Move lang config in ftplugin to load automatically

.vim/ale.vim

@@ -1,11 +1,9 @@
-let g:ale_linters = {}
 let g:ale_completion_enabled = 1
 let g:ale_sign_error = "✗"
 let g:ale_sign_warning = "⚠"
 
-" Rust linting options
-let g:ale_rust_cargo_use_clippy = 1 " installed with `rustup component add clippy-preview`
-let g:rustfmt_autosave = 1 " installed with `rustup component add rustfmt`
+" Enable warnings about trailing whitespace for all files.
+let b:ale_warn_about_trailing_whitespace = 1
 
 " ALE colors
 highlight ALEWarning ctermbg=Yellow

.vim/ftplugin/python.vim

@@ -1,12 +1,22 @@
+set tabstop=4
+set softtabstop=4
+set shiftwidth=4
+set textwidth=79
+set expandtab
+set autoindent
+set fileformat=unix
+set number
+
 " Enable folding on indent
 set foldmethod=indent
 set foldlevel=99
 
-au BufNewFile,BufRead *.py
-    \ set tabstop=4
-    \ set softtabstop=4
-    \ set shiftwidth=4
-    \ set textwidth=79
-    \ set expandtab
-    \ set autoindent
-    \ set fileformat=unix
+" Lint and check types
+let b:ale_linters = ['mypy', 'pyls', 'pylint']
+let g:ale_lint_on_save = 1
+let g:ale_list_window_size = 20
+" Fix syntax with autopep8.
+let b:ale_fixers = ['autopep8']
+let g:ale_fix_on_save = 1
+" Use .venv as a global default
+let g:ale_virtualenv_dir_names = ['.venv']

.vim/ftplugin/rust.vim

@@ -3,3 +3,7 @@ nmap gs <Plug>(rust-def-split)
 nmap gx <Plug>(rust-def-vertical)
 nmap <leader>gd <Plug>(rust-doc)
 set  number
+
+" linting options
+let g:ale_rust_cargo_use_clippy = 1 " installed with `rustup component add clippy-preview`
+let g:rustfmt_autosave = 1 " installed with `rustup component add rustfmt`