Add basic search for string

The search is case insensitive. The terminal display is colorized
thanks to the rainbow gem.

.rspec

@@ -0,0 +1 @@
+--color

README.markdown

@@ -1,17 +1,24 @@
 Ackr
 ================
 
+Ackr is a very light grep/ack/rak replacement for lazy developers.
+
 Description
 -----------
-TODO
+
+TODO. Work in progress.
+
+Run on linux. Maybe run on mac os. I guess it doesn't run on windows.
 
 Install
 -------------------------
 
+    gem install ackr
 
 Usage
 --------------------------
 
+TODO. Work in progress.
 
 
 Dependencies

Rakefile

@@ -10,7 +10,7 @@ task :default => :spec
 
 desc 'Test GEM with rspec'
 RSpec::Core::RakeTask.new(:spec) do |t|
-  t.rspec_opts = ['--color --format documentation']
+  t.rspec_opts = ['--color']
 end
 
 desc 'Check for code smells'

ackr.gemspec

@@ -7,9 +7,9 @@ Gem::Specification.new do |s|
   s.version = File.read('VERSION').strip
   s.authors = ['Xavier Nayrac']
   s.email = 'xavier.nayrac@gmail.com'
-  s.summary = ''
+  s.summary = 'Ackr is a very light grep/ack/rak replacement for lazy developers.'
   s.homepage = ''
-  s.description = %q{}
+  s.description = %q{Ackr is a very light grep/ack/rak replacement for lazy developers.}
 
 	readmes = FileList.new('*') do |list|
 		list.exclude(/(^|[^.a-z])[a-z]+/)
@@ -19,4 +19,5 @@ Gem::Specification.new do |s|
 	s.license = 'MIT'
 	s.required_ruby_version = '>= 1.9.2'
 	s.executables = ['ackr']
+  s.add_dependency 'rainbow', '>= 1.1.4'
 end

bin/ackr

@@ -5,3 +5,16 @@ $LOAD_PATH.unshift File.dirname(__FILE__) + '/../lib'
 $ACKR_PATH = File.expand_path(File.dirname(__FILE__)) + '/..'
 
 require 'ackr'
+
+if ARGV[0].nil?
+  puts "usage:
+
+  ackr search_string
+
+  ...OR...
+
+  ackr /regex/
+  "
+else
+  Ackr::Finder.new(ARGV[0].dup).run
+end

lib/ackr.rb

@@ -1,4 +1,26 @@
 # -*- encoding: utf-8 -*-
 
+require 'ackr/finder'
+require 'ackr/colorizer'
+
 module Ackr
+  # Method taken from: https://github.com/djberg96/ptools
+  # --
+  #
+  # Returns whether or not +file+ is a binary file. Note that this is
+  # not guaranteed to be 100% accurate. It performs a "best guess" based
+  # on a simple test of the first +File.blksize+ characters.
+  #
+  # Example:
+  #
+  # File.binary?('somefile.exe') # => true
+  # File.binary?('somefile.txt') # => false
+  #--
+  # Based on code originally provided by Ryan Davis (which, in turn, is
+  # based on Perl's -B switch).
+  #
+  def self.binary?(file)
+    s = (File.read(file, File.stat(file).blksize) || "").split(//)
+    ((s.size - s.grep(" ".."~").size) / s.size.to_f) > 0.30
+  end
 end

lib/ackr/colorizer.rb

@@ -0,0 +1,32 @@
+# -*- encoding: utf-8 -*-
+
+require 'rainbow'
+
+module Ackr
+
+  # Methods to add terminal color commands into strings.
+  module Colorizer
+
+    # Public: Highlight a filename.
+    #
+    # string - The filename.
+    #
+    # Returns the String filename highlighted.
+    def self.for_file string
+      string.foreground(:blue).bright.underline
+    end
+
+    # Public: Highlight a matched file line.
+    #
+    # string - The line.
+    # search - The String search term.
+    #
+    # Returns the String line highlighted.
+    def self.for_line string, search
+      reg = Regexp.new(search, Regexp::IGNORECASE)
+      string.gsub(reg) do |exp|
+        exp.bright
+      end
+    end
+  end
+end

lib/ackr/finder.rb

@@ -0,0 +1,41 @@
+# -*- encoding: utf-8 -*-
+
+module Ackr
+  class Finder
+
+    def initialize search_term
+      @search_term = search_term.downcase
+    end
+
+    def run
+      Dir.glob('**/*').each do |f|
+        next if File.directory?(f)
+        next if Ackr::binary?(f)
+        @file = f
+        search
+      end
+    end
+
+    private
+
+      def search
+        results = search_into_file
+        unless results.empty?
+          puts Colorizer::for_file(@file)
+          results.each {|r| puts r}
+          puts ""
+        end
+      end
+
+      def search_into_file
+        result = []
+        File.readlines(@file).each_with_index do |line, i|
+          if line.downcase.include?(@search_term)
+            result << "#{'%4i' % i}| #{Colorizer::for_line(line, @search_term)}"
+          end
+        end
+        result
+      end
+
+  end
+end

spec/colorizer_spec.rb

@@ -0,0 +1,35 @@
+# -*- encoding: utf-8 -*-
+
+require './spec/helper'
+
+describe Colorizer do
+
+  describe "#for_file" do
+    it "should colorize filename" do
+      string = "path/to/file"
+      expect = string.foreground(:blue).bright.underline
+      Colorizer::for_file(string).should == expect
+    end
+  end
+
+  describe "#for_line" do
+    it "should colorize matched term" do
+      string = "123 456 789"
+      expect = "123 " + "456".bright + " 789"
+      Colorizer::for_line(string, "456").should == expect
+    end
+
+    it "should colorize matched terms" do
+      string = "123 456 789 456"
+      expect = "123 " + "456".bright + " 789 " + "456".bright
+      Colorizer::for_line(string, "456").should == expect
+    end
+
+    it "should be case insensitive" do
+      string = "AAA BBB CCC"
+      expect = "AAA " + "BBB".bright + " CCC"
+      Colorizer::for_line(string, "bbb").should == expect
+    end
+  end
+end
+