[nvim] add niceties for rust

private_dot_config/nvim/init.vim.tmpl

@@ -29,6 +29,9 @@ call minpac#add('vim-syntastic/syntastic')
     call minpac#add('majutsushi/tagbar')
     call minpac#add('Shougo/deoplete.nvim')
     call minpac#add('racer-rust/vim-racer')
+    call minpac#add('neomake/neomake')
+    call minpac#add('ervandew/supertab')
+    call minpac#add('dense-analysis/ale')
 
 command! PackUpdate call minpac#update()
 command! PackClean call minpac#clean()
@@ -69,6 +72,7 @@ set expandtab
 set tabstop=4
 set shiftwidth=4
 set softtabstop=4
+set pastetoggle=<F2>
 "set formatoptions=tcrqn2w
 "set formatlistpat=^\\s*[\\d\\*-]\\+[\\]:.)}\\t\ ]\\s*
 
@@ -181,3 +185,32 @@ let g:syntastic_always_populate_loc_list = 1
 let g:syntastic_auto_loc_list = 1
 let g:syntastic_check_on_open = 1
 let g:syntastic_check_on_wq = 0
+
+" Racer
+augroup Racer
+    autocmd!
+    autocmd FileType rust nmap <buffer> gd         <Plug>(rust-def)
+    autocmd FileType rust nmap <buffer> gs         <Plug>(rust-def-split)
+    autocmd FileType rust nmap <buffer> gx         <Plug>(rust-def-vertical)
+    autocmd FileType rust nmap <buffer> gt         <Plug>(rust-def-tab)
+    autocmd FileType rust nmap <buffer> <leader>gd <Plug>(rust-doc)
+    autocmd FileType rust nmap <buffer> <leader>gD <Plug>(rust-doc-tab)
+augroup END
+
+" rust https://dev.to/drmason13/configure-neovim-for-rust-development-1fjn
+" setup rust_analyzer LSP (IDE features)
+"lua require'nvim_lsp'.rust_analyzer.setup{}
+
+" Use LSP omni-completion in Rust files
+"autocmd Filetype rust setlocal omnifunc=v:lua.vim.lsp.omnifunc
+
+" Enable deoplete autocompletion in Rust files
+let g:deoplete#enable_at_startup = 1
+
+" Press Tab to scroll _down_ a list of auto-completions
+let g:SuperTabDefaultCompletionType = "<c-n>"
+
+" ale rust-analyser
+let g:ale_linters = {'rust': ['analyzer']}
+
+nnoremap <leader>c :!cargo clippy