Format out of process (fsprojects#1845)

* Style guide lambda (fsprojects#1858)

* WIP lambda as last argument

* Update remaining test according to style proposal.

* Add test for multiline non lambda argument.

* Print trivia for function keyword from ast range.

* multiline non lambda argument, match lambda

* WIP Daemon service contract.

* Early working daemon prototype.

* Take .editorconfig settings into account.

* Fix current build.

* Add Fantomas locator.

* Found globally installed Fantomas version.

* Remove unused function.

* Add formatSelection.

* Refactor FormatDocumentResponse to DU.

* Remove unused LspTypes dependency.

* Update FCS in Daemon

* Refactored public api of FantomasService.

* Don't pass full exception in FormatDocumentResponse.

* Use separate versioning for Fantomas.Client.

* FantomasService manages multiple daemon versions.

* Fully implement FantomasService.

* Return configuration as json.

* Validate if filePath in request is absolute.

* Ignore first three 4.6 alphas as compatible tools.

* Find ignore file from current file path.

* Remove safeFileName from CodeFormatterImpl.fs.
Disable daemon tests.

* Add daemon unit tests.

* Update help text for daemon mode.

* Add documentation for Fantomas daemon mode.

* Initial attempt at adding source links.

* Set DebugType to embedded.

* Bump Fantomas.Client to 0.3.0

RELEASE_NOTES.md

@@ -1,3 +1,7 @@
+#### 4.6.0-alpha-004
+
+* Initial Fantomas.Client release.
+
 #### 4.6.0-alpha-003
 
 * Fix Update record should indent from the curly brace instead of the identifier. [#1876](https://github.com/fsprojects/fantomas/issues/1876)

build.fsx

@@ -51,6 +51,8 @@ let owner = "Anh-Dung Phan"
 let tags =
     "F# fsharp formatting beautifier indentation indenter"
 
+let fantomasClientVersion = "0.3.0"
+
 // (<solutionFile>.sln is built during the building process)
 let solutionFile = "fantomas"
 //// Environment.CurrentDirectory <- __SOURCE_DIRECTORY__
@@ -168,7 +170,9 @@ Target.create
           "src/Fantomas/bin"
           "src/Fantomas/obj"
           "src/Fantomas.CoreGlobalTool/bin"
-          "src/Fantomas.CoreGlobalTool/obj" ]
+          "src/Fantomas.CoreGlobalTool/obj"
+          "src/Fantomas.Client/bin"
+          "src/Fantomas.Client/obj" ]
         |> List.iter Shell.cleanDir)
 
 Target.create
@@ -180,13 +184,20 @@ Target.create
             let file =
                 sprintf "src/%s/%s.fsproj" project project
 
-            Xml.poke file "Project/PropertyGroup/Version/text()" version
+            Xml.poke
+                file
+                "Project/PropertyGroup/Version/text()"
+                (if project = "Fantomas.Client" then
+                     fantomasClientVersion
+                 else
+                     version)
 
         setProjectVersion "Fantomas"
         setProjectVersion "Fantomas.CoreGlobalTool"
         setProjectVersion "Fantomas.CoreGlobalTool.Tests"
         setProjectVersion "Fantomas.Tests"
-        setProjectVersion "Fantomas.Extras")
+        setProjectVersion "Fantomas.Extras"
+        setProjectVersion "Fantomas.Client")
 
 // --------------------------------------------------------------------------------------
 // Build library & test project
@@ -241,7 +252,11 @@ Target.create
                 { defaultArgs with
                       Properties =
                           [ "Title", project
-                            "PackageVersion", nugetVersion
+                            "PackageVersion",
+                            (if project = "Fantomas.Client" then
+                                 fantomasClientVersion
+                             else
+                                 nugetVersion)
                             "Authors", (String.Join(" ", authors))
                             "Owners", owner
                             "PackageRequireLicenseAcceptance", "false"
@@ -263,7 +278,8 @@ Target.create
 
         pack "Fantomas"
         pack "Fantomas.Extras"
-        pack "Fantomas.CoreGlobalTool")
+        pack "Fantomas.CoreGlobalTool"
+        pack "Fantomas.Client")
 
 // This takes the list of external projects defined above, does a git checkout of the specified repo and tag,
 // tries to build the project, then reformats with fantomas and tries to build the project again. If this fails

docs/Daemon mode.md

@@ -0,0 +1,24 @@
+# Fantomas Daemon mode
+
+## Introduction
+
+As part of the `4.6` release, we've introduced a new feature where end-user can control the version of Fantomas that is being used inside an IDE.
+In previous iterations, the editor tooling would typically reference the [Fantomas](https://www.nuget.org/packages/Fantomas) or [Fantomas.Extras](https://www.nuget.org/packages/Fantomas.Extras) nuget package and use the [CodeFormatter](../src/Fantomas/CodeFormatter.fsi) api to handle formatting.
+The major drawback of this approach is that shared [FCS](https://www.nuget.org/packages/FSharp.Compiler.Service/) dependency needed to be exactly the same.
+So the editor is in control of which version of Fantomas is being used.
+Each version of Fantomas theoretically can have a different outcome as the style guides may have changed over time.
+
+## Solution
+
+To tackle this problem, we introduce two new concepts: `--daemon` mode for the [fantomas-tool](https://www.nuget.org/packages/fantomas-tool) and [Fantomas.Client](https://www.nuget.org/packages/Fantomas.Client).
+`--daemon` would launch the commandline application as a sort of [LSP server](https://microsoft.github.io/language-server-protocol/) and `Fantomas.Client` could connect to this and proxy format requests.
+Editor tooling would be able to launch your pinned version of `fantomas-tool` as a daemon service and interact with it outside-of-process.
+
+## End-user impact
+
+End-users don't have to worry about `Fantomas.Client` or the `--daemon` flag. They only need to install a compatible version of `fantomas-tool`.
+Be it locally or globally. The first compatible version is `4.6.0-alpha-004`, all higher version should work as well.
+Local versions have precedence over the global version.
+
+The nice thing about this approach is that you can upgrade Fantomas at your own pace. 
+When new versions drop, you can dedicate a separate commit in source control and it won't interfere with your other commits.

docs/Documentation.md

@@ -18,7 +18,7 @@ For the overview how to use the tool, you can type the command
 	dotnet fantomas --help
 
 ```
-USAGE: dotnet fantomas [--help] [--recurse] [--force] [--profile] [--fsi <string>] [--stdin] [--stdout] [--out <string>] [--check] [--version] [<string>...]
+USAGE: dotnet fantomas [--help] [--recurse] [--force] [--profile] [--fsi <string>] [--stdin] [--stdout] [--out <string>] [--check] [--daemon] [--version] [<string>...]
 
 INPUT:
 
@@ -31,9 +31,10 @@ OPTIONS:
     --profile             Print performance profiling information.
     --fsi <string>        Read F# source from stdin as F# signatures.
     --stdin               Read F# source from standard input.
-    --stdout               Write the formatted source code to standard output.
+    --stdout              Write the formatted source code to standard output.
     --out <string>        Give a valid path for files/folders. Files should have .fs, .fsx, .fsi, .ml or .mli extension only.
     --check               Don't format files, just check if they have changed. Exits with 0 if it's formatted correctly, with 1 if some files need formatting and 99 if there was an internal error
+    --daemon              Daemon mode, launches an LSP-like server to can be used by editor tooling.
     --version, -v         Displays the version of Fantomas
     --help                display this list of options.
 
@@ -80,6 +81,10 @@ Or usage with `find` on unix:
 
 `find my-project/ -type f -name "*.fs" -not -path "*obj*" | xargs dotnet fantomas --check`
 
+### Daemon mode
+
+`--daemon` should not be used directly by end-users. Learn more about this feature in the [Daemon mode documentation](./Daemon%20mode.md)
+
 ## Configuration
 
 Fantomas ships with a series of format options.

fantomas.sln

@@ -20,6 +20,8 @@ Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "Fantomas.Benchmarks", "src\
 EndProject
 Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "Fantomas.Extras", "src\Fantomas.Extras\Fantomas.Extras.fsproj", "{4088FF76-1DB7-4E68-80FE-E851CE6701AC}"
 EndProject
+Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "Fantomas.Client", "src\Fantomas.Client\Fantomas.Client.fsproj", "{AA895F94-CCF2-4FCF-A9BB-E16987B57535}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -105,6 +107,18 @@ Global
 		{4088FF76-1DB7-4E68-80FE-E851CE6701AC}.Release|x64.Build.0 = Release|Any CPU
 		{4088FF76-1DB7-4E68-80FE-E851CE6701AC}.Release|x86.ActiveCfg = Release|Any CPU
 		{4088FF76-1DB7-4E68-80FE-E851CE6701AC}.Release|x86.Build.0 = Release|Any CPU
+		{AA895F94-CCF2-4FCF-A9BB-E16987B57535}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{AA895F94-CCF2-4FCF-A9BB-E16987B57535}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{AA895F94-CCF2-4FCF-A9BB-E16987B57535}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{AA895F94-CCF2-4FCF-A9BB-E16987B57535}.Debug|x64.Build.0 = Debug|Any CPU
+		{AA895F94-CCF2-4FCF-A9BB-E16987B57535}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{AA895F94-CCF2-4FCF-A9BB-E16987B57535}.Debug|x86.Build.0 = Debug|Any CPU
+		{AA895F94-CCF2-4FCF-A9BB-E16987B57535}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{AA895F94-CCF2-4FCF-A9BB-E16987B57535}.Release|Any CPU.Build.0 = Release|Any CPU
+		{AA895F94-CCF2-4FCF-A9BB-E16987B57535}.Release|x64.ActiveCfg = Release|Any CPU
+		{AA895F94-CCF2-4FCF-A9BB-E16987B57535}.Release|x64.Build.0 = Release|Any CPU
+		{AA895F94-CCF2-4FCF-A9BB-E16987B57535}.Release|x86.ActiveCfg = Release|Any CPU
+		{AA895F94-CCF2-4FCF-A9BB-E16987B57535}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 	EndGlobalSection

paket.dependencies

@@ -15,6 +15,7 @@ nuget Argu
 nuget BenchmarkDotNet
 nuget editorconfig
 nuget MAB.DotIgnore 3.0.2
+nuget Microsoft.SourceLink.GitHub copy_local: true
 
 github: fsprojects/fantomas:829faa6ba834f99afed9b4434b3a1680536474b2 src/Fantomas/CodePrinter.fs
 
@@ -23,11 +24,30 @@ group build
     source https://api.nuget.org/v3/index.json
 
     nuget Microsoft.Azure.Cosmos.Table
+    nuget FSharp.Core ~> 5
     nuget Fake.Core.ReleaseNotes
     nuget Fake.Core.Xml
     nuget Fake.DotNet.Cli
     nuget Fake.DotNet.Paket
     nuget Fake.Tools.Git
     nuget Fake.Core.Process
     nuget Fake.Core.Target
-    nuget MSBuild.StructuredLogger 2.1.500
+    nuget MSBuild.StructuredLogger 2.1.500
+
+group tool
+    storage: none
+    source https://api.nuget.org/v3/index.json
+
+    nuget FSharp.Core 5.0.3-beta.21352.5
+    nuget Argu
+    nuget StreamJsonRpc
+    nuget Thoth.Json.Net
+    nuget SerilogTraceListener
+
+group client
+    storage: none
+    source https://api.nuget.org/v3/index.json
+
+    nuget FSharp.Core 5
+    nuget StreamJsonRpc
+    nuget Microsoft.SourceLink.GitHub copy_local: true