/
Ack.pm
1115 lines (841 loc) · 28.4 KB
/
Ack.pm
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package App::Ack;
use warnings;
use strict;
use App::Ack::ConfigDefault;
use App::Ack::ConfigFinder;
use Getopt::Long 2.36 ();
use File::Next 1.10;
=head1 NAME
App::Ack - A container for functions for the ack program
=head1 VERSION
Version 2.00a01
=cut
our $VERSION;
our $COPYRIGHT;
BEGIN {
$VERSION = '2.00a01';
$COPYRIGHT = 'Copyright 2005-2012 Andy Lester.';
}
our $fh;
BEGIN {
$fh = *STDOUT;
}
our %types;
our %type_wanted;
our %mappings;
our %ignore_dirs;
our $is_filter_mode;
our $output_to_pipe;
our $dir_sep_chars;
our $is_cygwin;
our $is_windows;
use File::Spec 1.00015 ();
use File::Glob 1.00015 ':glob';
BEGIN {
# These have to be checked before any filehandle diddling.
$output_to_pipe = not -t *STDOUT;
$is_filter_mode = -p STDIN;
$is_cygwin = ($^O eq 'cygwin');
$is_windows = ($^O =~ /MSWin32/);
$dir_sep_chars = $is_windows ? quotemeta( '\\/' ) : quotemeta( File::Spec->catfile( '', '' ) );
}
=head1 SYNOPSIS
If you want to know about the F<ack> program, see the F<ack> file itself.
No user-serviceable parts inside. F<ack> is all that should use this.
=head1 FUNCTIONS
=head2 read_ackrc
Reads the contents of the .ackrc file and returns the arguments.
=cut
sub retrieve_arg_sources {
my @arg_sources;
my $noenv;
my $ackrc;
Getopt::Long::Configure('default', 'no_auto_help', 'no_auto_version');
Getopt::Long::Configure('pass_through');
Getopt::Long::Configure('no_auto_abbrev');
Getopt::Long::GetOptions(
'noenv' => \$noenv,
'ackrc=s' => \$ackrc,
);
Getopt::Long::Configure('default', 'no_auto_help', 'no_auto_version');
my @files;
if ( !$noenv ) {
my $finder = App::Ack::ConfigFinder->new;
@files = $finder->find_config_files;
}
if ( $ackrc ) {
# we explicitly use open so we get a nice error message
# XXX this is a potential race condition!
if(open my $fh, '<', $ackrc) {
close $fh;
} else {
die "Unable to load ackrc '$ackrc': $!"
}
push( @files, $ackrc );
}
push @arg_sources, Defaults => [ App::Ack::ConfigDefault::options() ];
foreach my $file ( @files) {
my @lines = read_rcfile($file);
push ( @arg_sources, $file, \@lines ) if @lines;
}
if ( $ENV{ACK_OPTIONS} && !$noenv ) {
push( @arg_sources, 'ACK_OPTIONS' => $ENV{ACK_OPTIONS} );
}
push( @arg_sources, 'ARGV' => [ @ARGV ] );
return @arg_sources;
}
sub read_rcfile {
my $file = shift;
return unless defined $file && -e $file;
my @lines;
open( my $fh, '<', $file ) or App::Ack::die( "Unable to read $file: $!" );
while ( my $line = <$fh> ) {
chomp $line;
$line =~ s/^\s+//;
$line =~ s/\s+$//;
next if $line eq '';
next if $line =~ /^#/;
push( @lines, $line );
}
close $fh;
return @lines;
}
=head2 create_ignore_rules( $what, $where, \@opts )
Takes an array of options passed in on the command line and returns
a hashref of information about them:
*
# is: Match the filename exactly
# ext: Match the extension
# regex: Match against a Perl regular expression
=cut
sub create_ignore_rules {
my $what = shift;
my $where = shift;
my $opts = shift;
my @opts = @{$opts};
my %rules;
for my $opt ( @opts ) {
if ( $opt =~ /^(is|ext|regex),(.+)$/ ) {
my $method = $1;
my $arg = $2;
if ( $method eq 'regex' ) {
push( @{$rules{regex}}, qr/$arg/ );
}
else {
++$rules{$method}{$arg};
}
}
else {
App::Ack::die( "Invalid argument for --$what: $opt" );
}
}
return \%rules;
}
=head2 remove_dir_sep( $path )
This functions removes a trailing path separator, if there is one, from its argument
=cut
sub remove_dir_sep {
my $path = shift;
$path =~ s/[$dir_sep_chars]$//;
return $path;
}
=head2 build_regex( $str, \%opts )
Returns a regex object based on a string and command-line options.
Dies when the regex $str is undefinied (i.e. not given on command line).
=cut
sub build_regex {
my $str = shift;
my $opt = shift;
defined $str or App::Ack::die( 'No regular expression found.' );
$str = quotemeta( $str ) if $opt->{Q};
if ( $opt->{w} ) {
$str = "\\b$str" if $str =~ /^\w/;
$str = "$str\\b" if $str =~ /\w$/;
}
my $regex_is_lc = $str eq lc $str;
if ( $opt->{i} || ($opt->{smart_case} && $regex_is_lc) ) {
$str = "(?i)$str";
}
my $ok = eval {
qr/$str/
};
my $error = $@;
if ( !$ok ) {
die "Invalid regex '$str':\n $error";
}
return $str;
}
=head2 check_regex( $regex_str )
Checks that the $regex_str can be compiled into a perl regular expression.
Dies with the error message if this is not the case.
No return value.
=cut
sub check_regex {
my $regex = shift;
return unless defined $regex;
eval { qr/$regex/ };
if ($@) {
(my $error = $@) =~ s/ at \S+ line \d+.*//;
chomp($error);
App::Ack::die( "Invalid regex '$regex':\n $error" );
}
return;
}
=head2 warn( @_ )
Put out an ack-specific warning.
=cut
sub warn {
return CORE::warn( _my_program(), ': ', @_, "\n" );
}
=head2 die( @_ )
Die in an ack-specific way.
=cut
sub die {
return CORE::die( _my_program(), ': ', @_, "\n" );
}
sub _my_program {
require File::Basename;
return File::Basename::basename( $0 );
}
=head2 filetypes_supported()
Returns a list of all the types that we can detect.
=cut
sub filetypes_supported {
return keys %mappings;
}
sub _get_thpppt {
my $y = q{_ /|,\\'!.x',=(www)=, U };
$y =~ tr/,x!w/\nOo_/;
return $y;
}
sub _thpppt {
my $y = _get_thpppt();
App::Ack::print( "$y ack $_[0]!\n" );
exit 0;
}
sub _bar {
my $x;
$x = <<'_BAR';
6?!I'7!I"?%+!
3~!I#7#I"7#I!?!+!="+"="+!:!
2?#I!7!I!?#I!7!I"+"=%+"=#
1?"+!?*+!=#~"=!+#?"="+!
0?"+!?"I"?&+!="~!=!~"=!+%="+"
/I!+!?)+!?!+!=$~!=!~!="+!="+"?!="?!
.?%I"?%+%='?!=#~$="
,,!?%I"?(+$=$~!=#:"~$:!~!
,I!?!I!?"I"?!+#?"+!?!+#="~$:!~!:!~!:!,!:!,":#~!
+I!?&+!="+!?#+$=!~":!~!:!~!:!,!:#,!:!,%:"
*+!I!?!+$=!+!=!+!?$+#=!~":!~":#,$:",#:!,!:!
*I!?"+!?!+!=$+!?#+#=#~":$,!:",!:!,&:"
)I!?$=!~!=#+"?!+!=!+!=!~!="~!:!~":!,'.!,%:!~!
(=!?"+!?!=!~$?"+!?!+!=#~"=",!="~$,$.",#.!:!=!
(I"+"="~"=!+&=!~"=!~!,!~!+!=!?!+!?!=!I!?!+"=!.",!.!,":!
%I$?!+!?!=%+!~!+#~!=!~#:#=!~!+!~!=#:!,%.!,!.!:"
$I!?!=!?!I!+!?"+!=!~!=!~!?!I!?!=!+!=!~#:",!~"=!~!:"~!=!:",&:" '-/
$?!+!I!?"+"=!+"~!,!:"+#~#:#,"=!~"=!,!~!,!.",!:".!:! */! !I!t!'!s! !a! !g!r!e!p!!! !/!
$+"=!+!?!+"~!=!:!~!:"I!+!,!~!=!:!~!,!:!,$:!~".&:"~!,# (-/
%~!=!~!=!:!.!+"~!:!,!.!,!~!=!:$.!,":!,!.!:!~!,!:!=!.#="~!,!:" ./!
%=!~!?!+"?"+!=!~",!.!:!?!~!.!:!,!:!,#.!,!:","~!:!=!~!=!:",!~! ./!
%+"~":!~!=#~!:!~!,!.!~!:",!~!=!~!.!:!,!.",!:!,":!=":!.!,!:!7! -/!
%~",!:".#:!=!:!,!:"+!:!~!:!.!,!~!,!.#,!.!,$:"~!,":"~!=! */!
&=!~!=#+!=!~",!.!:",#:#,!.",+:!,!.",!=!+!?!
&~!=!~!=!~!:"~#:",!.!,#~!:!.!+!,!.",$.",$.#,!+!I!?!
&~!="~!:!~":!~",!~!=!~":!,!:!~!,!:!,&.$,#."+!?!I!?!I!
&~!=!~!=!+!,!:!~!:!=!,!:!~&:$,!.!,".!,".!,#."~!+!?$I!
&~!=!~!="~!=!:!~":!,!~%:#,!:",!.!,#.",#I!7"I!?!+!?"I"
&+!I!7!:#~"=!~!:!,!:"~$.!=!.!,!~!,$.#,!~!7!I#?!+!?"I"7!
%7#?!+!~!:!=!~!=!~":!,!:"~":#.!,)7#I"?"I!7&
%7#I!=":!=!~!:"~$:"~!:#,!:!,!:!~!:#,!7#I!?#7)
$7$+!,!~!=#~!:!~!:!~$:#,!.!~!:!=!,":!7#I"?#7+=!?!
$7#I!~!,!~#=!~!:"~!:!,!:!,#:!=!~",":!7$I!?#I!7*+!=!+"
"I!7$I!,":!,!.!=":$,!:!,$:$7$I!+!?"I!7+?"I!7!I!7!,!
!,!7%I!:",!."~":!,&.!,!:!~!I!7$I!+!?"I!7,?!I!7',!
!7(,!.#~":!,%.!,!7%I!7!?#I"7,+!?!7*
7+:!,!~#,"=!7'I!?#I"7/+!7+
77I!+!7!?!7!I"71+!7,
_BAR
$x =~ s/(.)(.)/$1x(ord($2)-32)/eg;
App::Ack::print( $x );
exit 0;
}
=head2 show_help()
Dumps the help page to the user.
=cut
sub show_help {
my $help_arg = shift || 0;
# return show_help_types() if $help_arg =~ /^types?/;
App::Ack::print( <<"END_OF_HELP" );
Usage: ack [OPTION]... PATTERN [FILES OR DIRECTORIES]
Search for PATTERN in each source file in the tree from the current
directory on down. If any files or directories are specified, then
only those files and directories are checked. ack may also search
STDIN, but only if no file or directory arguments are specified,
or if one of them is "-".
Default switches may be specified in ACK_OPTIONS environment variable or
an .ackrc file. If you want no dependency on the environment, turn it
off with --noenv.
Example: ack -i select
Searching:
-i, --ignore-case Ignore case distinctions in PATTERN
--[no]smart-case Ignore case distinctions in PATTERN,
only if PATTERN contains no upper case.
Ignored if -i is specified
-v, --invert-match Invert match: select non-matching lines
-w, --word-regexp Force PATTERN to match only whole words
-Q, --literal Quote all metacharacters; PATTERN is literal
Search output:
--line=NUM Only print line(s) NUM of each file
-l, --files-with-matches
Only print filenames containing matches
-L, --files-without-matches
Only print filenames with no matches
--output=expr Output the evaluation of expr for each line
(turns off text highlighting)
-o Show only the part of a line matching PATTERN
Same as --output='\$&'
--passthru Print all lines, whether matching or not
--match PATTERN Specify PATTERN explicitly.
-m, --max-count=NUM Stop searching in each file after NUM matches
-1 Stop searching after one match of any kind
-H, --with-filename Print the filename for each match
-h, --no-filename Suppress the prefixing filename on output
-c, --count Show number of lines matching per file
--column Show the column number of the first match
-A NUM, --after-context=NUM
Print NUM lines of trailing context after matching
lines.
-B NUM, --before-context=NUM
Print NUM lines of leading context before matching
lines.
-C [NUM], --context[=NUM]
Print NUM lines (default 2) of output context.
--print0 Print null byte as separator between filenames,
only works with -f, -g, -l, -L or -c.
-s Suppress error messages about nonexistent or
unreadable files.
File presentation:
--pager=COMMAND Pipes all ack output through COMMAND. For example,
--pager="less -R". Ignored if output is redirected.
--nopager Do not send output through a pager. Cancels any
setting in ~/.ackrc, ACK_PAGER or ACK_PAGER_COLOR.
--[no]heading Print a filename heading above each file's results.
(default: on when used interactively)
--[no]break Print a break between results from different files.
(default: on when used interactively)
--group Same as --heading --break
--nogroup Same as --noheading --nobreak
--[no]color Highlight the matching text (default: on unless
output is redirected, or on Windows)
--[no]colour Same as --[no]color
--color-filename=COLOR
--color-match=COLOR
--color-lineno=COLOR Set the color for filenames, matches, and line numbers.
--flush Flush output immediately, even when ack is used
non-interactively (when output goes to a pipe or
file).
File finding:
-f Only print the files selected, without searching.
The PATTERN must not be specified.
-g Same as -f, but only select files matching PATTERN.
--sort-files Sort the found files lexically.
--show-types Show which types each file has.
--files-from=FILE Read the list of files to search from FILE.
-x Read the list of files to search from STDIN.
File inclusion/exclusion:
--[no]ignore-dir=name Add/Remove directory from the list of ignored dirs
-r, -R, --recurse Recurse into subdirectories (ack's default behavior)
-n, --no-recurse No descending into subdirectories
--[no]follow Follow symlinks. Default is off.
-k, --known-types Include only files with types that ack recognizes.
--type=X Include only X files, where X is a recognized filetype.
--type=noX Exclude X files.
See "ack --help-types" for supported filetypes.
File type specification:
--type-set TYPE=.EXTENSION[,.EXT2[,...]]
Files with the given EXTENSION(s) are recognized as
being of type TYPE. This replaces an existing
definition for type TYPE.
--type-add TYPE=.EXTENSION[,.EXT2[,...]]
Files with the given EXTENSION(s) are recognized as
being of (the existing) type TYPE
Miscellaneous:
--noenv Ignore environment variables and global ackrc files
--ackrc=filename Specify an ackrc file to use
--ignore-ack-defaults Ignore the default definitions that ack includes.
--create-ackrc Outputs a default ackrc for your customization to standard output.
--help This help
--help-types Display all known types
--dump Dump information on which options are loaded from which RC files
--man Man page
--version Display version & copyright
--thpppt Bill the Cat
--bar The warning admiral
Exit status is 0 if match, 1 if no match.
This is version $VERSION of ack.
END_OF_HELP
return;
}
=head2 show_help_types()
Display the filetypes help subpage.
=cut
sub show_help_types {
App::Ack::print( <<'END_OF_HELP' );
Usage: ack [OPTION]... PATTERN [FILES OR DIRECTORIES]
The following is the list of filetypes supported by ack. You can
specify a file type with the --type=TYPE format, or the --TYPE
format. For example, both --type=perl and --perl work.
Note that some extensions may appear in multiple types. For example,
.pod files are both Perl and Parrot.
END_OF_HELP
my @types = filetypes_supported();
my $maxlen = 0;
for ( @types ) {
$maxlen = length if $maxlen < length;
}
for my $type ( sort @types ) {
next if $type =~ /^-/; # Stuff to not show
my $ext_list = $mappings{$type};
if ( ref $ext_list ) {
$ext_list = join( ' ', map { $_->to_string } @{$ext_list} );
}
App::Ack::print( sprintf( " --[no]%-*.*s %s\n", $maxlen, $maxlen, $type, $ext_list ) );
}
return;
}
sub show_man {
require Pod::Usage;
Pod::Usage::pod2usage({
-input => $App::Ack::orig_program_name,
-verbose => 2,
-exitval => 0,
});
}
sub _listify {
my @whats = @_;
return '' if !@whats;
my $end = pop @whats;
my $str = @whats ? join( ', ', @whats ) . " and $end" : $end;
no warnings 'once';
require Text::Wrap;
$Text::Wrap::columns = 75;
return Text::Wrap::wrap( '', ' ', $str );
}
=head2 get_version_statement
Returns the version information for ack.
=cut
sub get_version_statement {
require Config;
my $copyright = get_copyright();
my $this_perl = $Config::Config{perlpath};
if ($^O ne 'VMS') {
my $ext = $Config::Config{_exe};
$this_perl .= $ext unless $this_perl =~ m/$ext$/i;
}
my $ver = sprintf( '%vd', $^V );
return <<"END_OF_VERSION";
ack $VERSION
Running under Perl $ver at $this_perl
$copyright
This program is free software. You may modify or distribute it
under the terms of the Artistic License v2.0.
END_OF_VERSION
}
=head2 print_version_statement
Prints the version information for ack.
=cut
sub print_version_statement {
App::Ack::print( get_version_statement() );
return;
}
=head2 get_copyright
Return the copyright for ack.
=cut
sub get_copyright {
return $COPYRIGHT;
}
=head2 load_colors
Set default colors, load Term::ANSIColor
=cut
sub load_colors {
eval 'use Term::ANSIColor 3.01 ()';
$ENV{ACK_COLOR_MATCH} ||= 'black on_yellow';
$ENV{ACK_COLOR_FILENAME} ||= 'bold green';
$ENV{ACK_COLOR_LINENO} ||= 'bold yellow';
return;
}
# print subs added in order to make it easy for a third party
# module (such as App::Wack) to redefine the display methods
# and show the results in a different way.
sub print { print {$fh} @_; return; }
sub print_first_filename { App::Ack::print( $_[0], "\n" ); return; }
sub print_blank_line { App::Ack::print( "\n" ); return; }
sub print_separator { App::Ack::print( "--\n" ); return; }
sub print_filename { App::Ack::print( $_[0], $_[1] ); return; }
sub print_line_no { App::Ack::print( $_[0], $_[1] ); return; }
sub print_column_no { App::Ack::print( $_[0], $_[1] ); return; }
sub print_count {
my $filename = shift;
my $nmatches = shift;
my $ors = shift;
my $count = shift;
my $show_filename = shift;
if ($show_filename) {
App::Ack::print( $filename );
App::Ack::print( ':', $nmatches ) if $count;
}
else {
App::Ack::print( $nmatches ) if $count;
}
App::Ack::print( $ors );
return;
}
sub print_count0 {
my $filename = shift;
my $ors = shift;
my $show_filename = shift;
if ($show_filename) {
App::Ack::print( $filename, ':0', $ors );
}
else {
App::Ack::print( '0', $ors );
}
return;
}
sub set_up_pager {
my $command = shift;
return if App::Ack::output_to_pipe();
my $pager;
if ( not open( $pager, '|-', $command ) ) {
App::Ack::die( qq{Unable to pipe to pager "$command": $!} );
}
$fh = $pager;
return;
}
=head2 output_to_pipe()
Returns true if ack's input is coming from a pipe.
=cut
sub output_to_pipe {
return $output_to_pipe;
}
=head2 exit_from_ack
Exit from the application with the correct exit code.
Returns with 0 if a match was found, otherwise with 1. The number of matches is
handed in as the only argument.
=cut
sub exit_from_ack {
my $nmatches = shift;
my $rc = $nmatches ? 0 : 1;
exit $rc;
}
{
my @capture_indices;
my $match_column_number;
sub does_match {
my ( $opt, $line ) = @_;
my $re = $opt->{regex};
my $invert = $opt->{v};
$match_column_number = undef;
@capture_indices = ();
if ( $invert ? $line !~ /$re/ : $line =~ /$re/ ) {
if ( not $invert ) {
use English '-no_match_vars';
$match_column_number = $LAST_MATCH_START[0] + 1;
if ( @LAST_MATCH_START > 1 ) {
@capture_indices = map {
[ $LAST_MATCH_START[$_], $LAST_MATCH_END[$_] ]
} ( 1 .. $#LAST_MATCH_START );
}
}
return 1;
}
else {
return;
}
}
sub get_capture_indices {
return @capture_indices;
}
sub get_match_column {
return $match_column_number;
}
}
sub print_matches_in_resource {
my ( $resource, $opt ) = @_;
my $passthru = $opt->{passthru};
my $max_count = $opt->{m} || -1;
my $nmatches = 0;
my $filename = $resource->name;
my $break = $opt->{break};
my $heading = $opt->{heading};
my $ors = $opt->{print0} ? "\0" : "\n";
my $color = $opt->{color};
my $print_filename = $opt->{show_filename};
my $has_printed_for_this_resource = 0;
App::Ack::iterate($resource, $opt, sub {
if ( App::Ack::does_match($opt, $_) ) {
if( !$has_printed_for_this_resource ) {
if( $break && has_printed_something() ) {
App::Ack::print_blank_line();
}
if( $print_filename) {
if( $heading ) {
my $filename = $resource->name;
if($color) {
$filename = Term::ANSIColor::colored($filename,
$ENV{ACK_COLOR_FILENAME});
}
App::Ack::print_filename( $filename, $ors );
}
}
}
App::Ack::print_line_with_context($opt, $filename, $_, $.);
$has_printed_for_this_resource = 1;
$nmatches++;
$max_count--;
}
elsif ( $passthru ) {
chomp;
if( $break && !$has_printed_for_this_resource && has_printed_something() ) {
App::Ack::print_blank_line();
}
App::Ack::print_line_with_options($opt, $filename, $_, $., ':');
$has_printed_for_this_resource = 1;
}
return $max_count != 0;
});
return $nmatches;
}
sub count_matches_in_resource {
my ( $resource, $opt ) = @_;
my $nmatches = 0;
App::Ack::iterate( $resource, $opt, sub {
++$nmatches if App::Ack::does_match($opt, $_);
return 1;
} );
return $nmatches;
}
sub resource_has_match {
my ( $resource, $opt ) = @_;
my $stash_v = $opt->{v};
$opt->{v} = 0;
my $n = count_matches_in_resource($resource, $opt) > 0;
$opt->{v} = $stash_v;
return $n;
}
{
my @before_ctx_lines;
my @after_ctx_lines;
my $is_iterating;
sub get_context {
if ( not $is_iterating ) {
Carp::croak( 'get_context() called outside of iterate()' );
}
return (
scalar(@before_ctx_lines) ? \@before_ctx_lines : undef,
scalar(@after_ctx_lines) ? \@after_ctx_lines : undef,
);
}
sub iterate {
my ( $resource, $opt, $cb ) = @_;
$is_iterating = 1;
local $opt->{before_context} = $opt->{output} ? 0 : $opt->{before_context};
local $opt->{after_context} = $opt->{output} ? 0 : $opt->{after_context};
my $n_before_ctx_lines = $opt->{before_context} || 0;
my $n_after_ctx_lines = $opt->{after_context} || 0;
my $current_line;
@after_ctx_lines = @before_ctx_lines = ();
if ( $resource->next_text() ) {
$current_line = $_; # prime the first line of input
}
while ( defined $current_line ) {
while ( (@after_ctx_lines < $n_after_ctx_lines) && $resource->next_text() ) {
push @after_ctx_lines, $_;
}
local $_ = $current_line;
local $. = $. - @after_ctx_lines;
last unless $cb->();
push @before_ctx_lines, $current_line;
if($n_after_ctx_lines) {
$current_line = shift @after_ctx_lines;
}
elsif($resource->next_text()) {
$current_line = $_;
}
else {
undef $current_line;
}
shift @before_ctx_lines while @before_ctx_lines > $n_before_ctx_lines;
}
$is_iterating = 0;
return;
}
}
my $has_printed_something;
BEGIN {
$has_printed_something = 0;
}
sub has_printed_something {
return $has_printed_something;
}
sub print_line_with_options {
my ( $opt, $filename, $line, $line_no, $separator ) = @_;
$has_printed_something = 1;
my $print_filename = $opt->{show_filename};
my $print_column = $opt->{column};
my $ors = $opt->{print0} ? "\0" : "\n";
my $heading = $opt->{heading};
my $output_expr = $opt->{output};
my $re = $opt->{regex};
my @line_parts;
if($print_filename) {
if( $heading ) {
push @line_parts, $line_no;
}
else {
push @line_parts, $filename, $line_no;
}
if( $print_column ) {
push @line_parts, get_match_column();
}
}
if( $output_expr ) {
# XXX avoid re-evaluation if we can
while( $line =~ /$re/g ) {
my $output = eval qq{"$output_expr"};
App::Ack::print( join( $separator, @line_parts, $output ), $ors );
}
}
else {
push @line_parts, $line;
App::Ack::print( join( $separator, @line_parts ), $ors );
}
return;
}
{
my $is_first_match;
my $previous_file_processed;
my $previous_line_printed;
BEGIN {
$is_first_match = 1;
$previous_line_printed = -1;
}
sub print_line_with_context {
my ( $opt, $filename, $matching_line, $line_no ) = @_;
my $heading = $opt->{heading};
if( !defined($previous_file_processed) ||
$previous_file_processed ne $filename ) {
$previous_file_processed = $filename;
$previous_line_printed = -1;
if( $heading ) {
$is_first_match = 1;
}
}
my $ors = $opt->{print0} ? "\0" : "\n";
my $color = $opt->{color};
my $match_word = $opt->{w};
my $re = $opt->{regex};
my $is_tracking_context = $opt->{after_context} || $opt->{before_context};
my $output_expr = $opt->{output};
chomp $matching_line;
my ( $before_context, $after_context ) = get_context();
if($before_context) {
my $first_line = $. - @{$before_context};
if( !$is_first_match && $previous_line_printed != $first_line - 1 ) {
App::Ack::print('--', $ors);
}
$previous_line_printed = $.; # XXX unless --after-context
my $offset = @{$before_context};
foreach my $line (@{$before_context}) {
chomp $line;
App::Ack::print_line_with_options($opt, $filename, $line, $. - $offset, '-');
$previous_line_printed = $. - $offset;