Re-emerge all ebuilds with missing files (Gentoo Linux)

emerge -av1 `qlist --installed --nocolor | uniq | while read cp; do qlist --exact $cp | while read file; do test -e $file || { echo $cp; echo "$cp: missing $file (and maybe more)" 1>&2; break; }; done; done`
Revised approach to and3k's version, using pipes and read rather than command substitution. This does not require fiddling with IFS when paths have whitespace, and does not risk hitting command-line size limits. It's less verbose on the missing files, but it stops iterating at the first file that's missing, so it should be definitely faster. I expanded all the qlist options to be more self-describing.

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What Others Think

And actually both can be made pointless if qcheck gains a --noperm option (right now it can ignore missing files, differing checksums and differing mtimes.. if we're to just list missing files we cannot). I guess I could do that.
Flameeyes · 428 weeks and 1 day ago
Ah actually the PERM output is not verifying permissions (that we actually are *not* storing and this surprise the hack out of me) but rather telling me it has no permission to open the file as user... As root emerge -av1 $(qcheck -aHTB)
Flameeyes · 428 weeks and 1 day ago

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Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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