From e2dafe2eb82d7dede92f2ad1a15e3e7edacede21 Mon Sep 17 00:00:00 2001
From: Oluwatoni Solarin-Sodara <toni.edward@outlook.com>
Date: Sun, 18 Mar 2018 13:55:12 +0100
Subject: [PATCH] add preliminary support for opencover output format

---
 .../Reporters/OpenCoverReporter.cs            | 113 ++++++++++++++++++
 .../CoverageResultTask.cs                     |  16 ++-
 src/coverlet.msbuild/coverlet.props           |   3 +-
 3 files changed, 127 insertions(+), 5 deletions(-)
 create mode 100644 src/coverlet.core/Reporters/OpenCoverReporter.cs

diff --git a/src/coverlet.core/Reporters/OpenCoverReporter.cs b/src/coverlet.core/Reporters/OpenCoverReporter.cs
new file mode 100644
index 0000000..f15a1a0
--- /dev/null
+++ b/src/coverlet.core/Reporters/OpenCoverReporter.cs
@@ -0,0 +1,113 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Xml;
+
+namespace Coverlet.Core.Reporters
+{
+    public class OpenCoverReporter : IReporter
+    {
+        public string Format(CoverageResult result)
+        {
+            XmlDocument xml = new XmlDocument();
+            XmlElement coverage = xml.CreateElement("CoverageSession");
+            coverage.AppendChild(xml.CreateElement("Summary"));
+
+            XmlElement modules = xml.CreateElement("Modules");
+
+            foreach (var mod in result.Modules)
+            {
+                XmlElement module = xml.CreateElement("Module");
+                module.SetAttribute("hash", Guid.NewGuid().ToString().ToUpper());
+
+                XmlElement path = xml.CreateElement("ModulePath");
+                path.AppendChild(xml.CreateTextNode(mod.Key));
+
+                XmlElement time = xml.CreateElement("ModuleTime");
+                time.AppendChild(xml.CreateTextNode(DateTime.UtcNow.ToString("yyyy-MM-ddThh:mm:ss")));
+
+                XmlElement name = xml.CreateElement("ModuleName");
+                name.AppendChild(xml.CreateTextNode(Path.GetFileNameWithoutExtension(mod.Key)));
+
+                module.AppendChild(path);
+                module.AppendChild(time);
+                module.AppendChild(name);
+
+                XmlElement files = xml.CreateElement("Files");
+                XmlElement classes = xml.CreateElement("Classes");
+                int i = 1;
+
+                foreach (var doc in mod.Value)
+                {
+                    XmlElement file = xml.CreateElement("File");
+                    file.SetAttribute("uid", i.ToString());
+                    file.SetAttribute("fullPath", doc.Key);
+                    files.AppendChild(file);
+
+                    foreach (var cls in doc.Value)
+                    {
+                        XmlElement @class = xml.CreateElement("Class");
+
+                        XmlElement className = xml.CreateElement("FullName");
+                        className.AppendChild(xml.CreateTextNode(cls.Key));
+
+                        @class.AppendChild(xml.CreateElement("Summary"));
+                        @class.AppendChild(className);
+
+                        XmlElement methods = xml.CreateElement("Methods");
+                        int j = 0;
+                        foreach (var meth in cls.Value)
+                        {
+                            XmlElement method = xml.CreateElement("Method");
+
+                            XmlElement methodName = xml.CreateElement("Name");
+                            methodName.AppendChild(xml.CreateTextNode(meth.Key));
+
+                            XmlElement fileRef = xml.CreateElement("FileRef");
+                            fileRef.SetAttribute("uid", i.ToString());
+
+                            method.AppendChild(xml.CreateElement("Summary"));
+                            method.AppendChild(xml.CreateElement("MetadataToken"));
+                            method.AppendChild(methodName);
+                            method.AppendChild(fileRef);
+
+                            XmlElement methodPoint = xml.CreateElement("MethodPoint");
+                            methodPoint.SetAttribute("type", "xsi", "SequencePoint");
+                            methodPoint.SetAttribute("ordinal", j.ToString());
+                            methodPoint.SetAttribute("sc", "0");
+                            methodPoint.SetAttribute("sl", meth.Value.First().Key.ToString());
+                            methodPoint.SetAttribute("ec", "1");
+                            methodPoint.SetAttribute("el", meth.Value.Last().Key.ToString());
+                            methodPoint.SetAttribute("bec", "0");
+                            methodPoint.SetAttribute("bev", "0");
+                            methodPoint.SetAttribute("fileid", i.ToString());
+
+                            method.AppendChild(xml.CreateElement("SequencePoints"));
+                            method.AppendChild(xml.CreateElement("BranchPoints"));
+                            method.AppendChild(methodPoint);
+                            methods.AppendChild(method);
+                            j++;
+                        }
+
+                        @class.AppendChild(methods);
+                        classes.AppendChild(@class);
+                    }
+                    i++;
+                }
+
+                module.AppendChild(files);
+                module.AppendChild(classes);
+                modules.AppendChild(module);
+            }
+
+            coverage.AppendChild(modules);
+            xml.AppendChild(coverage);
+
+            StringWriter writer = new StringWriter();
+            xml.Save(writer);
+
+            return writer.ToString();
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/coverlet.msbuild.tasks/CoverageResultTask.cs b/src/coverlet.msbuild.tasks/CoverageResultTask.cs
index aedb43b..b39fd39 100644
--- a/src/coverlet.msbuild.tasks/CoverageResultTask.cs
+++ b/src/coverlet.msbuild.tasks/CoverageResultTask.cs
@@ -44,10 +44,18 @@ namespace Coverlet.MSbuild.Tasks
                 Console.WriteLine($"  Generating report '{_filename}'");
 
                 IReporter reporter = default(IReporter);
-                if (_format == "lcov")
-                    reporter = new LcovReporter();
-                else
-                    reporter = new JsonReporter();
+                switch (_format)
+                {
+                    case "lcov":
+                        reporter = new LcovReporter();
+                        break;
+                    case "opencover":
+                        reporter = new OpenCoverReporter();
+                        break;
+                    default:
+                        reporter = new JsonReporter();
+                        break;
+                }
 
                 File.WriteAllText(_filename, result.Format(reporter));
 
diff --git a/src/coverlet.msbuild/coverlet.props b/src/coverlet.msbuild/coverlet.props
index 95cc172..94f5e16 100644
--- a/src/coverlet.msbuild/coverlet.props
+++ b/src/coverlet.msbuild/coverlet.props
@@ -5,7 +5,8 @@
     <CoverletOutputDirectory Condition="$(CoverletOutputDirectory) == ''">$(MSBuildProjectDirectory)</CoverletOutputDirectory>
 
     <CoverletOutputExtension Condition="$(CoverletOutputFormat) == 'lcov'">.info</CoverletOutputExtension>
-    <CoverletOutputExtension Condition="$(CoverletOutputFormat) != 'lcov'">.json</CoverletOutputExtension>
+    <CoverletOutputExtension Condition="$(CoverletOutputFormat) == 'opencover'">.xml</CoverletOutputExtension>
+    <CoverletOutputExtension Condition="$(CoverletOutputFormat) != 'lcov' and $(CoverletOutputFormat) != 'opencover'">.json</CoverletOutputExtension>
 
     <CoverletOutput>$(CoverletOutputDirectory)\coverage$(CoverletOutputExtension)</CoverletOutput>
     <CollectCoverage Condition="$(CollectCoverage) == ''">false</CollectCoverage>