cmd/go: go list -json -m does not provide Replace.Path relative to current directory when using workspaces

[mlaventure]

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

$ go version
go version go1.18.5 linux/amd64

Does this issue reproduce with the latest release?

Yes

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

go env Output

$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/mlaventure/.cache/go-build"
GOENV="/home/mlaventure/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/mlaventure/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/mlaventure/go"
GOPRIVATE=""
GOPROXY="direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.18.5"
GCCGO="gccgo"
GOAMD64="v1"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/home/mlaventure/tmp/go/workspace/fubar/go.mod"
GOWORK="/home/mlaventure/tmp/go/workspace/go.work"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build500860194=/tmp/go-build -gno-record-gcc-switches"

What did you do?

Given a monorepo setup as follow:

~/tmp/go $ tree
.
├── foo
│   ├── foo.go
│   └── go.mod
└── workspace
    ├── fubar
    │   ├── go.mod
    │   └── main.go
    └── go.work

3 directories, 5 files

With the following go.work:

go 1.18

use ./fubar

replace github.com/foo/foo => ../foo

When getting the list of replaced modules, the .Replace.Path entry is given relative to the go.work file instead of relative to the current folder the command was invoked from. The command ran was the following:

~/tmp/go/workspace/fubar$ go list -json -m all

What did you expect to see?

Path being appropriately set to reflect the current directory

{
        "Path": "github.com/foo/foo",
        "Version": "v0.0.0-00010101000000-000000000000",
        "Replace": {
                "Path": "../../foo",
                "Dir": "/home/mlaventure/tmp/go/foo",
                "GoMod": "/home/mlaventure/tmp/go/foo/go.mod",
                "GoVersion": "1.18"
        },
        "Indirect": true,
        "Dir": "/home/mlaventure/tmp/go/foo",
        "GoMod": "/home/mlaventure/tmp/go/foo/go.mod",
        "GoVersion": "1.18"
}

What did you see instead?

{                                                 
        "Path": "github.com/foo/foo",                                                                                                                                                                                                                                                                                                                      
        "Version": "v0.0.0-00010101000000-000000000000",
        "Replace": {
                "Path": "../foo",
                "Dir": "/home/mlaventure/tmp/go/foo",
                "GoMod": "/home/mlaventure/tmp/go/foo/go.mod",
                "GoVersion": "1.18"
        },
        "Indirect": true,
        "Dir": "/home/mlaventure/tmp/go/foo",
        "GoMod": "/home/mlaventure/tmp/go/foo/go.mod",
        "GoVersion": "1.18"
}

[dmitshur]

CC @bcmills, @matloob.