—

              
#!perl
our $DATE = '2021-07-08'; # DATE
our $VERSION = '0.007'; # VERSION
use strict;
use warnings;
use Getopt::Long::Complete;
my %Opts = (
    postprocess => 1,
    format => 'context',
    color => $ENV{COLOR} // (-t STDOUT),
);
sub sanity_check {
    require File::Which;
    File::Which::which("diff") or die "diffwc: Can't find diff in PATH\n";
}
sub parse_cmdline {
    local @ARGV = @ARGV;
    # updated to diff 3.3 + color
    GetOptions(
        normal => sub {},
        'brief|q' => sub {},
        'report-identical-files|s' => sub {},
        'c' => sub { $Opts{format} = 'context' },
        'context|C' => sub { $Opts{format} = 'context' }, # XXX should've been context|C:i, but currently not supported by GLC
        'u' => sub { $Opts{format} = 'unified' },
        'unified|U' => sub { $Opts{format} = 'unified' }, # XXX should've been unified|U:i, but currently not supported by GLC
        'ed|e' => sub {},
        'rcs|n' => sub {},
        'side-by-side|y' => sub { $Opts{format} = 'side-by-side' },
        'width|W=i' => sub {},
        'left-column' => sub {},
        'suppress-common-lines' => sub {},
        'show-c-function|p' => sub {},
        'show-function-line|F=s' => sub {},
        'label=s' => sub {},
        'expand-tabs|t' => sub {},
        'initial-tab|T' => sub {},
        'tabsize=i' => sub {},
        'suppress-blank-empty' => sub {},
        'paginate|l' => sub {},
        'recursive|r' => sub {},
        'new-file|N' => sub {},
        'unidirectional-new-file' => sub {},
        'ignore-file-name-case!' => sub {},
        'exclude|x=s' => sub {},
        'exclude-from|X=s' => sub {}, # filename
        'starting-file|S' => sub {}, # filename
        'from-file=s' => sub {}, # filename
        'to-file=s' => sub {}, # filename
        'ignore-case|i' => sub {},
        'ignore-tab-expansion|E' => sub {},
        'ignore-trailing-space|Z' => sub {},
        'ignore-space-change|b' => sub {},
        'ignore-all-space|w' => sub {},
        'ignore-blank-lines|B' => sub {},
        'ignore-matching-lines|I=s' => sub {},
        'text|a' => sub {},
        'strip-trailing-cr' => sub {},
        'ifdef|D=s' => sub {},
        'GTYPE-group-format=s' => sub {},
        'line-format=s' => sub {},
        'LTYPE-line-format=s' => sub {},
        'minimal|d' => sub {},
        'horizon-lines=i' => sub {},
        'speed-large-files' => sub {},
        'help' => sub {},
        'version|v' => sub {},
        # user asks for diff's --color, let's skip post-processing then
        'color' => sub { $Opts{postprocess} = 0 },
    );
}
sub run {
    require App::diffwc;
    require ShellQuote::Any::Tiny;
    $Opts{postprocess} = 0 unless $Opts{format} eq 'unified';
    $Opts{postprocess} = 0 unless $Opts{color};
    unless ($Opts{postprocess}) {
        exec "diff", @ARGV;
    }
    my $cmd = "diff" . (@ARGV ? " " : "") .
        join(" ", map { ShellQuote::Any::Tiny::shell_quote($_) } @ARGV);
    open my $diff, "$cmd |" or die "diffwc: Can't run diff: $!\n";
    App::diffwc::postprocess($diff);
    close $diff;
    my $exitcode = $? < 0 ? $? : $? >> 8;
    exit $exitcode;
}
# MAIN
sanity_check();
parse_cmdline();
run();
1;
# ABSTRACT: diff + /w/ord highlighting + /c/olor
# PODNAME: diffwc
__END__
HideShow 125 lines of Pod
=pod
=encoding UTF-8
=head1 NAME
diffwc - diff + /w/ord highlighting + /c/olor
=head1 VERSION
This document describes version 0.007 of diffwc (from Perl distribution App-diffwc), released on 2021-07-08.
=head1 SYNOPSIS
Use as you would use B<diff> (the coloring and word highlighting currently will
only be shown if you use the unified format):
 % diffwc -u file1 file2
 % diffwc -ruN My-Dist-0.001 My-Dist-0.002
To alias B<diff> to B<diffwc>, in your shell startup file:
 alias diff=diffwc
Sample screenshot (using the Firenze color scheme):
=begin html
<img src="https://st.aticpan.org/source/PERLANCAR/App-diffwc-0.007/share/images/screenshot.jpg" />
=end html
=head1 DESCRIPTION
This is a wrapper for the GNU command-line utility B<diff>. It adds word
highlighting and colors (note that GNU diff 3.4 or later supports C<--color>
already).
=head1 COMPLETION
This script has shell tab completion capability with support for several
shells.
=head2 bash
To activate bash completion for this script, put:
 complete -C diffwc diffwc
in your bash startup (e.g. C<~/.bashrc>). Your next shell session will then
recognize tab completion for the command. Or, you can also directly execute the
line above in your shell to activate immediately.
It is recommended, however, that you install modules using L<cpanm-shcompgen>
which can activate shell completion for scripts immediately.
=head2 tcsh
To activate tcsh completion for this script, put:
 complete diffwc 'p/*/`diffwc`/'
in your tcsh startup (e.g. C<~/.tcshrc>). Your next shell session will then
recognize tab completion for the command. Or, you can also directly execute the
line above in your shell to activate immediately.
It is also recommended to install C<shcompgen> (see above).
=head2 other shells
For fish and zsh, install C<shcompgen> as described above.
=head1 ENVIRONMENT
=head2 COLOR
Boolean.
=head2 DIFFWC_COLOR_THEME
String. Will search color themes in C<ColorTheme::App::diffwc::*> modules.
=head1 HOMEPAGE
Please visit the project's homepage at L<https://metacpan.org/release/App-diffwc>.
=head1 SOURCE
Source repository is at L<https://github.com/perlancar/perl-App-diffwc>.
=head1 BUGS
Please report any bugs or feature requests on the bugtracker website L<https://rt.cpan.org/Public/Dist/Display.html?Name=App-diffwc>
When submitting a bug or request, please include a test-file or a
patch to an existing test-file that illustrates the bug or desired
feature.
=head1 SEE ALSO
L<https://github.com/walles/riff>, a Ruby-based utility by which this utility is
inspired. B<riff> is more git-oriented: it uses the same color scheme from git
while B<diffwc> comes with its own color schemes. B<riff> comes only as a
filter, while this package offers a B<diff> wrapper (B<diffwc>) as well as
filter (L<diffwc-filter-u>). B<riff> currently has problems dealing with
non-unified outputs or multiline word highlighting, and also it does not feel
like a typical Unix utility to me (no manpages, for example), so I made
B<diffwc> instead.
L<diffwc-filter-u> from the same package, in the form of B<diff> output filter.
=head1 AUTHOR
perlancar <perlancar@cpan.org>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2021, 2020, 2018, 2017 by perlancar@cpan.org.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut