.

Author: SimonCropp

src/DeterministicIoPackaging/DeterministicPackage.cs

@@ -11,7 +11,8 @@ public static partial class DeterministicPackage
         new SheetPatcher(),
         new WorkbookPatcher(),
         new WorkbookRelationshipPatcher(),
-        new CorePatcher()
+        new CorePatcher(),
+        new SheetRelationshipPatcher()
     ];
 
     static Archive CreateArchive(Stream target) => new(target, ZipArchiveMode.Create, leaveOpen: true);

src/DeterministicIoPackaging/Patching/SheetRelationshipPatcher.cs

@@ -0,0 +1,15 @@
+class SheetRelationshipPatcher : IPatcher
+{
+    public bool IsMatch(Entry entry) =>
+        entry.FullName.StartsWith("xl/worksheets/_rels/") &&
+        entry.FullName.EndsWith(".xml.rels");
+
+    public void PatchXml(XDocument xml)
+    {
+        var root = xml.Root!;
+        var relationships = root.Elements()
+            .OrderBy(_ => _.Attribute("Id")!.Value)
+            .ToList();
+        root.ReplaceAll(relationships);
+    }
+}

src/Directory.Build.props

@@ -2,7 +2,7 @@
 <Project>
   <PropertyGroup>
     <NoWarn>CS1591;CS0649;CA1416;NU1608;NU1109</NoWarn>
-    <Version>0.12.0</Version>
+    <Version>0.13.0</Version>
     <LangVersion>preview</LangVersion>
     <AssemblyVersion>1.0.0</AssemblyVersion>
     <Description>Modify System.IO.Packaging (https://learn.microsoft.com/en-us/dotnet/api/system.io.packaging) files to ensure they are deterministic. Helpful for testing, build reproducibility, security verification, and ensuring package integrity across different build environments.</Description>

src/Tests/Patching/SheetRelationshipPatcherTests.Patch.DotNet.verified.xml

@@ -0,0 +1,4 @@
+<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
+  <Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink" Target="https://somesite//invitations/2be3ce9e-5921-4184-b9c0-435f8bb9805b" TargetMode="External" />
+  <Relationship Id="rId2" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink" Target="https://somesite//invitations/24a64e93-7752-4caa-be5d-66b6a0d513e2" TargetMode="External" />
+</Relationships>

src/Tests/Patching/SheetRelationshipPatcherTests.Patch.Net.verified.xml

@@ -0,0 +1,4 @@
+<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
+  <Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink" Target="https://somesite//invitations/2be3ce9e-5921-4184-b9c0-435f8bb9805b" TargetMode="External" />
+  <Relationship Id="rId2" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink" Target="https://somesite//invitations/24a64e93-7752-4caa-be5d-66b6a0d513e2" TargetMode="External" />
+</Relationships>

src/Tests/Patching/SheetRelationshipPatcherTests.cs

@@ -0,0 +1,27 @@
+[TestFixture]
+public class SheetRelationshipPatcherTests
+{
+    [Test]
+    public Task Patch()
+    {
+        var xml =
+            """
+            <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+            <Relationships
+              xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
+              <Relationship
+                Id="rId2"
+                Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink"
+                Target="https://somesite//invitations/24a64e93-7752-4caa-be5d-66b6a0d513e2"
+                TargetMode="External" />
+              <Relationship
+                Id="rId1"
+                Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink"
+                Target="https://somesite//invitations/2be3ce9e-5921-4184-b9c0-435f8bb9805b"
+                TargetMode="External" />
+            </Relationships>
+            """;
+        var document = PatchHelper.Patch<SheetRelationshipPatcher>(xml);
+        return Verify(document);
+    }
+}