feat: working + clean linter/fixer/completion/LSP

4 files changed, 63 insertions, 96 deletions

diff --git a/README.md b/README.md
index 06617f7..8b532c1 100644
--- a/README.md
+++ b/README.md
@@ -33,8 +33,7 @@ files with git.
 
 ### LSP
 
-- [CoC](https://github.com/neoclide/coc.nvim) a LSP plugin that work like VsCode
-LSP, and in Node (yeah I don't like it too but no choice...).
+- [ALE](https://github.com/dense-analysis) linters, fixers, completion & LSP
 
 ## Command & keybinds
 
@@ -109,9 +108,9 @@ Keybinds:
 
 Hunks are the difference between your file and the git file.
 
-### Coc (Linter, Formatter, Snippets)
+### ALE (Linter, fixers, completion, LSP)
 
-For help, use `:help coc`.  
+For help, use `:help ALE`.  
 Key binds:
 
 - `<leader>gd` go to the definition,
@@ -126,41 +125,29 @@ Key binds:
 
 ## Snippets
 
-To have snippets autocompletion, I use Coc snippets settings.
-The `install.sh` script add the `coc-settings.json` file to the right place for
-having all snippets filepath configured.
+TODO in ALE
 
-Moreover, you'll need to install in vim a Coc Extension:
+## Linters / fixers & LSP
 
-```vim
-:CocInstall coc-snippets
-```
+Linters and fixers needed to be installed for each language used.  
 
-## Linters & fixers
+### Python
 
-The following table shows the extensions I use for linting.  
-You can install them with 
+For python, you need to have [python-lsp-server](https://github.com/python-lsp/python-lsp-server).  
+  
+It can be system wide, or just in a virtualenv.  
 
-```vim
-:CocInstall <extension>
+```bash
+python3 -m venv .venv
+source .venv/bin/activate
+pip install pyton-lsp-server[all]
 ```
 
-| Language   | Coc Extension    |
-|:----------:|:----------------:|
-| JSON       | coc-json         |
-| Markdown   | coc-markdownlint |
-| PHP        | coc-phpls        |
-| HTML       | coc-html         |
-| CSS        | coc-css          |
-| Javascript | coc-tsserver     |
-
 ## Formatter
 
-By default my `coc-settings.json` add autoformatting on save on each filetype,
-you just need a LSP server for the filetype.
-
-But if it's not working you could use vim formatting `ggvG=`, `=` is vim command
-for formatting text.
+By default my config add autoformatting on save on each filetype, you just need a LSP server for the filetype.  
+  
+But if it's not working you could use vim formatting `ggvG=`, `=` is vim command for formatting text.  
 
 ## VM
 
diff --git a/coc-settings.json b/coc-settings.json
deleted file mode 100644
index f9bb1a8..0000000
--- a/coc-settings.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-	"snippets.userSnippetsDirectory": "~/.config/vim/snippets",
-	"snippets.ultisnips.directories": [
-		"~/.config/vim/snippets"
-	],
-	"snippets.textmateSnippetsRoots": [
-		"~/.config/vim/snippets"
-	],
-	"coc.preferences.formatOnSaveFiletypes": [
-		"*"
-	]
-}
diff --git a/conf/keymaps.vim b/conf/keymaps.vim
index 066dd21..351520d 100644
--- a/conf/keymaps.vim
+++ b/conf/keymaps.vim
@@ -145,46 +145,3 @@ noremap <leader>sa zg
 
 " show the list of alternatives for the word
 noremap <leader>s? z=
-
-"""""""""""""""""""
-" LSP
-"""""""""""""""""""
-inoremap <expr><S-TAB> coc#pum#visible() ? coc#pum#prev(1) : "\<C-h>"
-
-" Make <CR> to accept selected completion item or notify coc.nvim to format
-" <C-g>u breaks current undo, please make your own choice
-inoremap <silent><expr> <cr> pumvisible() ? coc#_select_confirm() : 
-                                           \"\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"
-let g:coc_snippet_next = '<tab>'
-
-nmap <silent> gp <Plug>(coc-diagnostic-prev)
-nmap <silent> gn <Plug>(coc-diagnostic-next)
-
-" GoTo code navigation
-nmap <silent> gd <Plug>(coc-definition)
-nmap <silent> gy <Plug>(coc-type-definition)
-nmap <silent> gi <Plug>(coc-implementation)
-nmap <silent> gr <Plug>(coc-references)
-
-" Use K to show documentation in preview window
-nnoremap <silent> gh :call ShowDocumentation()<CR>
-
-function! ShowDocumentation()
-  if CocAction('hasProvider', 'hover')
-    call CocActionAsync('doHover')
-  else
-    call feedkeys('K', 'in')
-  endif
-endfunction
-
-" Highlight the symbol and its references when holding the cursor
-autocmd CursorHold * silent call CocActionAsync('highlight')
-
-" Symbol renaming
-nmap <leader>gR <Plug>(coc-rename)
-
-" Formatting selected code
-xmap <leader>gf  <Plug>(coc-format-selected)
-nmap <leader>gf  <Plug>(coc-format-selected)
-
-nmap <leader>qf  <Plug>(coc-fix-current)
diff --git a/conf/plugins.vim b/conf/plugins.vim
index 89ca4c3..bdfa5ea 100644
--- a/conf/plugins.vim
+++ b/conf/plugins.vim
@@ -22,7 +22,7 @@ Plug 'liuchengxu/vim-which-key' " Show leader mapping cheatsheet
 Plug 'airblade/vim-gitgutter' " Git diff
 
 " Autocompletion, linter, syntax
-Plug 'neoclide/coc.nvim', {'branch': 'release'}
+Plug 'dense-analysis/ale'
 
 " Tools
 Plug 'ap/vim-css-color' " rgb, hex color preview
@@ -35,7 +35,25 @@ filetype plugin indent on " Allow filetype detection, plugins, indentation
 "	Configuration
 """""""""""""""""""""""""
 " LSP
-let g:coc_global_extensions = ['coc-json', 'coc-markdownlint'] " You can add other coc extensions here
+let g:ale_python_auto_virtualenv = 1
+let g:ale_completion_enabled = 1
+let g:ale_floating_preview = 1 " Show hover doc & detail in a popup
+let g:ale_fix_on_save = 1
+
+" Stop linting when writing
+let g:ale_lint_on_text_changed = 'never'
+let g:ale_lint_on_insert_leave = 0
+let g:ale_hover_cursor = 1
+let g:ale_set_balloons = 1 " Show error when mouse over it
+
+" Linters and fixers (don't forget to setup LSP as linters)
+let g:ale_linters = {
+\   'python': ['pylsp', 'flake8', 'pylint', 'mypy']
+\}
+
+let g:ale_fixers = {
+\   'python': ['black', 'isort', 'autopep8']
+\}
 
 " Netrw (filetree built-in vim)
 let g:netrw_keepdir = 0 " Reload buffer usefull when moving or removing file
@@ -54,6 +72,21 @@ let g:currentmode={
 	\ 'Rv' : 'V·Replace ',
 	\ 'c'  : 'Command ',
 	\}
+
+" Getting numbers of errors in ALE
+function! LinterStatus() abort
+    let l:counts = ale#statusline#Count(bufnr(''))
+
+    let l:all_errors = l:counts.error + l:counts.style_error
+    let l:all_non_errors = l:counts.total - l:all_errors
+
+    return l:counts.total == 0 ? 'OK' : printf(
+    \   '%dW %dE',
+    \   all_non_errors,
+    \   all_errors
+    \)
+
+endfunction
 set laststatus=2
 set statusline=
 " VIM Mode
@@ -66,6 +99,7 @@ set statusline+=%{&readonly?'\ ':''}
 set statusline+=%=%y
 set statusline+=\ \|\ %{&fileencoding?&fileencoding:&encoding}
 set statusline+=\ \|\ [%{&fileformat}\]
+set statusline+=\ \|\ %{LinterStatus()}
 " Line count and percentage
 set statusline+=\ \|\ %l:%c
 set statusline+=\ [%p%%]\ 
@@ -119,15 +153,16 @@ let g:which_key_map.h = {
     \ }
 
 " LSP key help
+" Activer WhichKey pour ALE
 let g:which_key_map.g = { 
     \ 'name' : '+LSP',
-    \ 'd' : 'go to definition',
-    \ 'n' : 'next diagnostic',
-    \ 'p' : 'previous diagnostic',
-    \ 'r' : 'go to reference',
-    \ 'R' : 'rename object',
-	\ 'y' : 'type definition',
-	\ 'i' : 'go to implementation',
-	\ 'h' : 'documentation',
-	\ 'f' : 'format document',
+    \ 'd' : [':ALEGoToDefinition', 'go to definition'],
+    \ 'n' : [':ALENext', 'next diagnostic'],
+    \ 'p' : [':ALEPrevious', 'previous diagnostic'],
+    \ 'r' : [':ALEFindReferences', 'go to reference'],
+    \ 'R' : [':ALERename', 'rename object'],
+    \ 'y' : [':ALEType', 'type definition'],
+    \ 'i' : [':ALEGoToImplementation', 'go to implementation'],
+    \ 'h' : [':ALEHover', 'documentation'],
+    \ 'f' : [':ALEFix', 'format document'],
     \ }