[gentoo-amd64] Re: GCC upgrade script

[Duncan <1i5t5.duncan@cox.net>]

"Mark Haney" <mhaney@ercbroadband.org> posted
462E2157.5050606@ercbroadband.org, excerpted below, on  Tue, 24 Apr 2007
11:25:11 -0400:

> A while back, someone posted a command that I think pulled all the info
> from 'emerge -eav world' into a nice neat package so that a GCC upgrade
> can be done in smaller increments.  Now, however, I can't seem to find
> it in the archives, or in my stored list backup.  Can someone throw me a
> copy of that post or point me to the right one online?

emerge -pe world|grep /|cut -f2 -d"]"|sed "s/^ /=/"

That'll give you a list of packages, with the versions, preceded by "=" 
for each one, so emerge will give you exactly the same versions.  You can 
redirect it to a file as necessary.

If you want it without versions, so as to emerge the latest, it gets 
somewhat hairier, because the version strings are somewhat difficult to 
automatically delete without error.  I usually just take the lazy way 
out, replacing that sed above with another cut, as so:

emerge -pe world|grep /|cut -f2 -d"]"|cut -f2 -d" "

That still leaves the versions.  Then I open the redirect file in my 
favorite editor and use search and replace with prompt, playing with the 
search pattern and repeating until I get what I want.  A regex pattern of 
-[-abcr.0-9]*$, replaced with <nothing> gets most of it, but leaves 
strings such as -alpha and -beta, which are easy enough to remove on 
either further searches or manually.  Of course, it's possible to include 
those in the regex search pattern as well, and would be possible to then 
make that a sed command, but it's difficult to get exactly right, then 
remember, and easy enough to do in a decent editor, so that's what I do.

-- 
Duncan - List replies preferred.   No HTML msgs.
"Every nonfree program has a lord, a master --
and if you use the program, he is your master."  Richard Stallman

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