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WorkspaceExtensions.fs
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[<AutoOpen>]
module internal Microsoft.VisualStudio.FSharp.Editor.WorkspaceExtensions
open System
open System.Runtime.CompilerServices
open Microsoft.CodeAnalysis
open Microsoft.VisualStudio.FSharp.Editor
open FSharp.Compiler
open FSharp.Compiler.CodeAnalysis
open FSharp.Compiler.CodeAnalysis.ProjectSnapshot
open FSharp.Compiler.Symbols
open FSharp.Compiler.BuildGraph
open CancellableTasks
open Internal.Utilities.Collections
open Newtonsoft.Json
open Newtonsoft.Json.Linq
open System.Text.Json.Nodes
#nowarn "57" // Experimental stuff
[<RequireQualifiedAccess>]
module internal ProjectCache =
/// This is a cache to maintain FSharpParsingOptions and FSharpProjectOptions per Roslyn Project.
/// The Roslyn Project is held weakly meaning when it is cleaned up by the GC, the FSharParsingOptions and FSharpProjectOptions will be cleaned up by the GC.
/// At some point, this will be the main caching mechanism for FCS projects instead of FCS itself.
let Projects =
ConditionalWeakTable<Project, FSharpChecker * FSharpProjectOptionsManager * FSharpParsingOptions * FSharpProjectOptions>()
type Solution with
/// Get the instance of IFSharpWorkspaceService.
member internal this.GetFSharpWorkspaceService() =
this.Workspace.Services.GetRequiredService<IFSharpWorkspaceService>()
module internal FSharpProjectSnapshotSerialization =
let serializeFileSnapshot (snapshot: FSharpFileSnapshot) =
let output = JObject()
output.Add("FileName", snapshot.FileName)
output.Add("Version", snapshot.Version)
output
let serializeReferenceOnDisk (reference: ReferenceOnDisk) =
let output = JObject()
output.Add("Path", reference.Path)
output.Add("LastModified", reference.LastModified)
output
let rec serializeReferencedProject (reference: FSharpReferencedProjectSnapshot) =
let output = JObject()
match reference with
| FSharpReference(projectOutputFile, snapshot) ->
output.Add("projectOutputFile", projectOutputFile)
output.Add("snapshot", serializeSnapshot snapshot)
| _ -> ()
output
and serializeSnapshot (snapshot: FSharpProjectSnapshot) =
let output = JObject()
let snapshot = snapshot.ProjectSnapshot
output.Add("ProjectFileName", snapshot.ProjectFileName)
output.Add("ProjectId", (snapshot.ProjectId |> Option.defaultValue null |> JToken.FromObject))
output.Add("SourceFiles", snapshot.SourceFiles |> Seq.map serializeFileSnapshot |> JArray)
output.Add("ReferencesOnDisk", snapshot.ReferencesOnDisk |> Seq.map serializeReferenceOnDisk |> JArray)
output.Add("OtherOptions", JArray(snapshot.OtherOptions))
output.Add("ReferencedProjects", snapshot.ReferencedProjects |> Seq.map serializeReferencedProject |> JArray)
output.Add("IsIncompleteTypeCheckEnvironment", snapshot.IsIncompleteTypeCheckEnvironment)
output.Add("UseScriptResolutionRules", snapshot.UseScriptResolutionRules)
output.Add("LoadTime", snapshot.LoadTime)
// output.Add("UnresolvedReferences", snapshot.UnresolvedReferences)
output.Add(
"OriginalLoadReferences",
snapshot.OriginalLoadReferences
|> Seq.map (fun (r: Text.range, a, b) -> JArray(r.FileName, r.Start, r.End, a, b))
|> JArray
)
output.Add("Stamp", (snapshot.Stamp |> (Option.defaultValue 0) |> JToken.FromObject))
output
let dumpToJson (snapshot) =
let jObject = serializeSnapshot snapshot
let json = jObject.ToString(Formatting.Indented)
json
open FSharpProjectSnapshotSerialization
open System.Collections.Concurrent
[<AutoOpen>]
module private CheckerExtensions =
let snapshotCache = AsyncMemoize(1000, 500, "SnapshotCache")
let latestSnapshots = ConcurrentDictionary<_, _>()
let exist xs = xs |> Seq.isEmpty |> not
let getFSharpOptionsForProject (this: Project) =
if not this.IsFSharp then
raise (OperationCanceledException("Project is not a FSharp project."))
else
match ProjectCache.Projects.TryGetValue(this) with
| true, result -> CancellableTask.singleton result
| _ ->
cancellableTask {
let! ct = CancellableTask.getCancellationToken ()
let service = this.Solution.GetFSharpWorkspaceService()
let projectOptionsManager = service.FSharpProjectOptionsManager
match! projectOptionsManager.TryGetOptionsByProject(this, ct) with
| ValueNone -> return raise (OperationCanceledException("FSharp project options not found."))
| ValueSome(parsingOptions, projectOptions) ->
let result =
(service.Checker, projectOptionsManager, parsingOptions, projectOptions)
return ProjectCache.Projects.GetValue(this, ConditionalWeakTable<_, _>.CreateValueCallback(fun _ -> result))
}
let documentToSnapshot (document: Document) =
cancellableTask {
let! version = document.GetTextVersionAsync()
let getSource () =
task {
let! sourceText = document.GetTextAsync()
return sourceText.ToFSharpSourceText()
}
return FSharpFileSnapshot(FileName = document.FilePath, Version = version.ToString(), GetSource = getSource)
}
let getReferencedProjectVersions (project: Project) =
project.GetAllProjectsThisProjectDependsOn()
|> Seq.map (fun r ct -> r.GetDependentSemanticVersionAsync(ct))
|> CancellableTask.whenAll
|> CancellableTask.map (Seq.map (fun x -> x.ToString()) >> Set)
let getOnDiskReferences (options: FSharpProjectOptions) =
options.OtherOptions
|> Seq.filter (fun x -> x.StartsWith("-r:"))
|> Seq.map (fun x ->
let path = x.Substring(3)
{
Path = path
LastModified = System.IO.File.GetLastWriteTimeUtc path
})
|> Seq.toList
let createProjectSnapshot (snapshotAccumulatorOpt) (project: Project) (options: FSharpProjectOptions option) =
cancellableTask {
let! options =
match options with
| Some options -> CancellableTask.singleton options
| None ->
cancellableTask {
let! _, _, _, options = getFSharpOptionsForProject project
return options
}
let! projectVersion = project.GetDependentSemanticVersionAsync()
let! referenceVersions = getReferencedProjectVersions project
let updatedSnapshot =
match project.IsTransparentCompilerSnapshotReuseEnabled, latestSnapshots.TryGetValue project.Id with
| true, (true, (_, _, oldReferenceVersions, _, _)) when referenceVersions <> oldReferenceVersions ->
System.Diagnostics.Trace.TraceWarning "Reference versions changed"
None
| true, (true, (_, _, _, _, oldSnapshot: FSharpProjectSnapshot)) when
oldSnapshot.ProjectSnapshot.ReferencesOnDisk <> (getOnDiskReferences options)
->
System.Diagnostics.Trace.TraceWarning "References on disk changed"
None
| true, (true, (_, oldProjectVersion, _, _, oldSnapshot: FSharpProjectSnapshot)) when projectVersion = oldProjectVersion ->
Some(CancellableTask.singleton oldSnapshot)
| true, (true, (oldProject, _oldProjectVersion, _oldReferencesVersion, oldOptions, oldSnapshot: FSharpProjectSnapshot)) when
FSharpProjectOptions.AreSameForChecking(options, oldOptions)
->
let changes = project.GetChanges(oldProject)
if
changes.GetAddedDocuments() |> exist
|| changes.GetRemovedDocuments() |> exist
|| changes.GetAddedMetadataReferences() |> exist
|| changes.GetRemovedMetadataReferences() |> exist
|| changes.GetAddedProjectReferences() |> exist
|| changes.GetRemovedProjectReferences() |> exist
then
// if any of that happened, we create it from scratch
System.Diagnostics.Trace.TraceWarning "Project change not covered by options - suspicious"
None
else
// we build it from the previous one
let changedDocuments = changes.GetChangedDocuments() |> Seq.toList
System.Diagnostics.Trace.TraceInformation
$"Incremental update of FSharpProjectSnapshot ({oldSnapshot.Label}) - {changedDocuments.Length} changed documents"
if changedDocuments.Length = 0 then
// this is suspicious
let _breakpoint = "here"
()
changedDocuments
|> Seq.map (project.GetDocument >> documentToSnapshot)
|> CancellableTask.whenAll
|> CancellableTask.map (Array.toList >> oldSnapshot.Replace)
|> Some
| _ -> None
let! newSnapshot =
match updatedSnapshot with
| Some snapshot -> snapshot
| _ ->
cancellableTask {
let solution = project.Solution
let projects =
solution.Projects
|> Seq.map (fun p -> p.FilePath, p.Documents |> Seq.map (fun d -> d.FilePath, d) |> Map)
|> Map
let getFileSnapshot (options: FSharpProjectOptions) path =
async {
let project = projects.TryFind options.ProjectFileName
if project.IsNone then
System.Diagnostics.Trace.TraceError(
"Could not find project {0} in solution {1}",
options.ProjectFileName,
solution.FilePath
)
let documentOpt = project |> Option.bind (Map.tryFind path)
let! version, getSource =
match documentOpt with
| Some document ->
async {
let! version = document.GetTextVersionAsync() |> Async.AwaitTask
let getSource () =
task {
let! sourceText = document.GetTextAsync()
return sourceText.ToFSharpSourceText()
}
return version.ToString(), getSource
}
| None ->
// This happens with files that are read from /obj
// Fall back to file system
let version = System.IO.File.GetLastWriteTimeUtc(path)
let getSource () =
task { return System.IO.File.ReadAllText(path) |> FSharp.Compiler.Text.SourceTextNew.ofString }
async.Return(version.ToString(), getSource)
return FSharpFileSnapshot(FileName = path, Version = version, GetSource = getSource)
}
let! snapshot =
FSharpProjectSnapshot.FromOptions(options, getFileSnapshot, ?snapshotAccumulator = snapshotAccumulatorOpt)
System.Diagnostics.Trace.TraceInformation $"Created new FSharpProjectSnapshot ({snapshot.Label})"
return snapshot
}
let latestSnapshotData =
project, projectVersion, referenceVersions, options, newSnapshot
latestSnapshots.AddOrUpdate(project.Id, latestSnapshotData, (fun _ _ -> latestSnapshotData))
|> ignore
return newSnapshot
}
let getOrCreateSnapshotForProject (project: Project) options snapshotAccumulatorOpt =
let key =
{ new ICacheKey<_, _> with
member _.GetKey() = project.Id
member _.GetVersion() = project
member _.GetLabel() = project.FilePath
}
snapshotCache.Get(
key,
async {
let! ct = Async.CancellationToken
return!
createProjectSnapshot snapshotAccumulatorOpt project options ct
|> Async.AwaitTask
}
)
let getProjectSnapshotForDocument (document: Document, options: FSharpProjectOptions) =
getOrCreateSnapshotForProject document.Project (Some options) None
type FSharpChecker with
/// Parse the source text from the Roslyn document.
member checker.ParseDocument(document: Document, parsingOptions: FSharpParsingOptions, userOpName: string) =
cancellableTask {
let! ct = CancellableTask.getCancellationToken ()
let! sourceText = document.GetTextAsync(ct)
return! checker.ParseFile(document.FilePath, sourceText.ToFSharpSourceText(), parsingOptions, userOpName = userOpName)
}
member checker.ParseDocumentUsingTransparentCompiler(document: Document, options: FSharpProjectOptions, userOpName: string) =
cancellableTask {
let! projectSnapshot = getProjectSnapshotForDocument (document, options)
return! checker.ParseFile(document.FilePath, projectSnapshot, userOpName = userOpName)
}
member checker.ParseAndCheckDocumentUsingTransparentCompiler
(
document: Document,
options: FSharpProjectOptions,
userOpName: string
) =
cancellableTask {
checker.TransparentCompiler.SetCacheSizeFactor(document.Project.TransparentCompilerCacheFactor)
let! projectSnapshot = getProjectSnapshotForDocument (document, options)
let! (parseResults, checkFileAnswer) = checker.ParseAndCheckFileInProject(document.FilePath, projectSnapshot, userOpName)
return
match checkFileAnswer with
| FSharpCheckFileAnswer.Aborted -> None
| FSharpCheckFileAnswer.Succeeded(checkFileResults) -> Some(parseResults, checkFileResults)
}
/// Parse and check the source text from the Roslyn document with possible stale results.
member checker.ParseAndCheckDocumentWithPossibleStaleResults
(
document: Document,
options: FSharpProjectOptions,
allowStaleResults: bool,
userOpName: string
) =
cancellableTask {
let! ct = CancellableTask.getCancellationToken ()
let! sourceText = document.GetTextAsync(ct)
let! textVersion = document.GetTextVersionAsync(ct)
let filePath = document.FilePath
let textVersionHash = textVersion.GetHashCode()
let parseAndCheckFile =
cancellableTask {
let! (parseResults, checkFileAnswer) =
checker.ParseAndCheckFileInProject(
filePath,
textVersionHash,
sourceText.ToFSharpSourceText(),
options,
userOpName = userOpName
)
return
match checkFileAnswer with
| FSharpCheckFileAnswer.Aborted -> None
| FSharpCheckFileAnswer.Succeeded(checkFileResults) -> Some(parseResults, checkFileResults)
}
let tryGetFreshResultsWithTimeout () =
cancellableTask {
let! worker =
Async.StartChild(
async {
try
return! parseAndCheckFile
with _ ->
return None
},
millisecondsTimeout = document.Project.FSharpTimeUntilStaleCompletion
)
try
return! worker
with :? TimeoutException ->
return None // worker is cancelled at this point, we cannot return it and wait its completion anymore
}
if allowStaleResults then
let! freshResults = tryGetFreshResultsWithTimeout ()
let! results =
match freshResults with
| Some x -> CancellableTask.singleton (Some x)
| None ->
cancellableTask {
match checker.TryGetRecentCheckResultsForFile(filePath, options, userOpName = userOpName) with
| Some(parseResults, checkFileResults, _) -> return Some(parseResults, checkFileResults)
| None -> return! parseAndCheckFile
}
return results
else
return! parseAndCheckFile
}
/// Parse and check the source text from the Roslyn document.
member checker.ParseAndCheckDocument
(
document: Document,
options: FSharpProjectOptions,
userOpName: string,
?allowStaleResults: bool
) =
cancellableTask {
if checker.UsesTransparentCompiler then
return! checker.ParseAndCheckDocumentUsingTransparentCompiler(document, options, userOpName)
else
let allowStaleResults =
match allowStaleResults with
| Some b -> b
| _ -> document.Project.IsFSharpStaleCompletionResultsEnabled
return!
checker.ParseAndCheckDocumentWithPossibleStaleResults(document, options, allowStaleResults, userOpName = userOpName)
}
type Document with
/// Get the FSharpParsingOptions and FSharpProjectOptions from the F# project that is associated with the given F# document.
member this.GetFSharpCompilationOptionsAsync(userOpName) =
if not this.Project.IsFSharp then
raise (OperationCanceledException("Document is not a FSharp document."))
else
match ProjectCache.Projects.TryGetValue(this.Project) with
| true, result -> CancellableTask.singleton result
| _ ->
cancellableTask {
let service = this.Project.Solution.GetFSharpWorkspaceService()
let projectOptionsManager = service.FSharpProjectOptionsManager
let! ct = CancellableTask.getCancellationToken ()
match! projectOptionsManager.TryGetOptionsForDocumentOrProject(this, ct, userOpName) with
| ValueNone -> return raise (OperationCanceledException("FSharp project options not found."))
| ValueSome(parsingOptions, projectOptions) ->
let result =
(service.Checker, projectOptionsManager, parsingOptions, projectOptions)
return ProjectCache.Projects.GetValue(this.Project, ConditionalWeakTable<_, _>.CreateValueCallback(fun _ -> result))
}
/// Get the compilation defines and language version from F# project that is associated with the given F# document.
member this.GetFsharpParsingOptionsAsync(userOpName) =
async {
let! _, _, parsingOptions, _ = this.GetFSharpCompilationOptionsAsync(userOpName)
return
CompilerEnvironment.GetConditionalDefinesForEditing parsingOptions,
parsingOptions.LangVersionText,
parsingOptions.StrictIndentation
}
/// Get the instance of the FSharpChecker from the workspace by the given F# document.
member this.GetFSharpChecker() =
let workspaceService = this.Project.Solution.GetFSharpWorkspaceService()
workspaceService.Checker
/// Get the instance of the FSharpMetadataAsSourceService from the workspace by the given F# document.
member this.GetFSharpMetadataAsSource() =
let workspaceService = this.Project.Solution.GetFSharpWorkspaceService()
workspaceService.MetadataAsSource
/// A non-async call that quickly gets FSharpParsingOptions of the given F# document.
/// This tries to get the FSharpParsingOptions by looking at an internal cache; if it doesn't exist in the cache it will create an inaccurate but usable form of the FSharpParsingOptions.
member this.GetFSharpQuickParsingOptions() =
let workspaceService = this.Project.Solution.GetFSharpWorkspaceService()
workspaceService.FSharpProjectOptionsManager.TryGetQuickParsingOptionsForEditingDocumentOrProject(this.Id, this.FilePath)
/// A non-async call that quickly gets the defines and F# language version of the given F# document.
/// This tries to get the data by looking at an internal cache; if it doesn't exist in the cache it will create an inaccurate but usable form of the defines and the language version.
member this.GetFsharpParsingOptions() =
let workspaceService = this.Project.Solution.GetFSharpWorkspaceService()
workspaceService.FSharpProjectOptionsManager.GetCompilationDefinesAndLangVersionForEditingDocument(this)
/// A non-async call that quickly gets the defines of the given F# document.
/// This tries to get the defines by looking at an internal cache; if it doesn't exist in the cache it will create an inaccurate but usable form of the defines.
member this.GetFSharpQuickDefines() =
match this.GetFsharpParsingOptions() with
| defines, _, _ -> defines
/// Parses the given F# document.
member this.GetFSharpParseResultsAsync(userOpName) =
cancellableTask {
let! checker, _, parsingOptions, options = this.GetFSharpCompilationOptionsAsync(userOpName)
if this.Project.UseTransparentCompiler then
return! checker.ParseDocumentUsingTransparentCompiler(this, options, userOpName)
else
return! checker.ParseDocument(this, parsingOptions, userOpName)
}
/// Parses and checks the given F# document.
member this.GetFSharpParseAndCheckResultsAsync(userOpName) =
cancellableTask {
let! checker, _, _, projectOptions = this.GetFSharpCompilationOptionsAsync(userOpName)
match! checker.ParseAndCheckDocument(this, projectOptions, userOpName, allowStaleResults = false) with
| Some results -> return results
| _ -> return raise (OperationCanceledException("Unable to get FSharp parse and check results."))
}
/// Get the semantic classifications of the given F# document.
member this.GetFSharpSemanticClassificationAsync(userOpName) =
cancellableTask {
let! checker, _, _, projectOptions = this.GetFSharpCompilationOptionsAsync(userOpName)
let! result =
if this.Project.UseTransparentCompiler then
async {
let! projectSnapshot = getProjectSnapshotForDocument (this, projectOptions)
return! checker.GetBackgroundSemanticClassificationForFile(this.FilePath, projectSnapshot)
}
else
checker.GetBackgroundSemanticClassificationForFile(this.FilePath, projectOptions)
return
result
|> Option.defaultWith (fun _ -> raise (OperationCanceledException("Unable to get FSharp semantic classification.")))
}
/// Find F# references in the given F# document.
member inline this.FindFSharpReferencesAsync(symbol, projectSnapshot: FSharpProjectSnapshot, [<InlineIfLambda>] onFound, userOpName) =
cancellableTask {
let! checker, _, _, projectOptions = this.GetFSharpCompilationOptionsAsync(userOpName)
let! symbolUses =
if this.Project.UseTransparentCompiler then
checker.FindBackgroundReferencesInFile(this.FilePath, projectSnapshot, symbol)
else
checker.FindBackgroundReferencesInFile(
this.FilePath,
projectOptions,
symbol,
canInvalidateProject = false,
fastCheck = this.Project.IsFastFindReferencesEnabled
)
do!
symbolUses
|> Seq.map onFound
|> CancellableTask.whenAll
|> CancellableTask.ignore
}
/// Try to find a F# lexer/token symbol of the given F# document and position.
member this.TryFindFSharpLexerSymbolAsync(position, lookupKind, wholeActivePattern, allowStringToken, userOpName) =
cancellableTask {
let! defines, langVersion, strictIndentation = this.GetFsharpParsingOptionsAsync(userOpName)
let! ct = CancellableTask.getCancellationToken ()
let! sourceText = this.GetTextAsync(ct)
return
Tokenizer.getSymbolAtPosition (
this.Id,
sourceText,
position,
this.FilePath,
defines,
lookupKind,
wholeActivePattern,
allowStringToken,
Some langVersion,
strictIndentation,
ct
)
}
type Project with
/// Find F# references in the given project.
member this.FindFSharpReferencesAsync(symbol: FSharpSymbol, projectSnapshot, onFound, userOpName) =
cancellableTask {
let declarationLocation =
symbol.SignatureLocation
|> Option.map Some
|> Option.defaultValue symbol.DeclarationLocation
let declarationDocument =
declarationLocation |> Option.bind this.Solution.TryGetDocumentFromFSharpRange
// Can we skip documents, which are above current, since they can't contain symbols from current one.
let! canSkipDocuments =
match declarationDocument with
| Some document when this.IsFastFindReferencesEnabled && document.Project = this ->
cancellableTask {
let! _, _, _, options = document.GetFSharpCompilationOptionsAsync(userOpName)
let signatureFile =
if not (document.FilePath |> isSignatureFile) then
document.FilePath + "i"
else
null
return
options.SourceFiles
|> Seq.takeWhile ((<>) document.FilePath)
|> Seq.filter ((<>) signatureFile)
|> Set
}
| _ -> CancellableTask.singleton Set.empty
let documents =
this.Documents
|> Seq.filter (fun document -> not (canSkipDocuments.Contains document.FilePath))
if this.IsFastFindReferencesEnabled then
do!
documents
|> Seq.map (fun doc ->
doc.FindFSharpReferencesAsync(symbol, projectSnapshot, (fun range -> onFound doc range), userOpName))
|> CancellableTask.whenAll
else
for doc in documents do
do! doc.FindFSharpReferencesAsync(symbol, projectSnapshot, (onFound doc), userOpName)
}
member this.GetFSharpCompilationOptionsAsync() = this |> getFSharpOptionsForProject
member this.GetFSharpProjectSnapshot(?snapshotAccumulator) =
cancellableTask { return! getOrCreateSnapshotForProject this None snapshotAccumulator }