On Wed, 3 Nov 2010 20:58:05 -0400
Tom Horsley wrote:
> deplist is looking the most promising so far.
It isn't fast, but it seems to work. I whipped out a
little "find-roots" perl script to do the job:
#!/usr/bin/perl -w
#
# Long running script to find all the deps of all the packages
# then find all the installed rpms that are not deps of anything.
#
use strict;
my %rpms;
my $fh;
# This is the bit that takes forever to run, and it also (apparently)
# describes every package in every repo that might provide a dependency,
# so the list this generates is about 10 times larger than the actual
# installed base.
open($fh, '-|', 'yum', 'deplist', '*');
while (<$fh>) {
if (/^\s*provider:\s*(\S+)\s*\S+\s*$/) {
$rpms{$1} = 1;
}
}
close($fh);
undef($fh);
# Getting the list of actual installed rpms is much less time consuming.
my %installed;
open($fh, '-|', 'rpm', '-q', '--qf', '%{NAME}.%{ARCH}\n', '-a');
while (<$fh>) {
chomp;
$installed{$_} = 1;
}
close($fh);
undef($fh);
# Now we print all the rpms that are installed, but which do not show
# up as a provider of any dependency.
foreach $_ (sort(keys(%installed))) {
if (! exists($rpms{$_})) {
print "$_\n";
}
}
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