From: William James <w_a_x_man@...>
Date: 2006-02-08T05:43:22+09:00
Subject: Re: Grep via Ruby

ralf wrote:
> Hi,
> I'd like to have a "grep" with case-insensitive match. normal grep does
> not have this functionality (afaik), but ruby does. So this is, what i
> wrote:
>
> cat rgrep:
> #!/usr/bin/env ruby
> # Grep with full regexp-functionality via ruby
>
> if ARGV.shift == "-p"
>   pattern = Regexp.new(ARGV.shift)
> else
>   puts "Please give me a pattern with the '-p' option"
>   exit
> end
> ARGV.each do |filename|
>   File.open(filename) do |file|
>     file.each do |line|
>       puts "#{filename} #{file.lineno.to_s}: #{line}" if
> pattern.match(line)
>     end
>   end
> end
>
> Using it via: rgrep -p '/delete /i' *.php does not match anything, but
> this
> #!/usr/bin/env ruby
> # Grep with full regexp-functionality via ruby
>
> if ARGV.shift == "-p"
>   pattern = Regexp.new(ARGV.shift)
> else
>   puts "Please give me a pattern with the '-p' option"
>   exit
> end
> ARGV.each do |filename|
>   File.open(filename) do |file|
>     file.each do |line|
>       puts "#{filename} #{file.lineno.to_s}: #{line}" if /delete
> /i.match(line)
>     end
>   end
> end
>
> DOES match. Does anyone see the bug? Maybe this can be done a lot
> easier by using ARGF??


if ARGV.shift == "-p"
  pattern = Regexp.new(ARGV.shift,Regexp::IGNORECASE)
else
  puts "Please give me a pattern with the '-p' option"
  exit
end

puts "#{$FILENAME} #{$.}: #{$_}"  if $_ =~ pattern  while gets