Revert "Merge branch 'revert-satellites' into 'master' "

This reverts commit 5daf44b7c86e0e2641a902b1da8b01d91fa3dbfa, reversing
changes made to 2f706fbd231cabe7a76a5d17ac44285aaaf8592c.

57 files changed, 707 insertions, 576 deletions

diff --git a/app/assets/javascripts/merge_request_widget.js.coffee b/app/assets/javascripts/merge_request_widget.js.coffee
index 762eec63dee..995a2f24093 100644
--- a/app/assets/javascripts/merge_request_widget.js.coffee
+++ b/app/assets/javascripts/merge_request_widget.js.coffee
@@ -19,7 +19,7 @@ class @MergeRequestWidget
           when 'merged'
             location.reload()
           else
-            setTimeout(merge_request_widget.mergeInProgress, 3000)
+            setTimeout(merge_request_widget.mergeInProgress, 2000)
       dataType: 'json'
 
   getMergeStatus: ->
@@ -49,10 +49,8 @@ class @MergeRequestWidget
       @setMergeButtonClass('btn-danger')
 
   showCiCoverage: (coverage) ->
-    cov_html = $('<span>')
-    cov_html.addClass('ci-coverage')
-    cov_html.text('Coverage ' + coverage + '%')
-    $('.ci_widget:visible').append(cov_html)
+    text = 'Coverage ' + coverage + '%'
+    $('.ci_widget:visible .ci-coverage').text(text)
 
   setMergeButtonClass: (css_class) ->
     $('.accept_merge_request').removeClass("btn-create").addClass(css_class)
diff --git a/app/assets/stylesheets/pages/merge_requests.scss b/app/assets/stylesheets/pages/merge_requests.scss
index baba6f32129..30bbec7b795 100644
--- a/app/assets/stylesheets/pages/merge_requests.scss
+++ b/app/assets/stylesheets/pages/merge_requests.scss
@@ -1,9 +1,15 @@
-
-  /**
-   * MR -> show: Automerge widget
+/**
+ * MR -> show: Automerge widget
  *
  */
 .mr-state-widget {
+  background: #FAFAFA;
+  margin-bottom: 20px;
+  color: #666;
+  border: 1px solid #e5e5e5;
+  @include box-shadow(0 1px 1px rgba(0, 0, 0, 0.05));
+  @include border-radius(3px);
+
   form {
     margin-bottom: 0;
     .clearfix {
@@ -20,16 +26,67 @@
       display: inline-block;
       margin: 0;
       margin-left: 20px;
-      padding: 10px 0;
+      padding: 5px;
       line-height: 20px;
-      font-weight: bold;
 
       .remove_source_checkbox {
         margin: 0;
-        font-weight: bold;
       }
     }
   }
+
+  .ci_widget {
+    border-bottom: 1px solid #EEE;
+
+    i {
+      margin-right: 4px;
+    }
+
+    &.ci-success {
+      color: $gl-success;
+    }
+
+    &.ci-skipped {
+      background-color: #eee;
+      color: #888;
+    }
+
+    &.ci-pending,
+    &.ci-running {
+      color: $gl-warning;
+    }
+
+    &.ci-failed,
+    &.ci-canceled,
+    &.ci-error {
+      color: $gl-danger;
+    }
+  }
+
+  .mr-widget-body,
+  .ci_widget,
+  .mr-widget-footer {
+    padding: 15px;
+  }
+
+  .mr-widget-body {
+    h4 {
+      font-weight: bold;
+      margin: 5px 0;
+    }
+
+    p:last-child {
+      margin-bottom: 0;
+    }
+  }
+
+  .mr-widget-footer {
+    border-top: 1px solid #EEE;
+  }
+
+  .ci-coverage {
+    float: right;
+  }
 }
 
 @media(min-width: $screen-sm-max) {
@@ -61,23 +118,10 @@
 }
 
 .label-branch {
-  @include border-radius(4px);
-  padding: 3px 4px;
-  border: none;
-  background: $hover;
-  color: #333;
+  color: #222;
   font-family: $monospace_font;
-  font-weight: normal;
+  font-weight: bold;
   overflow: hidden;
-
-  .label-project {
-    @include border-radius-left(4px);
-    padding: 3px 4px;
-    background: #279;
-    position: relative;
-    left: -4px;
-    letter-spacing: -1px;
-  }
 }
 
 .mr-list {
@@ -124,64 +168,6 @@
   display: none;
 }
 
-.mr-state-widget {
-  font-size: 13px;
-  background: #FAFAFA;
-  margin-bottom: 20px;
-  color: #666;
-  border: 1px solid #e5e5e5;
-  @include box-shadow(0 1px 1px rgba(0, 0, 0, 0.05));
-  @include border-radius(3px);
-
-  .ci_widget {
-    padding: 10px 15px;
-    font-size: 15px;
-    border-bottom: 1px solid #EEE;
-
-    &.ci-success {
-      color: $gl-success;
-    }
-
-    &.ci-skipped {
-      background-color: #eee;
-      color: #888;
-    }
-
-    &.ci-pending,
-    &.ci-running {
-      color: $gl-warning;
-    }
-
-    &.ci-failed,
-    &.ci-canceled,
-    &.ci-error {
-      color: $gl-danger;
-    }
-  }
-
-  .mr-widget-body {
-    padding: 10px 15px;
-
-    h4 {
-      font-weight: bold;
-      margin: 5px 0;
-    }
-
-    p:last-child {
-      margin-bottom: 0;
-    }
-  }
-
-  .mr-widget-footer {
-    padding: 10px 15px;
-    border-top: 1px solid #EEE;
-  }
-
-  .ci-coverage {
-    float: right;
-  }
-}
-
 .merge-request-show-labels {
   a {
     margin-right: 5px;
@@ -196,3 +182,7 @@
 .merge-request-form .select2-container {
   width: 250px !important;
 }
+
+#modal_merge_info .modal-dialog {
+  width: 600px;
+}
diff --git a/app/controllers/projects/blob_controller.rb b/app/controllers/projects/blob_controller.rb
index b762518d377..100d3d3b317 100644
--- a/app/controllers/projects/blob_controller.rb
+++ b/app/controllers/projects/blob_controller.rb
@@ -13,27 +13,20 @@ class Projects::BlobController < Projects::ApplicationController
   before_action :commit, except: [:new, :create]
   before_action :blob, except: [:new, :create]
   before_action :from_merge_request, only: [:edit, :update]
-  before_action :after_edit_path, only: [:edit, :update]
   before_action :require_branch_head, only: [:edit, :update]
+  before_action :editor_variables, except: [:show, :preview, :diff]
+  before_action :after_edit_path, only: [:edit, :update]
 
   def new
     commit unless @repository.empty?
   end
 
   def create
-    file_path = File.join(@path, File.basename(params[:file_name]))
-    result = Files::CreateService.new(
-      @project,
-      current_user,
-      params.merge(new_branch: sanitized_new_branch_name),
-      @ref,
-      file_path
-    ).execute
+    result = Files::CreateService.new(@project, current_user, @commit_params).execute
 
     if result[:status] == :success
       flash[:notice] = "Your changes have been successfully committed"
-      ref = sanitized_new_branch_name.presence || @ref
-      redirect_to namespace_project_blob_path(@project.namespace, @project, File.join(ref, file_path))
+      redirect_to namespace_project_blob_path(@project.namespace, @project, File.join(@target_branch, @file_path))
     else
       flash[:alert] = result[:message]
       render :new
@@ -48,22 +41,10 @@ class Projects::BlobController < Projects::ApplicationController
   end
 
   def update
-    result = Files::UpdateService.
-      new(
-        @project,
-        current_user,
-        params.merge(new_branch: sanitized_new_branch_name),
-        @ref,
-        @path
-      ).execute
+    result = Files::UpdateService.new(@project, current_user, @commit_params).execute
 
     if result[:status] == :success
       flash[:notice] = "Your changes have been successfully committed"
-
-      if from_merge_request
-        from_merge_request.reload_code
-      end
-
       redirect_to after_edit_path
     else
       flash[:alert] = result[:message]
@@ -80,12 +61,11 @@ class Projects::BlobController < Projects::ApplicationController
   end
 
   def destroy
-    result = Files::DeleteService.new(@project, current_user, params, @ref, @path).execute
+    result = Files::DeleteService.new(@project, current_user, @commit_params).execute
 
     if result[:status] == :success
       flash[:notice] = "Your changes have been successfully committed"
-      redirect_to namespace_project_tree_path(@project.namespace, @project,
-                                              @ref)
+      redirect_to namespace_project_tree_path(@project.namespace, @project, @target_branch)
     else
       flash[:alert] = result[:message]
       render :show
@@ -135,7 +115,6 @@ class Projects::BlobController < Projects::ApplicationController
     @id = params[:id]
     @ref, @path = extract_ref(@id)
 
-
   rescue InvalidPathError
     not_found!
   end
@@ -145,8 +124,8 @@ class Projects::BlobController < Projects::ApplicationController
       if from_merge_request
         diffs_namespace_project_merge_request_path(from_merge_request.target_project.namespace, from_merge_request.target_project, from_merge_request) +
           "#file-path-#{hexdigest(@path)}"
-      elsif sanitized_new_branch_name.present?
-        namespace_project_blob_path(@project.namespace, @project, File.join(sanitized_new_branch_name, @path))
+      elsif @target_branch.present?
+        namespace_project_blob_path(@project.namespace, @project, File.join(@target_branch, @path))
       else
         namespace_project_blob_path(@project.namespace, @project, @id)
       end
@@ -160,4 +139,25 @@ class Projects::BlobController < Projects::ApplicationController
   def sanitized_new_branch_name
     @new_branch ||= sanitize(strip_tags(params[:new_branch]))
   end
+
+  def editor_variables
+    @current_branch = @ref
+    @target_branch = (sanitized_new_branch_name || @ref)
+
+    @file_path =
+      if action_name.to_s == 'create'
+        File.join(@path, File.basename(params[:file_name]))
+      else
+        @path
+      end
+
+    @commit_params = {
+      file_path: @file_path,
+      current_branch: @current_branch,
+      target_branch: @target_branch,
+      commit_message: params[:commit_message],
+      file_content: params[:content],
+      file_content_encoding: params[:encoding]
+    }
+  end
 end
diff --git a/app/controllers/projects/compare_controller.rb b/app/controllers/projects/compare_controller.rb
index c5f085c236f..d9b3adae95b 100644
--- a/app/controllers/projects/compare_controller.rb
+++ b/app/controllers/projects/compare_controller.rb
@@ -13,13 +13,8 @@ class Projects::CompareController < Projects::ApplicationController
     base_ref = Addressable::URI.unescape(params[:from])
     @ref = head_ref = Addressable::URI.unescape(params[:to])
 
-    compare_result = CompareService.new.execute(
-      current_user,
-      @project,
-      head_ref,
-      @project,
-      base_ref
-    )
+    compare_result = CompareService.new.
+      execute(@project, head_ref, @project, base_ref)
 
     @commits = compare_result.commits
     @diffs = compare_result.diffs
diff --git a/app/controllers/projects/merge_requests_controller.rb b/app/controllers/projects/merge_requests_controller.rb
index d1265198318..f3054881daf 100644
--- a/app/controllers/projects/merge_requests_controller.rb
+++ b/app/controllers/projects/merge_requests_controller.rb
@@ -1,9 +1,7 @@
-require 'gitlab/satellite/satellite'
-
 class Projects::MergeRequestsController < Projects::ApplicationController
   before_action :module_enabled
   before_action :merge_request, only: [
-    :edit, :update, :show, :diffs, :commits, :automerge, :automerge_check,
+    :edit, :update, :show, :diffs, :commits, :merge, :merge_check,
     :ci_status, :toggle_subscription
   ]
   before_action :closes_issues, only: [:edit, :update, :show, :diffs, :commits]
@@ -137,7 +135,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     end
   end
 
-  def automerge_check
+  def merge_check
     if @merge_request.unchecked?
       @merge_request.check_if_can_be_merged
     end
@@ -147,11 +145,11 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     render partial: "projects/merge_requests/widget/show.html.haml", layout: false
   end
 
-  def automerge
+  def merge
     return access_denied! unless @merge_request.can_be_merged_by?(current_user)
 
-    if @merge_request.automergeable?
-      AutoMergeWorker.perform_async(@merge_request.id, current_user.id, params)
+    if @merge_request.mergeable?
+      MergeWorker.perform_async(@merge_request.id, current_user.id, params)
       @status = true
     else
       @status = false
diff --git a/app/helpers/merge_requests_helper.rb b/app/helpers/merge_requests_helper.rb
index 45ee4fe4135..f8169b4f288 100644
--- a/app/helpers/merge_requests_helper.rb
+++ b/app/helpers/merge_requests_helper.rb
@@ -61,4 +61,14 @@ module MergeRequestsHelper
       }
     )
   end
+
+  def source_branch_with_namespace(merge_request)
+    if merge_request.for_fork?
+      namespace = link_to(merge_request.source_project_namespace,
+        project_path(merge_request.source_project))
+      namespace + ":#{merge_request.source_branch}"
+    else
+      merge_request.source_branch
+    end
+  end
 end
diff --git a/app/models/merge_request.rb b/app/models/merge_request.rb
index 324d1795ab4..467b90861f9 100644
--- a/app/models/merge_request.rb
+++ b/app/models/merge_request.rb
@@ -41,8 +41,6 @@ class MergeRequest < ActiveRecord::Base
 
   delegate :commits, :diffs, :last_commit, :last_commit_short_sha, to: :merge_request_diff, prefix: nil
 
-  attr_accessor :should_remove_source_branch
-
   # When this attribute is true some MR validation is ignored
   # It allows us to close or modify broken merge requests
   attr_accessor :allow_broken
@@ -57,7 +55,7 @@ class MergeRequest < ActiveRecord::Base
       transition [:reopened, :opened] => :closed
     end
 
-    event :merge do
+    event :mark_as_merged do
       transition [:reopened, :opened, :locked] => :merged
     end
 
@@ -205,7 +203,10 @@ class MergeRequest < ActiveRecord::Base
   end
 
   def check_if_can_be_merged
-    if Gitlab::Satellite::MergeAction.new(self.author, self).can_be_merged?
+    can_be_merged =
+      project.repository.can_be_merged?(source_sha, target_branch)
+
+    if can_be_merged
       mark_as_mergeable
     else
       mark_as_unmergeable
@@ -220,18 +221,6 @@ class MergeRequest < ActiveRecord::Base
     self.target_project.events.where(target_id: self.id, target_type: "MergeRequest", action: Event::CLOSED).last
   end
 
-  def automerge!(current_user, commit_message = nil)
-    return unless automergeable?
-
-    MergeRequests::AutoMergeService.
-      new(target_project, current_user).
-      execute(self, commit_message)
-  end
-
-  def remove_source_branch?
-    self.should_remove_source_branch && !self.source_project.root_ref?(self.source_branch) && !self.for_fork?
-  end
-
   def open?
     opened? || reopened?
   end
@@ -240,11 +229,11 @@ class MergeRequest < ActiveRecord::Base
     title =~ /\A\[?WIP\]?:? /i
   end
 
-  def automergeable?
+  def mergeable?
     open? && !work_in_progress? && can_be_merged?
   end
 
-  def automerge_status
+  def gitlab_merge_status
     if work_in_progress?
       "work_in_progress"
     else
@@ -271,14 +260,14 @@ class MergeRequest < ActiveRecord::Base
   #
   # see "git diff"
   def to_diff(current_user)
-    Gitlab::Satellite::MergeAction.new(current_user, self).diff_in_satellite
+    target_project.repository.diff_text(target_branch, source_sha)
   end
 
   # Returns the commit as a series of email patches.
   #
   # see "git format-patch"
   def to_patch(current_user)
-    Gitlab::Satellite::MergeAction.new(current_user, self).format_patch
+    target_project.repository.format_patch(target_branch, source_sha)
   end
 
   def hook_attrs
@@ -429,4 +418,30 @@ class MergeRequest < ActiveRecord::Base
       "Open"
     end
   end
+
+  def target_sha
+    @target_sha ||= target_project.
+      repository.commit(target_branch).sha
+  end
+
+  def source_sha
+    commits.first.sha
+  end
+
+  def fetch_ref
+    target_project.repository.fetch_ref(
+      source_project.repository.path_to_repo,
+      "refs/heads/#{source_branch}",
+      "refs/merge-requests/#{iid}/head"
+    )
+  end
+
+  def in_locked_state
+    begin
+      lock_mr
+      yield
+    ensure
+      unlock_mr if locked?
+    end
+  end
 end
diff --git a/app/models/merge_request_diff.rb b/app/models/merge_request_diff.rb
index df1c2b78758..e317c8eac4d 100644
--- a/app/models/merge_request_diff.rb
+++ b/app/models/merge_request_diff.rb
@@ -16,9 +16,8 @@ require Rails.root.join("app/models/commit")
 class MergeRequestDiff < ActiveRecord::Base
   include Sortable
 
-  # Prevent store of diff
-  # if commits amount more then 200
-  COMMITS_SAFE_SIZE = 200
+  # Prevent store of diff if commits amount more then 500
+  COMMITS_SAFE_SIZE = 500
 
   attr_reader :commits, :diffs
 
@@ -124,12 +123,12 @@ class MergeRequestDiff < ActiveRecord::Base
     if new_diffs.any?
       if new_diffs.size > Commit::DIFF_HARD_LIMIT_FILES
         self.state = :overflow_diff_files_limit
-        new_diffs = []
+        new_diffs = new_diffs.first[Commit::DIFF_HARD_LIMIT_LINES]
       end
 
       if new_diffs.sum { |diff| diff.diff.lines.count } > Commit::DIFF_HARD_LIMIT_LINES
         self.state = :overflow_diff_lines_limit
-        new_diffs = []
+        new_diffs = new_diffs.first[Commit::DIFF_HARD_LIMIT_LINES]
       end
     end
 
@@ -160,12 +159,21 @@ class MergeRequestDiff < ActiveRecord::Base
   private
 
   def compare_result
-    @compare_result ||= CompareService.new.execute(
-      merge_request.author,
-      merge_request.source_project,
-      merge_request.source_branch,
-      merge_request.target_project,
-      merge_request.target_branch,
-    )
+    @compare_result ||=
+      begin
+        # Update ref for merge request
+        merge_request.fetch_ref
+
+        # Get latest sha of branch from source project
+        source_sha = merge_request.source_project.commit(source_branch).sha
+
+        Gitlab::CompareResult.new(
+          Gitlab::Git::Compare.new(
+            merge_request.target_project.repository.raw_repository,
+            merge_request.target_branch,
+            source_sha,
+          )
+        )
+      end
   end
 end
diff --git a/app/models/namespace.rb b/app/models/namespace.rb
index 30ffacadded..161a16ca61c 100644
--- a/app/models/namespace.rb
+++ b/app/models/namespace.rb
@@ -118,12 +118,11 @@ class Namespace < ActiveRecord::Base
     gitlab_shell.add_namespace(path_was)
 
     if gitlab_shell.mv_namespace(path_was, path)
-      # If repositories moved successfully we need to remove old satellites
-      # and send update instructions to users.
+      # If repositories moved successfully we need to
+      # send update instructions to users.
       # However we cannot allow rollback since we moved namespace dir
       # So we basically we mute exceptions in next actions
       begin
-        gitlab_shell.rm_satellites(path_was)
         send_update_instructions
       rescue
         # Returning false does not rollback after_* transaction but gives
diff --git a/app/models/project.rb b/app/models/project.rb
index 3dc1729e812..4628f478ca6 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -520,14 +520,6 @@ class Project < ActiveRecord::Base
     !repository.exists? || repository.empty?
   end
 
-  def ensure_satellite_exists
-    self.satellite.create unless self.satellite.exists?
-  end
-
-  def satellite
-    @satellite ||= Gitlab::Satellite::Satellite.new(self)
-  end
-
   def repo
     repository.raw
   end
@@ -597,14 +589,11 @@ class Project < ActiveRecord::Base
     new_path_with_namespace = File.join(namespace_dir, path)
 
     if gitlab_shell.mv_repository(old_path_with_namespace, new_path_with_namespace)
-      # If repository moved successfully we need to remove old satellite
-      # and send update instructions to users.
+      # If repository moved successfully we need to send update instructions to users.
       # However we cannot allow rollback since we moved repository
       # So we basically we mute exceptions in next actions
       begin
         gitlab_shell.mv_repository("#{old_path_with_namespace}.wiki", "#{new_path_with_namespace}.wiki")
-        gitlab_shell.rm_satellites(old_path_with_namespace)
-        ensure_satellite_exists
         send_move_instructions
         reset_events_cache
       rescue
@@ -702,7 +691,6 @@ class Project < ActiveRecord::Base
   def create_repository
     if forked?
       if gitlab_shell.fork_repository(forked_from_project.path_with_namespace, self.namespace.path)
-        ensure_satellite_exists
         true
       else
         errors.add(:base, 'Failed to fork repository via gitlab-shell')
diff --git a/app/models/project_services/gitlab_ci_service.rb b/app/models/project_services/gitlab_ci_service.rb
index 5aaa4e85cbc..ecdcd48ae60 100644
--- a/app/models/project_services/gitlab_ci_service.rb
+++ b/app/models/project_services/gitlab_ci_service.rb
@@ -74,6 +74,8 @@ class GitlabCiService < CiService
     else
       :error
     end
+  rescue Errno::ECONNREFUSED
+    :error
   end
 
   def fork_registration(new_project, private_token)
@@ -103,6 +105,8 @@ class GitlabCiService < CiService
     if response.code == 200 and response["coverage"]
       response["coverage"]
     end
+  rescue Errno::ECONNREFUSED
+    nil
   end
 
   def build_page(sha, ref)
diff --git a/app/models/repository.rb b/app/models/repository.rb
index 0a62980f93a..46efbede2a2 100644
--- a/app/models/repository.rb
+++ b/app/models/repository.rb
@@ -364,6 +364,83 @@ class Repository
     @root_ref ||= raw_repository.root_ref
   end
 
+  def commit_file(user, path, content, message, ref)
+    path[0] = '' if path[0] == '/'
+
+    committer = user_to_comitter(user)
+    options = {}
+    options[:committer] = committer
+    options[:author] = committer
+    options[:commit] = {
+      message: message,
+      branch: ref
+    }
+
+    options[:file] = {
+      content: content,
+      path: path
+    }
+
+    Gitlab::Git::Blob.commit(raw_repository, options)
+  end
+
+  def remove_file(user, path, message, ref)
+    path[0] = '' if path[0] == '/'
+
+    committer = user_to_comitter(user)
+    options = {}
+    options[:committer] = committer
+    options[:author] = committer
+    options[:commit] = {
+      message: message,
+      branch: ref
+    }
+
+    options[:file] = {
+      path: path
+    }
+
+    Gitlab::Git::Blob.remove(raw_repository, options)
+  end
+
+  def user_to_comitter(user)
+    {
+      email: user.email,
+      name: user.name,
+      time: Time.now
+    }
+  end
+
+  def can_be_merged?(source_sha, target_branch)
+    our_commit = rugged.branches[target_branch].target
+    their_commit = rugged.lookup(source_sha)
+
+    if our_commit && their_commit
+      !rugged.merge_commits(our_commit, their_commit).conflicts?
+    else
+      false
+    end
+  end
+
+  def merge(source_sha, target_branch, options = {})
+    our_commit = rugged.branches[target_branch].target
+    their_commit = rugged.lookup(source_sha)
+
+    raise "Invalid merge target" if our_commit.nil?
+    raise "Invalid merge source" if their_commit.nil?
+
+    merge_index = rugged.merge_commits(our_commit, their_commit)
+    return false if merge_index.conflicts?
+
+    actual_options = options.merge(
+      parents: [our_commit, their_commit],
+      tree: merge_index.write_tree(rugged),
+      update_ref: "refs/heads/#{target_branch}"
+    )
+
+    Rugged::Commit.create(rugged, actual_options)
+  end
+
   def search_files(query, ref)
     offset = 2
     args = %W(git grep -i -n --before-context #{offset} --after-context #{offset} #{query} #{ref || root_ref})
@@ -397,6 +474,11 @@ class Repository
     )
   end
 
+  def fetch_ref(source_path, source_ref, target_ref)
+    args = %W(git fetch #{source_path} #{source_ref}:#{target_ref})
+    Gitlab::Popen.popen(args, path_to_repo)
+  end
+
   private
 
   def cache
diff --git a/app/services/base_service.rb b/app/services/base_service.rb
index 6d9ed345914..f00ec7408b6 100644
--- a/app/services/base_service.rb
+++ b/app/services/base_service.rb
@@ -31,6 +31,10 @@ class BaseService
     SystemHooksService.new
   end
 
+  def repository
+    project.repository
+  end
+
   # Add an error to the specified model for restricted visibility levels
   def deny_visibility_level(model, denied_visibility_level = nil)
     denied_visibility_level ||= model.visibility_level
diff --git a/app/services/compare_service.rb b/app/services/compare_service.rb
index 6aa9df4b194..70f642baaaa 100644
--- a/app/services/compare_service.rb
+++ b/app/services/compare_service.rb
@@ -1,27 +1,28 @@
+require 'securerandom'
+
 # Compare 2 branches for one repo or between repositories
 # and return Gitlab::CompareResult object that responds to commits and diffs
 class CompareService
-  def execute(current_user, source_project, source_branch, target_project, target_branch)
-    # Try to compare branches to get commits list and diffs
-    #
-    # Note: Use satellite only when need to compare between two repos
-    # because satellites are slower than operations on bare repo
-    if target_project == source_project
-      Gitlab::CompareResult.new(
-        Gitlab::Git::Compare.new(
-          target_project.repository.raw_repository,
-          target_branch,
-          source_branch,
-        )
+  def execute(source_project, source_branch, target_project, target_branch)
+    source_sha = source_project.commit(source_branch).sha
+
+    # If compare with other project we need to fetch ref first
+    unless target_project == source_project
+      random_string = SecureRandom.hex
+
+      target_project.repository.fetch_ref(
+        source_project.repository.path_to_repo,
+        "refs/heads/#{source_branch}",
+        "refs/tmp/#{random_string}/head"
       )
-    else
-      Gitlab::Satellite::CompareAction.new(
-        current_user,
-        target_project,
-        target_branch,
-        source_project,
-        source_branch
-      ).result
     end
+
+    Gitlab::CompareResult.new(
+      Gitlab::Git::Compare.new(
+        target_project.repository.raw_repository,
+        target_branch,
+        source_sha,
+      )
+    )
   end
 end
diff --git a/app/services/files/base_service.rb b/app/services/files/base_service.rb
index bd245100955..d7b40ee8906 100644
--- a/app/services/files/base_service.rb
+++ b/app/services/files/base_service.rb
@@ -1,17 +1,80 @@
 module Files
   class BaseService < ::BaseService
-    attr_reader :ref, :path
+    class ValidationError < StandardError; end
 
-    def initialize(project, user, params, ref, path = nil)
-      @project, @current_user, @params = project, user, params.dup
-      @ref = ref
-      @path = path
+    def execute
+      @current_branch = params[:current_branch]
+      @target_branch  = params[:target_branch]
+      @commit_message = params[:commit_message]
+      @file_path      = params[:file_path]
+      @file_content   = if params[:file_content_encoding] == 'base64'
+                          Base64.decode64(params[:file_content])
+                        else
+                          params[:file_content]
+                        end
+
+      # Validate parameters
+      validate
+
+      # Create new branch if it different from current_branch
+      if @target_branch != @current_branch
+        create_target_branch
+      end
+
+      if sha = commit
+        after_commit(sha, @target_branch)
+        success
+      else
+        error("Something went wrong. Your changes were not committed")
+      end
+    rescue ValidationError => ex
+      error(ex.message)
     end
 
     private
 
-    def repository
-      project.repository
+    def after_commit(sha, branch)
+      PostCommitService.new(project, current_user).execute(sha, branch)
+    end
+
+    def current_branch
+      @current_branch ||= params[:current_branch]
+    end
+
+    def target_branch
+      @target_branch ||= params[:target_branch]
+    end
+
+    def raise_error(message)
+      raise ValidationError.new(message)
+    end
+
+    def validate
+      allowed = ::Gitlab::GitAccess.new(current_user, project).can_push_to_branch?(@target_branch)
+
+      unless allowed
+        raise_error("You are not allowed to push into this branch")
+      end
+
+      unless project.empty_repo?
+        unless repository.branch_names.include?(@current_branch)
+          raise_error("You can only create files if you are on top of a branch")
+        end
+
+        if @current_branch != @target_branch
+          if repository.branch_names.include?(@target_branch)
+            raise_error("Branch with such name already exists. You need to switch to this branch in order to make changes")
+          end
+        end
+      end
+    end
+
+    def create_target_branch
+      result = CreateBranchService.new(project, current_user).execute(@target_branch, @current_branch)
+
+      unless result[:status] == :success
+        raise_error("Something went wrong when we tried to create #{@target_branch} for you")
+      end
     end
   end
 end
diff --git a/app/services/files/create_service.rb b/app/services/files/create_service.rb
index 23833aa78ec..91d715b2d63 100644
--- a/app/services/files/create_service.rb
+++ b/app/services/files/create_service.rb
@@ -1,52 +1,30 @@
 require_relative "base_service"
 
 module Files
-  class CreateService < BaseService
-    def execute
-      allowed = Gitlab::GitAccess.new(current_user, project).can_push_to_branch?(ref)
+  class CreateService < Files::BaseService
+    def commit
+      repository.commit_file(current_user, @file_path, @file_content, @commit_message, @target_branch)
+    end
 
-      unless allowed
-        return error("You are not allowed to create file in this branch")
-      end
+    def validate
+      super
 
-      file_name = File.basename(path)
-      file_path = path
+      file_name = File.basename(@file_path)
 
       unless file_name =~ Gitlab::Regex.file_name_regex
-        return error(
+        raise_error(
           'Your changes could not be committed, because the file name ' +
           Gitlab::Regex.file_name_regex_message
         )
       end
 
-      if project.empty_repo?
-        # everything is ok because repo does not have a commits yet
-      else
-        unless repository.branch_names.include?(ref)
-          return error("You can only create files if you are on top of a branch")
-        end
-
-        blob = repository.blob_at_branch(ref, file_path)
+      unless project.empty_repo?
+        blob = repository.blob_at_branch(@current_branch, @file_path)
 
         if blob
-          return error("Your changes could not be committed, because file with such name exists")
+          raise_error("Your changes could not be committed, because file with such name exists")
         end
       end
-
-
-      new_file_action = Gitlab::Satellite::NewFileAction.new(current_user, project, ref, file_path)
-      created_successfully = new_file_action.commit!(
-        params[:content],
-        params[:commit_message],
-        params[:encoding],
-        params[:new_branch]
-      )
-
-      if created_successfully
-        success
-      else
-        error("Your changes could not be committed, because the file has been changed")
-      end
     end
   end
 end
diff --git a/app/services/files/delete_service.rb b/app/services/files/delete_service.rb
index 1497a0f883b..27c881c3430 100644
--- a/app/services/files/delete_service.rb
+++ b/app/services/files/delete_service.rb
@@ -1,36 +1,9 @@
 require_relative "base_service"
 
 module Files
-  class DeleteService < BaseService
-    def execute
-      allowed = ::Gitlab::GitAccess.new(current_user, project).can_push_to_branch?(ref)
-
-      unless allowed
-        return error("You are not allowed to push into this branch")
-      end
-
-      unless repository.branch_names.include?(ref)
-        return error("You can only create files if you are on top of a branch")
-      end
-
-      blob = repository.blob_at_branch(ref, path)
-
-      unless blob
-        return error("You can only edit text files")
-      end
-
-      delete_file_action = Gitlab::Satellite::DeleteFileAction.new(current_user, project, ref, path)
-
-      deleted_successfully = delete_file_action.commit!(
-        nil,
-        params[:commit_message]
-      )
-
-      if deleted_successfully
-        success
-      else
-        error("Your changes could not be committed, because the file has been changed")
-      end
+  class DeleteService < Files::BaseService
+    def commit
+      repository.remove_file(current_user, @file_path, @commit_message, @target_branch)
     end
   end
 end
diff --git a/app/services/files/update_service.rb b/app/services/files/update_service.rb
index 0724d3ae634..a20903c6f02 100644
--- a/app/services/files/update_service.rb
+++ b/app/services/files/update_service.rb
@@ -1,39 +1,9 @@
 require_relative "base_service"
 
 module Files
-  class UpdateService < BaseService
-    def execute
-      allowed = ::Gitlab::GitAccess.new(current_user, project).can_push_to_branch?(ref)
-
-      unless allowed
-        return error("You are not allowed to push into this branch")
-      end
-
-      unless repository.branch_names.include?(ref)
-        return error("You can only create files if you are on top of a branch")
-      end
-
-      blob = repository.blob_at_branch(ref, path)
-
-      unless blob
-        return error("You can only edit text files")
-      end
-
-      edit_file_action = Gitlab::Satellite::EditFileAction.new(current_user, project, ref, path)
-      edit_file_action.commit!(
-        params[:content],
-        params[:commit_message],
-        params[:encoding],
-        params[:new_branch]
-      )
-
-      success
-    rescue Gitlab::Satellite::CheckoutFailed => ex
-      error("Your changes could not be committed because ref '#{ref}' could not be checked out", 400)
-    rescue Gitlab::Satellite::CommitFailed => ex
-      error("Your changes could not be committed. Maybe there was nothing to commit?", 409)
-    rescue Gitlab::Satellite::PushFailed => ex
-      error("Your changes could not be committed. Maybe the file was changed by another process?", 409)
+  class UpdateService < Files::BaseService
+    def commit
+      repository.commit_file(current_user, @file_path, @file_content, @commit_message, @target_branch)
     end
   end
 end
diff --git a/app/services/git_push_service.rb b/app/services/git_push_service.rb
index 5a2c97b08af..81535450ac1 100644
--- a/app/services/git_push_service.rb
+++ b/app/services/git_push_service.rb
@@ -10,16 +10,14 @@ class GitPushService
   #
   # Next, this method:
   #  1. Creates the push event
-  #  2. Ensures that the project satellite exists
-  #  3. Updates merge requests
-  #  4. Recognizes cross-references from commit messages
-  #  5. Executes the project's web hooks
-  #  6. Executes the project's services
+  #  2. Updates merge requests
+  #  3. Recognizes cross-references from commit messages
+  #  4. Executes the project's web hooks
+  #  5. Executes the project's services
   #
   def execute(project, user, oldrev, newrev, ref)
     @project, @user = project, user
 
-    project.ensure_satellite_exists
     project.repository.expire_cache
 
     if push_remove_branch?(ref, newrev)
@@ -133,7 +131,8 @@ class GitPushService
   end
 
   def is_default_branch?(ref)
-    Gitlab::Git.branch_ref?(ref) && Gitlab::Git.ref_name(ref) == project.default_branch
+    Gitlab::Git.branch_ref?(ref) &&
+      (Gitlab::Git.ref_name(ref) == project.default_branch || project.default_branch.nil?)
   end
 
   def commit_user(commit)
diff --git a/app/services/merge_requests/auto_merge_service.rb b/app/services/merge_requests/auto_merge_service.rb
deleted file mode 100644
index cdedf48b0c0..00000000000
--- a/app/services/merge_requests/auto_merge_service.rb
+++ /dev/null
@@ -1,30 +0,0 @@
-module MergeRequests
-  # AutoMergeService class
-  #
-  # Do git merge in satellite and in case of success
-  # mark merge request as merged and execute all hooks and notifications
-  # Called when you do merge via GitLab UI
-  class AutoMergeService < BaseMergeService
-    def execute(merge_request, commit_message)
-      merge_request.lock_mr
-
-      if Gitlab::Satellite::MergeAction.new(current_user, merge_request).merge!(commit_message)
-        merge_request.merge
-
-        create_merge_event(merge_request, current_user)
-        create_note(merge_request)
-        notification_service.merge_mr(merge_request, current_user)
-        execute_hooks(merge_request, 'merge')
-
-        true
-      else
-        merge_request.unlock_mr
-        false
-      end
-    rescue
-      merge_request.unlock_mr if merge_request.locked?
-      merge_request.mark_as_unmergeable
-      false
-    end
-  end
-end
diff --git a/app/services/merge_requests/base_merge_service.rb b/app/services/merge_requests/base_merge_service.rb
deleted file mode 100644
index 9579573adf9..00000000000
--- a/app/services/merge_requests/base_merge_service.rb
+++ /dev/null
@@ -1,10 +0,0 @@
-module MergeRequests
-  class BaseMergeService < MergeRequests::BaseService
-
-    private
-
-    def create_merge_event(merge_request, current_user)
-      EventCreateService.new.merge_mr(merge_request, current_user)
-    end
-  end
-end
diff --git a/app/services/merge_requests/build_service.rb b/app/services/merge_requests/build_service.rb
index 956480938c3..a9b29f9654d 100644
--- a/app/services/merge_requests/build_service.rb
+++ b/app/services/merge_requests/build_service.rb
@@ -12,12 +12,16 @@ module MergeRequests
       merge_request.target_project ||= (project.forked_from_project || project)
       merge_request.target_branch ||= merge_request.target_project.default_branch
 
-      unless merge_request.target_branch && merge_request.source_branch
-        return build_failed(merge_request, nil)
+      if merge_request.target_branch.blank? || merge_request.source_branch.blank?
+        message =
+          if params[:source_branch] || params[:target_branch]
+            "You must select source and target branch"
+          end
+
+        return build_failed(merge_request, message)
       end
 
       compare_result = CompareService.new.execute(
-        current_user,
         merge_request.source_project,
         merge_request.source_branch,
         merge_request.target_project,
@@ -40,7 +44,6 @@ module MergeRequests
           merge_request.compare_diffs = diffs
 
         elsif diffs == false
-          # satellite timeout return false
           merge_request.can_be_created = false
           merge_request.compare_failed = true
         end
@@ -59,9 +62,6 @@ module MergeRequests
       end
 
       merge_request
-
-    rescue Gitlab::Satellite::BranchesWithoutParent
-      return build_failed(merge_request, "Selected branches have no common commit so they cannot be merged.")
     end
 
     def build_failed(merge_request, message)
diff --git a/app/services/merge_requests/merge_service.rb b/app/services/merge_requests/merge_service.rb
index 327ead4ff3f..2107529a21a 100644
--- a/app/services/merge_requests/merge_service.rb
+++ b/app/services/merge_requests/merge_service.rb
@@ -1,22 +1,57 @@
 module MergeRequests
   # MergeService class
   #
-  # Mark existing merge request as merged
-  # and execute all hooks and notifications
-  # Called when you do merge via command line and push code
-  # to target branch
-  class MergeService < BaseMergeService
+  # Do git merge and in case of success
+  # mark merge request as merged and execute all hooks and notifications
+  # Executed when you do merge via GitLab UI
+  #
+  class MergeService < MergeRequests::BaseService
+    attr_reader :merge_request, :commit_message
+
     def execute(merge_request, commit_message)
-      merge_request.merge
+      @commit_message = commit_message
+      @merge_request = merge_request
 
-      create_merge_event(merge_request, current_user)
-      create_note(merge_request)
-      notification_service.merge_mr(merge_request, current_user)
-      execute_hooks(merge_request, 'merge')
+      unless @merge_request.mergeable?
+        return error('Merge request is not mergeable')
+      end
+
+      merge_request.in_locked_state do
+        if merge_changes
+          after_merge
+          success
+        else
+          error('Can not merge changes')
+        end
+      end
+    end
+
+    private
+
+    def merge_changes
+      if sha = commit
+        after_commit(sha, merge_request.target_branch)
+      end
+    end
+
+    def commit
+      committer = repository.user_to_comitter(current_user)
+
+      options = {
+        message: commit_message,
+        author: committer,
+        committer: committer
+      }
+
+      repository.merge(merge_request.source_sha, merge_request.target_branch, options)
+    end
+
+    def after_commit(sha, branch)
+      PostCommitService.new(project, current_user).execute(sha, branch)
+    end
 
-      true
-    rescue
-      false
+    def after_merge
+      MergeRequests::PostMergeService.new(project, current_user).execute(merge_request)
     end
   end
 end
diff --git a/app/services/merge_requests/post_merge_service.rb b/app/services/merge_requests/post_merge_service.rb
new file mode 100644
index 00000000000..aceb8cb9021
--- /dev/null
+++ b/app/services/merge_requests/post_merge_service.rb
@@ -0,0 +1,22 @@
+module MergeRequests
+  # PostMergeService class
+  #
+  # Mark existing merge request as merged
+  # and execute all hooks and notifications
+  #
+  class PostMergeService < MergeRequests::BaseService
+    def execute(merge_request)
+      merge_request.mark_as_merged
+      create_merge_event(merge_request, current_user)
+      create_note(merge_request)
+      notification_service.merge_mr(merge_request, current_user)
+      execute_hooks(merge_request, 'merge')
+    end
+
+    private
+
+    def create_merge_event(merge_request, current_user)
+      EventCreateService.new.merge_mr(merge_request, current_user)
+    end
+  end
+end
diff --git a/app/services/merge_requests/refresh_service.rb b/app/services/merge_requests/refresh_service.rb
index d0648da049b..e903e48e3cd 100644
--- a/app/services/merge_requests/refresh_service.rb
+++ b/app/services/merge_requests/refresh_service.rb
@@ -33,9 +33,9 @@ module MergeRequests
 
 
       merge_requests.uniq.select(&:source_project).each do |merge_request|
-        MergeRequests::MergeService.
+        MergeRequests::PostMergeService.
           new(merge_request.target_project, @current_user).
-          execute(merge_request, nil)
+          execute(merge_request)
       end
     end
 
diff --git a/app/services/post_commit_service.rb b/app/services/post_commit_service.rb
new file mode 100644
index 00000000000..8592c8d238b
--- /dev/null
+++ b/app/services/post_commit_service.rb
@@ -0,0 +1,71 @@
+class PostCommitService < BaseService
+  include Gitlab::Popen
+
+  attr_reader :changes, :repo_path
+
+  def execute(sha, branch)
+    commit = repository.commit(sha)
+    full_ref = Gitlab::Git::BRANCH_REF_PREFIX + branch
+    old_sha = commit.parent_id || Gitlab::Git::BLANK_SHA
+    @changes = "#{old_sha} #{sha} #{full_ref}"
+    @repo_path = repository.path_to_repo
+
+    post_receive
+  end
+
+  private
+
+  def post_receive
+    hook = hook_file('post-receive', repo_path)
+    return true if hook.nil?
+    call_receive_hook(hook)
+  end
+
+  def call_receive_hook(hook)
+    # function  will return true if succesful
+    exit_status = false
+
+    vars = {
+      'GL_ID' => Gitlab::ShellEnv.gl_id(current_user),
+      'PWD' => repo_path
+    }
+
+    options = {
+      chdir: repo_path
+    }
+
+    # we combine both stdout and stderr as we don't know what stream
+    # will be used by the custom hook
+    Open3.popen2e(vars, hook, options) do |stdin, stdout_stderr, wait_thr|
+      exit_status = true
+      stdin.sync = true
+
+      # in git, pre- and post- receive hooks may just exit without
+      # reading stdin. We catch the exception to avoid a broken pipe
+      # warning
+      begin
+        # inject all the changes as stdin to the hook
+        changes.lines do |line|
+          stdin.puts line
+        end
+      rescue Errno::EPIPE
+      end
+
+      # need to close stdin before reading stdout
+      stdin.close
+
+      # only output stdut_stderr if scripts doesn't return 0
+      unless wait_thr.value == 0
+        exit_status = false
+      end
+    end
+
+    exit_status
+  end
+
+  def hook_file(hook_type, repo_path)
+    hook_path = File.join(repo_path.strip, 'hooks')
+    hook_file = "#{hook_path}/#{hook_type}"
+    hook_file if File.exist?(hook_file)
+  end
+end
diff --git a/app/services/projects/destroy_service.rb b/app/services/projects/destroy_service.rb
index 403f419ec50..28872c89259 100644
--- a/app/services/projects/destroy_service.rb
+++ b/app/services/projects/destroy_service.rb
@@ -27,7 +27,6 @@ module Projects
         end
       end
 
-      project.satellite.destroy
       log_info("Project \"#{project.name}\" was removed")
       system_hook_service.execute_hooks_for(project, :destroy)
       true
diff --git a/app/services/projects/transfer_service.rb b/app/services/projects/transfer_service.rb
index f43c0ef70e9..550ed6897dd 100644
--- a/app/services/projects/transfer_service.rb
+++ b/app/services/projects/transfer_service.rb
@@ -33,9 +33,6 @@ module Projects
           raise TransferError.new("Project with same path in target namespace already exists")
         end
 
-        # Remove old satellite
-        project.satellite.destroy
-
         # Apply new namespace id
         project.namespace = new_namespace
         project.save!
@@ -51,9 +48,6 @@ module Projects
         # Move wiki repo also if present
         gitlab_shell.mv_repository("#{old_path}.wiki", "#{new_path}.wiki")
 
-        # Create a new satellite (reload project from DB)
-        Project.find(project.id).ensure_satellite_exists
-
         # clear project cached events
         project.reset_events_cache
 
diff --git a/app/views/projects/blob/_editor.html.haml b/app/views/projects/blob/_editor.html.haml
index 96f188e4aa7..9c3e1703c89 100644
--- a/app/views/projects/blob/_editor.html.haml
+++ b/app/views/projects/blob/_editor.html.haml
@@ -12,8 +12,8 @@
         \/
         = text_field_tag 'file_name', params[:file_name], placeholder: "File name",
           required: true, class: 'form-control new-file-name'
-        .pull-right
-          = select_tag :encoding, options_for_select([ "base64", "text" ], "text"), class: 'form-control'
+      .pull-right
+        = select_tag :encoding, options_for_select([ "base64", "text" ], "text"), class: 'form-control'
 
   .file-content.code
     %pre.js-edit-mode-pane#editor
diff --git a/app/views/projects/blob/new.html.haml b/app/views/projects/blob/new.html.haml
index dac984f8c31..7c2a4fece94 100644
--- a/app/views/projects/blob/new.html.haml
+++ b/app/views/projects/blob/new.html.haml
@@ -6,11 +6,12 @@
     = render 'shared/commit_message_container', params: params,
              placeholder: 'Add new file'
 
-    .form-group.branch
-      = label_tag 'branch', class: 'control-label' do
-        Branch
-      .col-sm-10
-        = text_field_tag 'new_branch', @ref, class: "form-control"
+    - unless @project.empty_repo?
+      .form-group.branch
+        = label_tag 'branch', class: 'control-label' do
+          Branch
+        .col-sm-10
+          = text_field_tag 'new_branch', @ref, class: "form-control"
 
     = hidden_field_tag 'content', '', id: 'file-content'
     = render 'projects/commit_button', ref: @ref,
diff --git a/app/views/projects/merge_requests/_new_compare.html.haml b/app/views/projects/merge_requests/_new_compare.html.haml
index ff9c0cdb283..7709330611a 100644
--- a/app/views/projects/merge_requests/_new_compare.html.haml
+++ b/app/views/projects/merge_requests/_new_compare.html.haml
@@ -35,7 +35,7 @@
     - if @merge_request.compare_failed
       .alert.alert-danger
         %h4 Compare failed
-        %p We can't compare selected branches. It may be because of huge diff or satellite timeout. Please try again or select different branches.
+        %p We can't compare selected branches. It may be because of huge diff. Please try again or select different branches.
     - else
       .light-well
         .center
diff --git a/app/views/projects/merge_requests/_new_submit.html.haml b/app/views/projects/merge_requests/_new_submit.html.haml
index 633a54f3620..76f44211dac 100644
--- a/app/views/projects/merge_requests/_new_submit.html.haml
+++ b/app/views/projects/merge_requests/_new_submit.html.haml
@@ -24,7 +24,7 @@
         = icon('history')
         Commits
         %span.badge= @commits.size
-    %li.diffs-tab
+    %li.diffs-tab.active
       = link_to url_for(params), data: {target: '#diffs', action: 'diffs', toggle: 'tab'} do
         = icon('list-alt')
         Changes
@@ -33,7 +33,7 @@
   .tab-content
     #commits.commits.tab-pane
       = render "projects/commits/commits", project: @project
-    #diffs.diffs.tab-pane
+    #diffs.diffs.tab-pane.active
       - if @diffs.present?
         = render "projects/diffs/diffs", diffs: @diffs, project: @project
       - elsif @commits.size > MergeRequestDiff::COMMITS_SAFE_SIZE
diff --git a/app/views/projects/merge_requests/_show.html.haml b/app/views/projects/merge_requests/_show.html.haml
index c57eee14143..2662e3aff6b 100644
--- a/app/views/projects/merge_requests/_show.html.haml
+++ b/app/views/projects/merge_requests/_show.html.haml
@@ -6,40 +6,25 @@
     = render "projects/merge_requests/show/mr_box"
     %hr
     .append-bottom-20
-      .slead
-        %span From
-        - if @merge_request.for_fork?
-          %strong.label-branch<
-            - if @merge_request.source_project
-              = link_to @merge_request.source_project_namespace, namespace_project_path(@merge_request.source_project.namespace, @merge_request.source_project)
-            - else
-              \ #{@merge_request.source_project_namespace}
-            \:#{@merge_request.source_branch}
+      - if @merge_request.open?
+        .btn-group.btn-group-sm.pull-right
+          %a.btn.btn-sm.dropdown-toggle{ data: {toggle: :dropdown} }
+            = icon('download')
+            Download as
+            %span.caret
+          %ul.dropdown-menu
+            %li= link_to "Email Patches", merge_request_path(@merge_request, format: :patch)
+            %li= link_to "Plain Diff",    merge_request_path(@merge_request, format: :diff)
+      .light
+        %div
+          %span From
+          %span.label-branch #{source_branch_with_namespace(@merge_request)}
           %span into
-          %strong.label-branch #{@merge_request.target_project_namespace}:#{@merge_request.target_branch}
-        - else
-          %strong.label-branch #{@merge_request.source_branch}
-          %span into
-          %strong.label-branch #{@merge_request.target_branch}
-        - if @merge_request.open?
-          .btn-group.btn-group-sm.pull-right
-            %a.btn.btn-sm.dropdown-toggle{ data: {toggle: :dropdown} }
-              = icon('download')
-              Download as
-              %span.caret
-            %ul.dropdown-menu
-              %li= link_to "Email Patches", merge_request_path(@merge_request, format: :patch)
-              %li= link_to "Plain Diff",    merge_request_path(@merge_request, format: :diff)
-
-    - if @merge_request.open? and @merge_request.source_branch_exists?
-      .append-bottom-20
-        .slead
-          %span
-            Fetch the branch with
-            %strong.label-branch<
-              git fetch
-              \ #{@merge_request.source_project.http_url_to_repo}
-              \ #{@merge_request.source_branch}
+          %span.label-branch #{@merge_request.target_branch}
+        - if @merge_request.open? && !@merge_request.branch_missing?
+          %div
+            If you want to try or merge this request manually, you can use the
+            = link_to "command line", "#modal_merge_info", class: "how_to_merge_link vlink", title: "How To Merge", "data-toggle" => "modal"
 
     = render "projects/merge_requests/show/how_to_merge"
     = render "projects/merge_requests/widget/show.html.haml"
diff --git a/app/views/projects/merge_requests/automerge.js.haml b/app/views/projects/merge_requests/merge.js.haml
index 33321651e32..33321651e32 100644
--- a/app/views/projects/merge_requests/automerge.js.haml
+++ b/app/views/projects/merge_requests/merge.js.haml
diff --git a/app/views/projects/merge_requests/show/_commits.html.haml b/app/views/projects/merge_requests/show/_commits.html.haml
index 3b7f283daf0..a71b181a6a5 100644
--- a/app/views/projects/merge_requests/show/_commits.html.haml
+++ b/app/views/projects/merge_requests/show/_commits.html.haml
@@ -1 +1 @@
-= render "projects/commits/commits", project: @merge_request.source_project
+= render "projects/commits/commits", project: @merge_request.project
diff --git a/app/views/projects/merge_requests/show/_diffs.html.haml b/app/views/projects/merge_requests/show/_diffs.html.haml
index 786b5f39063..626970f39be 100644
--- a/app/views/projects/merge_requests/show/_diffs.html.haml
+++ b/app/views/projects/merge_requests/show/_diffs.html.haml
@@ -1,5 +1,5 @@
 - if @merge_request_diff.collected?
-  = render "projects/diffs/diffs", diffs: @merge_request.diffs, project: @merge_request.source_project
+  = render "projects/diffs/diffs", diffs: @merge_request.diffs, project: @merge_request.project
 - elsif @merge_request_diff.empty?
   .nothing-here-block Nothing to merge from #{@merge_request.source_branch} into #{@merge_request.target_branch}
 - else
diff --git a/app/views/projects/merge_requests/show/_how_to_merge.html.haml b/app/views/projects/merge_requests/show/_how_to_merge.html.haml
index 22f601ac99e..db1575f899a 100644
--- a/app/views/projects/merge_requests/show/_how_to_merge.html.haml
+++ b/app/views/projects/merge_requests/show/_how_to_merge.html.haml
@@ -3,42 +3,45 @@
     .modal-content
       .modal-header
         %a.close{href: "#", "data-dismiss" => "modal"} ×
-        %h3 How to merge
+        %h3 Check out, review and merge locally
       .modal-body
-        - if @merge_request.for_fork?
-          - source_remote = @merge_request.source_project.namespace.nil? ? "source" :@merge_request.source_project.namespace.path
-          - target_remote = @merge_request.target_project.namespace.nil? ? "target" :@merge_request.target_project.namespace.path
-          %p
-            %strong Step 1.
-            Fetch the code and create a new branch pointing to it
-          %pre.dark
+        %p
+          %strong Step 1. 
+          Fetch and check out the branch for this merge request
+        %pre.dark
+          - if @merge_request.for_fork?
             :preserve
               git fetch #{@merge_request.source_project.http_url_to_repo} #{@merge_request.source_branch}
               git checkout -b #{@merge_request.source_project_path}-#{@merge_request.source_branch} FETCH_HEAD
-          %p
-            %strong Step 2.
-            Merge the branch and push the changes to GitLab
-          %pre.dark
-            :preserve
-              git checkout #{@merge_request.target_branch}
-              git merge --no-ff #{@merge_request.source_project_path}-#{@merge_request.source_branch}
-              git push origin #{@merge_request.target_branch}
-        - else
-          %p
-            %strong Step 1.
-            Update the repo and checkout the branch we are going to merge
-          %pre.dark
+          - else
             :preserve
               git fetch origin
               git checkout -b #{@merge_request.source_branch} origin/#{@merge_request.source_branch}
-          %p
-            %strong Step 2.
-            Merge the branch and push the changes to GitLab
-          %pre.dark
+        %p
+          %strong Step 2.
+          Review the changes locally
+
+        %p
+          %strong Step 3.
+          Merge the branch and fix any conflicts that come up
+        %pre.dark
+          - if @merge_request.for_fork?
+            :preserve
+              git checkout #{@merge_request.target_branch}
+              git merge --no-ff #{@merge_request.source_project_path}-#{@merge_request.source_branch}
+          - else
             :preserve
               git checkout #{@merge_request.target_branch}
               git merge --no-ff #{@merge_request.source_branch}
-              git push origin #{@merge_request.target_branch}
+        %p
+          %strong Step 4.
+          Push the result of the merge to GitLab
+        %pre.dark
+          :preserve
+            git push origin #{@merge_request.target_branch}
+        - unless @merge_request.can_be_merged_by?(current_user)
+          %p
+            Note that pushing to GitLab requires write access to this repository.
 
 :javascript
   $(function(){
diff --git a/app/views/projects/merge_requests/widget/_closed.html.haml b/app/views/projects/merge_requests/widget/_closed.html.haml
index b5704c502c8..f3cc0e7e8a1 100644
--- a/app/views/projects/merge_requests/widget/_closed.html.haml
+++ b/app/views/projects/merge_requests/widget/_closed.html.haml
@@ -6,4 +6,7 @@
       - if @merge_request.closed_event
         by #{link_to_member(@project, @merge_request.closed_event.author, avatar: true)}
         #{time_ago_with_tooltip(@merge_request.closed_event.created_at)}
-    %p Changes were not merged into target branch
+    %p 
+      = succeed '.' do
+        The changes were not merged into
+        %span.label-branch= @merge_request.target_branch
diff --git a/app/views/projects/merge_requests/widget/_heading.html.haml b/app/views/projects/merge_requests/widget/_heading.html.haml
index f04eac0e3bb..4d4e2f68f61 100644
--- a/app/views/projects/merge_requests/widget/_heading.html.haml
+++ b/app/views/projects/merge_requests/widget/_heading.html.haml
@@ -1,49 +1,28 @@
 - if @merge_request.has_ci?
   .mr-widget-heading
-    .ci_widget.ci-success{style: "display:none"}
-      = icon("check")
-      %span CI build passed
-      for #{@merge_request.last_commit_short_sha}.
-      = link_to "View build page", ci_build_details_path(@merge_request), :"data-no-turbolink" => "data-no-turbolink"
-
-    .ci_widget.ci-skipped{style: "display:none"}
-      = icon("check")
-      %span CI build skipped
-      for #{@merge_request.last_commit_short_sha}.
-      = link_to "View build page", ci_build_details_path(@merge_request), :"data-no-turbolink" => "data-no-turbolink"
-
-    .ci_widget.ci-failed{style: "display:none"}
-      = icon("times")
-      %span CI build failed
-      for #{@merge_request.last_commit_short_sha}.
-      = link_to "View build page", ci_build_details_path(@merge_request), :"data-no-turbolink" => "data-no-turbolink"
-
-    - [:running, :pending].each do |status|
+    - [:success, :skipped, :canceled, :failed, :running, :pending].each do |status|
       .ci_widget{class: "ci-#{status}", style: "display:none"}
-        = icon("clock-o")
+        - if status == :success
+          - status = "passed"
+          = icon("check-circle")
+        - else
+          = icon("circle")
         %span CI build #{status}
         for #{@merge_request.last_commit_short_sha}.
-        = link_to "View build page", ci_build_details_path(@merge_request), :"data-no-turbolink" => "data-no-turbolink"
+        %span.ci-coverage
+        = link_to "View build details", ci_build_details_path(@merge_request), :"data-no-turbolink" => "data-no-turbolink"
 
     .ci_widget
       = icon("spinner spin")
-      Checking for CI status for #{@merge_request.last_commit_short_sha}
+      Checking CI status for #{@merge_request.last_commit_short_sha}&hellip;
 
     .ci_widget.ci-not_found{style: "display:none"}
-      = icon("times")
-      %span Can not find commit in the CI server
-      for #{@merge_request.last_commit_short_sha}.
-      
-
-    .ci_widget.ci-canceled{style: "display:none"}
-      = icon("times")
-      %span CI build canceled
-      for #{@merge_request.last_commit_short_sha}.
-      = link_to "View build page", ci_build_details_path(@merge_request), :"data-no-turbolink" => "data-no-turbolink"
+      = icon("times-circle")
+      Could not find CI status for #{@merge_request.last_commit_short_sha}.
 
     .ci_widget.ci-error{style: "display:none"}
-      = icon("times")
-      %span Cannot connect to the CI server. Please check your settings and try again.
+      = icon("times-circle")
+      Could not connect to the CI server. Please check your settings and try again.
 
   :coffeescript
     $ ->
diff --git a/app/views/projects/merge_requests/widget/_locked.html.haml b/app/views/projects/merge_requests/widget/_locked.html.haml
index 13ec278847b..78d0783cba0 100644
--- a/app/views/projects/merge_requests/widget/_locked.html.haml
+++ b/app/views/projects/merge_requests/widget/_locked.html.haml
@@ -2,7 +2,8 @@
   = render 'projects/merge_requests/widget/heading'
   .mr-widget-body
     %h4
-      Merge in progress...
+      = icon("spinner spin")
+      Merge in progress&hellip;
     %p
-      Merging is in progress. While merging this request is locked and cannot be closed.
+      This merge request is in the process of being merged, during which time it is locked and cannot be closed.
 
diff --git a/app/views/projects/merge_requests/widget/_merged.html.haml b/app/views/projects/merge_requests/widget/_merged.html.haml
index a3b13140810..d22dfa085b8 100644
--- a/app/views/projects/merge_requests/widget/_merged.html.haml
+++ b/app/views/projects/merge_requests/widget/_merged.html.haml
@@ -7,23 +7,31 @@
         by #{link_to_member(@project, @merge_request.merge_event.author, avatar: true)}
         #{time_ago_with_tooltip(@merge_request.merge_event.created_at)}
     %div
-      - if @source_branch.blank?
-        Source branch has been removed
+      - if !@merge_request.source_branch_exists?
+        = succeed '.' do
+          The changes were merged into
+          %span.label-branch= @merge_request.target_branch
+        The source branch has been removed.
 
-      - elsif can_remove_branch?(@merge_request.source_project, @merge_request.source_branch) && @merge_request.merged?
+      - elsif can_remove_branch?(@merge_request.source_project, @merge_request.source_branch)
         .remove_source_branch_widget
-          %p Changes merged into #{@merge_request.target_branch}. You can remove source branch now
+          %p 
+            = succeed '.' do
+              The changes were merged into
+              %span.label-branch= @merge_request.target_branch
+            You can remove the source branch now.
           = link_to namespace_project_branch_path(@merge_request.source_project.namespace, @merge_request.source_project, @source_branch), remote: true, method: :delete, class: "btn btn-primary btn-sm remove_source_branch" do
             %i.fa.fa-times
             Remove Source Branch
 
         .remove_source_branch_widget.failed.hide
-          Failed to remove source branch '#{@merge_request.source_branch}'
+          %p 
+            Failed to remove source branch '#{@merge_request.source_branch}'.
 
         .remove_source_branch_in_progress.hide
-          %i.fa.fa-spinner.fa-spin
-          &nbsp;
-          Removing source branch '#{@merge_request.source_branch}'. Please wait. Page will be automatically reloaded. &nbsp;
+          %p
+            = icon('spinner spin')
+            Removing source branch '#{@merge_request.source_branch}'. Please wait. This page will be automatically reload.
 
         :coffeescript
           $('.remove_source_branch').on 'click', ->
diff --git a/app/views/projects/merge_requests/widget/_open.html.haml b/app/views/projects/merge_requests/widget/_open.html.haml
index bb794912f8f..0aad9bb3e88 100644
--- a/app/views/projects/merge_requests/widget/_open.html.haml
+++ b/app/views/projects/merge_requests/widget/_open.html.haml
@@ -3,8 +3,6 @@
   .mr-widget-body
     - if @project.archived?
       = render 'projects/merge_requests/widget/open/archived'
-    - elsif !@project.satellite.exists?
-      = render 'projects/merge_requests/widget/open/no_satellite'
     - elsif @merge_request.commits.blank?
       = render 'projects/merge_requests/widget/open/nothing'
     - elsif @merge_request.branch_missing?
@@ -24,6 +22,6 @@
     .mr-widget-footer
       %span
         %i.fa.fa-check
-        Accepting this merge request will close #{@closes_issues.size == 1 ? 'issue' : 'issues'}
+        Accepting this merge request will close #{"issue".pluralize(@closes_issues.size)}
         = succeed '.' do
           != gfm(issues_sentence(@closes_issues))
diff --git a/app/views/projects/merge_requests/widget/_show.html.haml b/app/views/projects/merge_requests/widget/_show.html.haml
index 263cab7a9e8..a489d4f9b24 100644
--- a/app/views/projects/merge_requests/widget/_show.html.haml
+++ b/app/views/projects/merge_requests/widget/_show.html.haml
@@ -11,10 +11,10 @@
   var merge_request_widget;
 
   merge_request_widget = new MergeRequestWidget({
-    url_to_automerge_check: "#{automerge_check_namespace_project_merge_request_path(@project.namespace, @project, @merge_request)}",
+    url_to_automerge_check: "#{merge_check_namespace_project_merge_request_path(@project.namespace, @project, @merge_request)}",
     check_enable: #{@merge_request.unchecked? ? "true" : "false"},
     url_to_ci_check: "#{ci_status_namespace_project_merge_request_path(@project.namespace, @project, @merge_request)}",
     ci_enable: #{@project.ci_service ? "true" : "false"},
-    current_status: "#{@merge_request.automerge_status}",
+    current_status: "#{@merge_request.gitlab_merge_status}",
   });
 
diff --git a/app/views/projects/merge_requests/widget/open/_accept.html.haml b/app/views/projects/merge_requests/widget/open/_accept.html.haml
index f5bacaf280a..e1525f6aeb7 100644
--- a/app/views/projects/merge_requests/widget/open/_accept.html.haml
+++ b/app/views/projects/merge_requests/widget/open/_accept.html.haml
@@ -1,4 +1,4 @@
-= form_for [:automerge, @project.namespace.becomes(Namespace), @project, @merge_request], remote: true, method: :post, html: { class: 'accept-mr-form js-requires-input' } do |f|
+= form_for [:merge, @project.namespace.becomes(Namespace), @project, @merge_request], remote: true, method: :post, html: { class: 'accept-mr-form js-requires-input' } do |f|
   = hidden_field_tag :authenticity_token, form_authenticity_token
   .accept-merge-holder.clearfix.js-toggle-container
     .accept-action
@@ -8,22 +8,16 @@
       .accept-control.checkbox
         = label_tag :should_remove_source_branch, class: "remove_source_checkbox" do
           = check_box_tag :should_remove_source_branch
-          Remove source-branch
+          Remove source branch
     .accept-control
-      = link_to "#", class: "modify-merge-commit-link js-toggle-button", title: "Modify merge commit message" do
-        %i.fa.fa-edit
+      = link_to "#", class: "modify-merge-commit-link js-toggle-button" do
+        = icon('edit')
         Modify commit message
     .js-toggle-content.hide.prepend-top-20
       = render 'shared/commit_message_container', params: params,
           text: @merge_request.merge_commit_message,
           rows: 14, hint: true
 
-  %br
-  .light
-    If you want to merge this request manually, you can use the
-    %strong
-      = link_to "command line", "#modal_merge_info", class: "how_to_merge_link vlink", title: "How To Merge", "data-toggle" => "modal"
-
   :coffeescript
     $('.accept-mr-form').on 'ajax:before', ->
       btn = $('.accept_merge_request')
diff --git a/app/views/projects/merge_requests/widget/open/_archived.html.haml b/app/views/projects/merge_requests/widget/open/_archived.html.haml
index eaf113ee568..ab30fa6b243 100644
--- a/app/views/projects/merge_requests/widget/open/_archived.html.haml
+++ b/app/views/projects/merge_requests/widget/open/_archived.html.haml
@@ -1,2 +1,4 @@
+%h4 
+  Project is archived
 %p
-  %strong Archived projects do not provide commit access.
+  This merge request cannot be merged because archived projects cannot be written to.
diff --git a/app/views/projects/merge_requests/widget/open/_check.html.haml b/app/views/projects/merge_requests/widget/open/_check.html.haml
index e775447cb75..b6b8974297e 100644
--- a/app/views/projects/merge_requests/widget/open/_check.html.haml
+++ b/app/views/projects/merge_requests/widget/open/_check.html.haml
@@ -1,6 +1,6 @@
 %strong
-  %i.fa.fa-spinner.fa-spin
-  Checking automatic merge…
+  = icon("spinner spin")
+  Checking ability to merge automatically&hellip;
 
 :coffeescript
   $ ->
diff --git a/app/views/projects/merge_requests/widget/open/_conflicts.html.haml b/app/views/projects/merge_requests/widget/open/_conflicts.html.haml
index 7dc3b4eb2cc..e6c089fefb2 100644
--- a/app/views/projects/merge_requests/widget/open/_conflicts.html.haml
+++ b/app/views/projects/merge_requests/widget/open/_conflicts.html.haml
@@ -1,10 +1,10 @@
-- if @merge_request.can_be_merged_by?(current_user)
-  %h4
-    This merge request contains merge conflicts that must be resolved.
-  %p
-    You can merge it manually using the
-    %strong
-      = link_to "command line", "#modal_merge_info", class: "how_to_merge_link vlink", title: "How To Merge", "data-toggle" => "modal"
-- else
-  %strong This merge request contains merge conflicts that must be resolved.
-  Only those with write access to this repository can merge merge requests.
+%h4
+  = icon("exclamation-triangle")
+  This merge request contains merge conflicts
+
+%p
+  Please resolve these conflicts or 
+  - if @merge_request.can_be_merged_by?(current_user)
+    #{link_to "merge this request manually", "#modal_merge_info", class: "how_to_merge_link vlink", "data-toggle" => "modal"}.
+  - else
+    ask someone with write access to this repository to merge this request manually.
diff --git a/app/views/projects/merge_requests/widget/open/_missing_branch.html.haml b/app/views/projects/merge_requests/widget/open/_missing_branch.html.haml
index 1c565bae80a..c9f07629493 100644
--- a/app/views/projects/merge_requests/widget/open/_missing_branch.html.haml
+++ b/app/views/projects/merge_requests/widget/open/_missing_branch.html.haml
@@ -1,16 +1,16 @@
-%h4
-  Can't be merged
-%p
-  This merge request can not be accepted because branch
-  - unless @merge_request.source_branch_exists?
-    %span.label.label-inverse= @merge_request.source_branch
-    does not exist in
-    %span.label.label-info= @merge_request.source_project_path
-    %br
-    %strong Please close this merge request and open a new merge request to change source branches.
-  - else
-    %span.label.label-inverse= @merge_request.target_branch
-    does not exist in
-    %span.label.label-info= @merge_request.target_project_path
-    %br
-    %strong Please close this merge request or change to another target branch.
+- unless @merge_request.source_branch_exists?
+  %h4
+    = icon("exclamation-triangle")
+    Source branch
+    %span.label-branch= source_branch_with_namespace(@merge_request)
+    does not exist
+  %p
+    Please restore the source branch or close this merge request and open a new merge request with a different source branch.
+- else
+  %h4
+    = icon("exclamation-triangle")
+    Target branch
+    %span.label-branch= @merge_request.target_branch
+    does not exist
+  %p
+    Please restore the target branch or use a different target branch.
diff --git a/app/views/projects/merge_requests/widget/open/_no_satellite.html.haml b/app/views/projects/merge_requests/widget/open/_no_satellite.html.haml
deleted file mode 100644
index 3718cfd8333..00000000000
--- a/app/views/projects/merge_requests/widget/open/_no_satellite.html.haml
+++ /dev/null
@@ -1,3 +0,0 @@
-%p
-  %span
-    %strong This repository does not have a satellite. Please ask an administrator to fix this issue!
diff --git a/app/views/projects/merge_requests/widget/open/_not_allowed.html.haml b/app/views/projects/merge_requests/widget/open/_not_allowed.html.haml
index 82f6ffd8fcb..a8145558ca8 100644
--- a/app/views/projects/merge_requests/widget/open/_not_allowed.html.haml
+++ b/app/views/projects/merge_requests/widget/open/_not_allowed.html.haml
@@ -1,2 +1,4 @@
-%strong This request can be merged automatically.
-Only those with write access to this repository can merge merge requests.
+%h4 
+  Ready to be merged automatically
+%p
+  Ask someone with write access to this repository to merge this request.
diff --git a/app/views/projects/merge_requests/widget/open/_nothing.html.haml b/app/views/projects/merge_requests/widget/open/_nothing.html.haml
index 4d526576bc2..35626b624b7 100644
--- a/app/views/projects/merge_requests/widget/open/_nothing.html.haml
+++ b/app/views/projects/merge_requests/widget/open/_nothing.html.haml
@@ -1,8 +1,8 @@
-%h4 Nothing to merge
-%p
+%h4 
+  = icon("exclamation-triangle")
   Nothing to merge from
-  %span.label-branch #{@merge_request.source_branch}
-  to
-  %span.label-branch #{@merge_request.target_branch}
-  %br
-  Try to use different branches or push new code.
+  %span.label-branch= source_branch_with_namespace(@merge_request)
+  into
+  %span.label-branch= @merge_request.target_branch
+%p
+  Please push new commits to the source branch or use a different target branch.
diff --git a/app/views/projects/merge_requests/widget/open/_reload.html.haml b/app/views/projects/merge_requests/widget/open/_reload.html.haml
index 5787f6efea4..acfc31725eb 100644
--- a/app/views/projects/merge_requests/widget/open/_reload.html.haml
+++ b/app/views/projects/merge_requests/widget/open/_reload.html.haml
@@ -1 +1,6 @@
-This merge request cannot be merged. Try to reload the page.
+%h4
+  = icon("exclamation-triangle")
+  This merge request failed to be merged automatically
+
+%p
+  Please reload the page to find out the reason.
diff --git a/app/views/projects/merge_requests/widget/open/_wip.html.haml b/app/views/projects/merge_requests/widget/open/_wip.html.haml
index 4ce3ab31278..0cf16542cc1 100644
--- a/app/views/projects/merge_requests/widget/open/_wip.html.haml
+++ b/app/views/projects/merge_requests/widget/open/_wip.html.haml
@@ -1,13 +1,5 @@
-- if @merge_request.can_be_merged_by?(current_user)
-  %h4
-    This merge request cannot be accepted because it is marked as Work In Progress.
+%h4
+  This merge request is currently a Work In Progress
 
-  %p
-    %button.btn.disabled{:type => 'button'}
-      %i.fa.fa-warning
-      Accept Merge Request
-    &nbsp;
-    When the merge request is ready, remove the "WIP" prefix from the title to allow it to be accepted.
-- else
-  %strong This merge request is marked as Work In Progress.
-  Only those with write access to this repository can merge merge requests.
+%p
+  When this merge request is ready, remove the "WIP" prefix from the title to allow it to be merged.
diff --git a/app/views/shared/issuable/_form.html.haml b/app/views/shared/issuable/_form.html.haml
index ac8c1936c9e..3489bf3f191 100644
--- a/app/views/shared/issuable/_form.html.haml
+++ b/app/views/shared/issuable/_form.html.haml
@@ -16,10 +16,10 @@
       %p.help-block
         - if issuable.work_in_progress?
           Remove the <code>WIP</code> prefix from the title to allow this
-          <strong>Work In Progress</strong> merge request to be accepted when it's ready.
+          <strong>Work In Progress</strong> merge request to be merged when it's ready.
         - else
           Start the title with <code>[WIP]</code> or <code>WIP:</code> to prevent a
-          <strong>Work In Progress</strong> merge request from being accepted before it's ready.
+          <strong>Work In Progress</strong> merge request from being merged before it's ready.
 .form-group.issuable-description
   = f.label :description, 'Description', class: 'control-label'
   .col-sm-10
diff --git a/app/workers/auto_merge_worker.rb b/app/workers/auto_merge_worker.rb
deleted file mode 100644
index a6dd73eee5f..00000000000
--- a/app/workers/auto_merge_worker.rb
+++ /dev/null
@@ -1,13 +0,0 @@
-class AutoMergeWorker
-  include Sidekiq::Worker
-
-  sidekiq_options queue: :default
-
-  def perform(merge_request_id, current_user_id, params)
-    params = params.with_indifferent_access
-    current_user = User.find(current_user_id)
-    merge_request = MergeRequest.find(merge_request_id)
-    merge_request.should_remove_source_branch = params[:should_remove_source_branch]
-    merge_request.automerge!(current_user, params[:commit_message])
-  end
-end
diff --git a/app/workers/merge_worker.rb b/app/workers/merge_worker.rb
new file mode 100644
index 00000000000..6a8665c179a
--- /dev/null
+++ b/app/workers/merge_worker.rb
@@ -0,0 +1,19 @@
+class MergeWorker
+  include Sidekiq::Worker
+
+  sidekiq_options queue: :default
+
+  def perform(merge_request_id, current_user_id, params)
+    params = params.with_indifferent_access
+    current_user = User.find(current_user_id)
+    merge_request = MergeRequest.find(merge_request_id)
+
+    result = MergeRequests::MergeService.new(merge_request.target_project, current_user).
+      execute(merge_request, params[:commit_message])
+
+    if result[:status] == :success && params[:should_remove_source_branch].present?
+      DeleteBranchService.new(merge_request.source_project, current_user).
+        execute(merge_request.source_branch)
+    end
+  end
+end
diff --git a/app/workers/repository_import_worker.rb b/app/workers/repository_import_worker.rb
index 94832872d13..b546f8777e1 100644
--- a/app/workers/repository_import_worker.rb
+++ b/app/workers/repository_import_worker.rb
@@ -27,7 +27,6 @@ class RepositoryImportWorker
 
     project.import_finish
     project.save
-    project.satellite.create unless project.satellite.exists?
     ProjectCacheWorker.perform_async(project.id)
     Gitlab::BitbucketImport::KeyDeleter.new(project).execute if project.import_type == 'bitbucket'
   end