From 0d1f16622eb97c280a9dd7953381e6b279ac626f Mon Sep 17 00:00:00 2001
From: Tom Feist <shabble@metavore.org>
Date: Thu, 2 Feb 2012 14:15:25 +0000
Subject: mostly refixified grep.pl: building regex in different way

---
 fixery/grep.pl | 142 +++++++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 102 insertions(+), 40 deletions(-)

diff --git a/fixery/grep.pl b/fixery/grep.pl
index 0215bca..ef5d043 100644
--- a/fixery/grep.pl
+++ b/fixery/grep.pl
@@ -10,73 +10,135 @@
 use Irssi;
 use strict;
 use Text::ParseWords;
-use vars qw($VERSION %IRSSI);
-$VERSION = "2.1";
-%IRSSI = (
-	authors	    => "Timo \'cras\' Sirainen, Wouter Coekaerts",
-	contact	    => "tss\@iki.fi, wouter\@coekaerts.be",
+
+my $HELP_SUMMARY = "GREP [-i] [-w] [-v] [-F] <perl-regex> /irssi-command";
+
+our $VERSION = "2.1";
+our %IRSSI = (
+	authors	    => "Timo 'cras' Sirainen, Wouter Coekaerts, Tom Feist",
+	contact	    => 'tss@iki.fi, wouter@coekaerts.be',
 	name        => "grep",
-	description => "/GREP [-i] [-w] [-v] [-F] <perl-regexp> <command to run>",
+	description => $HELP_SUMMARY,
 	license     => "Public Domain",
 	url         => "http://wouter.coekaerts.be/irssi/",
-	changed	    => "2008-01-13"
+	changed	    => "2012-02-02"
 );
 
-my ($match, $v);
+my $HELP_TEXT
+  = [ $HELP_SUMMARY,
+      "",
+      "The following options are supported:",
+      " \x{02}-i\x{02}: match case insensitively",
+      " \x{02}-w\x{02}: only print matches that form whole words",
+      " \x{02}-v\x{02}: Invert the sense of matching, to print non-matching lines.",
+      " \x{02}-F\x{02}: match as a fixed string, not a regexp",
+      "",
+      "Examples:",
+      "",
+      " \x{02}*\x{02} /GREP -i bacon /echo I LOVE BACON",
+      "",
+      "if you want /FGREP, do: /alias FGREP GREP -F"
+    ];
+
+my $match_pattern;
+my $match_count = 0;
+
+my $options = { };
 
-sub sig_text {
+sub sig_grep_text {
 	my ($dest, $text, $stripped_text) = @_;
-	Irssi::signal_stop() if (($stripped_text =~ /$match/) == $v);
+
+    if ($stripped_text =~ $match_pattern) {
+
+        if (not $options->{'-v'}) {
+            $match_count++;
+            return;
+        }
+    }
+
+    Irssi::signal_stop;
 }
 
 sub cmd_grep {
-	my ($data,$server,$item) = @_;
-	my ($option,$cmd,$i,$w,$F);
-	$v = 0;
-	$F = 0;
+	my ($data, $server, $item) = @_;
+
+    if ($data =~ m/^\s*$/) {
+
+        Irssi::print("\x{02}GREP Error\x{02} Invalid arguments. "
+                     . "Usage: $HELP_SUMMARY", MSGLEVEL_CLIENTERROR);
+        return;
+    }
+
+    $options = { map { $_ => 0 } qw/-i -v -w -F/ };
 
 	# split the arguments, keep quotes
-	my (@args)  = &quotewords(' ', 1, $data);
+	my @args = quotewords(' ', 1, $data);
 
 	# search for options
-	while ($args[0] =~ /^-/) {
-		$option = shift(@args);
-		if ($option eq '-i') {$i = 1;}
-		elsif ($option eq '-v') {$v = 1;}
-		elsif ($option eq '-w') {$w = 1;}
-		elsif ($option eq '-F') {$F = 1;}
-		else {
-			Irssi::print("Unknown option: $option",MSGLEVEL_CLIENTERROR);
+	while ($args[0] =~ /^-\w/) {
+
+        my $opt_arg = shift @args;
+
+        if (exists $options->{$opt_arg}) {
+            $options->{$opt_arg} = 1;
+        } else {
+            Irssi::print("Unknown option: $opt_arg", MSGLEVEL_CLIENTERROR);
 			return;
 		}
 	}
 
 	# match = first argument, but remove quotes
-	($match) = &quotewords(' ', 0, shift(@args));
+	my ($match_str) = quotewords(' ', 0, shift @args);
+    print "Match string >>$match_str<<";
+
 	# cmd = the rest (with quotes)
-	$cmd = join(' ',@args);
+	my $cmd = join(' ', @args);
 
-	# check if the regexp is valid
-	eval("'' =~ /$match/");
-	if($@) { # there was an error
-		chomp $@;
-		Irssi::print($@,MSGLEVEL_CLIENTERROR);
-		return;
-	}
+    print "CMD >>$cmd<<";
 
-	if ($F) {
-		$match =~ s/(\(|\)|\[|\]|\{|\}|\\|\*|\.|\?|\|)/\\$1/g;
+	if ($options->{'-F'}) {
+        $match_str = quotemeta($match_str);
 	}
-	if ($w) {
-		$match = '\b' . $match . '\b';
+
+	if ($options->{'-w'}) {
+        $match_str = '\b' . $match_str . '\b';
 	}
-	if ($i) {
-		$match = '(?i)' . $match;
+
+	if ($options->{'-i'}) {
+		$match_str = '(?i)' . $match_str;
 	}
 
-	Irssi::signal_add_first('print text', 'sig_text');
+    $match_pattern = eval {
+        qr/$match_str/;
+    };
+
+    if ($@) {
+		chomp $@;
+		Irssi::print("\x{02}Invalid pattern\x{02}: $@", MSGLEVEL_CLIENTERROR);
+		return;
+    }
+
+    $match_count = 0;
+
+	Irssi::signal_add_first('print text', 'sig_grep_text');
 	Irssi::signal_emit('send command', $cmd, $server, $item);
-	Irssi::signal_remove('print text', 'sig_text');
+	Irssi::signal_remove('print text', 'sig_grep_text');
+
+    if ($match_count > 0) {
+        Irssi::print(sprintf("Matched %d entr%s", $match_count,
+                             $match_count == 1?"y":"ies"),
+                     MSGLEVEL_CLIENTCRAP);
+    } else {
+        Irssi::print("No matches", MSGLEVEL_CLIENTCRAP);
+    }
+}
+
+sub cmd_help_intercept_grep {
+    if ($_[0] =~ m/grep/i) {
+        Irssi::print($_, MSGLEVEL_CLIENTCRAP) for (@$HELP_TEXT);
+        Irssi::signal_stop;
+    }
 }
 
 Irssi::command_bind('grep', 'cmd_grep');
+Irssi::command_bind('help', 'cmd_help_intercept_grep');
-- 
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