forked from beyondgrep/ack1
/
Ack.pm
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/
Ack.pm
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package App::Ack;
use warnings;
use strict;
use File::Next 0.40;
use App::Ack::Plugin::Basic;
=head1 NAME
App::Ack - A container for functions for the ack program
=head1 VERSION
Version 1.86
=cut
our $VERSION;
our $COPYRIGHT;
BEGIN {
$VERSION = '1.86';
$COPYRIGHT = 'Copyright 2005-2008 Andy Lester, all rights reserved.';
}
our $fh;
BEGIN {
$fh = *STDOUT;
}
our %types;
our %type_wanted;
our %mappings;
our %ignore_dirs;
our $dir_sep_chars;
our $is_cygwin;
our $is_windows;
our $to_screen;
use File::Spec ();
use File::Glob ':glob';
use Getopt::Long ();
BEGIN {
%ignore_dirs = (
'.bzr' => 'Bazaar',
'.cdv' => 'Codeville',
'~.dep' => 'Interface Builder',
'~.dot' => 'Interface Builder',
'~.nib' => 'Interface Builder',
'~.plst' => 'Interface Builder',
'.git' => 'Git',
'.hg' => 'Mercurial',
'.pc' => 'quilt',
'.svn' => 'Subversion',
blib => 'Perl module building',
CVS => 'CVS',
RCS => 'RCS',
SCCS => 'SCCS',
_darcs => 'darcs',
_sgbak => 'Vault/Fortress',
'autom4te.cache' => 'autoconf',
'cover_db' => 'Devel::Cover',
_build => 'Module::Build',
);
%mappings = (
actionscript => [qw( as mxml )],
asm => [qw( asm s )],
batch => [qw( bat cmd )],
binary => q{Binary files, as defined by Perl's -B op (default: off)},
cc => [qw( c h xs )],
cfmx => [qw( cfc cfm cfml )],
cpp => [qw( cpp cc cxx m hpp hh h hxx )],
csharp => [qw( cs )],
css => [qw( css )],
elisp => [qw( el )],
erlang => [qw( erl )],
fortran => [qw( f f77 f90 f95 f03 for ftn fpp )],
haskell => [qw( hs lhs )],
hh => [qw( h )],
html => [qw( htm html shtml xhtml )],
java => [qw( java properties )],
js => [qw( js )],
jsp => [qw( jsp jspx jhtm jhtml )],
lisp => [qw( lisp lsp )],
lua => [qw( lua )],
make => q{Makefiles},
mason => [qw( mas mhtml mpl mtxt )],
objc => [qw( m h )],
objcpp => [qw( mm h )],
ocaml => [qw( ml mli )],
parrot => [qw( pir pasm pmc ops pod pg tg )],
perl => [qw( pl pm pod t )],
php => [qw( php phpt php3 php4 php5 )],
plone => [qw( pt cpt metadata cpy py )],
python => [qw( py )],
rake => q{Rakefiles},
ruby => [qw( rb rhtml rjs rxml erb rake )],
scheme => [qw( scm )],
shell => [qw( sh bash csh tcsh ksh zsh )],
skipped => q{Files, but not directories, normally skipped by ack (default: off)},
smalltalk => [qw( st )],
sql => [qw( sql ctl )],
tcl => [qw( tcl itcl itk )],
tex => [qw( tex cls sty )],
text => q{Text files, as defined by Perl's -T op (default: off)},
tt => [qw( tt tt2 ttml )],
vb => [qw( bas cls frm ctl vb resx )],
vim => [qw( vim )],
yaml => [qw( yaml yml )],
xml => [qw( xml dtd xslt ent )],
);
while ( my ($type,$exts) = each %mappings ) {
if ( ref $exts ) {
for my $ext ( @{$exts} ) {
push( @{$types{$ext}}, $type );
}
}
}
$is_cygwin = ($^O eq 'cygwin');
$is_windows = ($^O =~ /MSWin32/);
$to_screen = -t *STDOUT;
$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 read_ackrc {
my @files = ( $ENV{ACKRC} );
my @dirs =
$is_windows
? ( $ENV{HOME}, $ENV{USERPROFILE} )
: ( '~', $ENV{HOME} );
for my $dir ( grep { defined } @dirs ) {
for my $file ( '.ackrc', '_ackrc' ) {
push( @files, bsd_glob( "$dir/$file", GLOB_TILDE ) );
}
}
for my $filename ( @files ) {
if ( defined $filename && -e $filename ) {
open( my $fh, '<', $filename ) or App::Ack::die( "$filename: $!\n" );
my @lines = grep { /./ && !/^\s*#/ } <$fh>;
chomp @lines;
close $fh or App::Ack::die( "$filename: $!\n" );
return @lines;
}
}
return;
}
=head2 get_command_line_options()
Gets command-line arguments and does the Ack-specific tweaking.
=cut
sub get_command_line_options {
my %opt = (
pager => $ENV{ACK_PAGER_COLOR} || $ENV{ACK_PAGER},
);
my $getopt_specs = {
1 => sub { $opt{1} = $opt{m} = 1 },
'A|after-context=i' => \$opt{after_context},
'B|before-context=i' => \$opt{before_context},
'C|context:i' => sub { shift; my $val = shift; $opt{before_context} = $opt{after_context} = ($val || 2) },
'a|all-types' => \$opt{all},
'break!' => \$opt{break},
c => \$opt{count},
'color|colour!' => \$opt{color},
count => \$opt{count},
'env!' => sub { }, # ignore this option, it is handled beforehand
f => \$opt{f},
flush => \$opt{flush},
'follow!' => \$opt{follow},
'g=s' => sub { shift; $opt{G} = shift; $opt{f} = 1 },
'G=s' => \$opt{G},
'group!' => sub { shift; $opt{heading} = $opt{break} = shift },
'heading!' => \$opt{heading},
'h|no-filename' => \$opt{h},
'H|with-filename' => \$opt{H},
'i|ignore-case' => \$opt{i},
'lines=s' => sub { shift; my $val = shift; push @{$opt{lines}}, $val },
'l|files-with-matches' => \$opt{l},
'L|files-without-match' => sub { $opt{l} = $opt{v} = 1 },
'm|max-count=i' => \$opt{m},
'match=s' => \$opt{regex},
n => \$opt{n},
o => sub { $opt{output} = '$&' },
'output=s' => \$opt{output},
'pager=s' => \$opt{pager},
'nopager' => sub { $opt{pager} = undef },
'passthru' => \$opt{passthru},
'print0' => \$opt{print0},
'Q|literal' => \$opt{Q},
'smart-case!' => \$opt{smart_case},
'sort-files' => \$opt{sort_files},
'u|unrestricted' => \$opt{u},
'v|invert-match' => \$opt{v},
'w|word-regexp' => \$opt{w},
'ignore-dirs=s' => sub { shift; my $dir = remove_dir_sep( shift ); $ignore_dirs{$dir} = '--ignore-dirs' },
'noignore-dirs=s' => sub { shift; my $dir = remove_dir_sep( shift ); delete $ignore_dirs{$dir} },
'version' => sub { print_version_statement(); exit 1; },
'help|?:s' => sub { shift; show_help(@_); exit; },
'help-types'=> sub { show_help_types(); exit; },
'man' => sub { require Pod::Usage; Pod::Usage::pod2usage({-verbose => 2}); exit; },
'type=s' => sub {
# Whatever --type=xxx they specify, set it manually in the hash
my $dummy = shift;
my $type = shift;
my $wanted = ($type =~ s/^no//) ? 0 : 1; # must not be undef later
if ( exists $type_wanted{ $type } ) {
$type_wanted{ $type } = $wanted;
}
else {
App::Ack::die( qq{Unknown --type "$type"} );
}
}, # type sub
};
# Stick any default switches at the beginning, so they can be overridden
# by the command line switches.
unshift @ARGV, split( ' ', $ENV{ACK_OPTIONS} ) if defined $ENV{ACK_OPTIONS};
# first pass through options, looking for type definitions
def_types_from_ARGV();
for my $i ( filetypes_supported() ) {
$getopt_specs->{ "$i!" } = \$type_wanted{ $i };
}
my $parser = Getopt::Long::Parser->new();
$parser->configure( 'bundling', 'no_ignore_case', );
$parser->getoptions( %{$getopt_specs} ) or
App::Ack::die( 'See ack --help or ack --man for options.' );
my %defaults = (
all => 0,
color => $to_screen,
follow => 0,
break => $to_screen,
heading => $to_screen,
before_context => 0,
after_context => 0,
);
if ( $is_windows && $defaults{color} && not $ENV{ACK_PAGER_COLOR} ) {
if ( $ENV{ACK_PAGER} || not eval { require Win32::Console::ANSI } ) {
$defaults{color} = 0;
}
}
if ( $to_screen && $ENV{ACK_PAGER_COLOR} ) {
$defaults{color} = 1;
}
while ( my ($key,$value) = each %defaults ) {
if ( not defined $opt{$key} ) {
$opt{$key} = $value;
}
}
if ( defined $opt{m} && $opt{m} <= 0 ) {
App::Ack::die( '-m must be greater than zero' );
}
for ( qw( before_context after_context ) ) {
if ( defined $opt{$_} && $opt{$_} < 0 ) {
App::Ack::die( "--$_ may not be negative" );
}
}
if ( defined( my $val = $opt{output} ) ) {
$opt{output} = eval qq[ sub { "$val" } ];
}
if ( defined( my $l = $opt{lines} ) ) {
# --line=1 --line=5 is equivalent to --line=1,5
my @lines = split( /,/, join( ',', @{$l} ) );
# --line=1-3 is equivalent to --line=1,2,3
@lines = map {
my @ret;
if ( /-/ ) {
my ($from, $to) = split /-/, $_;
if ( $from > $to ) {
App::Ack::warn( "ignoring --line=$from-$to" );
@ret = ();
}
else {
@ret = ( $from .. $to );
}
}
else {
@ret = ( $_ );
};
@ret
} @lines;
if ( @lines ) {
my %uniq;
@uniq{ @lines } = ();
$opt{lines} = [ sort { $a <=> $b } keys %uniq ]; # numerical sort and each line occurs only once!
}
else {
# happens if there are only ignored --line directives
App::Ack::die( 'All --line options are invalid.' );
}
}
return \%opt;
}
=head2 def_types_from_ARGV
Go through the command line arguments and look for
I<--type-set foo=.foo,.bar> and I<--type-add xml=.rdf>.
Remove them from @ARGV and add them to the supported filetypes,
i.e. into %mappings, etc.
=cut
sub def_types_from_ARGV {
my @typedef;
my $parser = Getopt::Long::Parser->new();
# pass_through => leave unrecognized command line arguments alone
# no_auto_abbrev => otherwise -c is expanded and not left alone
$parser->configure( 'no_ignore_case', 'pass_through', 'no_auto_abbrev' );
$parser->getoptions(
'type-set=s' => sub { shift; push @typedef, ['c', shift] },
'type-add=s' => sub { shift; push @typedef, ['a', shift] },
) or App::Ack::die( 'See ack --help or ack --man for options.' );
for my $td (@typedef) {
my ($type, $ext) = split /=/, $td->[1];
if ( $td->[0] eq 'c' ) {
# type-set
if ( exists $mappings{$type} ) {
# can't redefine types 'make', 'skipped', 'text' and 'binary'
App::Ack::die( qq{--type-set: Builtin type "$type" cannot be changed.} )
if ref $mappings{$type} ne 'ARRAY';
delete_type($type);
}
}
else {
# type-add
# can't append to types 'make', 'skipped', 'text' and 'binary'
App::Ack::die( qq{--type-add: Builtin type "$type" cannot be changed.} )
if exists $mappings{$type} && ref $mappings{$type} ne 'ARRAY';
App::Ack::warn( qq{--type-add: Type "$type" does not exist, creating with "$ext" ...} )
unless exists $mappings{$type};
}
my @exts = split /,/, $ext;
s/^\.// for @exts;
if ( !exists $mappings{$type} || ref($mappings{$type}) eq 'ARRAY' ) {
push @{$mappings{$type}}, @exts;
for my $e ( @exts ) {
push @{$types{$e}}, $type;
}
}
else {
App::Ack::die( qq{Cannot append to type "$type".} );
}
}
return;
}
=head2 delete_type
Removes a type from the internal structures containing type
information: %mappings, %types and %type_wanted.
=cut
sub delete_type {
my $type = shift;
App::Ack::die( qq{Internal error: Cannot delete builtin type "$type".} )
unless ref $mappings{$type} eq 'ARRAY';
delete $mappings{$type};
delete $type_wanted{$type};
for my $ext ( keys %types ) {
$types{$ext} = [ grep { $_ ne $type } @{$types{$ext}} ];
}
}
=head2 ignoredir_filter
Standard filter to pass as a L<File::Next> descend_filter. It
returns true if the directory is any of the ones we know we want
to ignore.
=cut
sub ignoredir_filter {
return !exists $ignore_dirs{$_};
}
=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 filetypes( $filename )
Returns a list of types that I<$filename> could be. For example, a file
F<foo.pod> could be "perl" or "parrot".
The filetype will be C<undef> if we can't determine it. This could
be if the file doesn't exist, or it can't be read.
It will be 'skipped' if it's something that ack should avoid searching,
even under -a.
=cut
use constant TEXT => 'text';
sub filetypes {
my $filename = shift;
return 'skipped' unless is_searchable( $filename );
my $basename = $filename;
$basename =~ s{.*[$dir_sep_chars]}{};
return ('make',TEXT) if lc $basename eq 'makefile';
return ('rake','ruby',TEXT) if lc $basename eq 'rakefile';
# If there's an extension, look it up
if ( $filename =~ m{\.([^\.$dir_sep_chars]+)$}o ) {
my $ref = $types{lc $1};
return (@{$ref},TEXT) if $ref;
}
# At this point, we can't tell from just the name. Now we have to
# open it and look inside.
return unless -e $filename;
# From Elliot Shank:
# I can't see any reason that -r would fail on these-- the ACLs look
# fine, and no program has any of them open, so the busted Windows
# file locking model isn't getting in there. If I comment the if
# statement out, everything works fine
# So, for cygwin, don't bother trying to check for readability.
if ( !$is_cygwin ) {
if ( !-r $filename ) {
App::Ack::warn( "$filename: Permission denied" );
return;
}
}
return 'binary' if -B $filename;
# If there's no extension, or we don't recognize it, check the shebang line
my $fh;
if ( !open( $fh, '<', $filename ) ) {
App::Ack::warn( "$filename: $!" );
return;
}
my $header = <$fh>;
close $fh;
if ( $header =~ /^#!/ ) {
return ($1,TEXT) if $header =~ /\b(ruby|p(?:erl|hp|ython))\b/;
return ('shell',TEXT) if $header =~ /\b(?:ba|t?c|k|z)?sh\b/;
}
else {
return ('xml',TEXT) if $header =~ /\Q<?xml /i;
}
return (TEXT);
}
=head2 is_searchable( $filename )
Returns true if the filename is one that we can search, and false
if it's one that we should skip like a coredump or a backup file.
Recognized files:
/~$/ - Unix backup files
/#.+#$/ - Emacs swap files
/[._].*\.swp$/ - Vi(m) swap files
/core\.\d+$/ - core dumps
=cut
sub is_searchable {
my $filename = shift;
# If these are updated, update the --help message
return if $filename =~ /[.]bak$/;
return if $filename =~ /~$/;
return if $filename =~ m{[$dir_sep_chars]?(?:#.+#|core\.\d+|[._].*\.swp)$}o;
return 1;
}
=head2 build_regex( $str, \%opts )
Returns a regex object based on a string and command-line options.
=cut
sub build_regex {
my $str = shift;
my $opt = shift;
$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";
}
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 { ## no critic (ProhibitBuiltinHomonyms)
return CORE::warn( _my_program(), ': ', @_, "\n" );
}
=head2 die( @_ )
Die in an ack-specific way.
=cut
sub die { ## no critic (ProhibitBuiltinHomonyms)
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 _key {
my $str = lc shift;
$str =~ s/[^a-z]//g;
return $str;
}
=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?/;
my $ignore_dirs = _listify( sort { _key($a) cmp _key($b) } keys %ignore_dirs );
App::Ack::print( <<"END_OF_HELP" );
Usage: ack [OPTION]... PATTERN [FILES]
Search for PATTERN in each source file in the tree from cwd on down.
If [FILES] is specified, then only those files/directories are checked.
ack may also search STDIN, but only if no FILES are specified, or if
one of FILES 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-match
Only print filenames with no match
-o Show only the part of a line matching PATTERN
(turns off text highlighting)
--passthru Print all lines, whether matching or not
--output=expr Output the evaluation of expr for each line
(turns off text highlighting)
--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
-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.
File presentation:
--pager=COMMAND Pipes all ack output through COMMAND.
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
--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 found, without searching.
The PATTERN must not be specified.
-g REGEX Same as -f, but only print files matching REGEX.
--sort-files Sort the found files lexically.
File inclusion/exclusion:
-a, --all-types All file types searched;
Ignores CVS, .svn and other ignored directories
-u, --unrestricted All files and directories searched
--[no]ignore-dir=name Add/Remove directory from the list of ignored dirs
-n No descending into subdirectories
-G REGEX Only search files that match REGEX
--perl Include only Perl files.
--type=perl Include only Perl files.
--noperl Exclude Perl files.
--type=noperl Exclude Perl files.
See "ack --help type" for supported filetypes.
--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
--[no]follow Follow symlinks. Default is off.
Directories ignored by default:
$ignore_dirs
Files not checked for type:
/~\$/ - Unix backup files
/#.+#\$/ - Emacs swap files
/[._].*\\.swp\$/ - Vi(m) swap files
/core\\.\\d+\$/ - core dumps
Miscellaneous:
--noenv Ignore environment variables and ~/.ackrc
--help This help
--man Man page
--version Display version & copyright
--thpppt Bill the Cat
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]
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 ) {
$ext_list = join( ' ', map { ".$_" } @{$ext_list} );
}
App::Ack::print( sprintf( " --[no]%-*.*s %s\n", $maxlen, $maxlen, $type, $ext_list ) );
}
return;
}
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 {
my $copyright = get_copyright();
return <<"END_OF_VERSION";
ack $VERSION
$copyright
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
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 ()';
$ENV{ACK_COLOR_MATCH} ||= 'black on_yellow';
$ENV{ACK_COLOR_FILENAME} ||= 'bold green';
return;
}
=head2 is_interesting
File type filter, filtering based on the wanted file types
=cut
sub is_interesting {
return if /^\./;
my $include;
for my $type ( filetypes( $File::Next::name ) ) {
if ( defined $type_wanted{$type} ) {
if ( $type_wanted{$type} ) {
$include = 1;
}
else {
return;
}
}
}
return $include;
}
# print subs added in order to make it easy for a third party
# module (such as App::Wack) to redefine the display methods
# and show the results in a different way.
sub print { print {$fh} @_ }
sub print_first_filename { App::Ack::print( $_[0], "\n" ) }
sub print_blank_line { App::Ack::print( "\n" ) }
sub print_separator { App::Ack::print( "--\n" ) }
sub print_filename { App::Ack::print( $_[0], $_[1] ) }
sub print_line_no { App::Ack::print( $_[0], $_[1] ) }
sub print_count {
my $filename = shift;
my $nmatches = shift;
my $ors = shift;
my $count = shift;
App::Ack::print( $filename );
App::Ack::print( ':', $nmatches ) if $count;
App::Ack::print( $ors );
}
sub print_count0 {
my $filename = shift;
my $ors = shift;
App::Ack::print( $filename, ':0', $ors );
}
=head2 search_resource( $resource, \%opt )
Main search method.
Assumes an open resource, and that the caller will close the resource.
=cut
{
my $filename;
my $regex;
my $display_filename;
my $keep_context;
my $last_output_line; # number of the last line that has been output
my $any_output; # has there been any output for the current file yet
my $context_overall_output_count; # has there been any output at all
sub search_resource {
my $res = shift;
my $opt = shift;
$filename = $res->name();
my $v = $opt->{v};
my $passthru = $opt->{passthru};
my $max = $opt->{m};
my $nmatches = 0;
$display_filename = undef;
# for --line processing
my $has_lines = 0;
my @lines;
if ( defined $opt->{lines} ) {
$has_lines = 1;
@lines = ( @{$opt->{lines}}, -1 );
undef $regex; # Don't match when printing matching line
}
else {
$regex = qr/$opt->{regex}/;
}
# for context processing
$last_output_line = -1;
$any_output = 0;
my $before_context = $opt->{before_context};
my $after_context = $opt->{after_context};
$keep_context = ($before_context || $after_context) && !$passthru;
my @before;
my $before_starts_at_line;
my $after = 0; # number of lines still to print after a match
while ( $res->next_text ) {
# XXX Optimize away the case when there are no more @lines to find.
# XXX $has_lines, $passthru and $v never change. Optimize.