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Posted to common-issues@hadoop.apache.org by "Andrew Wang (JIRA)" <ji...@apache.org> on 2015/07/07 01:15:07 UTC

[jira] [Updated] (HADOOP-12194) Support for incremental generation in the protoc plugin

     [ https://issues.apache.org/jira/browse/HADOOP-12194?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Wang updated HADOOP-12194:
---------------------------------
    Attachment: hadoop-12194.001.patch

Patch attached. Saves a json file with CRC32 checksums in the build directory, and skips protoc generation if they match. I tested by running {{mvn -X compile}} twice, seeing the "Stale source" logs going way down, then modifying a proto file and seeing it recompile.

Would appreciate some similar testing from reviewers.

Between this and HADOOP-12193, we're much closer to a working incremental build, at least for some modules.

> Support for incremental generation in the protoc plugin
> -------------------------------------------------------
>
>                 Key: HADOOP-12194
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12194
>             Project: Hadoop Common
>          Issue Type: Improvement
>    Affects Versions: 2.0.6-alpha
>            Reporter: Andrew Wang
>            Assignee: Andrew Wang
>         Attachments: hadoop-12194.001.patch
>
>
> The protoc maven plugin currently generates new Java classes every time, which means Maven always picks up changed files in the build. It would be better if the protoc plugin only generated new Java classes when the source protoc files change.



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