Unexpected debug.ModuleVersion output in debug logs

[AnomalRoil]

Summary

It seems we might be invoking the debug.ModuleVersion function on a wrong backend here:

gopass/internal/backend/storage/fs/store.go

Lines 232 to 235 in 946ccf4

	// Version returns the version of this backend.
	func (s *Store) Version(context.Context) semver.Version {
	return debug.ModuleVersion("github.com/gopasspw/gopass/internal/backend/fs")
	}

But I'm not sure I understand what it's supposed to do and how it works, so maybe that's expected on a local dev branch and should only be correct in releases?

Steps To Reproduce

export GOPASS_HOMEDIR=/tmp/gopasstest
export GOPASS_DEBUG_LOG=init.log
gopass init --crypto age test
<should crash because test is not a good key>
cat init.log | grep backend

This should contain the following logs roughly

2024/10/02 21:15:02.558600 leaf/store.go:52	leaf.New	Instantiating "" at "/tmp/gopasstest3/.local/share/gopass/stores/root"
2024/10/02 21:15:02.558608 backend/storage.go:66	backend.DetectStorage	Failed to use requested gitfs for /tmp/gopasstest3/.local/share/gopass/stores/root: git repo does not exist at /tmp/gopasstest3/.local/share/gopass/stores/root/.git
2024/10/02 21:15:02.558614 backend/storage.go:73	backend.DetectStorage	Using fallback "fs" for "/tmp/gopasstest3/.local/share/gopass/stores/root"
2024/10/02 21:15:02.558654 debug/version.go:34	debug.ModuleVersion	no module github.com/gopasspw/gopass/internal/backend/fs found
2024/10/02 21:15:02.558659 fs/loader.go:29	fs.loader.New	Using Storage Backend: fs(0.0.0,path:/tmp/gopasstest3/.local/share/gopass/stores/root)
2024/10/02 21:15:02.558682 debug/version.go:34	debug.ModuleVersion	no module github.com/gopasspw/gopass/internal/backend/fs found
2024/10/02 21:15:02.558664 leaf/store.go:64	leaf.New	Storage for  => /tmp/gopasstest3/.local/share/gopass/stores/root initialized as fs(0.0.0,path:/tmp/gopasstest3/.local/share/gopass/stores/root)
2024/10/02 21:15:02.558690 age/loader.go:23	age.loader.New	Using Crypto Backend: age

Expected behavior

I expect not to see the lines about

debug.ModuleVersion	no module github.com/gopasspw/gopass/internal/backend/fs found

But when I try to correct the code to use github.com/gopasspw/gopass/internal/backend/storage/fs instead, which seems to exist:

gopass/internal/backend/storage/fs.go

Line 3 in d0be405

import _ "github.com/gopasspw/gopass/internal/backend/storage/fs" // register fs backend

it also doesn't work.

Environment

• OS: Ubuntu 22.04
• OS version: Linux 6.9.3-76060903-generic
• gopass Version: master
• Installation method: go build

[dominikschulz]

return debug.ModuleVersion("github.com/gopasspw/gopass/internal/backend/fs") is almost certainly wrong. But I wonder why it doesn't work with the correct module. Maybe it never properly worked ...