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|
---@brief
---
--- https://github.com/rust-lang/rust-analyzer
---
--- rust-analyzer (aka rls 2.0), a language server for Rust
---
---
--- See [docs](https://rust-analyzer.github.io/book/configuration.html) for extra settings. The settings can be used like this:
--- ```lua
--- vim.lsp.config('rust_analyzer', {
--- settings = {
--- ['rust-analyzer'] = {
--- diagnostics = {
--- enable = false;
--- }
--- }
--- }
--- })
--- ```
---
--- Note: do not set `init_options` for this LS config, it will be automatically populated by the contents of settings["rust-analyzer"] per
--- https://github.com/rust-lang/rust-analyzer/blob/eb5da56d839ae0a9e9f50774fa3eb78eb0964550/docs/dev/lsp-extensions.md?plain=1#L26.
local function reload_workspace(bufnr)
local clients = vim.lsp.get_clients { bufnr = bufnr, name = 'rust_analyzer' }
for _, client in ipairs(clients) do
vim.notify 'Reloading Cargo Workspace'
---@diagnostic disable-next-line:param-type-mismatch
client:request('rust-analyzer/reloadWorkspace', nil, function(err)
if err then
error(tostring(err))
end
vim.notify 'Cargo workspace reloaded'
end, 0)
end
end
local function is_library(fname)
local user_home = vim.fs.normalize(vim.env.HOME)
local cargo_home = os.getenv 'CARGO_HOME' or user_home .. '/.cargo'
local registry = cargo_home .. '/registry/src'
local git_registry = cargo_home .. '/git/checkouts'
local rustup_home = os.getenv 'RUSTUP_HOME' or user_home .. '/.rustup'
local toolchains = rustup_home .. '/toolchains'
for _, item in ipairs { toolchains, registry, git_registry } do
if vim.fs.relpath(item, fname) then
local clients = vim.lsp.get_clients { name = 'rust_analyzer' }
return #clients > 0 and clients[#clients].config.root_dir or nil
end
end
end
---@type vim.lsp.Config
return {
cmd = { 'rust-analyzer' },
filetypes = { 'rust' },
root_dir = function(bufnr, on_dir)
local fname = vim.api.nvim_buf_get_name(bufnr)
local reused_dir = is_library(fname)
if reused_dir then
on_dir(reused_dir)
return
end
local cargo_crate_dir = vim.fs.root(fname, { 'Cargo.toml' })
local cargo_workspace_root
if cargo_crate_dir == nil then
on_dir(
vim.fs.root(fname, { 'rust-project.json' })
or vim.fs.dirname(vim.fs.find('.git', { path = fname, upward = true })[1])
)
return
end
local cmd = {
'cargo',
'metadata',
'--no-deps',
'--format-version',
'1',
'--manifest-path',
cargo_crate_dir .. '/Cargo.toml',
}
vim.system(cmd, { text = true }, function(output)
if output.code == 0 then
if output.stdout then
local result = vim.json.decode(output.stdout)
if result['workspace_root'] then
cargo_workspace_root = vim.fs.normalize(result['workspace_root'])
end
end
on_dir(cargo_workspace_root or cargo_crate_dir)
else
vim.schedule(function()
vim.notify(('[rust_analyzer] cmd failed with code %d: %s\n%s'):format(output.code, cmd, output.stderr))
end)
end
end)
end,
capabilities = {
experimental = {
serverStatusNotification = true,
},
},
before_init = function(init_params, config)
-- See https://github.com/rust-lang/rust-analyzer/blob/eb5da56d839ae0a9e9f50774fa3eb78eb0964550/docs/dev/lsp-extensions.md?plain=1#L26
if config.settings and config.settings['rust-analyzer'] then
init_params.initializationOptions = config.settings['rust-analyzer']
end
end,
on_attach = function(_, bufnr)
vim.api.nvim_buf_create_user_command(bufnr, 'LspCargoReload', function()
reload_workspace(bufnr)
end, { desc = 'Reload current cargo workspace' })
end,
}
|