LSP diagnostics not working on Windows #1121
Description
Describe the bug
LSP diagnostic errors don't show up in neither VS Code, nor in Goland.
To Reproduce
https://github.com/koppa96/templ-lsp-repro
Expected behavior
I expect an error to be visible when I use a variable that is not declared in a scope.
Screenshots
The variable ajwskerf is clearly not declared, but is not underlined, and the IDE shows no problems about the file. Same thing happens in VS Code.
Logs
{"time":"2025-04-08T13:29:26.1674588+02:00","level":"INFO","msg":"lsp: starting up..."}
{"time":"2025-04-08T13:29:26.173959+02:00","level":"INFO","msg":"lsp: starting gopls..."}
{"time":"2025-04-08T13:29:26.1894604+02:00","level":"INFO","msg":"creating gopls client"}
{"time":"2025-04-08T13:29:26.189963+02:00","level":"INFO","msg":"creating proxy"}
{"time":"2025-04-08T13:29:26.189963+02:00","level":"INFO","msg":"creating templ server"}
{"time":"2025-04-08T13:29:26.189963+02:00","level":"INFO","msg":"listening"}
{"time":"2025-04-08T13:29:26.1909605+02:00","level":"INFO","msg":"client -> server: Initialize"}
{"time":"2025-04-08T13:29:26.3146584+02:00","level":"ERROR","msg":"walk error","error":"CreateFile /c%3A/Users/koppa.peter/GolandProjects/templtest: A rendszer nem találja a megadott elérési utat."}
{"time":"2025-04-08T13:29:26.3162292+02:00","level":"INFO","msg":"client -> server: Initialize end"}
{"time":"2025-04-08T13:29:26.3298162+02:00","level":"INFO","msg":"client -> server: Initialized"}
{"time":"2025-04-08T13:29:26.3298162+02:00","level":"INFO","msg":"client -> server: Initialized end"}
{"time":"2025-04-08T13:29:26.3303164+02:00","level":"INFO","msg":"client <- server: ShowMessage","message":"Loading packages..."}
{"time":"2025-04-08T13:29:26.5195718+02:00","level":"INFO","msg":"client -> server: DidOpen","uri":"file:///c%3A/Users/koppa.peter/GolandProjects/templtest/hello.templ"}
{"time":"2025-04-08T13:29:26.5205705+02:00","level":"INFO","msg":"setting source map cache contents","uri":"file:///c%3A/Users/koppa.peter/GolandProjects/templtest/hello.templ"}
{"time":"2025-04-08T13:29:26.5205705+02:00","level":"INFO","msg":"client -> server: DidOpen end"}
{"time":"2025-04-08T13:29:26.7888516+02:00","level":"INFO","msg":"client <- server: LogMessage","message":"2025/04/08 13:29:26 Created View (#1)\n\tdirectory=C:\\Users\\koppa.peter\\GolandProjects\\templtest\n\tview_type=\"GoMod\"\n\troot_dir=\"file:///C:/Users/koppa.peter/GolandProjects/templtest\"\n\tgo_version=\"go version go1.23.8 windows/amd64\"\n\tbuild_flags=[]\n\tenv={GOOS:windows GOARCH:amd64 GOCACHE:C:\\Users\\koppa.peter\\AppData\\Local\\go-build GOMODCACHE:C:\\Users\\koppa.peter\\go\\pkg\\mod GOPATH:C:\\Users\\koppa.peter\\go GOPRIVATE: GOFLAGS: GO111MODULE: GOTOOLCHAIN:auto GOROOT:C:\\Users\\koppa.peter\\go\\pkg\\mod\\golang.org\\toolchain@v0.0.1-go1.23.8.windows-amd64 GoVersion:23 GoVersionOutput:go version go1.23.8 windows/amd64\n ExplicitGOWORK: EffectiveGOPACKAGESDRIVER:}\n\tenv_overlay=[]\n"}
{"time":"2025-04-08T13:29:27.5667969+02:00","level":"INFO","msg":"client <- server: LogMessage","message":"2025/04/08 13:29:27 go/packages.Load #1\n\tview_id=\"1\"\n\tsnapshot=0\n\tdirectory=C:\\Users\\koppa.peter\\GolandProjects\\templtest\n\tquery=[C:\\Users\\koppa.peter\\GolandProjects\\templtest\\... builtin]\n\tpackages=2\n\tduration=777.4322ms\n"}
{"time":"2025-04-08T13:29:27.6016035+02:00","level":"INFO","msg":"client <- server: ShowMessage","message":"Finished loading packages."}
{"time":"2025-04-08T13:29:27.6016035+02:00","level":"INFO","msg":"client <- server: RegisterCapability"}
{"time":"2025-04-08T13:29:27.8444933+02:00","level":"INFO","msg":"client -> server: CodeAction","params":{"textDocument":{"uri":"file:///c%3A/Users/koppa.peter/GolandProjects/templtest/hello.templ"},"context":{"diagnostics":[]},"range":{"start":{"line":3,"character":18},"end":{"line":3,"character":18}}}}
{"time":"2025-04-08T13:29:27.901725+02:00","level":"INFO","msg":"client -> server: CodeAction end"}
{"time":"2025-04-08T13:29:28.01314+02:00","level":"INFO","msg":"client -> server: CodeAction","params":{"textDocument":{"uri":"file:///c%3A/Users/koppa.peter/GolandProjects/templtest/hello.templ"},"context":{"diagnostics":[]},"range":{"start":{"line":3,"character":18},"end":{"line":3,"character":18}}}}
{"time":"2025-04-08T13:29:28.3457828+02:00","level":"INFO","msg":"client <- server: LogMessage","message":"2025/04/08 13:29:28 go/packages.Load #2\n\tview_id=\"1\"\n\tsnapshot=1\n\tdirectory=C:\\Users\\koppa.peter\\GolandProjects\\templtest\n\tquery=[file=C:\\Users\\koppa.peter\\GolandProjects\\templtest\\hello_templ.go]\n\tpackages=1\n\tduration=719.5475ms\n"}
{"time":"2025-04-08T13:29:28.4259383+02:00","level":"INFO","msg":"client <- server: PublishDiagnostics"}
{"time":"2025-04-08T13:29:28.4259383+02:00","level":"INFO","msg":"client <- server: PublishDiagnostics: [0]","diagnostic":{"range":{"start":{"line":34,"character":65},"end":{"line":34,"character":73}},"severity":1,"code":"UndeclaredName","codeDescription":{"href":"https://pkg.go.dev/golang.org/x/tools/internal/typesinternal#UndeclaredName"},"source":"compiler","message":"undefined: ajwskerf"}}
{"time":"2025-04-08T13:29:28.4259383+02:00","level":"ERROR","msg":"unable to complete because the sourcemap for the URI doesn't exist in the cache","uri":"file:///C:/Users/koppa.peter/GolandProjects/templtest/hello.templ"}
{"time":"2025-04-08T13:29:28.7360915+02:00","level":"INFO","msg":"client <- server: LogMessage","message":"2025/04/08 13:29:28 go/packages.Load #4\n\tview_id=\"1\"\n\tsnapshot=1\n\tdirectory=C:\\Users\\koppa.peter\\GolandProjects\\templtest\n\tquery=[file=C:\\Users\\koppa.peter\\GolandProjects\\templtest\\hello_templ.go]\n\tpackages=1\n\tduration=721.9093ms\n"}
{"time":"2025-04-08T13:29:28.742141+02:00","level":"INFO","msg":"client -> server: CodeAction end"}
{"time":"2025-04-08T13:29:29.700788+02:00","level":"INFO","msg":"client <- server: PublishDiagnostics"}
{"time":"2025-04-08T13:29:29.700788+02:00","level":"INFO","msg":"client <- server: PublishDiagnostics: skipping go.mod diagnostics"}
templ info output
(✓) os [ goos=windows goarch=amd64 ]
(✓) go [ location=C:\Users\koppa.peter\go\pkg\mod\golang.org\toolchain@v0.0.1-go1.23.8.windows-amd64\bin\go.exe version=go version go1.23.8 windows/amd64 ]
(✓) gopls [ location=C:\Users\koppa.peter\go\bin\gopls.exe version=golang.org/x/tools/gopls v0.18.1 ]
(✓) templ [ location=C:\Users\koppa.peter\go\bin\templ.exe version=v0.3.857 ]
Desktop (please complete the following information):
- OS: Windows 10
- templ CLI version (
templ version): v0.3.857 - Go version (
go version): go version go1.23.8 windows/amd64 goplsversion (gopls version): golang.org/x/tools/gopls v0.18.1
Additional context
In the logs this line occurs:
{"time":"2025-04-08T13:29:26.5205705+02:00","level":"INFO","msg":"setting source map cache contents","uri":"file:///c%3A/Users/koppa.peter/GolandProjects/templtest/hello.templ"}
Which indicates that the file has been set in the source map cache.
Later when the LSP tries to publish diagnostics, this error happens:
{"time":"2025-04-08T13:29:28.4259383+02:00","level":"INFO","msg":"client <- server: PublishDiagnostics"}
{"time":"2025-04-08T13:29:28.4259383+02:00","level":"INFO","msg":"client <- server: PublishDiagnostics: [0]","diagnostic":{"range":{"start":{"line":34,"character":65},"end":{"line":34,"character":73}},"severity":1,"code":"UndeclaredName","codeDescription":{"href":"https://pkg.go.dev/golang.org/x/tools/internal/typesinternal#UndeclaredName"},"source":"compiler","message":"undefined: ajwskerf"}}
{"time":"2025-04-08T13:29:28.4259383+02:00","level":"ERROR","msg":"unable to complete because the sourcemap for the URI doesn't exist in the cache","uri":"file:///C:/Users/koppa.peter/GolandProjects/templtest/hello.templ"}
Seems, as if it was unable to find the file in the source map cache. I don't know if it's a logging issue, but in the log, that says the cache is being set, the file's uri contains c%3A instead of c:. Could be the issue.