[netvl]

This is not true for Maven and overall the general Java ecosystem. Your own build may have arbitrary logic, true (this holds for Maven, Gradle, SBT - virtually any build tool for JVM), but the artifacts which are distributed to consumers of libraries never have anything which gets automatically executed by the build process of the consumer. build.rs and equivalents, however, are a part of the package itself and are executed when the package is “depended on”.

[nextaccountic]

> but the artifacts which are distributed to consumers of libraries never have anything which gets automatically executed by the build process of the consumer

What if I build everything from source, including all libraries? (That is, do not consume any .jar files but build them myself). I would surely need to run the build step of every library right?