Store configuration file path as relative to the project root

[rock3r]

Right now, as of v1.17.1, the Detekt configuration path is stored as an absolute path. Given that the Detekt IJ plugin settings are per-project, and thus saved in .idea/detekt.xml, this prevents folks from sharing the Detekt plugin configuration with other devs by committing the .idea/detekt.xml file as that contains absolute paths which will only work for one user.

This would easily be solved by using relative paths instead, referred to the project root directory.

[BorzdeG]

used both 1.17.x and 1.18.0 (PR) - saved normally in the .idea/detekt.xml file:

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="DetektProjectConfiguration">
    <enableDetekt>true</enableDetekt>
    <buildUponDefaultConfig>true</buildUponDefaultConfig>
    <configPaths>$PROJECT_DIR$/detekt.yml</configPaths>
  </component>
</project>

There is only a problem with the file selector settings - it displays the full path to the file, not a relative. But at the same time saved relative path

[rock3r]

It saves them as absolute paths on my computer, but maybe it's because I used the file picker

[BorzdeG]

I also use the file selection dialog

[rock3r]

Hm it's the same I've done, but I'm on Windows. Maybe that's the difference

[rock3r]

I can confirm that the issue is that the IDE expects paths to be stored in POSIX format and will automatically relativize them only if they are in that format. I'm taking care of this as part of the work I am doing for #231 and the larger UI overhaul.