[BUG] tsgo list more files than tsc

[HananoshikaYomaru]

Can you confirm that the file lists between tsc --listFilesOnly and tsgo --listFilesOnly match?

If a file is not in that list, it should be impossible for its contents to be used.

for me, no they do not match

how to troubleshoot further.

version of tsgo: @typescript/native-preview@7.0.0-dev.20251219.1
version of typescript: typescript@5.9.3

Originally posted by @HananoshikaYomaru in #2405

importance: high ‼️
remark: this behaviour difference break the most basic tsgo --noEmit ci

[jakebailey]

Can you use --explainFiles to check?

[HananoshikaYomaru]

tsc.txt

tsgo.txt

@jakebailey here you are. Thank you for looking at it.

[jakebailey]

Comparing those is pretty much impossible.

Do you have an example of a file you are not expecting to be there?

Also, what are your tsconfig settings? What project is this?

Can you compare against TS 6.0 instead?

[HananoshikaYomaru]

@jakebailey it is a react project using react router.

{
	"compilerOptions": {
		"lib": ["DOM", "DOM.Iterable", "ES2022"],
		"types": ["@react-router/node", "vite/client", "bun"],
		"rootDirs": [".", "./.react-router/types"],
		"isolatedModules": true,
		"esModuleInterop": true,
		"module": "ESNext",
		"jsx": "react-jsx",
		"moduleResolution": "Bundler",
		"moduleDetection": "force",
		"resolveJsonModule": true,
		"target": "ES2022",
		"skipLibCheck": true,
		"strict": true,
		"allowJs": true,
		"noUncheckedIndexedAccess": true,
		"forceConsistentCasingInFileNames": true,
		// using any should be error
		"noImplicitAny": true,
		"paths": {
			"*": ["./*"],
			"~/*": ["./app/*"]
		},
		"noEmit": true
	},
	"include": ["./.react-router/types", "."],
	"exclude": ["node_modules", "dist", "src/payload-generated-schema.ts", "src/migrations"]
}

same behaviour difference using TS 6.

when running tsgo --noEmit, it shows

2  src/migrations/20251103_161045_v0_5_0.ts:4
     2  src/migrations/20251108_175955_v0_5_5.ts:4
     2  src/migrations/20251108_205148_v0_5_6.ts:4
     2  src/migrations/20251112_215652_v0_6_0.ts:4
     2  src/migrations/20251115_192550_v0_7_0.ts:7
     2  src/migrations/20251119_005342_v0_7_1.ts:4
     2  src/migrations/20251121_012340_v0_7_2.ts:8
     2  src/migrations/20251129_010524_v0_7_3.ts:4
     2  src/migrations/20251231_201458_v0_7_7.ts:4
     2  src/migrations/20260109_112642_v0_7_10.ts:4
     2  src/migrations/20260110_194728.ts:4

It means it is not respecting the tsconfig.json exclude

[HananoshikaYomaru]

I changed include to "include": ["./.react-router/types", "server", "app", "scripts"],, found that it still lint src/migrations.

I guess tsgo is not respecting both includes and excludes. As for why and does that only happens in particular condition, I didn't dig further.

[jakebailey]

That's not how include/exclude work. We still follow imports. That's why --explainFiles output should be helpful, since you can look at the output to determine why each file was included.

[HananoshikaYomaru]

I see. It seems like I missed understand how "includes" and "excludes" works. My intention is to exclude typescript error from "src/migrations" and "src/payload-generated-schema.ts".

But anyway, I still cannot figure out why tsgo and tsc have two different behaviour

[jakebailey]

I unfortunately don't know how to work on this without a repro I can test and debug myself ☹️

[HananoshikaYomaru]

the repo is this: https://github.com/paideia-lms/Paideia

the reproduce steps:

bun install 
# tsgo
bunx tsgo --noEmit
# tsc
bunx tsc--noEmit

[jakebailey]

Looking at the state on main, I actually think this was #2361. Can you retry with a newer build and see if they behave similarly?