Coc.nvim: Help with gopls

[lanox]

Hi

I am not sure if this is a issue or maybe just me not knowing how to configure it, I am using go1.12.1 darwin/amd64.

I am trying to configure gopls in coc-settings.json

    "golang": {
      "command": "gopls",
      "rootPatterns": ["go.mod", ".vim/", ".git/", ".hg/"],
      "filetypes": ["go"]
    }

I have also install gopls as per this instructions, https://github.com/golang/go/wiki/gopls
go get -u golang.org/x/tools/cmd/gopls

however autocompletion is not working, If i change it to go-langserver it's working fine.

if you could assist would be greatly appreciated.

[chemzqm]

It looks like you need to pass extra arguments to the command, but I'm not sure.

[lanox]

2019/04/08 13:23:57 get package failed: no packages found for /Users/xx/code/go/src/github.com/lanox/lanox.go
2019/04/08 13:23:58 get token failed: no packages found for /Users/xx/code/go/src/github.com/lanox/lanox.go

adding under gopls in coc-settings.json "args": ["-logfile=lano.log"], I get above error messages

[glepnir]

@lanox try this

git clone -b bingo https://github.com/saibing/tools.git
cd tools/cmd/gopls
go install

[lanox]

@taigacute tried that as well, no luck, that was the first thing I did.

After digging more through it, it seems that only works if you are in your GOPATH.
e.g
if I am in my $HOME, and I do vi lanox.go autocompletion will not work.

If I am navigate to my $GOPATH and do same as above, autocompletion works, although I don't get any documentation on floating window like I do with go-langserver.

[glepnir]

@lanox it surpport go mod project you should go mod init

[glepnir]

I don't get any documentation on floating window like I do with go-langserver.

this is a question i said to @chemzqm . the dohover of gopls works well on vscode. but didnt work with coc

[chemzqm]

the dohover of gopls works well on vscode. but didnt work with coc

Need output of language server https://github.com/neoclide/coc.nvim/wiki/Debug-language-server#using-output-channel

[lanox]

I am little confused with gopls, if I open my existing project it seems that autocompletion works, however if I start new project and start typing code, autocompletion will not work.

[glepnir]

@lanox if your project is a go mod pro you should go mod init first，Known issue, unsaved buffer import third party package auto completion is not working, waiting to be repaired，Gopls are unstable and have many problems.

[lanox]

@taigacute that is the interesting part, it is not this is just a normal folder with a .go file in it.

[chemzqm]

It might requires a correct workspaceFolder to work ,check out https://github.com/neoclide/coc.nvim/wiki/Using-workspaceFolders

[lanox]

ah, I am giving up on gopls, its just pain, and random.

[alzedd]

    "languageserver": {
        "golang": {
            "command": "gopls",
            "filetypes": ["go"],
        }
    }

this is my settings for gopls.

1. be sure to have $GOPATH correctly set
2. use go-modules (You will get an error code 0 otherwise)
3. the go file must exsist, you can't just open a new buffer (eg :e newfile.go)

EDIT: try using https://github.com/saibing/tools (it's just gopls with some edits the bingo developer did on the code)

[Cluas]

https://github.com/golang/go/issues/29202

[lanox]

Has anyone had any luck setting up any of GO language servers. I cant seem to get auto completion working for gopls or go-langserver. Can someone please help me out, or help me troubleshoot it.

[glepnir]

works well

[akinsho]

I managed to get it working with @alzedd's advice but it doesn't show any completion till you hit . so in my case for the screenshot above log wouldn't be in the autocompletion only log.F would give options

[glepnir]

@Akin909 i use my config not @alzedd 's advice.

[lanox]

It seems to be working okay for me, however no floating windows, but I think that is due to gopls issue.

@taigacute to be honest with you screenshot you are showing only snippets, at least when I looked at you config you had stars if the definition is coming from snippets.

[glepnir]

@lanox not snippets. do you see the [ls] that mean the completion from server

[lanox]

Yep I agree, i did not see that, however I did see in your config that your snippets also have stars, so I just assumed. Never assume I guess.

[luan]

@lanox did you get it working with upstream gopls? It'd be great if coc.nvim didn't depend on the fork. Installing from the fork is a pain and it breaks all sorts of things with golang.org/x/tools

[lanox]

@luan no not really, its sporadic, but I haven't tried it in a while.

[ucef29]

@lanox workAround: add the full path to your gopls in the cocConfig json... here:

{
  "languageserver": {
    "golang": {
      "command": "[full-path-to-your-gopls-binary]/gopls",
      "rootPatterns": ["go.mod", ".vim/", ".git/", ".hg/"],
      "filetypes": ["go"]
    }
  }
}

[LuisPe]

Thanks @ucef29 your suggestion "command": "[full-path-to-your-gopls-binary]/gopls" it works for me.
Than you very much 💯

[oblitum]

There's the coc-go extension too, which is even nicer and easier to use.