PropertiesFileTransformer break reproducible builds

[chrko]

Shadow Version

6.0.0

Gradle Version

6.5.1

Expected Behavior

Reproducible build = hash of resulting file within build/lib

Actual Behavior

The PropertiesFileTransformer writes the current time into the generated files which breaks the reproducible build.

Gradle Build Script(s)

I'm currently trying to build a fat application jar with spring dependencies and applying the following: spring-projects/spring-boot#1828 (comment)

shadowJar {
    mergeServiceFiles()
    transform(PropertiesFileTransformer) {
        paths = [
                'META-INF/spring.handlers',
                'META-INF/spring.factories',
                'META-INF/spring.schemas',
                'META-INF/spring.tooling',
        ]
        mergeStrategy = "latest"
    }
}

I will try to reduce my current build.gradle to ease reproduction and will append this.

Content of Shadow JAR (jar tf <jar file> - post link to GIST if too long)

…
META-INF/services/org.apache.logging.log4j.util.PropertySource
META-INF/spring.handlers
META-INF/spring.schemas
META-INF/spring.tooling
META-INF/spring.factories

Content of spring.factories:

#
#Tue Jun 30 22:03:02 CEST 2020
org.springframework.beans.BeanInfoFactory=org.springframework.beans.ExtendedBeanInfoFactory

[crafton]

@chrko Did you find a way around this?

[ahmed-anas]

facing this issue. any workaround?

[gergogera]

This happens because PropertiesFileTransformer is using Properties.store method which will add the timestamp anyways. Would be nice to change this so that the unnecessary time comment is removed instead.

[k-brooks]

I believe the intent of #622 was to address this issue.
EDIT
A version override masked the fix, this is now working for me.

[johnrengelman]

Introduced CleanProperties in 8 or 8.1.
This shoudl work now.