Generated Java source should be annotated with @Generated

[dimo414]

Generated Java source code should be annotated with @Generated to aid static analysis and tooling. For example Error-Prone will ignore errors in @Generated code.

As a workaround presently I have a pre-compilation step that adds the annotation manually, but ideally the protoc compiler would do this for me.

<!-- based on http://stackoverflow.com/a/5941279/113632 -->
<replaceregexp match="public(.*) class" replace="@javax.annotation.Generated(&quot;protoc&quot;) \0">
  <fileset dir="${proto.src}" includes="**/*.java" />
</replaceregexp>

[madrob]

Duplicate of #42 ?