[BUG] Compile error when orchestrion has been installed with a lower go version than the one in use

[eliottness]

Version of orchestrion
v0.9.0

Describe what happened:

I was reviewing #292 when I saw this after a fresh clone of https://github.com/traefik/traefik.git on commit d317cd90fcb579722ab29c35410c10b6a135f949 (main)

Describe what you expected:

I was expection the build to succeed because go build . does

Steps to reproduce the issue:

Additional environment details (Version of Go, Operating System, etc.):
Go version: v1.22.7

[RomainMuller]

Yeah so traefik's go.mod has go 1.23 so it's expected it won't build wth go 1.22... In this case, the go toolchain automatically uses a more recent compiler to "make it work" (because GOTOOLCHAIN was not set to local?).

The issue here is that while we end up using a go 1.23 compiler, the go AST & type checker package being used by orchestrion is the one it was built with, in this case 1.22, which prevents it from properly loading up in this case.

Short term, we should detect this situation and emit a clear warning; or bail out with a clear error indicating what the user should do (likely, re-build their local orchestrion with the proper toolchain).

Longer term, we might consider re-spawning orchestrion with the correct toolchain, since we have a full compiler toolchain available anyway...

[eliottness]

Short term answer is to upgrade you Go toolchain and to reinstall orchestrion with it.