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#!perl
=pod
Squashes together the parts of ack into the single ack-standalone
file.
The arguments to squash are either filenames from the ack distro
like Ack.pm, or module names like File::Next. For modules, squash
loads them and then pushes them into ack-standalone.
POD gets stripped from all modules.
=cut
use warnings;
use strict;
use File::Next;
# Make clear that ack is not supposed to be edited.
my $NO_EDIT_COMMENT = <<'EOCOMMENT';
#
# This file, ack, is generated code.
# Please DO NOT EDIT or send patches for it.
#
# Please take a look at the source from
# https://github.com/beyondgrep/ack3
# and submit patches against the individual files
# that build ack.
#
EOCOMMENT
my @parts;
push @parts, <<"PERL";
#!/usr/bin/env perl
$NO_EDIT_COMMENT
\$App::Ack::STANDALONE = 1;
PERL
for my $arg ( @ARGV ) {
my $filename = $arg;
if ( $arg =~ /::/ ) {
my $key = "$arg.pm";
$key =~ s{::}{/}g;
$filename = $INC{$key} or die "Can't find the file for $arg";
}
my $is_ack = $filename eq 'ack';
warn "Reading $filename\n";
push @parts,
"{\n",
_get_code_from_file( $filename ),
"}\n",
;
}
my $code = join( '', @parts );
# We only use two of the four constructors in File::Next, so delete the other two.
for my $unused_func ( qw( dirs everything ) ) {
$code =~ s/^sub $unused_func\b.*?^}//sm or die qq{Unable to find the sub "$unused_func" to remove from ack-standalone};
}
print $code;
exit 0;
sub _get_code_from_file {
my $filename = shift;
my @lines;
open( my $fh, '<', $filename ) or die "Can't open $filename: $!";
my $was_in_pod = 0;
my $in_pod = 0;
while ( <$fh> ) {
next if /^use (?:File::Next|App::Ack)/;
s/^use parent (.+)/BEGIN {\n our \@ISA = $1\n}/;
if ( $was_in_pod && !$in_pod ) {
$was_in_pod = 0;
}
# See if we're in module POD blocks.
if ( $filename ne 'ack' ) {
$was_in_pod = $in_pod;
if ( /^=(\w+)/ ) {
$in_pod = ($1 ne 'cut');
next;
}
elsif ( $in_pod ) {
next;
}
}
# Replace the shebang line and append 'no edit' comment
if ( s{^#!.+}{package main;} ) {
# Skip the shebang line and replace it with package statement.
}
# Remove Perl::Critic comments.
# I'd like to remove all comments, but this is a start
s{\s*##.+critic.*}{};
push @lines, $_;
}
close $fh;
return join( '', @lines );
}
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