From f202d1d449f7ff736202d3041c78f38bb2bc3a3f Mon Sep 17 00:00:00 2001
From: Alexander Machehin <alexander.machehin@gmail.com>
Date: Mon, 6 Apr 2015 22:44:37 +0500
Subject: [PATCH] new diff; in progress

---
 Gemfile                                       |   2 +-
 Gemfile.lock                                  |   4 +-
 app/helpers/commit_helper.rb                  |  70 +++++++++---
 app/helpers/diff_helper.rb                    |   2 +-
 .../projects/git/commits/_diff.html.slim      |  10 +-
 .../projects/git/commits/_show.html.slim      |   7 +-
 app/views/projects/git/commits/diff.html.slim |   5 +-
 .../pull_requests/_diff_tab.html.slim         |   5 +-
 lib/ext/core/string.rb                        |   4 +-
 lib/ext/git/grit.rb                           |   1 -
 lib/ext/posix_spawn.rb                        | 101 ++++++++++++++++++
 11 files changed, 182 insertions(+), 29 deletions(-)
 create mode 100644 lib/ext/posix_spawn.rb

diff --git a/Gemfile b/Gemfile
index 6a2e3a54f..5b3de9bfa 100644
--- a/Gemfile
+++ b/Gemfile
@@ -30,7 +30,7 @@ gem 'state_machines-activerecord'
 gem 'redis-rails'
 
 gem 'grack', git: 'git://github.com/rosa-abf/grack.git', require: 'git_http'
-gem 'grit', git: 'git://github.com/rosa-abf/grit.git', tag: '2.6.16'
+gem 'grit', git: 'git://github.com/rosa-abf/grit.git', tag: '2.6.17'
 gem 'charlock_holmes'
 gem 'github-linguist', '3.1.5', require: 'linguist'
 gem 'diff-display'
diff --git a/Gemfile.lock b/Gemfile.lock
index f62782e8b..ea370ee06 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -41,8 +41,8 @@ GIT
 
 GIT
   remote: git://github.com/rosa-abf/grit.git
-  revision: a9548c92188cc307e7af1dd41a733e7000a783a9
-  tag: 2.6.16
+  revision: b733f0ceefb44b18a9dec8f509ba5493dab59e4e
+  tag: 2.6.17
   specs:
     grit (2.5.0)
       diff-lcs (~> 1.1)
diff --git a/app/helpers/commit_helper.rb b/app/helpers/commit_helper.rb
index f3282580b..2935e2f0d 100644
--- a/app/helpers/commit_helper.rb
+++ b/app/helpers/commit_helper.rb
@@ -1,23 +1,35 @@
 module CommitHelper
   MAX_FILES_WITHOUT_COLLAPSE = 25
 
-  def render_commit_stats(stats)
-    res = ["<table class='table table-responsive boffset0'>"]
+  def render_commit_stats(stats, diff)
+    res = ["<ul class='list-group boffset0'>"]
     ind=0
     stats.files.each do |filename, adds, deletes, total|
-      res << "<tr>"
-      res << "<td><a href='#diff-#{ind}'>#{h(filename.rtruncate 120)}</a></td>"
-      res << "<td class='diffstat'>"
-      res << I18n.t("layout.projects.inline_changes_count", count: total).strip +
-             " (" +
-             I18n.t("layout.projects.inline_additions_count", count: adds).strip +
-             ", " +
-             I18n.t("layout.projects.inline_deletions_count", count: deletes).strip +
-             ")"
-      res << "</td>"
+      file_name = if diff[ind].renamed_file
+          "#{diff[ind].a_path.rtruncate 60}=>#{diff[ind].b_path.rtruncate 60}"
+        else
+          filename.rtruncate(120)
+        end
+
+      res << "<li class='list-group-item'>"
+        res << "<div class='row'>"
+          res << "<div class='col-sm-8'><a href='#diff-#{ind}'>#{diff_file_icon(diff[ind])} #{h(file_name)}</a></div>"
+
+          res << "<div class='col-sm-2'>"
+            res << "<div class='pull-right'>"
+              res << "<strong class='text-success'>+#{adds}</strong> <strong class='text-danger'>-#{deletes}</strong>"
+            res << "</div>"
+          res << "</div>"
+
+          res << "<div class='col-sm-2'>"
+            res << render_progress_bar(adds, deletes)
+          res << "</div>"
+
+        res << "</div"
+      res << "</li>"
       ind +=1
     end
-    res << "</table>"
+    res << "</ul>"
 
     wrap_commit_header_list(stats, res)
   end
@@ -73,9 +85,41 @@ module CommitHelper
     Russian.p(commits_count, *commits_pluralization_arr)
   end
 
+  def is_file_open_in_diff(blob, diff)
+    return true if blob.binary? && blob.render_as == :image
+    return true if diff.diff.blank? && diff.a_mode != diff.b_mode
+    diff.diff.present? && diff.diff.split("\n").count <= DiffHelper::MAX_LINES_WITHOUT_COLLAPSE
+  end
+
   protected
 
   def commits_pluralization_arr
     pluralize ||=  t('layout.commits.pluralize').map {|base, title| title.to_s}
   end
+
+  def render_progress_bar(adds, deletes)
+    return if adds+deletes == 0
+    res = ''
+    pluses  = ((adds/(adds+deletes).to_f)*100).round
+    minuses = 100 - pluses
+
+    res << "<div class='progress' style='margin-bottom: 0'>"
+      res << "<div class='progress-bar progress-bar-success' style='width: #{pluses}%'></div>"
+      res << "<div class='progress-bar progress-bar-danger' style='width: #{minuses}%'></div>"
+    res << "</div>"
+    res
+  end
+
+  def diff_file_icon(diff)
+    icon = if diff.renamed_file
+             'fa-caret-square-o-right text-info'
+           elsif diff.new_file
+             'fa-plus-square text-success'
+           elsif diff.deleted_file
+             'fa-minus-square text-danger'
+           else
+             'fa-pencil-square text-warning'
+           end
+    "<i class='fa #{icon}'></i>"
+  end
 end
diff --git a/app/helpers/diff_helper.rb b/app/helpers/diff_helper.rb
index afa4b193a..f9877b22f 100644
--- a/app/helpers/diff_helper.rb
+++ b/app/helpers/diff_helper.rb
@@ -2,7 +2,7 @@ module DiffHelper
   MAX_FILES_WITHOUT_COLLAPSE = 25
   MAX_LINES_WITHOUT_COLLAPSE = 50
 
-  def render_diff_stats(stats)
+  def render_diff_stats(stats, diff)
     res = ["<table class='table table-responsive boffset0'>"]
     stats.each_with_index do |stat, ind|
       res << "<tr>"
diff --git a/app/views/projects/git/commits/_diff.html.slim b/app/views/projects/git/commits/_diff.html.slim
index 2d3189d13..395fb34f7 100644
--- a/app/views/projects/git/commits/_diff.html.slim
+++ b/app/views/projects/git/commits/_diff.html.slim
@@ -1,9 +1,11 @@
 - commit_id = diff.deleted_file ? parent_commit.try(:id) : @commit.id
 - diff_counter_content = "diff-#{diff_counter}_content"
-
-- if diff.diff.present?
+- if diff.renamed_file
+  - blob = @project.repo.tree(commit_id) / diff.b_path
+- else
   - blob = @project.repo.tree(commit_id) / diff.a_path
-  - is_file_open = 'in' if !blob.binary? && diff.diff.split("\n").count <= DiffHelper::MAX_LINES_WITHOUT_COLLAPSE
+
+- is_file_open = 'in' if is_file_open_in_diff(blob, diff)
 
 .file.offset10
   a name = "diff-#{diff_counter}"
@@ -34,3 +36,5 @@
         - if (@project.repo.tree(commit_id) / diff.b_path).nil?
           = "a_path=#{diff.a_path}; b_path=#{diff.b_path}"
         == render_diff(diff, diff_counter: diff_counter, comments: @comments)
+  - if diff.a_mode != diff.b_mode && diff.diff.blank?
+    == render 'file_change_mode', blob: blob, diff: diff, diff_counter_content: diff_counter_content
diff --git a/app/views/projects/git/commits/_show.html.slim b/app/views/projects/git/commits/_show.html.slim
index bc9187fba..ecec19721 100644
--- a/app/views/projects/git/commits/_show.html.slim
+++ b/app/views/projects/git/commits/_show.html.slim
@@ -1,6 +1,7 @@
 - begin
-  - stats = @commit.stats
-  = render_commit_stats(stats)
+  - diffs = @commit.show
+  - stats = Grit::CommitStats.find_all(@project.repo, @commit.sha, max_count: 1, skip: 0, M: true)[0][-1]
+  = render_commit_stats(stats, diffs)
 
   .pull-right
     => link_to 'raw diff', commit_path(@project, @commit.id, :diff)
@@ -8,6 +9,6 @@
     =< link_to 'patch', commit_path(@project, @commit.id, :patch)
   .clearfix
 
-  == render partial: 'diff', collection: @commit.diffs, locals: { parent_commit: @commit.parents.try(:first) }
+  == render partial: 'diff', collection: diffs, locals: { parent_commit: @commit.parents.try(:first) }
 - rescue Grit::Git::GitTimeout
   h3.text-danger= t('layout.git.repositories.commit_diff_too_big')
diff --git a/app/views/projects/git/commits/diff.html.slim b/app/views/projects/git/commits/diff.html.slim
index 7a04db0b4..d11e63f4e 100644
--- a/app/views/projects/git/commits/diff.html.slim
+++ b/app/views/projects/git/commits/diff.html.slim
@@ -21,8 +21,9 @@
         deletions: t("layout.projects.commit_deletions_count", count: total_deletions))
 
     -begin
-      == render_diff_stats @stats
-      - diffs = Grit::Commit.diff(@project.repo, @common_ancestor.id, @commit.id)
+      - diffs = @project.repo.diff @common_ancestor.id, @commit.id
+      == render_diff_stats @stats, diffs
+      -# diffs = Grit::Commit.diff(@project.repo, @common_ancestor.id, @commit.id)
       == render partial: 'projects/git/commits/diff', collection: diffs, locals: { parent_commit: @common_ancestor }
 
     - rescue Grit::Git::GitTimeout
diff --git a/app/views/projects/pull_requests/_diff_tab.html.slim b/app/views/projects/pull_requests/_diff_tab.html.slim
index 095c93fe9..fc9c3df14 100644
--- a/app/views/projects/pull_requests/_diff_tab.html.slim
+++ b/app/views/projects/pull_requests/_diff_tab.html.slim
@@ -1,6 +1,7 @@
 -begin
-  == render_diff_stats(@stats)
-  == render partial: 'pull_diff', collection: @pull.diff
+  - diff = @pull.diff
+  == render_diff_stats(@stats, diff)
+  == render partial: 'pull_diff', collection: diff
 - rescue => ex
   -if ex.try(:message) == 'Grit::Git::GitTimeout'
     p= t 'layout.git.repositories.commit_diff_too_big'
diff --git a/lib/ext/core/string.rb b/lib/ext/core/string.rb
index b22e3dee6..b8837a085 100644
--- a/lib/ext/core/string.rb
+++ b/lib/ext/core/string.rb
@@ -7,7 +7,9 @@ class String
       force_encoding(default_encoding)
     else # should encode
       options = {invalid: :replace, undef: :replace, replace: ''}
-      if (detected = detect_encoding) && detected[:encoding]
+      if encoding.name == 'UTF-8'
+        encode!(default_encoding, 'UTF-8', options)
+      elsif (detected = detect_encoding) && detected[:encoding]
         force_encoding(detected[:encoding]).encode!(default_encoding, detected[:encoding], options)
       end
       scrub('')
diff --git a/lib/ext/git/grit.rb b/lib/ext/git/grit.rb
index 62ca5dc6a..0b1a70980 100644
--- a/lib/ext/git/grit.rb
+++ b/lib/ext/git/grit.rb
@@ -64,7 +64,6 @@ module Grit
 
     def diff(a, b, *paths)
       diff = self.git.native('diff', {M: true}, "#{a}...#{b}", '--', *paths)
-
       if diff =~ /diff --git a/
         diff = diff.sub(/.*?(diff --git a)/m, '\1')
       else
diff --git a/lib/ext/posix_spawn.rb b/lib/ext/posix_spawn.rb
new file mode 100644
index 000000000..bd708da07
--- /dev/null
+++ b/lib/ext/posix_spawn.rb
@@ -0,0 +1,101 @@
+require 'posix/spawn'
+
+module POSIX
+  module Spawn
+    class Child
+      include POSIX::Spawn
+    private
+      # Start a select loop writing any input on the child's stdin and reading
+      # any output from the child's stdout or stderr.
+      #
+      # input   - String input to write on stdin. May be nil.
+      # stdin   - The write side IO object for the child's stdin stream.
+      # stdout  - The read side IO object for the child's stdout stream.
+      # stderr  - The read side IO object for the child's stderr stream.
+      # timeout - An optional Numeric specifying the total number of seconds
+      #           the read/write operations should occur for.
+      #
+      # Returns an [out, err] tuple where both elements are strings with all
+      #   data written to the stdout and stderr streams, respectively.
+      # Raises TimeoutExceeded when all data has not been read / written within
+      #   the duration specified in the timeout argument.
+      # Raises MaximumOutputExceeded when the total number of bytes output
+      #   exceeds the amount specified by the max argument.
+      def read_and_write(input, stdin, stdout, stderr, timeout=nil, max=nil)
+        max = nil if max && max <= 0
+        @out, @err = '', ''
+        offset = 0
+
+        # force all string and IO encodings to BINARY under 1.9 for now
+        #if @out.respond_to?(:force_encoding) and stdin.respond_to?(:set_encoding)
+        #  [stdin, stdout, stderr].each do |fd|
+        #    fd.set_encoding('BINARY', 'BINARY')
+        #  end
+        #  @out.force_encoding('BINARY')
+        #  @err.force_encoding('BINARY')
+        #  input = input.dup.force_encoding('BINARY') if input
+        #end
+
+        timeout = nil if timeout && timeout <= 0.0
+        @runtime = 0.0
+        start = Time.now
+
+        readers = [stdout, stderr]
+        writers =
+          if input
+            [stdin]
+          else
+            stdin.close
+            []
+          end
+        slice_method = input.respond_to?(:byteslice) ? :byteslice : :slice
+        t = timeout
+
+        while readers.any? || writers.any?
+          ready = IO.select(readers, writers, readers + writers, t)
+          raise TimeoutExceeded if ready.nil?
+
+          # write to stdin stream
+          ready[1].each do |fd|
+            begin
+              boom = nil
+              size = fd.write_nonblock(input)
+              input = input.send(slice_method, size..-1)
+            rescue Errno::EPIPE => boom
+            rescue Errno::EAGAIN, Errno::EINTR
+            end
+            if boom || input.bytesize == 0
+              stdin.close
+              writers.delete(stdin)
+            end
+          end
+
+          # read from stdout and stderr streams
+          ready[0].each do |fd|
+            buf = (fd == stdout) ? @out : @err
+            begin
+              buf << fd.readpartial(BUFSIZE)
+            rescue Errno::EAGAIN, Errno::EINTR
+            rescue EOFError
+              readers.delete(fd)
+              fd.close
+            end
+          end
+
+          # keep tabs on the total amount of time we've spent here
+          @runtime = Time.now - start
+          if timeout
+            t = timeout - @runtime
+            raise TimeoutExceeded if t < 0.0
+          end
+
+          # maybe we've hit our max output
+          if max && ready[0].any? && (@out.size + @err.size) > max
+            raise MaximumOutputExceeded
+          end
+        end
+        [@out.mb_chars.default_encoding!, @err.mb_chars.default_encoding!]
+      end
+    end
+  end
+end