nvim: Update Python related configuration

nvim/.config/nvim/after/ftplugin/python.vim

@@ -1 +1,6 @@
 setlocal textwidth=0
+setlocal formatprg=black\ -q\ -
+
+nnoremap <buffer> <silent> gq ggVGgq<C-o><C-o>
+
+autocmd! BufWritePost <buffer> lua require('lint').try_lint()

nvim/.config/nvim/after/plugin/nvim-lint.lua

@@ -1,13 +1,17 @@
+local nvim_lint = require 'lint'
+
 vim.api.nvim_set_keymap('n', '<LocalLeader>l', ':lua require(\'lint\').try_lint()<CR>', { noremap = true, unique = true })
 
-require('lint').linters_by_ft = {
+nvim_lint.linters_by_ft = {
   haskell    = { 'hlint' },
   javascript = { 'eslint' },
   lua        = { 'luacheck' },
   markdown   = { 'vale' },
   pandoc     = { 'vale' },
-  python     = { 'flake8', 'mypy', 'pycodestyle', 'pylint' },
+  python     = { 'pylint', 'mypy', 'flake8' },
   sh         = { 'shellcheck' },
   typescript = { 'eslint' },
   text       = { 'vale' },
 }
+
+nvim_lint.linters.flake8.args = { '--ignore', 'E133,E501,W503' }

nvim/.config/nvim/lua/lsp.lua

@@ -70,6 +70,29 @@ local ts_utils_setup = function(client, bufnr, opts)
   end
 end
 
+-- Pyright isn't usable for GLib/PyGObject based libraries. Both
+-- python-lsp-server and jedi-language-server which are based on Jedi and work
+-- for GStreamer/GLib etc. are extremely slow for Python files with 1000+
+-- lines. So we only enable completion, rename/hover and document highlight
+-- support. Jumping to definition takes seconds in large files, so we just
+-- rely on in-built support or perhaps that comes from treesitter.
+local on_attach_python = function(client, bufnr)
+  vim.api.nvim_buf_set_option(bufnr, 'omnifunc', 'v:lua.vim.lsp.omnifunc')
+  vim.lsp.set_log_level('warn')
+
+  if client.config.flags then
+    client.config.flags.allow_incremental_sync = true
+    client.config.flags.debounce_text_changes  = 500
+  end
+
+  local opts = { noremap=true, silent=true }
+  vim.api.nvim_buf_set_keymap(bufnr, 'n', 'gR',        '<cmd>lua vim.lsp.buf.rename()<CR>', opts)
+  vim.api.nvim_buf_set_keymap(bufnr, 'n', '<Leader>k', '<cmd>lua vim.lsp.buf.hover()<CR>' , opts)
+
+  vim.api.nvim_command [[autocmd CursorHold <buffer> lua vim.lsp.buf.document_highlight()]]
+  vim.api.nvim_command [[autocmd CursorMoved,InsertEnter <buffer> lua vim.lsp.buf.clear_references()]]
+end
+
 local on_attach = function(client, bufnr)
   vim.api.nvim_buf_set_option(bufnr, 'omnifunc', 'v:lua.vim.lsp.omnifunc')
   vim.lsp.set_log_level('warn')
@@ -211,22 +234,9 @@ nvim_lsp.hls.setup {
   capabilities = capabilities
 }
 
-nvim_lsp.pylsp.setup {
+nvim_lsp.jedi_language_server.setup {
-  on_attach    = on_attach,
+  on_attach    = on_attach_python,
-  capabilities = capabilities,
+  capabilities = capabilities
-  settings = {
-    pylsp = {
-      plugins = {
-        flake8 = {
-          enabled = true,
-          config  = vim.fn.expand('~/.config/flake8')
-        },
-        pylint = {
-          enabled = true,
-        }
-      }
-    }
-  }
 }
 
 require('rust-tools').setup(rust_tool_opts)