I believe that this is done by checkstyle.
I found this on the checkstyle project:

https://github.com/checkstyle/checkstyle/issues/893

<module name="RegexpMultiline">
    <property name="format" value="\r\n"/>
    <property name="message" value="Do not use Windows line endings"/>
</module>

2015-06-10 8:41 GMT-03:00 Lukas Kubik <lkubik@redhat.com>:
Hi,

I'm sorry that this is a little bit off-topic question but I already asked in the forum and nobody answered me. How do you guys deal with the line endings unification in your github repo? I saw that you don't have for example .jsp files in the .gitattributes file however all .jsp files in the WF repo uses LF ending. How do you check that windows CRLF won't get merged with some PR?

We are currently discussing the unification of the line endings in the Keycloak repo so I would like to kindly ask you for any advice.


Thank you for the answer.
Regards,

Lukas
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Eduardo Sant'Ana da Silva - Dr.
Pesquisador / Consultor de TI