Merge pull request #19 from jacargentina/grep

Implemented grep support

lib/grit.rb

@@ -47,6 +47,7 @@
 require 'grit/submodule'
 require 'grit/blame'
 require 'grit/merge'
+require 'grit/grep'
 
 module Grit
   VERSION = '2.5.0'

lib/grit/grep.rb

@@ -0,0 +1,21 @@
+module Grit
+
+  class Grep
+
+    attr_reader :repo
+    attr_reader :filename
+    attr_reader :startline
+    attr_reader :content
+    attr_reader :is_binary
+
+    def initialize(repo, filename, startline, content, is_binary)
+      @repo   = repo
+      @filename = filename
+      @startline = startline.to_i
+      @content = content
+      @is_binary = is_binary
+    end
+
+  end
+
+end

lib/grit/repo.rb

@@ -713,6 +713,44 @@ def rename(name)
       end
     end
 
+    def grep(searchtext, contextlines = 3, branch = 'master')
+      context_arg = '-C ' + contextlines.to_s
+      result = git.native(:grep, {}, '-n', '-E', '-i', '-z', '--heading', '--break', context_arg, searchtext, branch).force_encoding('UTF-8')
+      greps = []
+      filematches = result.split("\n\n")
+      filematches.each do |filematch|
+        binary = false
+        file = ''
+        matches = filematch.split("--\n")
+        matches.each_with_index do |match, i|
+          content = []
+          startline = 0
+          lines = match.split("\n")
+          if i == 0
+            text = lines.first
+            lines.slice!(0)
+            file = text[/^Binary file (.+) matches$/]
+            if file
+              binary = true
+            else
+              text.slice! /^#{branch}:/
+              file = text
+            end
+          end
+          lines.each_with_index do |line, j|
+            line.chomp!
+            number, text = line.split("\0", 2)
+            if j == 0
+              startline = number.to_i
+            end
+            content << text
+          end
+          greps << Grit::Grep.new(self, file, startline, content, binary)
+        end
+      end
+      greps
+    end
+
     # Pretty object inspection
     def inspect
       %Q{#<Grit::Repo "#{@path}">}

test/test_repo.rb

@@ -416,4 +416,12 @@ def test_select_existing_objects
     after = ['634396b2f541a9f2d58b00be1a07f0c358b999b3']
     assert_equal after, @r.git.select_existing_objects(before)
   end
+
+  def test_grep
+    res = @r.grep('def test_select_existing_objects', 1, 'master')
+    assert_equal 1, res.length
+    assert_equal 413, res.first.startline
+    assert_equal 'test/test_repo.rb', res.first.filename
+    assert_equal '  def test_select_existing_objects', res.first.content[1]
+  end
 end