From 6c4650b1dac5fc308070c5ffc2ed6e7e42d92e9c Mon Sep 17 00:00:00 2001
From: Pankaj Tyagi <ptyagi@sycamoreinformatics.com>
Date: Tue, 1 Oct 2019 11:28:16 -0400
Subject: [PATCH] Add option `:ignore_crlf` to fix #105

---
 lib/diffy/html_formatter.rb | 12 ++++++++----
 spec/diffy_spec.rb          |  7 +++++++
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/lib/diffy/html_formatter.rb b/lib/diffy/html_formatter.rb
index a72ee64..9f50668 100644
--- a/lib/diffy/html_formatter.rb
+++ b/lib/diffy/html_formatter.rb
@@ -90,10 +90,14 @@ def highlighted_words
 
     def split_characters(chunk)
       chunk.gsub(/^./, '').each_line.map do |line|
-        chars = line.sub(/([\r\n]$)/, '').split('')
-        # add escaped newlines
-        chars << '\n'
-        chars.map{|chr| ERB::Util.h(chr) }
+        if @options[:ignore_crlf]
+          (line.chomp.split('') + ['\n']).map{|chr| ERB::Util.h(chr) }
+        else
+          chars = line.sub(/([\r\n]$)/, '').split('')
+          # add escaped newlines
+          chars << '\n'
+          chars.map{|chr| ERB::Util.h(chr) }
+        end
       end.flatten.join("\n") + "\n"
     end
 
diff --git a/spec/diffy_spec.rb b/spec/diffy_spec.rb
index c84f8ab..551c6c7 100644
--- a/spec/diffy_spec.rb
+++ b/spec/diffy_spec.rb
@@ -503,6 +503,13 @@ def tempfile(string, fn = 'diffy-spec')
         expect(@diff.to_s(:html)).to eq(html)
       end
 
+      it "should treat unix vs windows newlines as same if option :ignore_crlf" do
+        @diff = Diffy::Diff.new("one\ntwo\nthree\n", "one\r\ntwo\r\nthree\r\n",
+                               ignore_crlf: true)
+        empty_diff = "<div class=\"diff\"></div>"
+        expect(@diff.to_s(:html)).to eq(empty_diff)
+      end
+
       describe 'with lines that include \n' do
         before do
           string1 = 'a\nb'"\n"