don't emit empty assembly references to package resolution file (dotn…

…et#10206)

src/fsharp/FSharp.Compiler.Service/FSharp.Compiler.Service.fsproj

@@ -175,6 +175,9 @@
     <Compile Include="..\..\utils\PathMap.fs">
       <Link>Utilities\PathMap.fs</Link>
     </Compile>
+    <Compile Include="..\..\utils\RidHelpers.fs">
+      <Link>Utilities\RidHelpers.fs</Link>
+    </Compile>
     <Compile Include="..\range.fsi">
       <Link>ErrorLogging\range.fsi</Link>
     </Compile>

src/fsharp/FSharp.DependencyManager.Nuget/FSharp.DependencyManager.ProjectFile.fs

@@ -210,11 +210,11 @@ $(PACKAGEREFERENCES)
     <ItemGroup>
       <ResolvedReferenceLines Remove='*' />
       <ResolvedReferenceLines
-          Condition=" ('%(InteractiveResolvedFile.NugetPackageId)'!='FSharp.Core') or ('$(SCRIPTEXTENSION)'!='.fsx' and '%(InteractiveResolvedFile.NugetPackageId)'=='FSharp.Core')"
+          Condition="(@(InteractiveResolvedFile->Count()) &gt; 0) AND (('%(InteractiveResolvedFile.NugetPackageId)'!='FSharp.Core') or ('$(SCRIPTEXTENSION)'!='.fsx' and '%(InteractiveResolvedFile.NugetPackageId)'=='FSharp.Core'))"
           Include='%(InteractiveResolvedFile.NugetPackageId),%(InteractiveResolvedFile.NugetPackageVersion),%(InteractiveResolvedFile.PackageRoot),%(InteractiveResolvedFile.FullPath),%(InteractiveResolvedFile.AssetType),%(InteractiveResolvedFile.IsNotImplementationReference),%(InteractiveResolvedFile.InitializeSourcePath),'
           KeepDuplicates="false" />
       <ResolvedReferenceLines
-          Condition="('%(NativeIncludeRoots.NugetPackageId)'!='FSharp.Core') or ('$(SCRIPTEXTENSION)'!='.fsx' and '%(NativeIncludeRoots.NugetPackageId)'=='FSharp.Core')"
+          Condition="(@(NativeIncludeRoots->Count()) &gt; 0) AND (('%(NativeIncludeRoots.NugetPackageId)'!='FSharp.Core') or ('$(SCRIPTEXTENSION)'!='.fsx' and '%(NativeIncludeRoots.NugetPackageId)'=='FSharp.Core'))"
           Include='%(NativeIncludeRoots.NugetPackageId),%(NativeIncludeRoots.NugetPackageVersion),%(NativeIncludeRoots.PackageRoot),,%(NativeIncludeRoots.AssetType),,,%(NativeIncludeRoots.Path)'
           KeepDuplicates="false" />
     </ItemGroup>

src/fsharp/FSharp.DependencyManager.Nuget/FSharp.DependencyManager.Utilities.fs

@@ -9,6 +9,14 @@ open System.Reflection
 [<AttributeUsage(AttributeTargets.Assembly ||| AttributeTargets.Class , AllowMultiple = false)>]
 type DependencyManagerAttribute() = inherit System.Attribute()
 
+/// The result of building the package resolution files.
+type PackageBuildResolutionResult =
+    { success: bool
+      projectPath: string
+      stdOut: string array
+      stdErr: string array
+      resolutionsFile: string option }
+
 module internal Utilities =
 
     /// Return a string array delimited by commas
@@ -202,7 +210,7 @@ module internal Utilities =
 
         let workingDir = Path.GetDirectoryName projectPath
 
-        let succeeded, stdOut, stdErr =
+        let success, stdOut, stdErr =
             if not (isRunningOnCoreClr) then
                 // The Desktop build uses "msbuild" to build
                 executeBuild msbuildExePath (arguments "-v:quiet") workingDir
@@ -211,5 +219,9 @@ module internal Utilities =
                 executeBuild dotnetHostPath (arguments "msbuild -v:quiet") workingDir
 
         let outputFile = projectPath + ".resolvedReferences.paths"
-        let resultOutFile = if succeeded && File.Exists(outputFile) then Some outputFile else None
-        succeeded, stdOut, stdErr, resultOutFile
+        let resolutionsFile = if success && File.Exists(outputFile) then Some outputFile else None
+        { success = success
+          projectPath = projectPath
+          stdOut = stdOut
+          stdErr = stdErr
+          resolutionsFile = resolutionsFile }

src/fsharp/FSharp.DependencyManager.Nuget/FSharp.DependencyManager.fs

@@ -125,7 +125,6 @@ module FSharpDependencyManager =
         |> List.distinct
         |> (fun l -> l, binLogPath)
 
-
 /// The results of ResolveDependencies
 type ResolveDependenciesResult (success: bool, stdOut: string array, stdError: string array, resolutions: string seq, sourceFiles: string seq, roots: string seq) =
 
@@ -195,12 +194,12 @@ type FSharpDependencyManager (outputDir:string option) =
         sprintf """    #r "nuget:FSharp.Data";;                      // %s 'FSharp.Data' %s""" (SR.loadNugetPackage()) (SR.highestVersion())
         |]
 
-    member _.ResolveDependencies(scriptExt:string, packageManagerTextLines: (string *string) seq, tfm: string, rid: string) : obj =
+    member _.PrepareDependencyResolutionFiles(scriptExt: string, packageManagerTextLines: (string * string) seq, targetFrameworkMoniker: string, runtimeIdentifier: string): PackageBuildResolutionResult =
 
-        let scriptExt, poundRprefix  =
+        let scriptExt =
             match scriptExt with
-            | ".csx" -> csxExt, "#r \"" 
-            | _ -> fsxExt, "#r @\"" 
+            | ".csx" -> csxExt
+            | _ -> fsxExt
 
         let packageReferences, binLogPath =
             packageManagerTextLines
@@ -214,39 +213,50 @@ type FSharpDependencyManager (outputDir:string option) =
 
         let packageReferenceText = String.Join(Environment.NewLine, packageReferenceLines)
 
-        // Generate a project files
+        let projectPath = Path.Combine(scriptsPath, "Project.fsproj")
+
+        // Generate project files
         let generateAndBuildProjectArtifacts =
             let writeFile path body =
                 if not (generatedScripts.ContainsKey(body.GetHashCode().ToString())) then
                     emitFile path  body
 
-            let projectPath = Path.Combine(scriptsPath, "Project.fsproj")
-
             let generateProjBody =
-                generateProjectBody.Replace("$(TARGETFRAMEWORK)", tfm)
-                                   .Replace("$(RUNTIMEIDENTIFIER)", rid)
+                generateProjectBody.Replace("$(TARGETFRAMEWORK)", targetFrameworkMoniker)
+                                   .Replace("$(RUNTIMEIDENTIFIER)", runtimeIdentifier)
                                    .Replace("$(PACKAGEREFERENCES)", packageReferenceText)
                                    .Replace("$(SCRIPTEXTENSION)", scriptExt)
 
             writeFile projectPath generateProjBody
+            buildProject projectPath binLogPath
+
+        generateAndBuildProjectArtifacts
+
+    member this.ResolveDependencies(scriptExt: string, packageManagerTextLines: (string * string) seq, targetFramework: string, runtimeIdentifier: string) : obj =
+        let poundRprefix  =
+            match scriptExt with
+            | ".csx" -> "#r \""
+            | _ -> "#r @\""
+
+        let generateAndBuildProjectArtifacts =
 
-            let result, stdOut, stdErr,  resolutionsFile = buildProject projectPath binLogPath
-            match resolutionsFile with
+            let resolutionResult = this.PrepareDependencyResolutionFiles(scriptExt, packageManagerTextLines, targetFramework, runtimeIdentifier)
+            match resolutionResult.resolutionsFile with
             | Some file ->
                 let resolutions = getResolutionsFromFile file
                 let references = (findReferencesFromResolutions resolutions) |> Array.toSeq
                 let scripts =
-                    let scriptPath = projectPath + scriptExt
+                    let scriptPath = resolutionResult.projectPath + scriptExt
                     let scriptBody =  makeScriptFromReferences references poundRprefix
                     emitFile scriptPath scriptBody
                     let loads = (findLoadsFromResolutions resolutions) |> Array.toList
                     List.concat [ [scriptPath]; loads] |> List.toSeq
                 let includes = (findIncludesFromResolutions resolutions) |> Array.toSeq
 
-                ResolveDependenciesResult(result, stdOut, stdErr, references, scripts, includes)
+                ResolveDependenciesResult(resolutionResult.success, resolutionResult.stdOut, resolutionResult.stdErr, references, scripts, includes)
 
             | None ->
                 let empty = Seq.empty<string>
-                ResolveDependenciesResult(result, stdOut, stdErr, empty, empty, empty)
+                ResolveDependenciesResult(resolutionResult.success, resolutionResult.stdOut, resolutionResult.stdErr, empty, empty, empty)
 
         generateAndBuildProjectArtifacts :> obj

src/fsharp/FSharp.DependencyManager.Nuget/FSharp.DependencyManager.fsi

@@ -29,7 +29,7 @@ type ResolveDependenciesResult =
     /// The roots to package directories
     member Roots: seq<string>
 
-[<DependencyManagerAttribute>] 
+[<DependencyManagerAttribute>]
 type FSharpDependencyManager =
     new: outputDir:string option -> FSharpDependencyManager
 
@@ -39,4 +39,6 @@ type FSharpDependencyManager =
 
     member HelpMessages:string[]
 
-    member ResolveDependencies: scriptExt:string * packageManagerTextLines: (string * string) seq * tfm: string * rid: string -> obj
+    member PrepareDependencyResolutionFiles: scriptExt: string * packageManagerTextLines: (string * string) seq * targetFrameworkMoniker: string * runtimeIdentifier: string -> PackageBuildResolutionResult
+
+    member ResolveDependencies: scriptExt: string * packageManagerTextLines: (string * string) seq * targetFrameworkMoniker: string * runtimeIdentifier: string -> obj

src/fsharp/Microsoft.DotNet.DependencyManager/DependencyProvider.fs

@@ -6,6 +6,7 @@ open System
 open System.IO
 open System.Reflection
 open System.Runtime.InteropServices
+open Internal.Utilities
 open Internal.Utilities.FSharpEnvironment
 open Microsoft.FSharp.Reflection
 open System.Collections.Concurrent

src/fsharp/Microsoft.DotNet.DependencyManager/Microsoft.DotNet.DependencyManager.fsproj

@@ -23,6 +23,7 @@
   <ItemGroup>
     <EmbeddedText Include="DependencyManager.txt" />
     <EmbeddedText Include="..\..\utils\UtilsStrings.txt" />
+    <Compile Include="..\..\utils\RidHelpers.fs" />
     <Compile Include="..\..\utils\CompilerLocationUtils.fs" />
     <Compile Include="AssemblyResolveHandler.fsi" />
     <Compile Include="AssemblyResolveHandler.fs" />

src/fsharp/Microsoft.DotNet.DependencyManager/NativeDllResolveHandler.fs

@@ -3,38 +3,16 @@
 namespace Microsoft.DotNet.DependencyManager
 
 open System
-open System.Collections.Generic
 open System.IO
 open System.Reflection
 open System.Runtime.InteropServices
+open Internal.Utilities
 open Internal.Utilities.FSharpEnvironment
 
 /// Signature for Native library resolution probe callback
 /// host implements this, it's job is to return a list of package roots to probe.
 type NativeResolutionProbe = delegate of Unit -> seq<string>
 
-module internal RidHelpers =
-
-    // Computer valid dotnet-rids for this environment:
-    //      https://docs.microsoft.com/en-us/dotnet/core/rid-catalog
-    //
-    // Where rid is: win, win-x64, win-x86, osx-x64, linux-x64 etc ...
-    let probingRids, baseRid, platformRid =
-        let processArchitecture = RuntimeInformation.ProcessArchitecture
-        let baseRid =
-            if RuntimeInformation.IsOSPlatform(OSPlatform.Windows) then "win"
-            elif RuntimeInformation.IsOSPlatform(OSPlatform.OSX) then "osx"
-            else "linux"
-        let platformRid =
-            match processArchitecture with
-            | Architecture.X64 ->  baseRid + "-x64"
-            | Architecture.X86 -> baseRid + "-x86"
-            | Architecture.Arm64 -> baseRid + "-arm64"
-            | _ -> baseRid + "-arm"
-        [| "any"; baseRid; platformRid |], baseRid, platformRid
-
-open RidHelpers
-
 #if NETSTANDARD
 open System.Runtime.Loader
 
@@ -109,7 +87,7 @@ type NativeDllResolveHandlerCoreClr (_nativeProbingRoots: NativeResolutionProbe)
                         if File.Exists(path) then
                             Some path
                         else
-                            probingRids |> Seq.tryPick(fun rid -> probeForNativeLibrary root rid name)))
+                            RidHelpers.probingRids |> Seq.tryPick(fun rid -> probeForNativeLibrary root rid name)))
 
         match probe with
         | Some path -> NativeAssemblyLoadContext.NativeLoadContext.LoadNativeLibrary(path)

src/fsharp/Microsoft.DotNet.DependencyManager/NativeDllResolveHandler.fsi

@@ -3,13 +3,6 @@
 namespace Microsoft.DotNet.DependencyManager
 
 open System
-open System.Collections.Generic
-
-module internal RidHelpers =
-    val probingRids:string []
-    val baseRid:string
-    val platformRid:string
-
 
 /// Signature for Native library resolution probe callback
 /// host implements this, it's job is to return a list of package roots to probe.

src/utils/RidHelpers.fs

@@ -0,0 +1,23 @@
+namespace Internal.Utilities
+
+open System.Runtime.InteropServices
+
+module internal RidHelpers =
+
+    // Computer valid dotnet-rids for this environment:
+    //      https://docs.microsoft.com/en-us/dotnet/core/rid-catalog
+    //
+    // Where rid is: win, win-x64, win-x86, osx-x64, linux-x64 etc ...
+    let probingRids, baseRid, platformRid =
+        let processArchitecture = RuntimeInformation.ProcessArchitecture
+        let baseRid =
+            if RuntimeInformation.IsOSPlatform(OSPlatform.Windows) then "win"
+            elif RuntimeInformation.IsOSPlatform(OSPlatform.OSX) then "osx"
+            else "linux"
+        let platformRid =
+            match processArchitecture with
+            | Architecture.X64 ->  baseRid + "-x64"
+            | Architecture.X86 -> baseRid + "-x86"
+            | Architecture.Arm64 -> baseRid + "-arm64"
+            | _ -> baseRid + "-arm"
+        [| "any"; baseRid; platformRid |], baseRid, platformRid

tests/FSharp.Compiler.Private.Scripting.UnitTests/DependencyManagerInteractiveTests.fs

@@ -3,7 +3,6 @@
 namespace FSharp.Compiler.Scripting.DependencyManager.UnitTests
 
 open System
-open System.Collections.Generic
 open System.IO
 open System.Reflection
 open System.Runtime.InteropServices
@@ -13,8 +12,11 @@ open FSharp.Compiler.Interactive.Shell
 open FSharp.Compiler.Scripting
 open FSharp.Compiler.SourceCodeServices
 open FSharp.Compiler.Scripting.UnitTests
+open FSharp.DependencyManager.Nuget
 open Microsoft.DotNet.DependencyManager
 
+open Internal.Utilities
+
 open Xunit
 
 module Native =
@@ -743,3 +745,16 @@ x |> Seq.iter(fun r ->
         let opt = script.Eval(text) |> getValue
         Assert.True(sawExpectedOutput.WaitOne(TimeSpan.FromSeconds(5.0)), sprintf "Expected to see error sentinel value written\nexpected:%A\nactual:%A" expected lines)
 
+    [<Fact>]
+    member __.``Ensure resolutions file doesn't contain lines with only empty values``() =
+        use tempDir = getTempDir ()
+        let dpm = new FSharpDependencyManager(Some(tempDir.ToString()))
+        let resolutionResult = dpm.PrepareDependencyResolutionFiles(".fsx", [("r", "FParsec,Version=1.1.1")], "netcoreapp3.1", RidHelpers.platformRid)
+        let resolutionLines =
+            match resolutionResult.resolutionsFile with
+            | Some path -> File.ReadAllLines(path)
+            | None -> failwith "Expected resolutions file to be created."
+        let improperResolutionLines =
+            resolutionLines
+            |> Array.filter (fun l -> l.StartsWith(","))
+        Assert.Empty(improperResolutionLines)

tests/FSharp.Compiler.Private.Scripting.UnitTests/FSharp.Compiler.Private.Scripting.UnitTests.fsproj

@@ -12,6 +12,7 @@
 
   <ItemGroup>
     <Compile Include="ConsoleHelpers.fs" />
+    <Compile Include="$(FSharpSourcesRoot)\utils\RidHelpers.fs" />
     <Compile Include="TestHelpers.fs" />
     <Compile Include="DependencyManagerInteractiveTests.fs" />
     <Compile Include="DependencyManagerLineParserTests.fs" />

tests/FSharp.Compiler.Private.Scripting.UnitTests/TestHelpers.fs

@@ -3,6 +3,7 @@
 namespace FSharp.Compiler.Scripting.UnitTests
 
 open System
+open System.IO
 open FSharp.Compiler.Interactive.Shell
 open FSharp.Compiler.SourceCodeServices
 
@@ -17,3 +18,15 @@ module TestHelpers =
         | Error ex -> raise ex
 
     let ignoreValue = getValue >> ignore
+
+    let getTempDir () =
+        let sysTempDir = Path.GetTempPath()
+        let customTempDirName = Guid.NewGuid().ToString("D")
+        let fullDirName = Path.Combine(sysTempDir, customTempDirName)
+        let dirInfo = Directory.CreateDirectory(fullDirName)
+        { new Object() with
+            member __.ToString() = dirInfo.FullName
+          interface IDisposable with
+            member __.Dispose() =
+                dirInfo.Delete(true)
+        }