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From "Daniel Spiewak (JIRA)" <>
Subject [jira] Commented: (BUILDR-229) Improve Scala Source Change Detection
Date Thu, 19 Feb 2009 16:42:02 GMT


Daniel Spiewak commented on BUILDR-229:

David MacIver has added some experimental support for this into the mainline Scala compiler.
 Thus, Buildr should get this for free once Scala 2.8.0 is released.  Closing issue.

> Improve Scala Source Change Detection
> -------------------------------------
>                 Key: BUILDR-229
>                 URL:
>             Project: Buildr
>          Issue Type: New Feature
>          Components: Compilers
>    Affects Versions: 1.4
>            Reporter: Daniel Spiewak
>            Priority: Minor
> To my knowledge, Buildr currently bases its decision on which Scala files to compile
based on simple file change heuristics (modified timestamp).  Because Scala produces such
a massive number of .class files, this can sometimes lead to longer-than-necessary compilation
times.  SBT (simple-build-tool) contains a rather innovative feature which actually bundles
a Scala compiler plugin to optimize these recompilation heuristics.  Specifically:
> I'm not entirely clear yet on how it works, but it seems like it would do much to improve
Buildr's rather-lengthy Scala build times.

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