x/vgo: unexpected list command behaviour

[bench]

What version of Go are you using (go version)?

go version go1.10.3 linux/amd64

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

GOARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOROOT="/usr/local/go"
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build039741224=/tmp/go-build -gno-record-gcc-switches"

What did you do?

I followed the vgo tour available at [https://research.swtch.com/vgo-tour] with the latest version of vgo (installed via go get -u golang.org/x/vgo)

It appears that the command vgo list -m and vgo list -t rsc.io/sampler do not behave as expected.

What did you expect to see?

$ vgo list -m

$ vgo list -m  
MODULE                                    VERSION
github.com/you/hello  -
golang.org/x/text                         v0.3.0
rsc.io/quote                              v1.5.2
rsc.io/sampler                            v1.3.0

$ vgo list -t rsc.io/sampler

$ vgo list -t rsc.io/sampler
rsc.io/sampler
	v1.0.0
	v1.2.0
	v1.2.1
	v1.3.0
	v1.3.1
	v1.99.99

What did you see instead?

$ vgo list -m

vgo list -m  
github.com/you/hello

$ vgo list -t rsc.io/sampler

$ vgo list -t rsc.io/sampler
flag provided but not defined: -t
usage: list [-f format] [-json] [-m] [list flags] [build flags] [packages]
Run 'go help list' for details.

This used to work (tried with a past version, 6a94eb3 for instance)

[myitcv]

@bench these commands have changed somewhat since Russ posted his articles on vgo.

Per https://go-review.googlesource.com/c/vgo/+/120198, vgo list -m is now vgo list -m all

Per #25656 (comment), vgo list -t appears to be currently broken, but that issue also captures a number of other changes that Russ has planned for vgo list.

I'll close this issue for now because I think both points are covered but please shout if that's not the case.

[bench]

@myitcv Thank you for replying fast. I will look forward Russ changes ! 👍