From b6544120a820700785ef0d05b462df2e4bb17c53 Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Tue, 5 Mar 2019 16:21:47 +0100
Subject: Test simpler setup using vim-lsp

Feels less distracting and faster. I don't actually want to turn this
vim setup into a always active intellisense-like experience but rather
have code introspection quickly available if I actually need it.
---
 pkgs/custom-neovim/asset/rc.vim | 40 ++++++++++++++++++++++------------------
 pkgs/custom-neovim/default.nix  |  4 +---
 pkgs/custom-neovim/plugins.nix  | 18 ++++++++++++++++++
 3 files changed, 41 insertions(+), 21 deletions(-)

diff --git a/pkgs/custom-neovim/asset/rc.vim b/pkgs/custom-neovim/asset/rc.vim
index 822ac87..202b1ad 100644
--- a/pkgs/custom-neovim/asset/rc.vim
+++ b/pkgs/custom-neovim/asset/rc.vim
@@ -126,25 +126,29 @@ let g:localvimrc_persistent = 2
 let g:wordmotion_prefix = '<Leader>'
 nmap <S-w> <Leader>w
 
+let g:lsp_auto_enable = 0
+
 " spinning up a language client only makes
 " sense if such a client is available
 if executable('cquery')
-	let g:LanguageClient_serverCommands = { 'cpp': [ 'cquery' ] }
-	let g:LanguageClient_hoverPreview = "Never"
-
-	set completefunc=LanguageClient#complete
-	set completeopt-=preview
-
-	inoremap <C-n> <C-x><C-o>
-	" allow completion selection via CR without inserting a new line
-	imap <expr><CR> pumvisible() ? "\<C-y>" : "\<CR>"
-
-	noremap <leader>lc   :call LanguageClient_contextMenu()<CR>
-	noremap <leader>lr   :call LanguageClient_rename()<CR>
-	nnoremap <silent> gd :call LanguageClient#textDocument_definition()<CR>
-	nnoremap <silent> gt :call LanguageClient#textDocument_typeDefinition()<CR>
-	nnoremap <silent> gi :call LanguageClient#textDocument_implementation()<CR>
-
-	nmap <c-t> :Denite workspaceSymbol<CR>
-	nmap <a-t> :Denite documentSymbol<CR>
+	let g:lsp_auto_enable = 1
+
+	autocmd User lsp_setup call lsp#register_server({
+		\ 'name': 'cquery',
+		\ 'cmd': {server_info->['cquery']},
+		\ 'root_uri': {server_info->lsp#utils#path_to_uri(lsp#utils#find_nearest_parent_file_directory(lsp#utils#get_buffer_path(), 'compile_commands.json'))},
+		\ 'initialization_options': { 'cacheDirectory': '/tmp/cquery' },
+		\ 'whitelist': ['c', 'cpp', 'cc'],
+		\ })
+
+	nnoremap <silent> gd :LspDefinition<CR>
+	nnoremap <silent> gt :LspTypeDefinition<CR>
+	nnoremap <silent> gi :LspImplementation<CR>
+	nnoremap <silent> gr :LspReferences<CR>
+
+	nmap <c-t> :LspWorkspaceSymbol<CR>
+	nmap <a-t> :LspDocumentSymbol<CR>
+
+	autocmd FileType cpp setlocal omnifunc=lsp#complete
+	inoremap <C-m> <C-x><C-o>
 endif
diff --git a/pkgs/custom-neovim/default.nix b/pkgs/custom-neovim/default.nix
index ca1fc75..1dff1f7 100644
--- a/pkgs/custom-neovim/default.nix
+++ b/pkgs/custom-neovim/default.nix
@@ -17,9 +17,7 @@ in pkgs.neovim.override {
       # autocomplete
         fzfWrapper
         fzf-vim
-        LanguageClient-neovim
-        deoplete-nvim
-        denite
+        async vim-lsp
 
       # load project specific config
         vim-localvimrc
diff --git a/pkgs/custom-neovim/plugins.nix b/pkgs/custom-neovim/plugins.nix
index 9ff92f2..5e0f6ea 100644
--- a/pkgs/custom-neovim/plugins.nix
+++ b/pkgs/custom-neovim/plugins.nix
@@ -76,6 +76,24 @@ in {
     };
   };
 
+  vim-lsp = buildVimPlugin {
+    name = "vim-lsp";
+    src = fetchgit {
+      url    = "https://github.com/prabirshrestha/vim-lsp.git";
+      rev    = "0310241af11adc6c3a7ba93955bc27b15744c957";
+      sha256 = "0ccd6is75qlk8mg9wpwp1ypq68p7lgbq1c1jbpr6pwr59s53r4lx";
+    };
+  };
+
+  async = buildVimPlugin {
+    name = "async";
+    src = fetchgit {
+      url    = "https://github.com/prabirshrestha/async.vim.git";
+      rev    = "f3014550d7a799097e56b094104dd2cd66cf2612";
+      sha256 = "0zn25qwycynagrij5rsp1x7kbfz612gn7xda0hvm4y7qr3pal77p";
+    };
+  };
+
   vim-color-akr = buildVimPlugin {
     name = "vim-color-akr";
     src  = ./asset/vim-color-akr;
-- 
cgit v1.2.3