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=head1 NAME |
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ex::newest - look for newest versions of modules installed several times |
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=cut |
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package ex::newest; |
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{ |
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local $^W = 0; |
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require v5.7.2; |
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} |
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54792
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use strict; |
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use warnings; |
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no warnings 'redefine'; |
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use ExtUtils::MM_Unix; |
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490869
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1750
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our $VERSION = '0.02'; |
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sub ex::newest::INC { |
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my ($self, $file) = @_; |
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return undef if substr($file,-3) ne '.pm'; # Handle only modules |
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my $package = substr($file,0,-3); |
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$package =~ s,/,::,g; |
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my @found; |
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my $path; |
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for my $dir (@INC) { |
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next if ref $dir; |
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$path = "$dir/$file"; |
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100
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push @found, $path if -f $path && -r _; |
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} |
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return undef if not @found; |
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if (@found == 1) { |
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$path = $found[0]; |
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} else { |
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my @versions = (); |
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for my $f (@found) { |
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my $version = ExtUtils::MM_Unix::parse_version(undef,$f) || 0; |
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push @versions, [ $version, $f ]; |
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} |
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@versions = sort { $b->[0] <=> $a->[0] } @versions; |
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$path = $versions[0][1]; |
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} |
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open my $fh, $path |
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or return undef; # Fallback to the regular mechanism |
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$INC{$file} = $path; |
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return $fh; |
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} |
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sub rm_hook () { |
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0
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@INC = grep { ref ne __PACKAGE__ } @INC; |
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} |
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# We override lib.pm to ensure that the ex::newest object |
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# remains in front of @INC. |
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sub lib::import { |
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rm_hook; |
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local *lib::import; |
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local $^W = 0; # Silent non-lexical warnings |
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delete $INC{'lib.pm'}; |
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2068
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require lib; |
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3
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2056
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import lib @_[1..$#_]; |
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3
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380
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import ex::newest; |
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} |
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sub lib::unimport { |
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rm_hook; |
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local *lib::unimport; |
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local $^W = 0; |
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delete $INC{'lib.pm'}; |
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require lib; |
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unimport lib @_[1..$#_]; |
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import ex::newest; |
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} |
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sub import { |
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8
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unshift @INC, bless {} unless grep { ref eq __PACKAGE__ } @INC; |
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$INC{'lib.pm'} = __FILE__; |
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} |
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sub unimport { |
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1
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rm_hook; |
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# Restore lib.pm |
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1
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4
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local $^W = 0; |
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1
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2
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delete $INC{'lib.pm'}; |
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1
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292
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require lib; |
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} |
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1; |
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__END__ |