Created
March 3, 2015 14:51
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A multiline grep.
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| class MultiGrep | |
| def usage | |
| puts "Example: ruby multi_grep.rb base.php:10-20 search/*.php" | |
| end | |
| def grep(argv = ARGV) | |
| base = argv.first | |
| path, range = base.split(":") | |
| s, e = range.split("-").map { |i| i.to_i } | |
| File.open(path) do |f| | |
| base_lines = f.readlines[s-1..e-1].map { |line| line.rstrip } | |
| base_line = base_lines.first | |
| array_size = base_lines.size | |
| argv[1..-1].each do |path| | |
| File.open(path) do |f| | |
| lines = f.readlines.map { |line| line.rstrip } | |
| lines.each_with_index do |line, i| | |
| if line == base_line && match(lines, base_lines, i, i + array_size - 1) | |
| puts "#{path}:#{i+1}-#{i+array_size}" | |
| end | |
| end | |
| end | |
| end | |
| end | |
| end | |
| private | |
| def match(lines, base_lines, start_index, end_index) | |
| base_lines == lines[start_index..end_index] | |
| end | |
| end | |
| if __FILE__ == $0 | |
| if ARGV.first =~ /(.+):[\d]+-[\d]+/ | |
| MultiGrep.new.grep | |
| else | |
| MultiGrep.new.usage | |
| end | |
| end |
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