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grec: grep grep-context
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#!/usr/bin/env perl | |
# grec: grep grep-context | |
# $ grep -C 5 foo * | grec grep bar | |
# ( grep 'bar' from contextual output with 'foo' while maintaining context ) | |
# ( grec understands grep, rg, and ag ) | |
# Author: Gerald Lai | |
# License: 0BSD | |
use warnings; | |
use strict; | |
use File::Temp qw(tempfile); | |
my $color = 1; | |
if (@ARGV && $ARGV[0] =~ /^--(no)?color$/) { | |
$color = !$1; | |
shift @ARGV; | |
} | |
my $new_group = 1; | |
my @groups; | |
my @lines; # 0th not used | |
my $i = 0; | |
my ($IN, $infile) = tempfile("grec-XXXX", TMPDIR => 1); | |
while (<STDIN>) { | |
chomp; | |
if ($_ eq "--") { | |
$new_group = 1; | |
next; | |
} | |
++$i; | |
if ($new_group) { | |
push @groups, []; | |
$new_group = 0; | |
} | |
my $group = $groups[-1]; | |
if (!defined $group->[0]) { | |
$group->[0] = $group->[1] = $i; | |
} else { | |
$group->[1] = $i; | |
} | |
# grep path:line:col: prefix | |
my $prefix = s{^([^:]+?[-:]\d+[-:](?:\d+[-:])?)}{} ? $1 : ""; | |
$lines[$i] = [ $prefix, $_, $#groups ]; | |
print $IN $_, "\n"; | |
} | |
close $IN; | |
my $grep = shift @ARGV; | |
my $is_ag = ($grep =~ /\bag$/); | |
my $num_arg = $is_ag ? "--numbers" : "-n"; | |
my @cmd = ($grep, $num_arg); | |
if ($color && -t STDOUT) { | |
push @cmd, $is_ag ? "--color" : "--color=always"; | |
} | |
unshift @ARGV, @cmd; | |
push @ARGV, $infile; | |
my %seen_group; | |
open(my $OUT, "-|", @ARGV) or die("Failed to read from (@ARGV): $!"); | |
while (<$OUT>) { | |
chomp; | |
s{^([^:]+):}{}; | |
my $n = $1; | |
$n =~ s/\e([^\[\]]|\[.*?[a-zA-Z]|\].*?\a)//g; # remove escape | |
$lines[$n][1] = $_; | |
++$seen_group{ $lines[$n][2] }; | |
} | |
close $OUT; | |
for my $j (sort { $a <=> $b } keys %seen_group) { | |
my $group = $groups[$j]; | |
for my $i ($group->[0] .. $group->[1]) { | |
print $lines[$i][0], $lines[$i][1], "\n"; | |
} | |
print "--\n"; | |
} | |
exit 0; |
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There is a repo for this now: https://github.com/geraldlai/grec