#r "paket:
nuget FSharp.Core ~> 4.6 prerelease
nuget Fake.Core.Target ~> 5 prerelease
nuget Fake.IO.FileSystem ~> 5 prerelease
nuget Fake.DotNet.MSBuild ~> 5 prerelease
nuget BlackFox.CommandLine ~> 1 prerelease //"

#load ".fake/build.fsx/intellisense.fsx"

open BlackFox.CommandLine
open Fake.Core
open Fake.Core.TargetOperators
open Fake.IO
open Fake.IO.FileSystemOperators

Target.initEnvironment()

let srcDir = __SOURCE_DIRECTORY__ </> "llvm"
let buildDir = __SOURCE_DIRECTORY__ </> "B"

let ensureBuildDirectory() =
    Directory.ensure buildDir
    use o = new System.IO.StreamWriter(buildDir </> ".BUILDDIR.TAG")
    o.WriteLine "build-dir: 19BBC6F7-3FBF-49BD-BAA4-EA60CE5A0735"
    o.WriteLine "# Excluded from backups"

Target.create "Clean" <| fun _ -> Directory.delete buildDir

Target.create "CleanConfigure" <| fun _ ->
    let cmakeCache = buildDir </> "CMakeCache.txt"
    File.delete cmakeCache

Target.create "Configure" <| fun _ ->
    ensureBuildDirectory()
    CmdLine.empty
    |> CmdLine.appendPrefix "-G" "Ninja"
    |> CmdLine.appendPrefix "-S" srcDir
    |> CmdLine.appendPrefix "-B" buildDir
    |> CmdLine.appendPrefixSeq "-D"
           [| "CMAKE_BUILD_TYPE=Release"
              "CMAKE_C_COMPILER=/usr/local/opt/llvm/bin/clang"
              "CMAKE_CXX_COMPILER=/usr/local/opt/llvm/bin/clang++"
              "CMKAE_EXPORT_COMPILE_COMMANDS=YES"
              "LLVM_TARGETS_TO_BUILD=X86"
              "LLVM_INCLUDE_EXAMPLES=OFF"
              "LLVM_INCLUDE_TESTS=OFF"
              "LLVM_INCLUDE_BENCHMARKS=OFF"
              "LLVM_OPTIMIZED_TABLEGEN=ON"
              "LLVM_ENABLE_PROJECTS=clang;lld" |]
    |> CmdLine.toArray
    |> CreateProcess.fromRawCommand "cmake"
    |> CreateProcess.ensureExitCode
    |> Proc.run
    |> ignore

Target.create "Reconfigure" ignore

"CleanConfigure" ?=> "Configure"
"CleanConfigure"

"CleanConfigure" ==> "Reconfigure"
"Configure"
"Configure" ==> "Reconfigure"

Target.create "Build" <| fun _ ->
    CmdLine.empty
    |> CmdLine.appendPrefix "--build" buildDir
    |> CmdLine.toArray
    |> CreateProcess.fromRawCommand "cmake"
    |> CreateProcess.ensureExitCode
    |> Proc.run
    |> ignore

"Clean" ?=> "Configure"
"Configure"
"Configure" ?=> "Build"

Target.create "All" ignore

"Configure" ==> "All"
"Build"
"Build" ==> "All"

Target.create "Rebuild" ignore

"Clean" ==> "Rebuild"
"Configure"
"Configure" ==> "Rebuild"
"Build"
"Build" ==> "Rebuild"

Target.runOrDefault "All"