speed up :LspInstall, :LspUninstall, :LspUninstallAll commands (#175)

- `:LspUninstallAll` now just nukes the entire install directory immediately,
  instead of uninstalling each server one by one. There's also a confirmation
  prompt now.
- `:LspInstall` & `:LspUninstall` now sources its autocompletion directly from
  a Lua table, instead of sourcing the server names from each server module (thus
  avoiding unnecessary `require` calls).

1 files changed, 2 insertions, 6 deletions

diff --git a/plugin/nvim-lsp-installer.vim b/plugin/nvim-lsp-installer.vim
index 2cd3485b..3050d865 100644
--- a/plugin/nvim-lsp-installer.vim
+++ b/plugin/nvim-lsp-installer.vim
@@ -4,16 +4,12 @@ let g:loaded_nvim_lsp_installer = v:true
 let s:save_cpo = &cpo
 set cpo&vim
 
-function! s:MapServerName(servers) abort
-    return map(a:servers, {_, val -> val.name})
-endfunction
-
 function! s:LspInstallCompletion(...) abort
-    return join(sort(s:MapServerName(luaeval("require'nvim-lsp-installer.servers'.get_available_servers()"))), "\n")
+    return join(luaeval("require'nvim-lsp-installer.servers'.get_available_server_names()"), "\n")
 endfunction
 
 function! s:LspUninstallCompletion(...) abort
-    return join(sort(s:MapServerName(luaeval("require'nvim-lsp-installer.servers'.get_installed_servers()"))), "\n")
+    return join(luaeval("require'nvim-lsp-installer.servers'.get_installed_server_names()"), "\n")
 endfunction
 
 function! s:LspInstall(server_names) abort