Go1.18: cannot find all dependencies, unable to resolve root package

[tylfin]

Describe the bug

Upgrading our project to Go1.18 leads to swag raising an error message. I saw another Github issue and think the issue might be related to the use of the parseDependency flag and the changes to go mod

Error Message

When I first upgraded, the swag command hung indefinitely, so I added the GOWORK=off GOFLAGS="-mod=vendor" environment variables and started to receive the message cannot find all dependencies, unable to resolve root package:

$ GOWORK=off GOFLAGS="-mod=vendor" swag init --parseDependency --generalInfo [YY] --dir /[XX] --output /[XX]/swagger --exclude /[XX]/[ZZ]
2022/03/25 20:18:46 Generate swagger docs....
2022/03/25 20:18:46 Generate general API Info, search dir:/[XX]
2022/03/25 20:18:51 pkg XX/YY cannot find all dependencies, unable to resolve root package

Expected behavior

Swag files generate same as before

Your swag version

1.8.0

Your go version

1.18

Desktop (please complete the following information):

• OS: macOS, Linux (Docker)

[ubogdan]

You made so many changes that it's almost impossible to figure out the issue.

Please do a 1 step change until you can conclude where the issue is and let us know.

[tylfin]

Everything worked until the upgrade to Go1.18 / deprecation of the GOPATH, I was able to get swag to generate again forcing GO111MODULE=off and specifying a GOPATH.

The issue may be that this dependency doesn't handle go modules correctly? https://github.com/KyleBanks/depth

[ubogdan]

I have no clue, and I usually don't set GOPATH. On the other go1.18 just got released, and it will take some time until all the ecosystem will align with the newest changes.

If using go1.18 with swag is essential to you, please feel free to contribute with a PR, and I will be pleased to assist you with a CR.

[tylfin]

Sure I could take a look, what about shelling out to go list as a fallback to remain compatible across many versions of Go?

[QiqiM]

I also encountered this problem.

when i use --parseInternal --parseDependency --parseDepth=100 to genarate doc, will happen error

cannot find all dependencies, unable to resolve root package

• go: 1.18.3
• swag: 1.8.3
• os: win10

[xuehuiye]

I fixed this problem by install latest swag:

$ go install github.com/swaggo/swag/cmd/swag@latest
$ swag --version
swag version v1.16.2
$ go version
 go1.20.6 darwin/arm64