author | František Kučera <franta-hg@frantovo.cz> |
Mon, 11 Nov 2019 14:42:13 +0100 | |
branch | v_0 |
changeset 28 | 9172bd97ae99 |
permissions | -rwxr-xr-x |
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#!/usr/bin/perl |
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# Relational pipes |
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# Copyright © 2019 František Kučera (Frantovo.cz, GlobalCode.info) |
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# |
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# This program is free software: you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation, version 3 of the License. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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use strict; |
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use warnings; |
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use XML::LibXML; # documentation: https://metacpan.org/pod/XML::LibXML |
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if (@ARGV == 0) { |
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print "1\n"; |
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if ($ENV{type}) { print "$ENV{type}\n"; } else { print "string\n"; } |
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} else { |
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my $dom = XML::LibXML->new->parse_file($ARGV[0]); |
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my $xpath = XML::LibXML::XPathContext->new($dom); |
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# You can add your favorite XML namespaces here: |
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# $xpath->registerNs('relpipe', 'tag:globalcode.info,2018:relpipe'); |
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# $xpath->registerNs('xhtml', 'http://www.w3.org/1999/xhtml'); |
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# $xpath->registerNs('svg', 'http://www.w3.org/2000/svg'); |
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# $xpath->registerNs('atom', 'http://www.w3.org/2005/Atom'); |
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# $xpath->registerNs('maven', 'http://maven.apache.org/POM/4.0.0'); |
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# |
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# Or set environmental variables: |
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# export xmlns_r='tag:globalcode.info,2018:relpipe' |
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# Load XML namespaces from options: |
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# usage: --option 'env:xmlns_r' 'tag:globalcode.info,2018:relpipe' → r="tag:globalcode.info,2018:relpipe" |
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for my $name (keys %ENV) { |
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if ($name =~ /xmlns_(.*)/) { $xpath->registerNs($1, $ENV{$name}); } |
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} |
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# Execute XPath and concatenate results (usually should be only one): |
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# usage: --option env:xpath '//r:name' |
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for my $value ($xpath->find($ENV{xpath})) { |
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print $value; |
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} |
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} |