enumerate diff lines in patch changeset.

Author: igadmg

LibGit2Sharp/ContentChangeLine.cs

@@ -0,0 +1,18 @@
+using LibGit2Sharp.Core;
+
+namespace LibGit2Sharp
+{
+    public class ContentChangeLine
+    {
+        public int OldLineNo;
+        public int NewLineNo;
+        public int NumLines;
+
+        internal ContentChangeLine(GitDiffLine line)
+        {
+            OldLineNo = line.OldLineNo;
+            NewLineNo = line.NewLineNo;
+            NumLines = line.NumLines;
+        }
+    }
+}

LibGit2Sharp/ContentChanges.cs

@@ -1,4 +1,6 @@
 using System;
+using System.Collections;
+using System.Collections.Generic;
 using System.Diagnostics;
 using System.Globalization;
 using System.Text;
@@ -10,9 +12,10 @@ namespace LibGit2Sharp
     /// Holds the changes between two <see cref="Blob"/>s.
     /// </summary>
     [DebuggerDisplay("{DebuggerDisplay,nq}")]
-    public class ContentChanges
+    public class ContentChanges : IEnumerable<ContentChangeLine>
     {
         private readonly StringBuilder patchBuilder = new StringBuilder();
+        private readonly List<ContentChangeLine> lines = new List<ContentChangeLine>();
 
         /// <summary>
         /// Needed for mocking purposes.
@@ -95,15 +98,7 @@ private unsafe int LineCallback(git_diff_delta* delta, GitDiffHunk hunk, GitDiff
             switch (line.lineOrigin)
             {
                 case GitDiffLineOrigin.GIT_DIFF_LINE_ADDITION:
-                    LinesAdded++;
-                    prefix = Encoding.ASCII.GetString(new[] { (byte)line.lineOrigin });
-                    break;
-
                 case GitDiffLineOrigin.GIT_DIFF_LINE_DELETION:
-                    LinesDeleted++;
-                    prefix = Encoding.ASCII.GetString(new[] { (byte)line.lineOrigin });
-                    break;
-
                 case GitDiffLineOrigin.GIT_DIFF_LINE_CONTEXT:
                     prefix = Encoding.ASCII.GetString(new[] { (byte)line.lineOrigin });
                     break;
@@ -113,11 +108,38 @@ private unsafe int LineCallback(git_diff_delta* delta, GitDiffHunk hunk, GitDiff
                     break;
             }
 
+            AppendGitDiffLine(line);
             AppendToPatch(prefix);
             AppendToPatch(decodedContent);
             return 0;
         }
 
+        internal void AppendGitDiffLine(GitDiffLine line)
+        {
+            switch (line.lineOrigin)
+            {
+                case GitDiffLineOrigin.GIT_DIFF_LINE_ADDITION:
+                    LinesAdded++;
+                    lines.Add(new ContentChangeLine(line));
+                    break;
+
+                case GitDiffLineOrigin.GIT_DIFF_LINE_DELETION:
+                    LinesDeleted++;
+                    lines.Add(new ContentChangeLine(line));
+                    break;
+            }
+        }
+
+        public IEnumerator<ContentChangeLine> GetEnumerator()
+        {
+            return lines.GetEnumerator();
+        }
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return lines.GetEnumerator();
+        }
+
         private string DebuggerDisplay
         {
             get

LibGit2Sharp/LibGit2Sharp.csproj

@@ -32,7 +32,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="LibGit2Sharp.NativeBinaries" Version="[2.0.305]" PrivateAssets="none" />
+    <PackageReference Include="LibGit2Sharp.NativeBinaries" Version="2.0.306" PrivateAssets="none" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="all" />
     <PackageReference Include="Nerdbank.GitVersioning" Version="3.0.50" PrivateAssets="all" />
   </ItemGroup>

LibGit2Sharp/Patch.cs

@@ -76,17 +76,17 @@ private unsafe int PrintCallBack(git_diff_delta* delta, GitDiffHunk hunk, GitDif
 
                 case GitDiffLineOrigin.GIT_DIFF_LINE_ADDITION:
                     linesAdded++;
-                    currentChange.LinesAdded++;
                     prefix = "+";
                     break;
 
                 case GitDiffLineOrigin.GIT_DIFF_LINE_DELETION:
                     linesDeleted++;
-                    currentChange.LinesDeleted++;
                     prefix = "-";
                     break;
             }
 
+            currentChange.AppendGitDiffLine(line);
+
             string formattedOutput = string.Concat(prefix, patchPart);
 
             fullPatchBuilder.Append(formattedOutput);