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| 1 | +module internal FSharp.Compiler.ReuseTcResults |
| 2 | + |
| 3 | +open System.Collections.Generic |
| 4 | +open System.IO |
| 5 | + |
| 6 | +open FSharp.Compiler.CompilerConfig |
| 7 | +open FSharp.Compiler.Diagnostics |
| 8 | +open FSharp.Compiler.GraphChecking |
| 9 | +open FSharp.Compiler.IO |
| 10 | +open FSharp.Compiler.Syntax |
| 11 | +open FSharp.Compiler.Syntax.PrettyNaming |
| 12 | + |
| 13 | +type TcData = |
| 14 | + { |
| 15 | + CmdLine: string array |
| 16 | + Graph: string array |
| 17 | + References: string array |
| 18 | + } |
| 19 | + |
| 20 | +[<Sealed>] |
| 21 | +type CachingDriver(tcConfig: TcConfig) = |
| 22 | + |
| 23 | + let outputDir = tcConfig.outputDir |> Option.defaultValue "" |
| 24 | + let tcDataFilePath = Path.Combine(outputDir, FSharpTcDataResourceName) |
| 25 | + |
| 26 | + [<Literal>] |
| 27 | + let CmdLineHeader = "CMDLINE" |
| 28 | + |
| 29 | + [<Literal>] |
| 30 | + let GraphHeader = "GRAPH" |
| 31 | + |
| 32 | + [<Literal>] |
| 33 | + let ReferencesHeader = "REFERENCES" |
| 34 | + |
| 35 | + let writeThisTcData (tcData: TcData) = |
| 36 | + use tcDataFile = FileSystem.OpenFileForWriteShim tcDataFilePath |
| 37 | + |
| 38 | + let lines = ResizeArray<string>() |
| 39 | + lines.Add $"BEGIN {CmdLineHeader}" |
| 40 | + lines.AddRange tcData.CmdLine |
| 41 | + lines.Add $"BEGIN {GraphHeader}" |
| 42 | + lines.AddRange tcData.Graph |
| 43 | + lines.Add $"BEGIN {ReferencesHeader}" |
| 44 | + lines.AddRange tcData.References |
| 45 | + |
| 46 | + tcDataFile.WriteAllLines lines |
| 47 | + |
| 48 | + let readPrevTcData () = |
| 49 | + if FileSystem.FileExistsShim tcDataFilePath then |
| 50 | + use tcDataFile = FileSystem.OpenFileForReadShim tcDataFilePath |
| 51 | + |
| 52 | + let cmdLine = ResizeArray<string>() |
| 53 | + let graph = ResizeArray<string>() |
| 54 | + let refs = ResizeArray<string>() |
| 55 | + |
| 56 | + let mutable currentHeader = "" |
| 57 | + |
| 58 | + tcDataFile.ReadLines() |
| 59 | + |> Seq.iter (fun line -> |
| 60 | + match line with |
| 61 | + | line when line.StartsWith "BEGIN" -> currentHeader <- line.Split ' ' |> Array.last |
| 62 | + | line -> |
| 63 | + match currentHeader with |
| 64 | + | CmdLineHeader -> cmdLine.Add line |
| 65 | + | GraphHeader -> graph.Add line |
| 66 | + | ReferencesHeader -> refs.Add line |
| 67 | + | _ -> invalidOp "broken tc cache") |
| 68 | + |
| 69 | + Some |
| 70 | + { |
| 71 | + CmdLine = cmdLine.ToArray() |
| 72 | + Graph = graph.ToArray() |
| 73 | + References = refs.ToArray() |
| 74 | + } |
| 75 | + |
| 76 | + else |
| 77 | + None |
| 78 | + |
| 79 | + let formatAssemblyReference (r: AssemblyReference) = |
| 80 | + let fileName = r.Text |
| 81 | + let lastWriteTime = FileSystem.GetLastWriteTimeShim fileName |
| 82 | + sprintf "%s,%i" fileName lastWriteTime.Ticks |
| 83 | + |
| 84 | + let getThisCompilationCmdLine args = args |
| 85 | + |
| 86 | + // maybe split into two things? |
| 87 | + let getThisCompilationGraph inputs = |
| 88 | + let sourceFiles = |
| 89 | + inputs |
| 90 | + |> Seq.toArray |
| 91 | + |> Array.mapi (fun idx (input: ParsedInput) -> |
| 92 | + { |
| 93 | + Idx = idx |
| 94 | + FileName = input.FileName |
| 95 | + ParsedInput = input |
| 96 | + }) |
| 97 | + |
| 98 | + let filePairs = FilePairMap sourceFiles |
| 99 | + let graph, _ = DependencyResolution.mkGraph filePairs sourceFiles |
| 100 | + |
| 101 | + let list = List<string>() |
| 102 | + |
| 103 | + for KeyValue(idx, _) in graph do |
| 104 | + let fileName = sourceFiles[idx].FileName |
| 105 | + let lastWriteTime = FileSystem.GetLastWriteTimeShim fileName |
| 106 | + list.Add(sprintf "%i,%s,%i" idx fileName lastWriteTime.Ticks) |
| 107 | + |
| 108 | + for KeyValue(idx, deps) in graph do |
| 109 | + for depIdx in deps do |
| 110 | + list.Add $"%i{idx} --> %i{depIdx}" |
| 111 | + |
| 112 | + list.ToArray() |
| 113 | + |
| 114 | + let getThisCompilationReferences = Seq.map formatAssemblyReference >> Seq.toArray |
| 115 | + |
| 116 | + member _.TryReuseTcResults inputs = |
| 117 | + let prevTcDataOpt = readPrevTcData () |
| 118 | + |
| 119 | + let thisTcData = |
| 120 | + { |
| 121 | + CmdLine = getThisCompilationCmdLine tcConfig.cmdLineArgs |
| 122 | + Graph = getThisCompilationGraph inputs |
| 123 | + References = getThisCompilationReferences tcConfig.referencedDLLs |
| 124 | + } |
| 125 | + |
| 126 | + match prevTcDataOpt with |
| 127 | + | Some prevTcData -> |
| 128 | + use _ = Activity.start Activity.Events.reuseTcResultsCachePresent [] |
| 129 | + |
| 130 | + if prevTcData = thisTcData then |
| 131 | + use _ = Activity.start Activity.Events.reuseTcResultsCacheHit [] |
| 132 | + |
| 133 | + () // do nothing, yet |
| 134 | + else |
| 135 | + use _ = Activity.start Activity.Events.reuseTcResultsCacheMissed [] |
| 136 | + |
| 137 | + writeThisTcData thisTcData |
| 138 | + |
| 139 | + | None -> |
| 140 | + use _ = Activity.start Activity.Events.reuseTcResultsCacheAbsent [] |
| 141 | + |
| 142 | + writeThisTcData thisTcData |
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