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---@brief
---
--- https://github.com/golang/tools/tree/master/gopls
---
--- Google's lsp server for golang.
local mod_cache = nil
---@param fname string
---@return string?
local function get_root(fname)
if mod_cache and fname:sub(1, #mod_cache) == mod_cache then
local clients = vim.lsp.get_clients { name = 'gopls' }
if #clients > 0 then
return clients[#clients].config.root_dir
end
end
return vim.fs.root(fname, 'go.work') or vim.fs.root(fname, 'go.mod') or vim.fs.root(fname, '.git')
end
return {
cmd = { 'gopls' },
filetypes = { 'go', 'gomod', 'gowork', 'gotmpl' },
root_dir = function(bufnr, on_dir)
local fname = vim.api.nvim_buf_get_name(bufnr)
-- see: https://github.com/neovim/nvim-lspconfig/issues/804
if mod_cache then
on_dir(get_root(fname))
return
end
local cmd = { 'go', 'env', 'GOMODCACHE' }
vim.system(cmd, { text = true }, function(output)
if output.code == 0 then
if output.stdout then
mod_cache = vim.trim(output.stdout)
end
on_dir(get_root(fname))
else
vim.schedule(function()
vim.notify(('[gopls] cmd failed with code %d: %s\n%s'):format(output.code, cmd, output.stderr))
end)
end
end)
end,
}
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