local configs = require 'lspconfig/configs'
local util = require 'lspconfig/util'
local lsp = vim.lsp

local function reload_workspace(bufnr)
  bufnr = util.validate_bufnr(bufnr)
  lsp.buf_request(bufnr, 'rust-analyzer/reloadWorkspace', nil,
      function(err, _, result, _)
        if err then error(tostring(err)) end
        vim.notify("Cargo workspace reloaded")
      end)
end

configs.rust_analyzer = {
  default_config = {
    cmd = {"rust-analyzer"};
    filetypes = {"rust"};
    root_dir = function(fname)
      local cargo_metadata = vim.fn.system("cargo metadata --no-deps --format-version 1")
      local cargo_root = nil
      if vim.v.shell_error == 0 then
        cargo_root = vim.fn.json_decode(cargo_metadata)["workspace_root"]
      end
      return cargo_root or
        util.find_git_ancestor(fname) or
        util.root_pattern("rust-project.json")(fname) or
        util.root_pattern("Cargo.toml")(fname)
    end;
    settings = {
      ["rust-analyzer"] = {}
    };
  };
  commands = {
    CargoReload = {
      function()
        reload_workspace(0)
      end;
      description = "Reload current cargo workspace"
    }
  };
  docs = {
    package_json = "https://raw.githubusercontent.com/rust-analyzer/rust-analyzer/master/editors/code/package.json";
    description = [[
https://github.com/rust-analyzer/rust-analyzer

rust-analyzer (aka rls 2.0), a language server for Rust

See [docs](https://github.com/rust-analyzer/rust-analyzer/tree/master/docs/user#settings) for extra settings.
    ]];
    default_config = {
      root_dir = [[root_pattern("Cargo.toml", "rust-project.json")]];
    };
  };
};

configs.rust_analyzer.reload_workspace = reload_workspace
-- vim:et ts=2 sw=2