App-psort

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bin/psort  view on Meta::CPAN

=head1 SYNOPSIS

    psort [OPTION]... [FILE]...

=head1 DESCRIPTION

A perl-enhanced variant of L<sort(1)>. The specified files (or
standard input) are written sorted to standard output.

By default, sorting is done using perl's L<< cmp|perlop/cmp >>
operator, without any use of locales or encodings.

=head2 OPTIONS

=over

=item -b, --ignore-leading-blanks

Ignore any whitespace character (C<\s>) at the beginning of a line.

=item -c, --check

bin/psort  view on Meta::CPAN

the variables C<$a> and C<$b> are available.

Examples

=over

=item * Reimplementing the C<-n> switch:

    -C '$a <=> $b'

=item * Using locale comparisons:

    -C 'use locale; $a cmp $b'

=back

Note that it is possible to put C<BEGIN { ... }> blocks into the
comparison function.

=item -e, --field-function

Extract the sorting field (or the sorting key) using a custom perl
function. For your convenience, the enclosing "sub {" and "}" must not

bin/psort  view on Meta::CPAN

By default psort warns if a custom field function or rx returns an
undefined value. These warnings may be suppressed with this option.

=back

=head2 COMPATIBILITY

Some options found in GNU/POSIX sort are also available in psort. But
no attempt was done to make psort compatible to GNU/POSIX sort.
Especially there's no locale support (but see above how to C<use
locale> in the C<-C> option). There's also no encoding support (though
it probably can be emulated by using C<<Encode/decode> in the C<-e> or
C<-C> option).

=head2 TODO

Here are some ideas for future options:

=over

=item C<--encoding>

bin/psort  view on Meta::CPAN

    psort -MUnicode::Collate -MEncode=decode -e 'decode("utf-8", $_)' -C 'BEGIN { $Collator = Unicode::Collate->new } $Collator->cmp($a,$b)'

=item Sort specific columns (<-k>)

Currently one has to use something like the following to sort by
columns:

    psort -e '@F=split; $F[...]'

=item C<--locale>

Specify a locale.

=item C<-o>

Instead writing to standard output, write to the specified output file.

=item C<-m>

Assume that input files are already sorted.

=item C<-u>