> For the complete documentation index, see [llms.txt](https://b-it-bots.gitbook.io/wiki/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://b-it-bots.gitbook.io/wiki/home/_conventions/ros/linters.md).

# Linting

## Running `roslint` with catkin

Before merging into the main repository `roslint` is ran on all merge requests. Unless all errors are resolved the merge request will be rejected. To test if your changes would pass the `roslint` test locally:

* Add the following lines to your `CMakelists.txt`:

```
find_package(catkin REQUIRED COMPONENTS roslint ...)

roslint_python()  # pep8 linting
roslint_cpp()     # ROS wrapper of Google's cpplint
```

Your `package.xml` should include `roslint` as a build dependency:

```markup
<build_depend>roslint</build_depend>
```

* Build target `roslint`:
  * with `catkin_make`: `catkin_make roslint_<package_name>`
  * with `catkin_tools`: `catkin build --no-deps <package_name> --make-args roslint_<package_name>`
* If build fail copy and execute the gray line that looks something like the following to see more detailed errors:

```
cd <package_source_directory>; catkin build --get-env <package_name> | catkin env -si  /usr/bin/make roslint --jobserver-fds=6,7 -j; cd -
```

![2017-05-06-205659\_900x152\_scrot](https://3442986010-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-Legv9tF01oE_ZuKIK_3%2F-LegvPYuXY3HslHipH7A%2F-LegvUgJtUHJKrzKG6iM%2F2017-05-06-205659_900x152_scrot.png?generation=1557679447804464\&alt=media)

## Running `catkin_lint`

You should also make sure that the `catkin_lint` tests pass; running it from the root of your catkin workspace you can run:

```
catkin_lint --strict --ignore CRITICAL_VAR_APPEND,LINK_DIRECTORY src/mas_domestic_robotics
```

## See Also

* [roslint](http://wiki.ros.org/roslint)
* [catkin\_lint](http://fkie.github.io/catkin_lint/)

Proposed linters:

* [C++](http://clang.llvm.org/extra/clang-tidy/)
* [Python](https://pypi.python.org/pypi/pep8)
* [ROS](http://wiki.ros.org/roslint)