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package File::pfopen; |
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# Author Nigel Horne: njh@bandsman.co.uk |
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# Copyright (C) 2017 Nigel Horne |
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# Usage is subject to licence terms. |
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# The licence terms of this software are as follows: |
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# Personal single user, single computer use: GPL2 |
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# All other users (including Commercial, Charity, Educational, Government) |
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# must apply in writing for a licence for use from Nigel Horne at the |
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# above e-mail. |
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113480
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use strict; |
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use warnings; |
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use File::Spec; |
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require Exporter; |
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our @ISA = ('Exporter'); |
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our @EXPORT_OK = ('pfopen'); |
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=head1 NAME |
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File::pfopen - Try hard to find a file |
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=head1 VERSION |
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Version 0.02 |
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=cut |
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our $VERSION = '0.02'; |
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=head1 SYNOPSIS |
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=head2 pfopen |
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use File::pfopen 'pfopen'; |
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($fh, $filename) = pfopen('/tmp:/var/tmp:/home/njh/tmp', 'foo', 'txt:bin')); |
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$fh = pfopen('/tmp:/var/tmp:/home/njh/tmp', 'foo')); |
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=cut |
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sub pfopen { |
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my $path = shift; |
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my $prefix = shift; |
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my $suffixes = shift; |
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our $savedpaths; |
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my $candidate; |
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if(defined($suffixes)) { |
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$candidate = "$prefix;$path;$suffixes"; |
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} else { |
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$candidate = "$prefix;$path"; |
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} |
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if($savedpaths->{$candidate}) { |
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# $self->_log({ message => "remembered $savedpaths->{$candidate}" }); |
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my $rc = $savedpaths->{$candidate}; |
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open(my $fh, '+<', $rc); |
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if(wantarray) { |
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return ($fh, $rc); |
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} |
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return $fh; |
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} |
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foreach my $dir(split(/:/, $path)) { |
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next unless(-d $dir); |
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if($suffixes) { |
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foreach my $suffix(split(/:/, $suffixes)) { |
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# $self->_log({ message => "check for file $dir/$prefix.$suffix" }); |
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my $rc = File::Spec->catfile($dir, "$prefix.$suffix"); |
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if(-r $rc) { |
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$savedpaths->{$candidate} = $rc; |
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open(my $fh, '+<', $rc); |
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if(wantarray) { |
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return ($fh, $rc); |
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} |
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return $fh; |
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} |
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} |
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} elsif(-r "$dir/$prefix") { |
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my $rc = File::Spec->catfile($dir, $prefix); |
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$savedpaths->{$candidate} = $rc; |
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# $self->_log({ message => "using $rc" }); |
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open(my $fh, '+<', $rc); |
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if(wantarray) { |
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return ($fh, $rc); |
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} |
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return $fh; |
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} |
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} |
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return(); |
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} |
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=head1 AUTHOR |
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Nigel Horne, C<< >> |
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=head1 BUGS |
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Please report any bugs or feature requests to C, |
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or through the web interface at |
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L. |
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I will be notified, and then you'll |
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automatically be notified of progress on your bug as I make changes. |
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=head1 SEE ALSO |
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=head1 SUPPORT |
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You can find documentation for this module with the perldoc command. |
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perldoc File::pfopen |
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You can also look for information at: |
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=over 4 |
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=item * RT: CPAN's request tracker |
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L |
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=item * AnnoCPAN: Annotated CPAN documentation |
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L |
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=item * CPAN Ratings |
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=item * Search CPAN |
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L |
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=back |
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=head1 LICENSE AND COPYRIGHT |
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Copyright 2017 Nigel Horne. |
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Usage is subject to licence terms. |
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The licence terms of this software are as follows: |
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* Personal single user, single computer use: GPL2 |
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* All other users (including Commercial, Charity, Educational, Government) |
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must apply in writing for a licence for use from Nigel Horne at the |
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above e-mail. |
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=cut |
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1; |