[jira] [Created] (MCOMPILER-397) Use relative paths in jpms.args to make the builds reproducible

["Emmanuel Bourg (Jira)" <ji...@apache.org>]

Emmanuel Bourg created MCOMPILER-397:
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             Summary: Use relative paths in jpms.args to make the builds reproducible
                 Key: MCOMPILER-397
                 URL: https://issues.apache.org/jira/browse/MCOMPILER-397
             Project: Maven Compiler Plugin
          Issue Type: Improvement
    Affects Versions: 3.8.1
            Reporter: Emmanuel Bourg


The {{jpms.args}} file generated since the version 3.7 contains absolute paths, for example here is the file generated for jaxb-core:

{code}
--add-modules
java.xml.bind
--upgrade-module-path
/home/ebourg/jaxb/jaxb-ri/core/target/endorsed
{code}

The absolute path affects the reproducibility of the builds. Someone else rebuilding the project is unlikely to have the same base path and will not get a byte identical artifact. I suggest using a relative path instead (starting at the root of the project or at the root of the module) and normalizing the path separators (such that builds on Windows and Unix generate the same file).





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