* keep CONTRIBUTING.md

* keep CONTRIBUTING.md

* mention MMCV

.github/CONTRIBUTING.md

@@ -1,73 +1 @@
-# Contributing to MMAction2
-
-All kinds of contributions are welcome, including but not limited to the following.
-
-- Fixes (typo, bugs)
-- New features and components
-
-## Workflow
-
-1. fork and pull the latest mmaction2
-2. checkout a new branch (do not use master branch for PRs)
-3. commit your changes
-4. create a PR
-
-Note
-
-- If you plan to add some new features that involve large changes, it is encouraged to open an issue for discussion first.
-- If you are the author of some papers and would like to include your method to mmaction2,
-
-please contact Kai Chen (chenkaidev@gmail.com). We will much appreciate your contribution.
-
-## Code style
-
-### Python
-
-We adopt [PEP8](https://www.python.org/dev/peps/pep-0008/) as the preferred code style.
-
-We use the following tools for linting and formatting:
-
-- [flake8](http://flake8.pycqa.org/en/latest/): linter
-- [yapf](https://github.com/google/yapf): formatter
-- [isort](https://github.com/timothycrosley/isort): sort imports
-
-Style configurations of yapf and isort can be found in [setup.cfg](../setup.cfg).
-
-We use [pre-commit hook](https://pre-commit.com/) that checks and formats for `flake8`, `yapf`, `isort`, `trailing whitespaces`,
- fixes `end-of-files`, sorts `requirments.txt` automatically on every commit.
-The config for a pre-commit hook is stored in [.pre-commit-config](../.pre-commit-config.yaml).
-
-After you clone the repository, you will need to install initialize pre-commit hook.
-
-```
-pip install -U pre-commit
-```
-
-From the repository folder
-
-```
-pre-commit install
-```
-
-If you are facing an issue when installing markdown lint, you may install ruby for markdown lint by
-referring to [this repo](https://github.com/innerlee/setup) by following the usage and taking [`zzruby.sh`](https://github.com/innerlee/setup/blob/master/zzruby.sh)
-
-or by the following steps
-
-```shell
-# install rvm
-curl -L https://get.rvm.io | bash -s -- --autolibs=read-fail
-[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm"
-rvm autolibs disable
-
-# install ruby
-rvm install 2.7.1
-```
-
-After this on every commit check code linters and formatter will be enforced.
-
->Before you create a PR, make sure that your code lints and is formatted by yapf.
-
-### C++ and CUDA
-
-We follow the [Google C++ Style Guide](https://google.github.io/styleguide/cppguide.html).
+We appreciate all contributions to improve MMAction2. Please refer to [CONTRIBUTING.md](https://github.com/open-mmlab/mmcv/blob/master/CONTRIBUTING.md) in MMCV for more details about the contributing guideline.

README.md

@@ -202,7 +202,7 @@ If you find this project useful in your research, please consider cite:
 
 ## Contributing
 
-We appreciate all contributions to improve MMAction2. Please refer to [CONTRIBUTING.md](.github/CONTRIBUTING.md) for the contributing guideline.
+We appreciate all contributions to improve MMAction2. Please refer to [CONTRIBUTING.md](https://github.com/open-mmlab/mmcv/blob/master/CONTRIBUTING.md) in MMCV for more details about the contributing guideline.
 
 ## Acknowledgement