Hello,
I've been investigating why mvn install without clean doesn't work for my project. I've traced it down to using Dagger, though I think most (all?) code-generating annotation processors will be affected. I've created a simple project that reproduces the problem: https://github.com/marquiswang/incremental-compile-dagger-test The README describes exactly how it goes wrong. It basically means that if you are using Dagger, you always need to do a mvn clean install in order to successfully compile your code. I've got a slightly-hacky patch for IncrementalBuildHelper<https://github.com/apache/maven-shared-incremental/blob/master/src/main/java/org/apache/maven/shared/incremental/IncrementalBuildHelper.java> that I think is a pretty good way to solve the problem. Basically, we need to treat the generatedSourcesDirectory (by default target/generated-sources/annotations) the same as the outputDirectory and delete files from it when re-compiling during an incremental build. I'll share the patch as soon as I get permission from my employer, but it is pretty straightforward. Does this make sense? If so I can clean up the patch and convert it to a PR. Thanks, Marquis Wong Marquis Wong Software Engineer T +13122443368 E [email protected]<mailto:[email protected]> 233 South Wacker Drive # 4300, Chicago, Illinois 60606, US [IMC Logo]<https://www.imc.com/us/> [F]<https://www.facebook.com/IMCTrading> [t]<http://twitter.com/IMCTrading> [I]<https://www.instagram.com/imctrading/> [in]<https://www.linkedin.com/company/imc-financial-markets> imc.com<https://www.imc.com/us/> ________________________________ The information in this e-mail is intended only for the person or entity to which it is addressed. It may contain confidential and /or privileged material, the disclosure of which is prohibited. Any unauthorized copying, disclosure or distribution of the information in this email outside your company is strictly forbidden. If you are not the intended recipient (or have received this email in error), please contact the sender immediately and permanently delete all copies of this email and any attachments from your computer system and destroy any hard copies. Although the information in this email has been compiled with great care, neither IMC nor any of its related entities shall accept any responsibility for any errors, omissions or other inaccuracies in this information or for the consequences thereof, nor shall it be bound in any way by the contents of this e-mail or its attachments. Messages and attachments are scanned for all known viruses. Always scan attachments before opening them.
