From 48ff579bc8afd4c100c83849157d80c181908a44 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Mon, 25 May 2026 09:29:52 +0000
Subject: [PATCH] Fix single-volume archive Volume.FileName resolution

Agent-Logs-Url: https://github.com/adamhathcock/sharpcompress/sessions/afd8cfa5-472e-4624-bb56-1412aaa04e90

Co-authored-by: adamhathcock <527620+adamhathcock@users.noreply.github.com>
---
 src/SharpCompress/Common/Volume.cs            |  5 ++-
 src/SharpCompress/packages.lock.json          | 12 +++----
 .../SharpCompress.Test/ArchiveFactoryTests.cs | 14 +++++++++
 tests/SharpCompress.Test/packages.lock.json   | 31 -------------------
 4 files changed, 24 insertions(+), 38 deletions(-)

diff --git a/src/SharpCompress/Common/Volume.cs b/src/SharpCompress/Common/Volume.cs
index ffca18c3..6ada707b 100644
--- a/src/SharpCompress/Common/Volume.cs
+++ b/src/SharpCompress/Common/Volume.cs
@@ -1,5 +1,6 @@
 using System;
 using System.IO;
+using System.Linq;
 using System.Threading.Tasks;
 using SharpCompress.IO;
 using SharpCompress.Readers;
@@ -42,7 +43,9 @@ public abstract partial class Volume : IVolume, IAsyncDisposable
 
     public virtual int Index { get; internal set; }
 
-    public string? FileName => (_baseStream as FileStream)?.Name;
+    public string? FileName =>
+        (_baseStream as FileStream)?.Name
+        ?? (_baseStream as SourceStream)?.Files.FirstOrDefault()?.FullName;
 
     /// <summary>
     /// RarArchive is part of a multi-part archive.
diff --git a/src/SharpCompress/packages.lock.json b/src/SharpCompress/packages.lock.json
index 965d59a8..e1e7afa5 100644
--- a/src/SharpCompress/packages.lock.json
+++ b/src/SharpCompress/packages.lock.json
@@ -286,9 +286,9 @@
     "net10.0": {
       "Microsoft.NET.ILLink.Tasks": {
         "type": "Direct",
-        "requested": "[10.0.7, )",
-        "resolved": "10.0.7",
-        "contentHash": "AA/yhzFHNtQZXLdqjzujPy25G8EWwGWsAnxOE2zYSBoT/8QHP6ketN3CToD3DFreO653ipUwnKHo22B8AlBMCw=="
+        "requested": "[10.0.8, )",
+        "resolved": "10.0.8",
+        "contentHash": "dVbSXGIFNR5nZcv2tOLoWI+a9T4jtFd77IYjuND+QVe360qWgAF7H0WtoopYhRw/+SgpGUTyrkrh+65+ClNnfw=="
       },
       "Microsoft.NETFramework.ReferenceAssemblies": {
         "type": "Direct",
@@ -388,9 +388,9 @@
     "net8.0": {
       "Microsoft.NET.ILLink.Tasks": {
         "type": "Direct",
-        "requested": "[8.0.26, )",
-        "resolved": "8.0.26",
-        "contentHash": "o7/yVssM2r9Wyln2s9edBd5ANZXqdSdBI+g7JqXkyJmXrhs2WsJp25K5yPnYrTgdKBCjKB8bg+O2oew4sgzFaA=="
+        "requested": "[8.0.27, )",
+        "resolved": "8.0.27",
+        "contentHash": "rQi9TxifHRnXP7lVRZH05DxD2/XGbJp12q0ozcbrlBlBnyyzssFTH/2vLhtKWUp2CT1qVscTrcYTFiwTyKPKRg=="
       },
       "Microsoft.NETFramework.ReferenceAssemblies": {
         "type": "Direct",
diff --git a/tests/SharpCompress.Test/ArchiveFactoryTests.cs b/tests/SharpCompress.Test/ArchiveFactoryTests.cs
index ba9acd7e..15d53cc5 100644
--- a/tests/SharpCompress.Test/ArchiveFactoryTests.cs
+++ b/tests/SharpCompress.Test/ArchiveFactoryTests.cs
@@ -112,6 +112,20 @@ public class ArchiveFactoryTests : TestBase
         );
     }
 
+    [Theory]
+    [InlineData("Zip.deflate.zip")]
+    [InlineData("Tar.noEmptyDirs.tar")]
+    [InlineData("Rar.rar")]
+    [InlineData("7Zip.nonsolid.7z")]
+    public void OpenArchive_SingleVolume_VolumeFileName_MatchesPath(string archiveName)
+    {
+        var archivePath = GetTestArchivePath(archiveName);
+        using var archive = ArchiveFactory.OpenArchive(archivePath);
+
+        var volume = Assert.Single(archive.Volumes);
+        Assert.Equal(archivePath, volume.FileName);
+    }
+
     [Theory]
     [InlineData("Zip.deflate.zip", ArchiveType.Zip)]
     [InlineData("Tar.noEmptyDirs.tar", ArchiveType.Tar)]
diff --git a/tests/SharpCompress.Test/packages.lock.json b/tests/SharpCompress.Test/packages.lock.json
index 136bb015..0b64aef1 100644
--- a/tests/SharpCompress.Test/packages.lock.json
+++ b/tests/SharpCompress.Test/packages.lock.json
@@ -315,30 +315,6 @@
         }
       }
     },
-    ".NETFramework,Version=v4.8/win-x86": {
-      "Microsoft.Win32.Registry": {
-        "type": "Transitive",
-        "resolved": "5.0.0",
-        "contentHash": "dDoKi0PnDz31yAyETfRntsLArTlVAVzUzCIvvEDsDsucrl33Dl8pIJG06ePTJTI3tGpeyHS9Cq7Foc/s4EeKcg==",
-        "dependencies": {
-          "System.Security.AccessControl": "5.0.0",
-          "System.Security.Principal.Windows": "5.0.0"
-        }
-      },
-      "System.Security.AccessControl": {
-        "type": "Transitive",
-        "resolved": "5.0.0",
-        "contentHash": "dagJ1mHZO3Ani8GH0PHpPEe/oYO+rVdbQjvjJkBRNQkX4t0r1iaeGn8+/ybkSLEan3/slM0t59SVdHzuHf2jmw==",
-        "dependencies": {
-          "System.Security.Principal.Windows": "5.0.0"
-        }
-      },
-      "System.Security.Principal.Windows": {
-        "type": "Transitive",
-        "resolved": "5.0.0",
-        "contentHash": "t0MGLukB5WAVU9bO3MGzvlGnyJPgUlcwerXn1kzBRjwLKixT96XV0Uza41W49gVd8zEMFu9vQEFlv0IOrytICA=="
-      }
-    },
     "net10.0": {
       "AwesomeAssertions": {
         "type": "Direct",
@@ -557,13 +533,6 @@
         "resolved": "8.0.0",
         "contentHash": "3WA9q9yVqJp222P3x1wYIGDAkpjAku0TMUaaQV22g6L67AI0LdOIrVS7Ht2vJfLHGSPVuqN94vIr15qn+HEkHw=="
       }
-    },
-    "net10.0/win-x86": {
-      "Microsoft.Win32.Registry": {
-        "type": "Transitive",
-        "resolved": "5.0.0",
-        "contentHash": "dDoKi0PnDz31yAyETfRntsLArTlVAVzUzCIvvEDsDsucrl33Dl8pIJG06ePTJTI3tGpeyHS9Cq7Foc/s4EeKcg=="
-      }
     }
   }
 }
\ No newline at end of file