Add file and line numbers to vuln issues

Add file and line numbers to the issues created from the
vulnerability modal in the security dashboards.

ee/app/views/vulnerabilities/issue_description.md.erb

@@ -8,6 +8,12 @@
 <% if vulnerability.confidence.present? %>
 * Confidence: <%= vulnerability.confidence %>
 <% end %>
+<% if defined?(vulnerability.file) && vulnerability.file.present?
+     location_text = [vulnerability.file, vulnerability.line].compact.join(':')
+     location_link = [vulnerability.file, vulnerability.line].compact.join('#L')
+%>
+* Location: [<%= location_text %>](<%= location_link %>)
+<% end %>
 
 <% if vulnerability.solution.present? %>
 ### Solution:

ee/changelogs/unreleased/8157_add_line_numbers_to_vuln_issues_be.yml

+---
+title: Add file and line numbers to issues created from SAST vulnerabilities
+merge_request: 8578
+author:
+type: changed

ee/lib/gitlab/vulnerabilities/standard_vulnerability.rb

@@ -18,6 +18,14 @@ module Gitlab
       def description
         @data[:description].presence || @data[:title]
       end
+
+      def file
+        @data[:file].presence || @data[:location]&.[](:file)
+      end
+
+      def line
+        @data[:line].presence || @data[:location]&.[](:start_line)
+      end
     end
   end
 end

ee/spec/services/ee/issues/create_from_vulnerability_data_service_spec.rb

@@ -32,6 +32,7 @@ describe Issues::CreateFromVulnerabilityDataService, '#execute' do
             severity: 'Low', confidence: 'High',
             solution: 'Please do something!',
             file: 'subdir/src/main/java/com/gitlab/security_products/tests/App.java',
+            line: '15',
             cve: '818bf5dacb291e15d9e6dc3c5ac32178:PREDICTABLE_RANDOM',
             title: 'Predictable pseudorandom number generator',
             description: 'Description of Predictable pseudorandom number generator',
@@ -69,6 +70,7 @@ describe Issues::CreateFromVulnerabilityDataService, '#execute' do
 
             * Severity: Low
             * Confidence: High
+            * Location: [subdir/src/main/java/com/gitlab/security_products/tests/App.java:15](subdir/src/main/java/com/gitlab/security_products/tests/App.java#L15)
 
             ### Solution:
 
@@ -97,6 +99,7 @@ describe Issues::CreateFromVulnerabilityDataService, '#execute' do
             severity: 'Low', confidence: 'High',
             solution: 'Please do something!',
             file: 'subdir/src/main/java/com/gitlab/security_products/tests/App.java',
+            line: '15',
             cve: '818bf5dacb291e15d9e6dc3c5ac32178:PREDICTABLE_RANDOM',
             title: 'Predictable pseudorandom number generator',
             tool: 'find_sec_bugs'
@@ -111,6 +114,7 @@ describe Issues::CreateFromVulnerabilityDataService, '#execute' do
 
             * Severity: Low
             * Confidence: High
+            * Location: [subdir/src/main/java/com/gitlab/security_products/tests/App.java:15](subdir/src/main/java/com/gitlab/security_products/tests/App.java#L15)
 
             ### Solution:
 
@@ -130,6 +134,7 @@ describe Issues::CreateFromVulnerabilityDataService, '#execute' do
             severity: 'Low', confidence: 'High',
             solution: 'Please do something!',
             file: 'subdir/src/main/java/com/gitlab/security_products/tests/App.java',
+            line: '15',
             cve: '818bf5dacb291e15d9e6dc3c5ac32178:PREDICTABLE_RANDOM',
             title: 'Predictable pseudorandom number generator',
             description: 'Description of Predictable pseudorandom number generator',
@@ -166,6 +171,7 @@ describe Issues::CreateFromVulnerabilityDataService, '#execute' do
 
             * Severity: Low
             * Confidence: High
+            * Location: [subdir/src/main/java/com/gitlab/security_products/tests/App.java:15](subdir/src/main/java/com/gitlab/security_products/tests/App.java#L15)
 
             ### Solution:
 
@@ -209,6 +215,7 @@ describe Issues::CreateFromVulnerabilityDataService, '#execute' do
 
             * Severity: Low
             * Confidence: High
+            * Location: [subdir/src/main/java/com/gitlab/security_products/tests/App.java:41](subdir/src/main/java/com/gitlab/security_products/tests/App.java#L41)
 
             ### Solution: