methods not declared by package os

[etsai-stripe]

i am able to build my web assembly by

GOOS=js GOARCH=wasm go build -tags wasm -o main.wasm cmd/stripe/main_wasm.go

but when i ran tinygo build -o main.wasm -target wasm cmd/stripe/main_wasm.go

i got the following error

# github.com/spf13/afero
../../go/pkg/mod/github.com/spf13/afero@v1.6.0/os.go:83:12: Rename not declared by package os
../../go/pkg/mod/github.com/spf13/afero@v1.6.0/os.go:91:12: Chmod not declared by package os
../../go/pkg/mod/github.com/spf13/afero@v1.6.0/os.go:95:12: Chown not declared by package os
../../go/pkg/mod/github.com/spf13/afero@v1.6.0/os.go:99:12: Chtimes not declared by package os
../../go/pkg/mod/github.com/spf13/afero@v1.6.0/os.go:108:12: Symlink not declared by package os

go version: go version go1.17.2 darwin/amd64
tinygo version: tinygo version 0.23.0 darwin/amd64 (using go version go1.17.2 and LLVM version 14.0.0)

please advice
thanks!

[dkegel-fastly]

What version of tinygo are you using? 0.23 should have Rename, Chmod, and Symlink.

Here's the pull request that added Rename:
#2481

You could contribute stubs for Chown and Chtimes, they're not that hard to write!
Here's an example of how to write a stub:

#2313

[etsai-stripe]

thank you @dkegel-fastly !

[mar1n3r0]

Symlink not declared in version 0.26 also in the example from @etsai-stripe which is 0.23 and supposed to have the implementation. What are we missing?

tinygo version 0.26.0 linux/amd64 (using go version go1.19.2 and LLVM version 14.0.0)

Seems like it's been implemented for unix only while the wasm target is not covered by file_other.go

Here is what happens if I copy the Symlink implementation from https://github.com/tinygo-org/tinygo/blob/release/src/os/file_unix.go

tinygo build -o web.wasm -target wasm main.go
undeclared name: ignoringEINTR
Symlink not declared by package syscall

And with WASI:

tinygo build -wasm-abi=generic -target=wasi -o web.wasm main.go
../../../../../usr/lib/go-1.19/src/os/user/cgo_lookup_unix.go:18:6: not implemented: build constraints in #cgo line
../../../../../usr/lib/go-1.19/src/os/user/cgo_lookup_unix.go:21:10: fatal: 'pwd.h' file not found
../../../../../usr/lib/go-1.19/src/os/user/getgrouplist_unix.go:12:10: fatal: 'grp.h' file not found

Depends on WASI: golang/go#31105

[dkegel-fastly]

I haven't checked whether wasi really supports symlink, but I guess it could at least be a stub...

[mar1n3r0]

I haven't checked whether wasi really supports symlink, but I guess it could at least be a stub...

https://docs.rs/wasi/0.9.0+wasi-snapshot-preview1/wasi/fn.path_symlink.html

I can't see any of the os packages related to file that is targeting a wasi build though. I have seen the implementation in file_unix.go and noticed that file_other.go is targeting wasm but not wasi. Where should I look for that in tinygo?