mirror of
https://github.com/xcat2/xcat-dep.git
synced 2024-11-25 02:50:10 +00:00
100 lines
3.0 KiB
Plaintext
100 lines
3.0 KiB
Plaintext
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#!/usr/bin/perl
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# Go thru the xcat-dep subdirs and replace sym links to an rpm with a sym link to
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# a later version of that rpm. Pass in the old rpm and new rpm file names.
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# Run this script at the top dir of xcat-dep.
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# Pass in -d to delete the link
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use strict;
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use Data::Dumper;
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use Getopt::Long;
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# check we are at the top level of xcat-dep
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if (! -d 'rh6' || ! -d 'sles11') { die "Error: it appears you are not running this script from the top directory of xcat-dep.\n"; }
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my $usage = sub {
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my $exitcode = shift @_;
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print "Usage: replacelinks {-?|-h|--help}\n";
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print "Usage: replacelinks [-v|--verbose] <remove-rpm> <add-rpm>\n";
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print "Usage: replacelinks --delete [-v|--verbose] <remove-rpm>\n";
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print "Usage: replacelinks {-a|--add} [-v|--verbose] <add-rpm> dir [dir ...]\n";
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exit $exitcode;
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};
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# Process the cmd line args
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my ($HELP, $DELETE, $ADD);
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Getopt::Long::Configure("bundling");
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Getopt::Long::Configure("no_pass_through");
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if (!GetOptions('h|?|help' => \$HELP, 'delete' => \$DELETE, 'a|add' => \$ADD, 'v|verbose' => \$::VERBOSE)) { $usage->(1); }
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if ($HELP) { $usage->(0); }
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if (scalar(@ARGV)<1 || (!$DELETE && scalar(@ARGV)<2) ) { $usage->(1); }
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my ($addrpm, $removerpm);
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if ($ADD) { $addrpm = shift @ARGV; }
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else { # delete or replace
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$removerpm = shift @ARGV;
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$addrpm = shift @ARGV;
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}
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# Go thru all the existing links
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my @out;
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if ($ADD) { @out = @ARGV; }
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else {
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print "Finding links...\n";
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@out = runcmd("find . -name '$removerpm' -type l");
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}
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@out = sort @out;
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foreach my $f (@out) {
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#print "f=$f\n";
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if (!$DELETE) { # add new link
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# separate the dir and filename and then also get the sym link dir
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my $dir;
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if ($ADD) { # the filename passed in is the dir
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$dir = $f;
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if ($dir !~ m|^\./|) { $dir = './' . $dir; } # this helps parsing later
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$dir =~ s|/$||;
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}
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else { ($dir) = $f =~ m|^(.*)/|; } # separate the dir from the filename
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my $linkdir;
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if ($ADD) { # derive the linkdir from the orginal dir
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$linkdir = $dir;
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$linkdir =~ s|/[^/]+|/\.\.|g; # change /abc into /..
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$linkdir =~ s|^\./||; # remove the preceding ./
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}
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else { # grab the linkdir from the existing sym link
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my $line = runcmd("ls -l $f");
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($linkdir) = $line =~ m|->\s+(.*)/|;
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}
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print "Creating $dir/$addrpm -> $linkdir/$addrpm\n";
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runcmd("ln -s $linkdir/$addrpm $dir/");
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}
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# Remove existing link. Do this part whether it was --delete or not.
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if (!$ADD) {
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print "Removing $f\n";
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runcmd("rm -f $f");
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}
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}
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exit;
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sub runcmd {
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my $cmd = shift @_;
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$cmd .= ' 2>&1';
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if ($::VERBOSE) { print "Running: $cmd\n"; }
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my @output = `$cmd`;
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if ($?) {
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my $rc = $? >> 8;
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if ($::VERBOSE) { die "Error: exit code from command is $rc\nCommand output: @output\n"; }
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else { die "Error running: $cmd\n Exit code from command is $rc\nCommand output: @output\n"; }
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}
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if (wantarray) {
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chomp(@output);
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return @output;
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}
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else {
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my $line = join('', @output);
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chomp $line;
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return $line;
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}
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}
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