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Utils.pm
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Utils.pm
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package Biber::Utils;
use 5.014000;
use strict;
use warnings;
use re 'eval';
use base 'Exporter';
use constant {
EXIT_OK => 0,
EXIT_ERROR => 2
};
use Carp;
use Encode;
use File::Find;
use File::Spec;
use IPC::Cmd qw( can_run );
use IPC::Run3; # This works with PAR::Packer and Windows. IPC::Run doesn't
use Biber::Constants;
use Biber::LaTeX::Recode;
use Biber::Entry::Name;
use Regexp::Common qw( balanced );
use Log::Log4perl qw(:no_extra_logdie_message);
my $logger = Log::Log4perl::get_logger('main');
=encoding utf-8
=head1 NAME
Biber::Utils - Various utility subs used in Biber
=cut
=head1 EXPORT
All functions are exported by default.
=cut
our @EXPORT = qw{ locate_biber_file driver_config makenamesid makenameid stringify_hash
normalise_string normalise_string_hash normalise_string_underscore normalise_string_sort
normalise_string_label reduce_array remove_outer add_outer ucinit strip_nosort strip_noinit
is_def is_undef is_def_and_notnull is_def_and_null
is_undef_or_null is_notnull is_null normalise_utf8 inits join_name latex_recode_output
filter_entry_options biber_error biber_warn ireplace imatch validate_biber_xml };
=head1 FUNCTIONS
=head2 driver_config
Returns an XML::LibXML::Simple object for an input driver config file
=cut
sub driver_config {
my $driver_name = shift;
# we assume that the driver config file is in the same dir as the driver:
(my $vol, my $driver_path, undef) = File::Spec->splitpath( $INC{"Biber/Input/file/${driver_name}.pm"} );
# Deal with the strange world of Par::Packer paths, see similar code in Biber.pm
my $dcf;
if ($driver_path =~ m|/par\-| and $driver_path !~ m|/inc|) { # a mangled PAR @INC path
$dcf = File::Spec->catpath($vol, "$driver_path/inc/lib/Biber/Input/file", "${driver_name}.dcf");
}
else {
$dcf = File::Spec->catpath($vol, $driver_path, "${driver_name}.dcf");
}
# Read driver config file
my $dcfxml = XML::LibXML::Simple::XMLin($dcf,
'ForceContent' => 1,
'ForceArray' => [ qr/\Afield\z/,
qr/\Aalias\z/,
qr/\Aalsoset\z/],
'NsStrip' => 1);
return $dcfxml;
}
=head2 locate_biber_file
Searches for a file by
For the exact path if the filename is absolute
In the output_directory, if defined
Relative to the current directory
In the same directory as the control file
Using kpsewhich, if available
=cut
sub locate_biber_file {
my $filename = shift;
my $filenamepath = $filename; # default if nothing else below applies
my $outfile;
# If output_directory is set, perhaps the file can be found there so
# construct a path to test later
if (my $outdir = Biber::Config->getoption('output_directory')) {
$outfile = File::Spec->catfile($outdir, $filename);
}
# Filename is absolute
if (File::Spec->file_name_is_absolute($filename) and -e $filename) {
return $filename;
}
# File is output_directory
if (defined($outfile) and -e $outfile) {
return $outfile;
}
# File is relative to cwd
if (-e $filename) {
return $filename;
}
# File is where control file lives
if (my $cfp = Biber::Config->get_ctrlfile_path) {
my ($ctlvolume, $ctldir, undef) = File::Spec->splitpath($cfp);
if ($ctlvolume) { # add vol sep for windows if volume is set and there isn't one
$ctlvolume .= ':' unless $ctlvolume =~ /:\z/;
}
if ($ctldir) { # add path sep if there isn't one
$ctldir .= '/' unless $ctldir =~ /\/\z/;
}
my $path = "$ctlvolume$ctldir$filename";
return $path if -e $path;
}
# File is in kpse path
if (can_run('kpsewhich')) {
$logger->debug("Looking for file '$filename' via kpsewhich");
my $found;
my $err;
run3 [ 'kpsewhich', $filename ], \undef, \$found, \$err, { return_if_system_error => 1};
if ($?) {
$logger->debug("kpsewhich returned error: $err ($!)");
}
$logger->trace("kpsewhich returned '$found'");
if ($found) {
$logger->debug("Found '$filename' via kpsewhich");
chomp $found;
$found =~ s/\cM\z//xms; # kpsewhich in cygwin sometimes returns ^M at the end
# filename can be UTF-8 and run3() isn't clever with UTF-8
return decode_utf8($found);
}
else {
$logger->debug("Could not find '$filename' via kpsewhich");
}
}
return undef;
}
=head2 biber_warn
Wrapper around various warnings bits and pieces
Logs a warning, add warning to the list of .bbl warnings and optionally
increments warning count in Biber object, if present
=cut
sub biber_warn {
my ($warning, $entry) = @_;
$logger->warn($warning);
$entry->add_warning($warning) if $entry;
$Biber::MASTER->{warnings}++;
return;
}
=head2 biber_error
Wrapper around error logging
Forces an exit.
=cut
sub biber_error {
my $error = shift;
$logger->error($error);
$Biber::MASTER->{errors}++;
# exit unless user requested not to for errors
unless (Biber::Config->getoption('nodieonerror')) {
$Biber::MASTER->display_problems;
exit EXIT_ERROR;
}
}
=head2 makenamesid
Given a Biber::Names object, return an underscore normalised
concatenation of all of the full name strings.
=cut
sub makenamesid {
my $names = shift;
my @namestrings;
foreach my $name (@{$names->names}) {
push @namestrings, $name->get_namestring;
}
my $tmp = join ' ', @namestrings;
return normalise_string_underscore($tmp);
}
=head2 makenameid
Given a Biber::Name object, return an underscore normalised
concatenation of the full name strings.
=cut
sub makenameid {
my $name = shift;
return normalise_string_underscore($name->get_namestring);
}
=head2 latex_recode_output
Tries to convert UTF-8 to TeX macros in passed string
=cut
sub latex_recode_output {
my $string = shift;
return Biber::LaTeX::Recode::latex_encode($string);
};
=head2 strip_noinit
Removes elements which are not to be considered during initials generation
in names
=cut
sub strip_noinit {
my $string = shift;
return '' unless $string; # Sanitise missing data
return $string unless my $noinit = Biber::Config->getoption('noinit');
foreach my $opt (@$noinit) {
my $re = $opt->{value};
$re = qr/$re/;
$string =~ s/$re//gxms;
}
return $string;
}
=head2 strip_nosort
Removes elements which are not to be used in sorting a name from a string
=cut
sub strip_nosort {
my $string = shift;
my $fieldname = shift;
return '' unless $string; # Sanitise missing data
return $string unless my $nosort = Biber::Config->getoption('nosort');
# Strip user-defined REs from string
my $restrings;
foreach my $nsopt (@$nosort) {
# Specific fieldnames override types
if (lc($nsopt->{name}) eq lc($fieldname)) {
push @$restrings, $nsopt->{value};
}
}
unless ($restrings) {
foreach my $nsopt (@$nosort) {
next unless $nsopt->{name} =~ /\Atype_/xms;
if ($NOSORT_TYPES{lc($nsopt->{name})}{lc($fieldname)}) {
push @$restrings, $nsopt->{value};
}
}
}
# If no nosort to do, just return string
return $string unless $restrings;
foreach my $re (@$restrings) {
$re = qr/$re/;
$string =~ s/$re//gxms;
}
return $string;
}
=head2 normalise_string_label
Remove some things from a string for label generation, like braces.
It also decodes LaTeX character macros into Unicode as this is always safe when
normalising strings for sorting since they don't appear in the output.
=cut
sub normalise_string_label {
my $str = shift;
my $fieldname = shift;
return '' unless $str; # Sanitise missing data
# Replace LaTeX chars by Unicode for sorting
# Don't bother if output is UTF-8 as in this case, we've already decoded everthing
# before we read the file (see Biber.pm)
unless (Biber::Config->getoption('output_encoding') eq 'UTF-8') {
$str = latex_decode($str, strip_outer_braces => 1,
scheme => Biber::Config->getoption('decodecharsset'));
}
return normalise_string_common($str);
}
=head2 normalise_string_sort
Removes LaTeX macros, and all punctuation, symbols, separators and control characters,
as well as leading and trailing whitespace for sorting strings.
It also decodes LaTeX character macros into Unicode as this is always safe when
normalising strings for sorting since they don't appear in the output.
=cut
sub normalise_string_sort {
my $str = shift;
my $fieldname = shift;
return '' unless $str; # Sanitise missing data
# First strip nosort REs
$str = strip_nosort($str, $fieldname);
# Then replace ties with spaces or they will be lost
$str =~ s/([^\\])~/$1 /g; # Foo~Bar -> Foo Bar
# Replace LaTeX chars by Unicode for sorting
# Don't bother if output is UTF-8 as in this case, we've already decoded everthing
# before we read the file (see Biber.pm)
unless (Biber::Config->getoption('output_encoding') eq 'UTF-8') {
$str = latex_decode($str, strip_outer_braces => 1,
scheme => Biber::Config->getoption('decodecharsset'));
}
return normalise_string_common($str);
}
=head2 normalise_string
Removes LaTeX macros, and all punctuation, symbols, separators and control characters,
as well as leading and trailing whitespace for sorting strings.
Only decodes LaTeX character macros into Unicode if output is UTF-8
=cut
sub normalise_string {
my $str = shift;
return '' unless $str; # Sanitise missing data
# First replace ties with spaces or they will be lost
$str =~ s/([^\\])~/$1 /g; # Foo~Bar -> Foo Bar
if (Biber::Config->getoption('output_encoding') eq 'UTF-8') {
$str = latex_decode($str, strip_outer_braces => 1,
scheme => Biber::Config->getoption('decodecharsset'));
}
return normalise_string_common($str);
}
=head2 normalise_string_common
Common bit for normalisation
=cut
sub normalise_string_common {
my $str = shift;
$str =~ s/\\[A-Za-z]+//g; # remove latex macros (assuming they have only ASCII letters)
$str =~ s/[\p{P}\p{S}\p{C}]+//g; # remove punctuation, symbols, separator and control
$str =~ s/^\s+//; # Remove leading spaces
$str =~ s/\s+$//; # Remove trailing spaces
$str =~ s/\s+/ /g; # collapse spaces
return $str;
}
=head2 normalise_string_hash
Normalise strings used for hashes. We collapse LaTeX macros into a vestige
so that hashes are unique between things like:
Smith
{\v S}mith
we replace macros like this to preserve their vestiges:
\v S -> v:
\" -> 34:
=cut
sub normalise_string_hash {
my $str = shift;
return '' unless $str; # Sanitise missing data
$str =~ s/\\(\p{L}+)\s*/$1:/g; # remove tex macros
$str =~ s/\\([^\p{L}])\s*/ord($1).':'/ge; # remove accent macros like \"a
$str =~ s/[{}~\.\s]+//g; # Remove brackes, ties, dots, spaces
return $str;
}
=head2 normalise_string_underscore
Like normalise_string, but also substitutes ~ and whitespace with underscore.
=cut
sub normalise_string_underscore {
my $str = shift;
return '' unless $str; # Sanitise missing data
$str =~ s/([^\\])~/$1 /g; # Foo~Bar -> Foo Bar
$str = normalise_string($str);
$str =~ s/\s+/_/g;
return $str;
}
=head2 reduce_array
reduce_array(\@a, \@b) returns all elements in @a that are not in @b
=cut
sub reduce_array {
my ($a, $b) = @_;
my %countb = ();
foreach my $elem (@$b) {
$countb{$elem}++;
}
my @result;
foreach my $elem (@$a) {
push @result, $elem unless $countb{$elem};
}
return @result;
}
=head2 remove_outer
Remove surrounding curly brackets:
'{string}' -> 'string'
=cut
sub remove_outer {
my $str = shift;
$str =~ s/^{(.+)}$/$1/;
return $str;
}
=head2 add_outer
Add surrounding curly brackets:
'string' -> '{string}'
=cut
sub add_outer {
my $str = shift;
return '{' . $str . '}';
}
=head2 ucinit
upper case of initial letters in a string
=cut
sub ucinit {
my $str = shift;
$str = lc($str);
$str =~ s/\b(\p{Ll})/\u$1/g;
return $str;
}
=head2 is_undef
Checks for undefness of arbitrary things, including
composite method chain calls which don't reliably work
with defined() (see perldoc for defined())
This works because we are just testing the value passed
to this sub. So, for example, this is randomly unreliable
even if the resulting value of the arg to defined() is "undef":
defined($thing->method($arg)->method)
wheras:
is_undef($thing->method($arg)->method)
works since we only test the return value of all the methods
with defined()
=cut
sub is_undef {
my $val = shift;
return defined($val) ? 0 : 1;
}
=head2 is_def
Checks for definedness in the same way as is_undef()
=cut
sub is_def {
my $val = shift;
return defined($val) ? 1 : 0;
}
=head2 is_undef_or_null
Checks for undef or nullness (see is_undef() above)
=cut
sub is_undef_or_null {
my $val = shift;
return 1 if is_undef($val);
return $val ? 0 : 1;
}
=head2 is_def_and_notnull
Checks for def and unnullness (see is_undef() above)
=cut
sub is_def_and_notnull {
my $arg = shift;
if (defined($arg) and is_notnull($arg)) {
return 1;
}
else {
return 0;
}
}
=head2 is_def_and_null
Checks for def and nullness (see is_undef() above)
=cut
sub is_def_and_null {
my $arg = shift;
if (defined($arg) and is_null($arg)) {
return 1;
}
else {
return 0;
}
}
=head2 is_null
Checks for nullness
=cut
sub is_null {
my $arg = shift;
return is_notnull($arg) ? 0 : 1;
}
=head2 is_notnull
Checks for notnullness
=cut
sub is_notnull {
my $arg = shift;
return undef unless defined($arg);
my $st = is_notnull_scalar($arg);
if (defined($st) and $st) { return 1; }
my $at = is_notnull_array($arg);
if (defined($at) and $at) { return 1; }
my $ht = is_notnull_hash($arg);
if (defined($ht) and $ht) { return 1; }
my $ot = is_notnull_object($arg);
if (defined($ot) and $ot) { return 1; }
return 0;
}
=head2 is_notnull_scalar
Checks for notnullness of a scalar
=cut
sub is_notnull_scalar {
my $arg = shift;
unless (ref \$arg eq 'SCALAR') {
return undef;
}
return $arg ne '' ? 1 : 0;
}
=head2 is_notnull_array
Checks for notnullness of an array (passed by ref)
=cut
sub is_notnull_array {
my $arg = shift;
unless (ref $arg eq 'ARRAY') {
return undef;
}
my @arr = @$arg;
return $#arr > -1 ? 1 : 0;
}
=head2 is_notnull_hash
Checks for notnullness of an hash (passed by ref)
=cut
sub is_notnull_hash {
my $arg = shift;
unless (ref $arg eq 'HASH') {
return undef;
}
my @arr = keys %$arg;
return $#arr > -1 ? 1 : 0;
}
=head2 is_notnull_object
Checks for notnullness of an object (passed by ref)
=cut
sub is_notnull_object {
my $arg = shift;
unless (ref($arg) =~ m/\ABiber::/xms) {
return undef;
}
return $arg->notnull ? 1 : 0;
}
=head2 stringify_hash
Turns a hash into a string of keys and values
=cut
sub stringify_hash {
my $hashref = shift;
my $string;
while (my ($k,$v) = each %$hashref) {
$string .= "$k => $v, ";
}
# Take off the trailing comma and space
chop $string;
chop $string;
return $string;
}
=head2 normalise_utf8
Normalise any UTF-8 encoding string immediately to exactly what we want
We want the strict perl utf8 "UTF-8"
=cut
sub normalise_utf8 {
if (defined(Biber::Config->getoption('input_encoding')) and
Biber::Config->getoption('input_encoding') =~ m/\Autf-?8\z/xmsi) {
Biber::Config->setoption('input_encoding', 'UTF-8');
}
if (defined(Biber::Config->getoption('output_encoding')) and
Biber::Config->getoption('output_encoding') =~ m/\Autf-?8\z/xmsi) {
Biber::Config->setoption('output_encoding', 'UTF-8');
}
}
=head2 inits
We turn the initials into an array so we can be flexible with them later
The tie here is used only so we know what to split on. We don't want to make
any typesetting decisions in Biber, like what to use to join initials so on
output to the .bbl, we only use BibLaTeX macros.
=cut
sub inits {
my $istring = shift;
return [ split(/(?<!\\)~/, $istring) ];
}
=head2 join_name
Replace all join typsetting elements in a name part (space, ties) with BibLaTeX macros
so that typesetting decisions are made in BibLaTeX, not hard-coded in Biber
=cut
sub join_name {
my $nstring = shift;
$nstring =~ s/(?<!\\\S)\s+/\\bibnamedelimb /gxms; # Don't do spaces in char macros
$nstring =~ s/(?<!\\)~/\\bibnamedelima /gxms; # Don't do '\~'
# Special delim after name parts ending in period
$nstring =~ s/(?<=\.)\\bibnamedelim[ab]/\\bibnamedelimi/gxms;
return $nstring;
}
=head2 filter_entry_options
Process any per_entry option transformations which are necessary
=cut
sub filter_entry_options {
my $options = shift;
return '' unless $options;
my @entryoptions = split /\s*,\s*/, $options;
my @return_options;
foreach (@entryoptions) {
m/^([^=]+)=?(.+)?$/;
given ($CONFIG_BIBLATEX_PER_ENTRY_OPTIONS{lc($1)}{OUTPUT}) {
# Standard option
when (not defined($_) or $_ == 1) {
push @return_options, $1 . ($2 ? "=$2" : '') ;
}
# Set all split options to same value as parent
when (ref($_) eq 'ARRAY') {
foreach my $map (@$_) {
push @return_options, "$map=$2";
}
}
# Set all splits to specific values
when (ref($_) eq 'HASH') {
foreach my $map (keys %$_) {
push @return_options, "$map=" . $_->{$map};
}
}
}
}
return join(',', @return_options);
}
=head2 imatch
Do an interpolating match using a match RE and a string passed in as variables
=cut
sub imatch {
my ($value, $val_match) = @_;
return 0 unless $val_match;
$val_match = qr/$val_match/;
return $value =~ m/$val_match/xms;
}
=head2 ireplace
Do an interpolating match/replace using a match RE, replacement RE
and string passed in as variables
=cut
sub ireplace {
my ($value, $val_match, $val_replace) = @_;
return $value unless $val_match;
$val_match = qr/$val_match/;
# Tricky quoting because of later evals
$val_replace = '"' . $val_replace . '"';
$value =~ s/$val_match/$val_replace/eegxms;
return $value;
}
=head2 validate_biber_xml
Validate a biber/biblatex XML metadata file against an RNG schema
=cut
sub validate_biber_xml {
my ($file, $type, $prefix) = @_;
require XML::LibXML;
# Set up XML parser
my $xmlparser = XML::LibXML->new();
$xmlparser->line_numbers(1); # line numbers for more informative errors
# Set up schema
my $xmlschema;
# we assume that the schema files are in the same dir as Biber.pm:
(my $vol, my $biber_path, undef) = File::Spec->splitpath( $INC{"Biber.pm"} );
$biber_path =~ s/\/$//; # splitpath sometimes leaves a trailing '/'
# Deal with the strange world of Par::Packer paths
# We might be running inside a PAR executable and @INC is a bit odd in this case
# Specifically, "Biber.pm" in @INC might resolve to an internal jumbled name
# nowhere near to these files. You know what I mean if you've dealt with pp
my $rng;
if ($biber_path =~ m|/par\-| and $biber_path !~ m|/inc|) { # a mangled PAR @INC path
$rng = File::Spec->catpath($vol, "$biber_path/inc/lib/Biber", "${type}.rng");
}
else {
$rng = File::Spec->catpath($vol, "$biber_path/Biber", "${type}.rng");
}
if (-e $rng) {
$xmlschema = XML::LibXML::RelaxNG->new( location => $rng )
}
else {
biber_warn("Cannot find XML::LibXML::RelaxNG schema. Skipping validation : $!");
return;
}
# Parse file
my $xp = $xmlparser->parse_file($file);
# XPath context
if ($prefix) {
my $xpc = XML::LibXML::XPathContext->new($xp);
$xpc->registerNs($type, $prefix);
}
# Validate against schema. Dies if it fails.
eval { $xmlschema->validate($xp) };
if (ref($@)) {
$logger->debug( $@->dump() );
biber_error("'$file' failed to validate against schema '$rng'");
}
elsif ($@) {
biber_error("'$file' failed to validate against schema '$rng'\n$@");
}
else {
$logger->info("'$file' validates against schema '$rng'");
}
undef $xmlparser;
}
1;
__END__
=head1 AUTHOR
François Charette, C<< <firmicus at ankabut.net> >>
Philip Kime C<< <philip at kime.org.uk> >>
=head1 BUGS
Please report any bugs or feature requests on our sourceforge tracker at
L<https://sourceforge.net/tracker2/?func=browse&group_id=228270>.
=head1 COPYRIGHT & LICENSE
Copyright 2009-2013 François Charette and Philip Kime, all rights reserved.
This module is free software. You can redistribute it and/or
modify it under the terms of the Artistic License 2.0.
This program is distributed in the hope that it will be useful,
but without any warranty; without even the implied warranty of
merchantability or fitness for a particular purpose.
=cut