Merge pull request #13 from Cysharp/hotfix/FixRemovedProject

Fix an error when a nested project was removed.

Author: mayuki

src/Editor/SlnMerge.cs

@@ -541,6 +541,12 @@ private static Dictionary<string, SolutionTreeNode> BuildSolutionFlatTree(Soluti
 
                     if (!projectsByGuid.ContainsKey(projectGuid))
                     {
+                        // Project has been removed from the base solution.
+                        if (!solutionFile.Projects.ContainsKey(projectGuid))
+                        {
+                            continue;
+                        }
+
                         projectsByGuid[projectGuid] = new SolutionTreeNode(solutionFile.Projects[projectGuid]);
                     }
 

src/package.json

@@ -2,7 +2,7 @@
     "name": "com.cysharp.slnmerge",
     "displayName": "SlnMerge",
     "author": { "name": "Cysharp, Inc.", "url": "https://cysharp.co.jp/en/" },
-    "version": "1.2.0",
+    "version": "1.2.1",
     "unity": "2018.4",
     "description": "SlnMerge merges the solution files when generating solution file by Unity Editor.",
     "keywords": ["Visual Studio", "sln", "IDE", "solution"],

test/SlnMerge.Tests/SlnMergeTest.cs

@@ -446,6 +446,58 @@ public void Merge_SolutionFolder_ExistedFolder_SectionExists()
 ".Trim().ReplacePathSeparators(), content.Trim());
         }
 
+        [Fact]
+        public void Merge_SolutionFolder_ProjectHasBeenRemovedFromBaseSolution()
+        {
+            var baseSln = SolutionFile.Parse(@"C:\Path\To\Nantoka\Nantoka.Unity\Nantoka.Unity.sln".ToCurrentPlatformPathForm(), @"
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 16
+Project(""{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}"") = ""Assembly-CSharp"", ""Assembly-CSharp.csproj"", ""{1E7138DC-D3E2-51A8-4059-67524470B2E7}""
+EndProject
+Global
+	GlobalSection(NestedProjects) = preSolution
+		{1E7138DC-D3E2-51A8-4059-67524470B2E7} = {F95BC0CF-E609-419F-B0A0-019BD5783670}
+		{1E7138DC-D3E2-51A8-4059-67524470B2E8} = {F95BC0CF-E609-419F-B0A0-019BD5783670}
+	EndGlobalSection
+EndGlobal
+".Trim());
+            var overlaySln = SolutionFile.Parse(@"C:\Path\To\Nantoka\Nantoka.Unity\Nantoka.Server.sln".ToCurrentPlatformPathForm(), @"
+Microsoft Visual Studio Solution File, Format Version 12.00
+Project(""{2150E333-8FDC-42A3-9474-1A3956D46DE8}"") = ""Folder1"", ""Folder1"", ""{F95BC0CF-E609-419F-B0A0-019BD5783670}""
+EndProject
+Global
+EndGlobal
+".Trim());
+
+            // Merge without errors. NestedProject of removed projects remain in a merged solution.
+            var mergedSolutionFile = SlnMerge.Merge(
+                baseSln,
+                overlaySln,
+                new SlnMergeSettings()
+                {
+                    NestedProjects = new[]
+                    {
+                        new SlnMergeSettings.NestedProject() { FolderPath = "Folder1", ProjectName = "Assembly-CSharp" },
+                    }
+                },
+                SlnMergeNullLogger.Instance);
+            var content = mergedSolutionFile.ToFileContent();
+            Assert.Equal(@"
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 16
+Project(""{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}"") = ""Assembly-CSharp"", ""Assembly-CSharp.csproj"", ""{1E7138DC-D3E2-51A8-4059-67524470B2E7}""
+EndProject
+Project(""{2150E333-8FDC-42A3-9474-1A3956D46DE8}"") = ""Folder1"", ""Folder1"", ""{F95BC0CF-E609-419F-B0A0-019BD5783670}""
+EndProject
+Global
+	GlobalSection(NestedProjects) = preSolution
+		{1E7138DC-D3E2-51A8-4059-67524470B2E7} = {F95BC0CF-E609-419F-B0A0-019BD5783670}
+		{1E7138DC-D3E2-51A8-4059-67524470B2E8} = {F95BC0CF-E609-419F-B0A0-019BD5783670}
+	EndGlobalSection
+EndGlobal
+".Trim().ReplacePathSeparators(), content.Trim());
+        }
+
         [Fact]
         public void Merge_SolutionItems()
         {