Use buildDir variable

Author: forki

build.fsx

@@ -37,6 +37,8 @@ let netFrameworks = ["v4.0"; "v4.5"]
 // The rest of the code is standard F# build script 
 // --------------------------------------------------------------------------------------
 
+let buildDir = "bin"
+
 // Read release notes & version info from RELEASE_NOTES.md
 let release = LoadReleaseNotes (__SOURCE_DIRECTORY__ + "/RELEASE_NOTES.md")
 let isAppVeyorBuild = buildServer = BuildServer.AppVeyor
@@ -66,7 +68,7 @@ Target "AssemblyInfo" (fun _ ->
 // Clean build results & restore NuGet packages
 
 Target "Clean" (fun _ ->
-    CleanDirs ["bin" ]
+    CleanDirs [ buildDir ]
 )
 
 Target "CleanDocs" (fun _ ->
@@ -79,7 +81,7 @@ Target "CleanDocs" (fun _ ->
 Target "GenerateFSIStrings" (fun _ -> 
     // Generate FSIStrings using the FSSrGen tool
     execProcess (fun p -> 
-      let dir = __SOURCE_DIRECTORY__ @@ "src/fsharp/fsi"
+      let dir = __SOURCE_DIRECTORY__ </> "src/fsharp/fsi"
       p.Arguments <- "FSIstrings.txt FSIstrings.fs FSIstrings.resx"
       p.WorkingDirectory <- dir
       p.FileName <- !! "lib/bootstrap/4.0/fssrgen.exe" |> Seq.head ) TimeSpan.MaxValue
@@ -89,7 +91,7 @@ Target "GenerateFSIStrings" (fun _ ->
 Target "Build" (fun _ ->
     netFrameworks
     |> List.iter (fun framework -> 
-        let outputPath = "bin/" + framework
+        let outputPath = buildDir </> framework
         !! (project + ".sln")
         |> MSBuild outputPath "Build" ["Configuration","Release"; "TargetFrameworkVersion", framework]
         |> Log (".NET " + framework + " Build-Output: "))
@@ -101,7 +103,7 @@ Target "SourceLink" (fun _ ->
     #else
     netFrameworks
     |> List.iter (fun framework -> 
-        let outputPath = __SOURCE_DIRECTORY__ @@ "bin/" + framework
+        let outputPath = __SOURCE_DIRECTORY__ </> buildDir </> framework
         let proj = VsProj.Load "src/fsharp/FSharp.Compiler.Service/FSharp.Compiler.Service.fsproj"
                         ["Configuration","Release"; "TargetFrameworkVersion",framework; "OutputPath",outputPath]
         let sourceFiles = 
@@ -138,15 +140,15 @@ Target "RunTests" (fun _ ->
 
 Target "NuGet" (fun _ ->
     NuGet (fun p -> 
-        { p with   
+        { p with 
             Authors = authors
             Project = project
             Summary = summary
             Description = description
             Version = buildVersion
             ReleaseNotes = release.Notes |> toLines
             Tags = tags
-            OutputPath = "bin"
+            OutputPath = buildDir
             AccessKey = getBuildParamOrDefault "nugetkey" ""
             Publish = hasBuildParam "nugetkey" })
         ("nuget/" + project + ".nuspec")