gopls code completion doesn't work in module mode when the current working directory is at or below a module root

[thekvs]

What did you do?

Issue described here: microsoft/vscode-go#2490
vim-go also has it.

What did you expect to happen?

Working code completion with gopls in multi-language project.

What happened instead?

Code completion only works when I start vim session from the folder with go.mod/go.sum files.

Configuration:

• vim-go version: 2c1a85b

• vimrc you used to reproduce:

call plug#begin('~/.vim/plugged')
Plug 'fatih/vim-go'
call plug#end()

let g:go_bin_path=$HOME."/.local/bin"
let g:go_def_mode='gopls'
let g:go_info_mode='gopls'

• Vim version (first three lines from :version):

VIM - Vi IMproved 8.1 (2018 May 18, compiled Apr 30 2019 09:57:35)
Included patches: 1-1239
Modified by [email protected]

• Go version (go version): go version go1.11.5 linux/amd64

• Go environment (go env):

GOARCH="amd64"
GOBIN=""
GOCACHE="/mnt/disk2/home/kvs/.cache/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/mnt/disk2/home/kvs/work/devel/gocode"
GOPROXY=""
GORACE=""
GOROOT="/opt/go"
GOTMPDIR=""
GOTOOLDIR="/opt/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD=""
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-build929123903=/tmp/go-build -gno-record-gcc-switches"

[bhcleek]

This is working as intended for now. When you open the first Go file, your working directory should be either within $GOPATH or in a Go module directory. You can make sure that's the case by doing cd or lcd to change to your Go module's directory before opening a Go file.

This may change in the future; I'm considering making it so that each tab in Vim can use its own gopls server and probably autodetect the module directory when in module mode.