x/tools/gopls: view updates in go.mod when mod=vendor

[ebati]

What did you do?

I just noticed updates are shown as codelens in go.mod. With go 1.14 if there is a vendor folder and go.mod file have specified go 1.14 then -mod=vendor is used automatically. This behaviour makes go list -m -u all fails, which also prevents codelens.

I think -mod=readonly can be added to here as an argument.

What did you expect to see?

Updates as codelens

What did you see instead?

Nothing

Build info

golang.org/x/tools/gopls 0.4.0
    golang.org/x/tools/gopls@v0.4.0 h1:G4+YP9kaV4dJb79J5MobyApxX493Qa6VoiTceUmxqik=
    github.com/BurntSushi/toml@v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
    github.com/sergi/go-diff@v1.1.0 h1:we8PVUC3FE2uYfodKH/nBHMSetSfHDR6scGdBi+erh0=
    golang.org/x/mod@v0.2.0 h1:KU7oHjnv3XNWfa5COkzUifxZmxp1TyI7ImMXqFxLwvQ=
    golang.org/x/sync@v0.0.0-20190911185100-cd5d95a43a6e h1:vcxGaoTs7kV8m5Np9uUNQin4BrLOthgV7252N8V+FwY=
    golang.org/x/tools@v0.0.0-20200407041343-bf15fae40dea h1:DUwLyMDMUauGMd9kSLIlhhYJNELm06HuxeBdkFkeax4=
    golang.org/x/xerrors@v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
    honnef.co/go/tools@v0.0.1-2020.1.3 h1:sXmLre5bzIR6ypkjXCDI3jHPssRhc8KD/Ome589sc3U=
    mvdan.cc/xurls/v2@v2.1.0 h1:KaMb5GLhlcSX+e+qhbRJODnUUBvlw01jt4yrjFIHAuA=

Go info

go version go1.14.2 darwin/amd64

[gopherbot]

Thank you for filing a gopls issue! Please take a look at the Troubleshooting guide, and make sure that you have provided all of the relevant information here.

[gopherbot]

Change https://golang.org/cl/232477 mentions this issue: internal/lsp/cache: show update codelens in go.mod when -mod=vendor

[gopherbot]

Change https://golang.org/cl/311909 mentions this issue: internal/lsp: support Check For Upgrades in vendor mode