skip email trim when email is creating new issue

changelogs/unreleased/issue-25256.yml

+---
+title: Don't trim incoming emails that create new issues
+merge_request:
+author: Cameron Crockett
+type: fixed

lib/gitlab/email/handler/create_issue_handler.rb

@@ -47,7 +47,7 @@ module Gitlab
             project,
             author,
             title:       mail.subject,
-            description: message
+            description: message_including_reply
           ).execute
         end
       end

lib/gitlab/email/handler/reply_processing.rb

@@ -16,8 +16,12 @@ module Gitlab
           @message ||= process_message
         end
 
-        def process_message
-          message = ReplyParser.new(mail).execute.strip
+        def message_including_reply
+          @message_with_reply ||= process_message(trim_reply: false)
+        end
+
+        def process_message(**kwargs)
+          message = ReplyParser.new(mail, **kwargs).execute.strip
           add_attachments(message)
         end
 

lib/gitlab/email/reply_parser.rb

@@ -4,8 +4,9 @@ module Gitlab
     class ReplyParser
       attr_accessor :message
 
-      def initialize(message)
+      def initialize(message, trim_reply: true)
         @message = message
+        @trim_reply = trim_reply
       end
 
       def execute
@@ -13,7 +14,9 @@ module Gitlab
 
         encoding = body.encoding
 
-        body = EmailReplyTrimmer.trim(body)
+        if @trim_reply
+          body = EmailReplyTrimmer.trim(body)
+        end
 
         return '' unless body
 

spec/fixtures/emails/valid_new_issue_with_quote.eml

+Return-Path: <jake@adventuretime.ooo>
+Received: from iceking.adventuretime.ooo ([unix socket]) by iceking (Cyrus v2.2.13-Debian-2.2.13-19+squeeze3) with LMTPA; Thu, 13 Jun 2013 17:03:50 -0400
+Received: from mail-ie0-x234.google.com (mail-ie0-x234.google.com [IPv6:2607:f8b0:4001:c03::234]) by iceking.adventuretime.ooo (8.14.3/8.14.3/Debian-9.4) with ESMTP id r5DL3nFJ016967 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for <incoming+gitlabhq/gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 17:03:50 -0400
+Received: by mail-ie0-f180.google.com with SMTP id f4so21977375iea.25 for <incoming+gitlabhq/gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 14:03:48 -0700
+Received: by 10.0.0.1 with HTTP; Thu, 13 Jun 2013 14:03:48 -0700
+Date: Thu, 13 Jun 2013 17:03:48 -0400
+From: Jake the Dog <jake@adventuretime.ooo>
+To: incoming+gitlabhq/gitlabhq+auth_token@appmail.adventuretime.ooo
+Message-ID: <CADkmRc+rNGAGGbV2iE5p918UVy4UyJqVcXRO2=otppgzduJSg@mail.gmail.com>
+Subject: New Issue by email
+Mime-Version: 1.0
+Content-Type: text/plain;
+ charset=ISO-8859-1
+Content-Transfer-Encoding: 7bit
+X-Sieve: CMU Sieve 2.2
+X-Received: by 10.0.0.1 with SMTP id n7mr11234144ipb.85.1371157428600; Thu,
+ 13 Jun 2013 14:03:48 -0700 (PDT)
+X-Scanned-By: MIMEDefang 2.69 on IPv6:2001:470:1d:165::1
+
+The reply by email functionality should be extended to allow creating a new issue by email.
+even when the email is forwarded to the project which may include lines that begin with ">"
+
+there should be a quote below this line:
+
+> this is a quote
\ No newline at end of file

spec/lib/gitlab/email/handler/create_issue_handler_spec.rb

@@ -46,6 +46,20 @@ describe Gitlab::Email::Handler::CreateIssueHandler do
         expect(issue.description).to eq('')
       end
     end
+
+    context "when there are quotes in email" do
+      let(:email_raw) { fixture_file("emails/valid_new_issue_with_quote.eml") }
+
+      it "creates a new issue" do
+        expect { receiver.execute }.to change { project.issues.count }.by(1)
+        issue = project.issues.last
+
+        expect(issue.author).to eq(user)
+        expect(issue.title).to eq('New Issue by email')
+        expect(issue.description).to include('reply by email')
+        expect(issue.description).to include('> this is a quote')
+      end
+    end
   end
 
   context "something is wrong" do

spec/lib/gitlab/email/reply_parser_spec.rb

@@ -3,8 +3,8 @@ require "spec_helper"
 # Inspired in great part by Discourse's Email::Receiver
 describe Gitlab::Email::ReplyParser do
   describe '#execute' do
-    def test_parse_body(mail_string)
-      described_class.new(Mail::Message.new(mail_string)).execute
+    def test_parse_body(mail_string, params = {})
+      described_class.new(Mail::Message.new(mail_string), params).execute
     end
 
     it "returns an empty string if the message is blank" do
@@ -212,5 +212,19 @@ describe Gitlab::Email::ReplyParser do
     it "does not wrap links with no href in unnecessary brackets" do
       expect(test_parse_body(fixture_file("emails/html_empty_link.eml"))).to eq("no brackets!")
     end
+
+    it "does not trim reply if trim_reply option is false" do
+      expect(test_parse_body(fixture_file("emails/valid_new_issue_with_quote.eml"), { trim_reply: false }))
+        .to eq(
+          <<-BODY.strip_heredoc.chomp
+          The reply by email functionality should be extended to allow creating a new issue by email.
+          even when the email is forwarded to the project which may include lines that begin with ">"
+
+          there should be a quote below this line:
+
+          > this is a quote
+          BODY
+        )
+    end
   end
 end