From: "Kevin O'Gorman" <kogorman@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: [gentoo-user] bash wizardry needed: PATH and MANPATH grow and grow and grow
Date: Sun, 21 May 2006 15:56:38 -0700 [thread overview]
Message-ID: <9acccfe50605211556h542921a9kbd79da6a016e2101@mail.gmail.com> (raw)
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I have inherited some pretty gnarly dotfiles that I don't really want to
fool with too much,
but I'm also unhappy with what they do to my environment. They keep adding
the
same things over and over to some of the variables.
Does anyone know a nice little idiom for de-duping a colon-list like PATH or
MANPATH?
It has to retain one copy of each duplicate, preserving the order of *first*
appearances.
I know how to avoid duplicates when I do the coding myself:
case :$PATH: in
*:mynewthing:*) ;;
*) export PATH=$PATH:mynewthing
esac
I'm just not sure how best to turn the colon-list into something I can
iterate over.
Obviously, I use bash.
++ kevin
--
Kevin O'Gorman, PhD
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next reply other threads:[~2006-05-21 23:05 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-21 22:56 Kevin O'Gorman [this message]
2006-05-23 20:06 ` [gentoo-user] bash wizardry needed: PATH and MANPATH grow and grow and grow znx
2006-05-24 14:58 ` Kevin O'Gorman
2006-05-26 1:27 ` znx
2006-05-27 2:52 ` Kevin O'Gorman
2006-06-03 21:11 ` znx
2006-07-05 19:33 ` Boyd Stephen Smith Jr.
2006-07-07 18:31 ` Kevin O'Gorman
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