xdev-software
Rider/C# - Formatting actions have no effect
Checklist
- [x] I am able to reproduce the bug with the latest version
- [x] I made sure that there are no existing issues - open or closed - which I could contribute my information to.
- [x] I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
- [x] This issue contains only one bug.
Affected version
save-actions 1.5.0，Rider 2025.2.0.1
Description of the problem
The file is saved but not formatted with Save All.
Steps to reproduce the bug
Settings are as follows,
Additional information
No response
Thank you for the issue, I can reproduce the problem with Rider.
So the problem here is that in https://github.com/JetBrains/intellij-community/blob/64124b0ee1ab4cab228051dcbd4455eef2097464/platform/lang-impl/src/com/intellij/codeInsight/actions/AbstractLayoutCodeProcessor.java#L339 LanguageFormatting.INSTANCE.forContext(psiFile) always returns null for C#.
It looks like there is a problem with Rider's definition of C# as it's not registered as a language inside the IDE?
There are no extension points for C# in com.intellij.lang.formatter and com.intellij.metaLanguage.
Also running Reformat code (Ctrl + Alt + L) in Rider does not trigger the ReformatCodeProcessor.
There is also no Reformat code action present in Actions on Save just a custom one called Reformat code and cleanup:
Rider source code is also not publicly available (and written in Kotlin so I can't decompile it properly), so it's kind of hard to say what's going on in there...
The other formatting options like Optimize imports and Rearrange fields... also don't seem to work...
I reported the problem to JetBrains: https://youtrack.jetbrains.com/issue/RIDER-129474