UpgradeProject code fixer for C# #17435

jcouv · 2017-02-27T23:31:38Z

Some background:

Starting with the first quarterly release of VS2017, we plan to release minor versions of the languages.
This means two changes to the compiler:

add a new langver ("7.1"),
updated langver="latest" to mean "7.1" (but leave langver="default" to mean "7").

This will be accompanied by some IDE changes:

add an entry "C# 7.1" to the Language Version dropdown,
add an entry for "latest" to the dropdown.

While it is always possible for users to select a specific language version, we expect most users to use "default" (slow train) or "latest" (fast train).

This code fixer will assist users who are on "default" to upgrade their project configuration to "latest".

Relates to #17173 (adding support for point releases)

@dotnet/roslyn-ide for discussion and review.
FYI @gafter @jaredpar

jasonmalinowski · 2017-02-27T23:33:59Z

src/Compilers/CSharp/Portable/CSharpCodeAnalysis.csproj

@@ -849,6 +849,7 @@
    <InternalsVisibleTo Include="Microsoft.CodeAnalysis.CompilerServer" />
    <InternalsVisibleTo Include="VBCSCompiler" />
    <InternalsVisibleTo Include="VBCSCompilerPortable" />
+    <InternalsVisibleTo Include="Microsoft.VisualStudio.LanguageServices" />


This is not allowed.

jcouv · 2017-02-27T23:37:26Z

src/Features/CSharp/Portable/UpgradeProject/CSharpUpgradeProjectCodeFixProvider.cs

+        /// Displays the version number in the format expected on the command-line (/langver flag).
+        /// For instance, "6", "7", "7.1", "latest".
+        /// </summary>
+        internal static string Display(this LanguageVersion version)


I would much like to avoid duplicating this method. Any tips? #Resolved

jcouv · 2017-02-27T23:40:47Z

A couple of side notes:

We need a reference to VSLangProj2. Jared's asking the VS team to publish it as a package. In the meantime this PR won't pass CI (I built using a local reference).
Any tips to improve the preview for the code action (see screenshot above)? I don't think showing the diagnostic is very useful there. #Resolved

CyrusNajmabadi · 2017-02-27T23:42:11Z

I would much like to avoid duplicating this method. Any tips?

Make it a public API. Or use some linked file trickery. #Resolved

jasonmalinowski · 2017-02-27T23:36:02Z

src/Compilers/CSharp/Test/CommandLine/CommandLineTests.cs

+            {
+                foreach (LanguageVersion version in Enum.GetValues(typeof(LanguageVersion)))
+                {
+                    yield return version;


Why the yield return when we're just doing a foreach to begin with? #Resolved

Enum.GetValues returns an Array (msdn). #Resolved

Can you not cast that array to LanguageVersion[]? #Resolved

i think you can just cast that to a LanguageVersion[] (which is an IEnumerable) #Resolved

or just call .Cast #Resolved

jasonmalinowski · 2017-02-27T23:38:09Z

src/Features/CSharp/Portable/UpgradeProject/CSharpUpgradeProjectCodeFixProvider.cs

+            var fixAllProjectsTitle = string.Format(CSharpFeaturesResources.Upgrade_all_projects_to_csharp_language_version_0,
+                newVersion.Display());
+
+            var fixAllProjects = new SolutionChangeAction(fixAllProjectsTitle, ct => UpgradeProjects(solution, newVersion));


Why not using the cancellation token? #Resolved

There's also a public API CodeAction.Create() rather than referencing the underlying type directly. #Resolved

CodeAction.Create produces warning RS0005: Do not use generic CodeAction.Create to create CodeAction. #Resolved

What do you think I should use the cancellation token in? There is no async code at this point (we just produce a callback for later). #Resolved

jasonmalinowski · 2017-02-27T23:44:30Z

src/Features/CSharp/Portable/UpgradeProject/CSharpUpgradeProjectCodeFixProvider.cs

+            {
+                if (project.Language == LanguageNames.CSharp)
+                {
+                    currentSolution = await UpgradeProject(project, currentSolution, version).ConfigureAwait(true);


Why the asynchrony here when UpgradeProject is synchronous? #Resolved

jasonmalinowski · 2017-02-27T23:44:43Z

src/Features/CSharp/Portable/UpgradeProject/CSharpUpgradeProjectCodeFixProvider.cs

+            {
+                if (project.Language == LanguageNames.CSharp)
+                {
+                    currentSolution = await UpgradeProject(project, currentSolution, version).ConfigureAwait(true);


This should be ConfigureAwait(false), not true, but no async is even better. #Resolved

jasonmalinowski · 2017-02-27T23:45:39Z

src/Features/CSharp/Portable/UpgradeProject/CSharpUpgradeProjectCodeFixProvider.cs

+            }
+        }
+
+        private static Task<Solution> UpgradeProject(Project project, Solution solution, LanguageVersion version)


This is really confusing that you're passing both the project and solution, especially in the UpgradeProjects case where they are from different snapshots. #Resolved

jasonmalinowski · 2017-02-27T23:49:04Z

src/VisualStudio/Core/Def/ServicesVSResources.resx

@@ -501,6 +501,9 @@ Use the dropdown to view and switch to other projects this file may belong to.</
  <data name="This_workspace_only_supports_opening_documents_on_the_UI_thread" xml:space="preserve">
    <value>This workspace only supports opening documents on the UI thread.</value>
  </data>
+  <data name="This_workspace_does_not_support_updating_VisualBasic_parse_options" xml:space="preserve">
+    <value>This workspace does not support updating VisualBasic parse options.</value>


"Visual Basic". (This also looks like we're really cutting corners here...) #Resolved

I'm happy to add support for VB, but I could not find a DTE API to update it. The intent is not to cut corners. #Resolved

jasonmalinowski · 2017-02-27T23:49:31Z

src/VisualStudio/Core/Def/ServicesVisualStudio.csproj

@@ -217,6 +217,14 @@
      <Project>{1EE8CAD3-55F9-4D91-96B2-084641DA9A6C}</Project>
      <Name>CodeAnalysis</Name>
    </ProjectReference>
+    <ProjectReference Include="..\..\..\Compilers\CSharp\Portable\CSharpCodeAnalysis.csproj">


Mentioned in another file, but this can't reference language specific binaries. #Resolved

jasonmalinowski · 2017-02-27T23:49:41Z

src/VisualStudio/Core/Def/ServicesVisualStudio.csproj

@@ -305,6 +313,9 @@
    <Reference Include="System.Xml.Linq" />
    <Reference Include="UIAutomationProvider" />
    <Reference Include="UIAutomationTypes" />
+    <Reference Include="VSLangProj2">
+      <HintPath>..\..\..\..\Binaries\VSLangProj2.dll</HintPath>


This seems fishy. #Resolved

This will not be checked-in as-is. I'm blocked on getting a nuget package with this binary (so I copied it locally to unblock progress). #Resolved

jasonmalinowski · 2017-02-27T23:51:10Z

src/Workspaces/Core/Portable/Workspace/Workspace.cs

@@ -1136,6 +1139,16 @@ private void CheckAllowedProjectChanges(ProjectChanges projectChanges)
            }
        }

+        private bool CanApplyParseOptionChange(ParseOptions old, ParseOptions @new)
+        {
+            // only changes to C# LanguageVersion are supported at this point


This shouldn't be happening at the core Workspace type. The description you are defining is a behavior of the host, and should be overridable if necessary. #Resolved

Hum. The trouble I have with moving this is that in VisualStudioWorkplaceImpl I no longer am able to implement this check, because only the new ParseOptions are available...
I'll need to think more about this.

jasonmalinowski · 2017-02-27T23:51:24Z

src/Workspaces/Core/Portable/Workspaces.csproj

@@ -25,6 +25,14 @@
      <Project>{1EE8CAD3-55F9-4D91-96B2-084641DA9A6C}</Project>
      <Name>CodeAnalysis</Name>
    </ProjectReference>
+    <ProjectReference Include="..\..\..\Compilers\CSharp\Portable\CSharpCodeAnalysis.csproj">


This assembly also cannot reference language-specific types. #Resolved

jasonmalinowski · 2017-02-27T23:55:01Z

The display function should very much be a public API. For the display, I'd recommend you look at the add reference code actions (@CyrusNajmabadi can point you to the exact code) because we have places today where we make other changes to projects and say what they are. #Resolved

jcouv · 2017-02-28T17:59:42Z

src/Compilers/CSharp/Portable/PublicAPI.Unshipped.txt

@@ -259,6 +260,8 @@ static Microsoft.CodeAnalysis.CSharp.CSharpExtensions.GetDeclaredSymbol(this Mic
 static Microsoft.CodeAnalysis.CSharp.CSharpExtensions.GetDeclaredSymbol(this Microsoft.CodeAnalysis.SemanticModel semanticModel, Microsoft.CodeAnalysis.CSharp.Syntax.TupleElementSyntax declarationSyntax, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> Microsoft.CodeAnalysis.ISymbol
 static Microsoft.CodeAnalysis.CSharp.CSharpExtensions.GetDeclaredSymbol(this Microsoft.CodeAnalysis.SemanticModel semanticModel, Microsoft.CodeAnalysis.CSharp.Syntax.TupleExpressionSyntax declaratorSyntax, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> Microsoft.CodeAnalysis.INamedTypeSymbol
 static Microsoft.CodeAnalysis.CSharp.CSharpExtensions.GetForEachStatementInfo(this Microsoft.CodeAnalysis.SemanticModel semanticModel, Microsoft.CodeAnalysis.CSharp.Syntax.CommonForEachStatementSyntax forEachStatement) -> Microsoft.CodeAnalysis.CSharp.ForEachStatementInfo
+static Microsoft.CodeAnalysis.CSharp.LanguageVersionExtensions.Display(this Microsoft.CodeAnalysis.CSharp.LanguageVersion version) -> string
+static Microsoft.CodeAnalysis.CSharp.LanguageVersionExtensions.WithLanguageVersion(this Microsoft.CodeAnalysis.CSharp.LanguageVersion default, string new) -> Microsoft.CodeAnalysis.CSharp.LanguageVersion


FYI @gafter @jaredpar for public API change. We need an API that can print a language version to the format used on the command-line (for LanguageVersion.CSharp71 is should output "7.1") and we need an API for parsing back.

FYI @OmarTawfik since this is trying to make a public API exposing our parsing for language version. #Resolved

The terminology we use for one direction is "ToDisplayString". I imagine we might want a TryParseDisplayString to go in the other direction. #Resolved

I'll change to ToDisplayString.
For parsing, the trouble is which type should this method be exposed from? We can't have LanguageVersion.TryParseDisplayString (which would have been ideal) because it is enum type :-(

CyrusNajmabadi · 2017-02-28T19:06:06Z

src/Compilers/CSharp/Portable/LanguageVersion.cs

+                    return LanguageVersion.Default;
+                case "latest":
+                    return LanguageVersion.Latest;
+                default:


this worries me. #Resolved

CyrusNajmabadi · 2017-02-28T19:07:18Z

src/EditorFeatures/CSharpTest/Diagnostics/UpgradeProject/UpgradeProjectTests.cs

+        var x = (1, 2);
+    }
+}",
+new CSharpParseOptions(LanguageVersion.CSharp6));


i don't see how this tets is actually validating anything. is the intent to add validation later? #Resolved

I haven't figured out how to test more than this in unittest at this point. The test helper methods don't return anything (modified project or solution) that I could inspect.

I plan to add integration tests. #Resolved

CyrusNajmabadi · 2017-02-28T19:07:25Z

src/EditorFeatures/CSharpTest/Diagnostics/UpgradeProject/UpgradeProjectTests.cs

+new CSharpParseOptions(LanguageVersion.CSharp6));
+        }
+
+        internal override (DiagnosticAnalyzer, CodeFixProvider) CreateDiagnosticProviderAndFixer(Workspace workspace)


goes at top of test file. #Resolved

CyrusNajmabadi · 2017-02-28T19:07:38Z

src/Features/CSharp/Portable/CSharpFeaturesResources.resx

@@ -482,6 +482,12 @@
  <data name="Autoselect_disabled_due_to_possible_deconstruction_declaration" xml:space="preserve">
    <value>Autoselect disabled due to possible deconstruction declaration.</value>
  </data>
+  <data name="Upgrade_project_to_csharp_language_version_0" xml:space="preserve">
+    <value>Upgrade project to C# language version '{0}</value>


missing close quote. #Resolved

CyrusNajmabadi · 2017-02-28T19:07:46Z

src/Features/CSharp/Portable/CSharpFeaturesResources.resx

+    <value>Upgrade project to C# language version '{0}</value>
+  </data>
+  <data name="Upgrade_all_projects_to_csharp_language_version_0" xml:space="preserve">
+    <value>Upgrade all projects to C# language version '{0}</value>


missing close quote. #Resolved

CyrusNajmabadi · 2017-02-28T19:08:31Z

src/Features/CSharp/Portable/UpgradeProject/CSharpUpgradeProjectCodeFixProvider.cs

+            var fixOneProjectTitle = string.Format(CSharpFeaturesResources.Upgrade_project_to_csharp_language_version_0,
+                newVersion.Display());
+
+            var fixOneProject = new SolutionChangeAction(fixOneProjectTitle,


you'll need to provide your own subclass of SolutionChangeAction so that we can track these with telemetry. #Resolved

CyrusNajmabadi · 2017-02-28T19:08:58Z

src/Features/CSharp/Portable/UpgradeProject/CSharpUpgradeProjectCodeFixProvider.cs

+            var fixOneProject = new SolutionChangeAction(fixOneProjectTitle,
+                ct => Task.FromResult(UpgradeProject(solution, project.Id, newVersion)));
+
+            var fixAllProjectsTitle = string.Format(CSharpFeaturesResources.Upgrade_all_projects_to_csharp_language_version_0,


only register this if the solution has multiple C# projects. #Resolved

CyrusNajmabadi · 2017-02-28T19:09:13Z

src/Features/CSharp/Portable/UpgradeProject/CSharpUpgradeProjectCodeFixProvider.cs

+                newVersion.Display());
+
+            var fixAllProjects = new SolutionChangeAction(fixAllProjectsTitle,
+                ct => Task.FromResult(UpgradeProjects(solution, newVersion)));


UpgradeAllProjects #Resolved

CyrusNajmabadi · 2017-02-28T19:09:30Z

src/Features/CSharp/Portable/UpgradeProject/CSharpUpgradeProjectCodeFixProvider.cs

+            var fixAllProjects = new SolutionChangeAction(fixAllProjectsTitle,
+                ct => Task.FromResult(UpgradeProjects(solution, newVersion)));
+
+            return new CodeAction[] { fixOneProject, fixAllProjects }.AsImmutable();


return ImmutableArray.Create(...) #Resolved

CyrusNajmabadi · 2017-02-28T19:10:38Z

src/Features/CSharp/Portable/UpgradeProject/CSharpUpgradeProjectCodeFixProvider.cs

+        private const string CS8059 = nameof(CS8059); // error CS8059: Feature is not available in C# 6.  Please use language version X or greater.
+
+        public override ImmutableArray<string> FixableDiagnosticIds
+            => ImmutableArray.Create(CS8022, CS8023, CS8024, CS8025, CS8026, CS8059);


if you make this { get; } property, then you can just reference this property in a non-allocating way in your SuggestedVersion helper. #Resolved

CyrusNajmabadi · 2017-02-28T19:11:55Z

src/Features/Core/Portable/UpgradeProject/AbstractUpgradeProjectCodeFixProvider.cs

+{
+    internal abstract partial class AbstractUpgradeProjectCodeFixProvider : CodeFixProvider
+    {
+        public override Task RegisterCodeFixesAsync(CodeFixContext context)


the core algorithm could be here (esp. as it will be the same for VB). Plus this is where you can put your SolutoinChangeAction subclass. Only keep C# specific logic in the C# layer. #Resolved

CyrusNajmabadi · 2017-02-28T19:12:28Z

src/Workspaces/CSharp/Portable/LanguageServices/CSharpParseOptionsService.cs

+        public string GetLanguageVersion(ParseOptions options)
+        {
+            return ((CSharpParseOptions)options).LanguageVersion.Display();
+        }


use => #Resolved

CyrusNajmabadi · 2017-02-28T19:12:55Z

src/Workspaces/Core/Portable/Workspace/Workspace.cs

+            {
+                return false;
+            }
+            var newLanguageVersion = parseOptionsService.GetLanguageVersion(@new);


newline after } #Resolved

CyrusNajmabadi · 2017-02-28T19:13:14Z

src/Workspaces/CSharp/Portable/LanguageServices/CSharpParseOptionsService.cs

+namespace Microsoft.CodeAnalysis.CSharp
+{
+    [ExportLanguageService(typeof(IParseOptionsService), LanguageNames.CSharp), Shared]
+    internal class CSharpParseOptionsService : IParseOptionsService


no VB impl? #Resolved

The VB scenario cannot be lit up yet, because I couldn't find a DTE API to update the LanguageVersion. Any tips how to handle that?

@jcouv: file a bug if you haven't.

Tracked by #17173

from diagnostics

…o IParseOptionsService

jcouv · 2017-03-14T21:31:58Z

@dotnet-bot test ubuntu_14_debug_prtest please

jcouv · 2017-03-14T21:38:59Z

@dotnet-bot test windows_release_vs-integration_prtest please

jcouv · 2017-03-14T21:39:39Z

@dotnet-bot test windows_debug_vs-integration_prtest please

jcouv · 2017-03-14T23:30:54Z

@dotnet-bot test windows_debug_vs-integration_prtest please

jcouv · 2017-03-15T01:24:14Z

Yay! Merged :-)
Thanks all for the feedback and support.

jcouv added Area-Compilers Area-IDE labels Feb 27, 2017

jcouv added this to the 2.1 milestone Feb 27, 2017

jcouv self-assigned this Feb 27, 2017

dnfclas added the cla-already-signed label Feb 27, 2017

jasonmalinowski previously requested changes Feb 27, 2017

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jcouv force-pushed the upgrade-project branch 2 times, most recently from ad1d0bc to f1cbc73 Compare February 27, 2017 23:36

jcouv commented Feb 27, 2017

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jasonmalinowski reviewed Feb 27, 2017

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jcouv force-pushed the upgrade-project branch 2 times, most recently from 511a9ec to 5d04a06 Compare February 28, 2017 02:13

jcouv commented Feb 28, 2017

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CyrusNajmabadi reviewed Feb 28, 2017

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jcouv and others added 18 commits March 14, 2017 14:11

Use SpecifiedLanguageVersion, rename API to TryParse and extract version

685fafd

from diagnostics

PR feedback (3)

d86922f

Updating test

7e895df

Merging implementations of TryParseLanguageVersion

280689b

Use published VSLangeProj2 package

f3461b0

Fixing bad merge

7752d56

Fix nuget downgrade warning

ab8cbf9

Updating test following rebase

7b9d347

PR feedback

97a9af4

Add test for fix-all scenario

e913a27

Add test for code action titles

cb0dae3

Check version too before offering to 'fix all'

1da8634

Moving CanApplyParseOptionChange logic down into VS Workspace layer

73d3709

Adding tests for VB GetRequiredLanguageVersion

ead449f

Implement corresponding VB APIs

2c952ac

Re-organizing compiler code from discussion with Aleksey and Chuck

5820b9c

Tweaks

2d48bdf

Fix spacing, static reference on instance instead of type, throw if n…

2c5cf56

…o IParseOptionsService

jcouv force-pushed the upgrade-project branch from 2975f92 to 2c5cf56 Compare March 14, 2017 21:13

Reverting files that only differnt in spaces

a6cdef3

jcouv merged commit a3a382b into dotnet:master Mar 15, 2017

jcouv deleted the upgrade-project branch March 15, 2017 01:24

jcouv mentioned this pull request May 30, 2017

Add LangVersion 7.2 for C# #19846

Merged

jcouv mentioned this pull request Nov 27, 2017

Upgrade language version fixer fails to update the correct program configuration #23342

Closed

davkean mentioned this pull request Nov 27, 2017

Upgrade language version fixer fails to update the correct program configuration dotnet/project-system#2985

Closed

UpgradeProject code fixer for C# #17435

UpgradeProject code fixer for C# #17435

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