[MDEP-480] There should be an option to prevent files overwrite for unpack-dependencies and unpack

**[duongdeptrai](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=duongdeptrai)** opened **[MDEP-480](https://issues.apache.org/jira/browse/MDEP-480?redirect=false)** and commented

There should be an option to prevent file overwrite when extracting files.

This option is very helpful when unpack or unpack-dependencies happens after process-resouce phase.

Currently, there is overwriteRelease, overwriteSnapshot, overwriteIfNewer. But they all work on the artifact scope (that means decide if a whole artifact should overwrite), not files scope (if a file should overwrite an existing file).

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**Attachments:**
- [patch-maven-dependency-2.9-overwriteFiles.patch](https://issues.apache.org/jira/secure/attachment/12715042/patch-maven-dependency-2.9-overwriteFiles.patch) (_13.39 kB_)

3 votes, 6 watchers

Start by locating the unpack and unpack-dependencies extraction entry points and inspect how overwriteRelease, overwriteSnapshot, and overwriteIfNewer are applied. Compare the requested file-level behavior with the attached patch, then verify that an existing extracted file is preserved when the new option disables overwriting.

Written by the indexing model from the issue text.