eapply_user: combine sort for all dirs (bug 608880) #186
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Combine the patch basenames from all matched directories into a
list, and apply them in POSIX sorted order. This allows patches in
more-specific directories to override patches of the same basename found
in less-specific directories. An empty patch (or /dev/null symlink)
negates a patch with the same basename found in a less-specific
directory.
This behavior is much more flexible and intuitive than the previous one,
while remaining backward-compatible to some extent.
NOTE: The implementation uses an associative array, which requires bash
version 4 or later.
X-Gentoo-bug: 608880
X-Gentoo-bug-url: https://bugs.gentoo.org/608880