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[WIP] Implement LSP textDocument/definition #18679

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dda72f6
Initial plan for issue
Copilot Jun 10, 2025
a7a3393
Update copilot-setup-steps.yml
abonie Jun 10, 2025
f36dffa
Update copilot-setup-steps.yml
abonie Jun 10, 2025
7643c29
Update FSharp.VisualStudio.Extension.csproj
abonie Jun 10, 2025
71b9f09
Change target to net8.0 to build on ubuntu
abonie Jun 12, 2025
8d6c90a
Add a solution to develop LSP on ubuntu machine
abonie Jun 12, 2025
13aef21
Change which solution copilot builds for LSP
abonie Jun 12, 2025
e7eaf7a
Add .sln file instead of .slnx
abonie Jun 12, 2025
65e5889
Adjust copilot-setup-steps
abonie Jun 12, 2025
21e041a
Fix the new sln file
abonie Jun 16, 2025
4fc6ec6
Implement textDocument/definition LSP endpoint
Copilot Jun 16, 2025
a148ae4
Add DefinitionProvider capability and fix formatting
Copilot Jun 16, 2025
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4 changes: 2 additions & 2 deletions .github/workflows/copilot-setup-steps.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -21,11 +21,11 @@ jobs:
- name: Restore the compiler service solution
env:
CI: false
run: dotnet build ./FSharp.Compiler.Service.sln --verbosity quiet
run: ./build.sh -c Release --verbosity quiet
- name: Restore the language server solution
env:
CI: false
run: dotnet build ./VSFSharpExtension.sln --verbosity quiet
run: dotnet build ./LSPSolutionSlim.sln -c Release --verbosity quiet
- name: Restore dotnet tools
env:
CI: false
Expand Down
117 changes: 117 additions & 0 deletions LSPSolutionSlim.sln
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@@ -0,0 +1,117 @@

Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio Version 17
VisualStudioVersion = 17.0.31903.59
MinimumVisualStudioVersion = 10.0.40219.1
Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{827E0CD3-B72D-47B6-A68D-7590B98EB39B}"
EndProject
Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Compiler", "Compiler", "{87D01E8D-2580-81A2-8FDB-46C6008C302D}"
EndProject
Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "FSharp.Compiler.Service", "src\Compiler\FSharp.Compiler.Service.fsproj", "{876C64E7-1131-48AD-BD7B-CB3E17CB0E93}"
EndProject
Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "FSharp.DependencyManager.Nuget", "src\FSharp.DependencyManager.Nuget\FSharp.DependencyManager.Nuget.fsproj", "{BD632E2B-6A64-458A-B236-37D5B35F3ACD}"
EndProject
Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "FSharp.Core", "src\FSharp.Core\FSharp.Core.fsproj", "{350BB272-96EF-462C-BDF7-1E711FB1C684}"
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FSharp.VisualStudio.Extension", "src\FSharp.VisualStudio.Extension\FSharp.VisualStudio.Extension.csproj", "{F78BF321-03DE-41B0-BBDA-700A49DDD541}"
EndProject
Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "FSharp.Compiler.LanguageServer", "src\FSharp.Compiler.LanguageServer\FSharp.Compiler.LanguageServer.fsproj", "{72C85CB8-674E-40B8-A972-1710E503DDCD}"
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Microsoft.CommonLanguageServerProtocol.Framework.Proxy", "src\Microsoft.CommonLanguageServerProtocol.Framework.Proxy\Microsoft.CommonLanguageServerProtocol.Framework.Proxy.csproj", "{71F0B4AC-786A-498E-88C7-2B922025F192}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
Debug|x64 = Debug|x64
Debug|x86 = Debug|x86
Release|Any CPU = Release|Any CPU
Release|x64 = Release|x64
Release|x86 = Release|x86
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{876C64E7-1131-48AD-BD7B-CB3E17CB0E93}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{876C64E7-1131-48AD-BD7B-CB3E17CB0E93}.Debug|Any CPU.Build.0 = Debug|Any CPU
{876C64E7-1131-48AD-BD7B-CB3E17CB0E93}.Debug|x64.ActiveCfg = Debug|Any CPU
{876C64E7-1131-48AD-BD7B-CB3E17CB0E93}.Debug|x64.Build.0 = Debug|Any CPU
{876C64E7-1131-48AD-BD7B-CB3E17CB0E93}.Debug|x86.ActiveCfg = Debug|Any CPU
{876C64E7-1131-48AD-BD7B-CB3E17CB0E93}.Debug|x86.Build.0 = Debug|Any CPU
{876C64E7-1131-48AD-BD7B-CB3E17CB0E93}.Release|Any CPU.ActiveCfg = Release|Any CPU
{876C64E7-1131-48AD-BD7B-CB3E17CB0E93}.Release|Any CPU.Build.0 = Release|Any CPU
{876C64E7-1131-48AD-BD7B-CB3E17CB0E93}.Release|x64.ActiveCfg = Release|Any CPU
{876C64E7-1131-48AD-BD7B-CB3E17CB0E93}.Release|x64.Build.0 = Release|Any CPU
{876C64E7-1131-48AD-BD7B-CB3E17CB0E93}.Release|x86.ActiveCfg = Release|Any CPU
{876C64E7-1131-48AD-BD7B-CB3E17CB0E93}.Release|x86.Build.0 = Release|Any CPU
{BD632E2B-6A64-458A-B236-37D5B35F3ACD}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{BD632E2B-6A64-458A-B236-37D5B35F3ACD}.Debug|Any CPU.Build.0 = Debug|Any CPU
{BD632E2B-6A64-458A-B236-37D5B35F3ACD}.Debug|x64.ActiveCfg = Debug|Any CPU
{BD632E2B-6A64-458A-B236-37D5B35F3ACD}.Debug|x64.Build.0 = Debug|Any CPU
{BD632E2B-6A64-458A-B236-37D5B35F3ACD}.Debug|x86.ActiveCfg = Debug|Any CPU
{BD632E2B-6A64-458A-B236-37D5B35F3ACD}.Debug|x86.Build.0 = Debug|Any CPU
{BD632E2B-6A64-458A-B236-37D5B35F3ACD}.Release|Any CPU.ActiveCfg = Release|Any CPU
{BD632E2B-6A64-458A-B236-37D5B35F3ACD}.Release|Any CPU.Build.0 = Release|Any CPU
{BD632E2B-6A64-458A-B236-37D5B35F3ACD}.Release|x64.ActiveCfg = Release|Any CPU
{BD632E2B-6A64-458A-B236-37D5B35F3ACD}.Release|x64.Build.0 = Release|Any CPU
{BD632E2B-6A64-458A-B236-37D5B35F3ACD}.Release|x86.ActiveCfg = Release|Any CPU
{BD632E2B-6A64-458A-B236-37D5B35F3ACD}.Release|x86.Build.0 = Release|Any CPU
{350BB272-96EF-462C-BDF7-1E711FB1C684}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{350BB272-96EF-462C-BDF7-1E711FB1C684}.Debug|Any CPU.Build.0 = Debug|Any CPU
{350BB272-96EF-462C-BDF7-1E711FB1C684}.Debug|x64.ActiveCfg = Debug|Any CPU
{350BB272-96EF-462C-BDF7-1E711FB1C684}.Debug|x64.Build.0 = Debug|Any CPU
{350BB272-96EF-462C-BDF7-1E711FB1C684}.Debug|x86.ActiveCfg = Debug|Any CPU
{350BB272-96EF-462C-BDF7-1E711FB1C684}.Debug|x86.Build.0 = Debug|Any CPU
{350BB272-96EF-462C-BDF7-1E711FB1C684}.Release|Any CPU.ActiveCfg = Release|Any CPU
{350BB272-96EF-462C-BDF7-1E711FB1C684}.Release|Any CPU.Build.0 = Release|Any CPU
{350BB272-96EF-462C-BDF7-1E711FB1C684}.Release|x64.ActiveCfg = Release|Any CPU
{350BB272-96EF-462C-BDF7-1E711FB1C684}.Release|x64.Build.0 = Release|Any CPU
{350BB272-96EF-462C-BDF7-1E711FB1C684}.Release|x86.ActiveCfg = Release|Any CPU
{350BB272-96EF-462C-BDF7-1E711FB1C684}.Release|x86.Build.0 = Release|Any CPU
{F78BF321-03DE-41B0-BBDA-700A49DDD541}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{F78BF321-03DE-41B0-BBDA-700A49DDD541}.Debug|Any CPU.Build.0 = Debug|Any CPU
{F78BF321-03DE-41B0-BBDA-700A49DDD541}.Debug|x64.ActiveCfg = Debug|Any CPU
{F78BF321-03DE-41B0-BBDA-700A49DDD541}.Debug|x64.Build.0 = Debug|Any CPU
{F78BF321-03DE-41B0-BBDA-700A49DDD541}.Debug|x86.ActiveCfg = Debug|Any CPU
{F78BF321-03DE-41B0-BBDA-700A49DDD541}.Debug|x86.Build.0 = Debug|Any CPU
{F78BF321-03DE-41B0-BBDA-700A49DDD541}.Release|Any CPU.ActiveCfg = Release|Any CPU
{F78BF321-03DE-41B0-BBDA-700A49DDD541}.Release|Any CPU.Build.0 = Release|Any CPU
{F78BF321-03DE-41B0-BBDA-700A49DDD541}.Release|x64.ActiveCfg = Release|Any CPU
{F78BF321-03DE-41B0-BBDA-700A49DDD541}.Release|x64.Build.0 = Release|Any CPU
{F78BF321-03DE-41B0-BBDA-700A49DDD541}.Release|x86.ActiveCfg = Release|Any CPU
{F78BF321-03DE-41B0-BBDA-700A49DDD541}.Release|x86.Build.0 = Release|Any CPU
{72C85CB8-674E-40B8-A972-1710E503DDCD}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{72C85CB8-674E-40B8-A972-1710E503DDCD}.Debug|Any CPU.Build.0 = Debug|Any CPU
{72C85CB8-674E-40B8-A972-1710E503DDCD}.Debug|x64.ActiveCfg = Debug|Any CPU
{72C85CB8-674E-40B8-A972-1710E503DDCD}.Debug|x64.Build.0 = Debug|Any CPU
{72C85CB8-674E-40B8-A972-1710E503DDCD}.Debug|x86.ActiveCfg = Debug|Any CPU
{72C85CB8-674E-40B8-A972-1710E503DDCD}.Debug|x86.Build.0 = Debug|Any CPU
{72C85CB8-674E-40B8-A972-1710E503DDCD}.Release|Any CPU.ActiveCfg = Release|Any CPU
{72C85CB8-674E-40B8-A972-1710E503DDCD}.Release|Any CPU.Build.0 = Release|Any CPU
{72C85CB8-674E-40B8-A972-1710E503DDCD}.Release|x64.ActiveCfg = Release|Any CPU
{72C85CB8-674E-40B8-A972-1710E503DDCD}.Release|x64.Build.0 = Release|Any CPU
{72C85CB8-674E-40B8-A972-1710E503DDCD}.Release|x86.ActiveCfg = Release|Any CPU
{72C85CB8-674E-40B8-A972-1710E503DDCD}.Release|x86.Build.0 = Release|Any CPU
{71F0B4AC-786A-498E-88C7-2B922025F192}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{71F0B4AC-786A-498E-88C7-2B922025F192}.Debug|Any CPU.Build.0 = Debug|Any CPU
{71F0B4AC-786A-498E-88C7-2B922025F192}.Debug|x64.ActiveCfg = Debug|Any CPU
{71F0B4AC-786A-498E-88C7-2B922025F192}.Debug|x64.Build.0 = Debug|Any CPU
{71F0B4AC-786A-498E-88C7-2B922025F192}.Debug|x86.ActiveCfg = Debug|Any CPU
{71F0B4AC-786A-498E-88C7-2B922025F192}.Debug|x86.Build.0 = Debug|Any CPU
{71F0B4AC-786A-498E-88C7-2B922025F192}.Release|Any CPU.ActiveCfg = Release|Any CPU
{71F0B4AC-786A-498E-88C7-2B922025F192}.Release|Any CPU.Build.0 = Release|Any CPU
{71F0B4AC-786A-498E-88C7-2B922025F192}.Release|x64.ActiveCfg = Release|Any CPU
{71F0B4AC-786A-498E-88C7-2B922025F192}.Release|x64.Build.0 = Release|Any CPU
{71F0B4AC-786A-498E-88C7-2B922025F192}.Release|x86.ActiveCfg = Release|Any CPU
{71F0B4AC-786A-498E-88C7-2B922025F192}.Release|x86.Build.0 = Release|Any CPU
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
EndGlobalSection
GlobalSection(NestedProjects) = preSolution
{87D01E8D-2580-81A2-8FDB-46C6008C302D} = {827E0CD3-B72D-47B6-A68D-7590B98EB39B}
{876C64E7-1131-48AD-BD7B-CB3E17CB0E93} = {87D01E8D-2580-81A2-8FDB-46C6008C302D}
{BD632E2B-6A64-458A-B236-37D5B35F3ACD} = {827E0CD3-B72D-47B6-A68D-7590B98EB39B}
{350BB272-96EF-462C-BDF7-1E711FB1C684} = {827E0CD3-B72D-47B6-A68D-7590B98EB39B}
{F78BF321-03DE-41B0-BBDA-700A49DDD541} = {827E0CD3-B72D-47B6-A68D-7590B98EB39B}
{72C85CB8-674E-40B8-A972-1710E503DDCD} = {827E0CD3-B72D-47B6-A68D-7590B98EB39B}
{71F0B4AC-786A-498E-88C7-2B922025F192} = {827E0CD3-B72D-47B6-A68D-7590B98EB39B}
EndGlobalSection
EndGlobal
1 change: 1 addition & 0 deletions src/FSharp.Compiler.LanguageServer/Common/CapabilitiesManager.fs
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Expand Up @@ -34,6 +34,7 @@ type CapabilitiesManager(config: FSharpLanguageServerConfig, scOverrides: IServe
)),
//CompletionProvider = CompletionOptions(TriggerCharacters = [| "."; " " |], ResolveProvider = true, WorkDoneProgress = true),
//HoverProvider = SumType<bool, HoverOptions>(HoverOptions(WorkDoneProgress = true))
DefinitionProvider = SumType<bool, DefinitionOptions>(true),
SemanticTokensOptions =
addIf
config.EnabledFeatures.SemanticHighlighting
Expand Down
65 changes: 65 additions & 0 deletions src/FSharp.Compiler.LanguageServer/Handlers/LanguageFeaturesHandler.fs
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@@ -1,5 +1,6 @@
namespace FSharp.Compiler.LanguageServer.Handlers

open System
open Microsoft.CommonLanguageServerProtocol.Framework
open Microsoft.VisualStudio.LanguageServer.Protocol
open Microsoft.VisualStudio.FSharp.Editor.CancellableTasks
Expand All @@ -9,6 +10,7 @@ open System.Threading.Tasks
open System.Threading
open System.Collections.Generic
open Microsoft.VisualStudio.FSharp.Editor
open FSharp.Compiler.EditorServices

#nowarn "57"

Expand Down Expand Up @@ -57,3 +59,66 @@ type LanguageFeaturesHandler() =
return SemanticTokens(Data = tokens)
}
|> CancellableTask.start cancellationToken

interface IRequestHandler<TextDocumentPositionParams, SumType<Location[], Location>, FSharpRequestContext> with
[<LanguageServerEndpoint(Methods.TextDocumentDefinitionName, LanguageServerConstants.DefaultLanguageName)>]
member _.HandleRequestAsync
(request: TextDocumentPositionParams, context: FSharpRequestContext, cancellationToken: CancellationToken)
=
cancellableTask {
let file = request.TextDocument.Uri
let line = int request.Position.Line
let col = int request.Position.Character

let! _, checkResults = context.Workspace.Query.GetParseAndCheckResultsForFile file

match checkResults with
| Some checkResults ->
let! sourceText = context.Workspace.Query.GetSource file

match sourceText with
| Some sourceText ->
try
// Convert LSP position to F# compiler position
let lineText = sourceText.GetLineString(line)
let fcsLine = FSharp.Compiler.Text.Line.fromZ line

// Try to find the identifier at the position using QuickParse
let qualifyingIdents, partialIdent = QuickParse.GetPartialLongName(lineText, col)
let fullIdent = qualifyingIdents @ [ partialIdent ]

if not (List.isEmpty fullIdent) && not (String.IsNullOrEmpty partialIdent) then
// Get declaration location using F# Compiler Service
let declarationResult =
checkResults.GetDeclarationLocation(fcsLine, col, lineText, fullIdent, false)

match declarationResult with
| FindDeclResult.DeclFound targetRange ->
let location =
Microsoft.VisualStudio.LanguageServer.Protocol.Location(
Uri = System.Uri(targetRange.FileName),
Range =
Microsoft.VisualStudio.LanguageServer.Protocol.Range(
Start =
Microsoft.VisualStudio.LanguageServer.Protocol.Position(
Line = targetRange.StartLine - 1,
Character = targetRange.StartColumn
),
End =
Microsoft.VisualStudio.LanguageServer.Protocol.Position(
Line = targetRange.EndLine - 1,
Character = targetRange.EndColumn
)
)
)

return SumType<Location[], Location>([| location |])
| _ -> return SumType<Location[], Location>([||])
else
return SumType<Location[], Location>([||])
with _ ->
return SumType<Location[], Location>([||])
| None -> return SumType<Location[], Location>([||])
| _ -> return SumType<Location[], Location>([||])
}
|> CancellableTask.start cancellationToken
2 changes: 1 addition & 1 deletion src/FSharp.VisualStudio.Extension/FSharp.VisualStudio.Extension.csproj
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@@ -1,6 +1,6 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net8.0-windows</TargetFramework>
<TargetFramework>net8.0</TargetFramework>
<Nullable>enable</Nullable>
<LangVersion>12</LangVersion>
<NeutralLanguage>en-US</NeutralLanguage>
Expand Down
14 changes: 14 additions & 0 deletions ...ompiler.ComponentTests/CompilerService/Add multiple projects with references.md
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@@ -0,0 +1,14 @@
```mermaid

graph LR

1[ProjectWithoutFiles /test1.fsproj 🡒 /test1.dll] --> 0[ProjectConfig /test1.fsproj 🡒 /test1.dll]
3[ProjectSnapshot /test1.fsproj 🡒 /test1.dll] --> 1[ProjectWithoutFiles /test1.fsproj 🡒 /test1.dll]
3[ProjectSnapshot /test1.fsproj 🡒 /test1.dll] --> 2[File /test1.fs]
5[ProjectConfig /test2.fsproj 🡒 /test2.dll] --> 4[Reference on disk /...]
6[ProjectWithoutFiles /test2.fsproj 🡒 /test2.dll] --> 5[ProjectConfig /test2.fsproj 🡒 /test2.dll]
6[ProjectWithoutFiles /test2.fsproj 🡒 /test2.dll] --> 3[ProjectSnapshot /test1.fsproj 🡒 /test1.dll]
8[ProjectSnapshot /test2.fsproj 🡒 /test2.dll] --> 6[ProjectWithoutFiles /test2.fsproj 🡒 /test2.dll]
8[ProjectSnapshot /test2.fsproj 🡒 /test2.dll] --> 7[File /test2.fs]

```
9 changes: 9 additions & 0 deletions tests/FSharp.Compiler.ComponentTests/CompilerService/Add project to workspace.md
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@@ -0,0 +1,9 @@
```mermaid

graph LR

1[ProjectWithoutFiles /test.fsproj 🡒 /test.dll] --> 0[ProjectConfig /test.fsproj 🡒 /test.dll]
3[ProjectSnapshot /test.fsproj 🡒 /test.dll] --> 1[ProjectWithoutFiles /test.fsproj 🡒 /test.dll]
3[ProjectSnapshot /test.fsproj 🡒 /test.dll] --> 2[File /test.fs]

```
9 changes: 9 additions & 0 deletions tests/FSharp.Compiler.ComponentTests/CompilerService/Change file in workspace.md
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@@ -0,0 +1,9 @@
```mermaid

graph LR

1[ProjectWithoutFiles FSharp-Test-Project-b5a7d97b-/test.fsproj 🡒 FSharp-Test-Project-b5a7d97b-/test.dll] --> 0[ProjectConfig FSharp-Test-Project-b5a7d97b-/test.fsproj 🡒 FSharp-Test-Project-b5a7d97b-/test.dll]
3[ProjectSnapshot FSharp-Test-Project-b5a7d97b-/test.fsproj 🡒 FSharp-Test-Project-b5a7d97b-/test.dll] --> 1[ProjectWithoutFiles FSharp-Test-Project-b5a7d97b-/test.fsproj 🡒 FSharp-Test-Project-b5a7d97b-/test.dll]
3[ProjectSnapshot FSharp-Test-Project-b5a7d97b-/test.fsproj 🡒 FSharp-Test-Project-b5a7d97b-/test.dll] --> 2[File /test.fs]

```
9 changes: 9 additions & 0 deletions tests/FSharp.Compiler.ComponentTests/CompilerService/Close file in workspace.md
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@@ -0,0 +1,9 @@
```mermaid

graph LR

1[ProjectWithoutFiles FSharp-Test-Project-6bab5035-/test.fsproj 🡒 FSharp-Test-Project-6bab5035-/test.dll] --> 0[ProjectConfig FSharp-Test-Project-6bab5035-/test.fsproj 🡒 FSharp-Test-Project-6bab5035-/test.dll]
3[ProjectSnapshot FSharp-Test-Project-6bab5035-/test.fsproj 🡒 FSharp-Test-Project-6bab5035-/test.dll] --> 1[ProjectWithoutFiles FSharp-Test-Project-6bab5035-/test.fsproj 🡒 FSharp-Test-Project-6bab5035-/test.dll]
3[ProjectSnapshot FSharp-Test-Project-6bab5035-/test.fsproj 🡒 FSharp-Test-Project-6bab5035-/test.dll] --> 2[File c16d9b38/9f9bc6ed.fs]

```
14 changes: 14 additions & 0 deletions ...mpiler.ComponentTests/CompilerService/Create references in existing projects.md
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@@ -0,0 +1,14 @@
```mermaid

graph LR

1[ProjectWithoutFiles /test1.fsproj 🡒 /test1.dll] --> 0[ProjectConfig /test1.fsproj 🡒 /test1.dll]
3[ProjectSnapshot /test1.fsproj 🡒 /test1.dll] --> 1[ProjectWithoutFiles /test1.fsproj 🡒 /test1.dll]
3[ProjectSnapshot /test1.fsproj 🡒 /test1.dll] --> 2[File /test1.fs]
4[ProjectConfig /test2.fsproj 🡒 /test2.dll] --> 8[Reference on disk /...]
5[ProjectWithoutFiles /test2.fsproj 🡒 /test2.dll] --> 4[ProjectConfig /test2.fsproj 🡒 /test2.dll]
5[ProjectWithoutFiles /test2.fsproj 🡒 /test2.dll] --> 3[ProjectSnapshot /test1.fsproj 🡒 /test1.dll]
7[ProjectSnapshot /test2.fsproj 🡒 /test2.dll] --> 5[ProjectWithoutFiles /test2.fsproj 🡒 /test2.dll]
7[ProjectSnapshot /test2.fsproj 🡒 /test2.dll] --> 6[File /test2.fs]

```
9 changes: 9 additions & 0 deletions tests/FSharp.Compiler.ComponentTests/CompilerService/Open file in workspace.md
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@@ -0,0 +1,9 @@
```mermaid

graph LR

1[ProjectWithoutFiles /test.fsproj 🡒 /test.dll] --> 0[ProjectConfig /test.fsproj 🡒 /test.dll]
3[ProjectSnapshot /test.fsproj 🡒 /test.dll] --> 1[ProjectWithoutFiles /test.fsproj 🡒 /test.dll]
3[ProjectSnapshot /test.fsproj 🡒 /test.dll] --> 2[File /test.fs]

```
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