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Update 'non-ros-files/Programming_Rules.md'

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winterhalderp 2021-04-19 17:22:29 +02:00
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non-ros-files/Programming_Rules.md
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## File Structure
```
colcon_workspace
|
|- build
|- install
|- src
|
|- build (holds build files)
|- install (holds build elements)
|- src (contains your source code - this is where you work)
```
## Colcon build
Performing a `colcon build` is neccessary after every change to the `src` directory. This must be performed in the `root` of the _colcon_ workspace (eg. `cd ~/colcon_ws`).
In order to avoid this procedure after every change made to a Python script you must run `colcon build --symlink-install` once. This links the files created in `/build` and `/install` to your source files in `/src`. However, after creating a new Python script this procedure must be repeated in order to also link this new script.
## Source directory
The source directory holds your ROS2 packages as further directories. In this example the `src` directory contains the packages `pubsub` and `pubsub_msg`:
```
colcon_workspace/
|
|- src/
|
|- pubsub/
|- pubsub_msg/
```