[coc.nvim] source rust-client timeout after 1000ms about coc-rls HOT 5 CLOSED

The server need sometime to initialize, checkout :h coc-status for statusline integration.

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Ok, it works(partially) but something is weird!
It show me functions and pop-up menu, but it can't catch errors and show them to me on statusbar.
A question, what is this:

"message":"linker `cc` not found","code
":null,"level":"error","spans":[],"children":[{"message":"No such file or directory (os error 2)","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error: linker `cc` not found\n  |\n  = note: No such file or directory (os error 2)\n\n"}

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@chemzqm: Can we set something like this in coc.nvim:
g:LanguageClient_serverCommands.rust = ['${"${rls}/bin/rls"}']
A user in #nixos channel said that he can setup rust toolchain correctly in nixos via:
https://github.com/autozimu/LanguageClient-neovim
But i don't know is there any option like this in coc.nvim.
Our conversation:
https://logs.nix.samueldr.com/nixos/2019-04-03#2094173;

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There're rust-client.rustupPath and rust-client.rlsPath settings.

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OK. finally i find the solution. Nixos users should use nix-shell or direnv for development. (No matter what language or toolkit you are using). I'll update the readme for this repo and send details as a PR.

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