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https://issues.apache.org/jira/browse/MCLEAN-79?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16223753#comment-16223753
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Matthew Ouyang commented on MCLEAN-79:
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I commonly run into issues when I am switching branches during development.
Here are some situations I am hoping to address.
* My starting branch has a new Java class A.java that the branch I switch to
does not have. Timestamp-based checks won't detect A.java is now gone and
delete A.class automatically, and if I don't do a clean then my jar will
include A.class and I have experienced cryptic errors later in the pipeline.
* The situation above is also applicable for moving resources from source to
target although the consequences are minimal.
* (more obscure) I'm trying to make an SDK compatible with Java 7, and I need
to remove new Java 8 features from a class. If the class was previously
compiled in Java 8, it would be nice to recompile this class under Java 7 and
timestamp checks won't be sufficient for this either. Without a clean, I'll
eventually run into the "unsupported major.minor version."
It won't be possible to handle every situation (e.g. multiple classes defined
in a single source file), but my main objective with this is to make a better
efforts towards avoid a {{clean}}.
> Partial Clean + Configurable Selectors
> --------------------------------------
>
> Key: MCLEAN-79
> URL: https://issues.apache.org/jira/browse/MCLEAN-79
> Project: Maven Clean Plugin
> Issue Type: New Feature
> Affects Versions: 3.0.0
> Reporter: Matthew Ouyang
> Labels: features
> Attachments: clean-partial.patch
>
>
> Partial cleanup would be useful in situations where source files are deleted
> or changing between feature branches (which also can result in deleted source
> files). This would eliminate the need to do a full clean.
> Looking for feedback on provided patch. To enable this, Selectors need to be
> configurable + some POC implementations (IdentitySelector, JavaSelector) have
> between provided. The patch also includes a page that describes the new
> feature in more detail, and Selectors have been placed in a separate package
> (now that there is more than one implementation).
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