Coc.nvim: CocAction('codeLens') => Source id of codelens not found

Created on 24 Nov 2018 · 3Comments · Source: neoclide/coc.nvim

Describe the bug
:call CocAction('codeLens') displays an error message [coc.nvim] Source id of codelens not found"

To Reproduce
~/.config/nvim/coc-settings.json:

{
  "languageserver": {
    "ccls": {
      "command": "ccls",
      "filetypes": ["c", "cpp", "objc", "objcpp"]
    }
  }
}

cd /tmp/d; git init
echo 'int a;' > a.cc
nvim a.cc
Execute :call CocAction('codeLens')

Expected behavior
textDocument/codeLen result is rendered somewhere

Additional context

sysdig -As9999 --unbuffered -p '%evt.buffer' "proc.exe contains ccls and fd.type=unix":

Content-Length: 113

{"jsonrpc":"2.0","id":16,"method":"textDocument/codeLens","params":{"textDocument":{"uri":"file:///tmp/d/a.cc"}}}

Content-Length: 239

{"jsonrpc":"2.0","id":16,"result":[{"range":{"start":{"line":0,"character":4},"end":{"line":0,"character":5}},"command":{"title":"0 ref","command":"ccls.xref","arguments":["{\"usr\":16721564935990383768,\"kind\":4,\"field\":\"uses\"}"]}}]}

Note it encodes a JSON string as the only element of "arguments" (to make VSCode happy):

"arguments":["{\"usr\":16721564935990383768,\"kind\":4,\"field\":\"uses\"}"]

/tmp/coc-nvim.log log entry:

2018-11-23T21:19:51.601 ERROR (pid:17076) [codelens] - Cannot read property 'command' of null

bug

Source

MaskRay

Most helpful comment

Coc will use set_virtual_text of neovim for codeLenes feature.

chemzqm on 24 Nov 2018

❤3

All 3 comments

The command not exists, an extension could help to regist custom command.

chemzqm on 24 Nov 2018

Does it make sense to postpone the error reporting to when the user actually clicks the button (tricks the command)?

My supposed interaction is:

User invokes textDocument/codeLens
Server returns:

{"jsonrpc":"2.0","id":16,"result":[{"range":{"start":{"line":0,"character":4},"end":{"line":0,"character":5}},"command":{"title":"0 ref","command":"ccls.xref","arguments":["{\"usr\":16721564935990383768,\"kind\":4,\"field\":\"uses\"}"]}}]}

range and command.title are rendered even if the server does not know the actual command. In this particular case, "title": "0 ref" means the declaration has 0 references. The title is more important than whether the command is rendered as a clickable button.
User clicks the 0 refs button (code lens). As there is no extension to handle the command ccls.xref, coc.nvim can bail out and print an error message in this step, instead of sending

{"title":"0 ref","command":"ccls.xref","arguments":["{\"usr\":16721564935990383768,\"kind\":4,\"field\":\"uses\"}"]}

Here is how CodeLens is rendered in vscode-ccls. These "* refs" are clickable buttons, but whether they are clickable does not matter too much. coc.nvim can print an error message as the command is not supported by an extension.