codegen: --language fsharp flag (2.4.1)#406
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Adds a `--language` flag (csharp|fsharp, default csharp) to the `codegen` command so `dotnet run -- codegen write --language fsharp` writes the pre-generated code as F# (.fs) instead of C# (.cs). The F# emit capability (GeneratedAssembly.GenerateFSharpCode) already existed; this wires it through the CLI. - CodegenLanguage enum + GenerateCodeInput.LanguageFlag. - DynamicCodeBuilder.Language threads into the write and preview paths (renderCode picks GenerateFSharpCode vs GenerateCode; .fs vs .cs extension). - `codegen test --language fsharp` is rejected with a clear message (the test action uses in-memory C# Roslyn compilation, which doesn't apply to F#). - CI: SmokeTestCommands runs `codegen preview --language fsharp --start` against GeneratorTarget to validate the CLI flag emits F#. (Compilable/runnable pre-generated F# is proven downstream against real Wolverine handler chains.) - 5 unit tests for the language switch + .fs extension. Bumped JasperFxVersion to 2.4.1. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This was referenced Jun 1, 2026
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Adds a
--languageflag (csharp|fsharp, defaultcsharp) to thecodegencommand so a JasperFx app can pre-generate its runtime code as F#:The F# emit capability (
GeneratedAssembly.GenerateFSharpCode) already existed; this wires it through the CLI write/preview paths.Changes
CodegenLanguageenum +GenerateCodeInput.LanguageFlag.DynamicCodeBuilder.Languagethreads into both the write and preview paths —renderCodepicksGenerateFSharpCodevsGenerateCode, and the file extension is.fsvs.cs.codegen test --language fsharpis rejected with a clear message (thetestaction uses in-memory C# Roslyn compilation, which doesn't apply to F#).SmokeTestCommandsnow also runscodegen preview --language fsharp --startagainstGeneratorTarget, validating the flag emits F# end-to-end through the CLI..fsextension.JasperFxVersion→ 2.4.1.Verification
dotnet build jasperfx.slnx -c Releaseclean; 404 CodegenTests pass.codegen preview --language fsharpagainstGeneratorTargeton net9.0 and net10.0 — emitsnamespace/open/typeF#.Scope note
This proves the CLI plumbing. Compilable/runnable pre-generated F# is proven downstream against real Wolverine handler chains (the F# emitter targets the static model and is validated by Wolverine's behavioural run-step under
TypeLoadMode.Static). The experimental emitter's handling of some C#-style frames (e.g.return) is unchanged here.🤖 Generated with Claude Code