[gentoo-portage-dev] future restrictions to DISTDIR access from the ebuild env

[gentoo-portage-dev] future restrictions to DISTDIR access from the ebuild env

[Brian Harring]

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Hola all.

robbat2 made the suggestion, and after a bit of playing I think it's 
best- in short, to support multiple DISTDIR's, we need either 
intelligent querying of portage from bash side as to a files true 
location, or a directory full of symlinks pointing at the ebuild's 
stated files.

Latter is easiest imo, and a bit cleaner for a dev to be able to look 
at it and see why things are breaking; upshot, adding this indirection 
allows portage (with sane fetcher(s)) to do N DISTDIR, and it also 
causes any ebuild that has unstated SRC_URI deps to bail.

The forced bail pretty much makes it so that an ebuild dev can't 
easily screw up, they hit the unpack failure rather then a commit and 
a user hitting it.

If you've got issues with it, give a yell; just added this in the 
rewrite.
~harring

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