issue #247 Setting python virtual environment

lua/navigator/lspclient/clients_default.lua

@@ -142,6 +142,10 @@ M.defaults = function()
 
     pyright = {
       on_attach = on_attach,
+      -- on_init = require('navigator.lspclient.python').on_init,
+      on_init = function(client)
+        require('navigator.lspclient.python').on_init(client)
+      end,
       cmd = { 'pyright-langserver', '--stdio' },
       filetypes = { 'python' },
       flags = { allow_incremental_sync = true, debounce_text_changes = 500 },

lua/navigator/lspclient/python.lua

@@ -0,0 +1,38 @@
+local util = require('lspconfig/util')
+local path = util.path
+local M = {}
+local shell = vim.o.shell
+local exepath = vim.fn.exepath
+M.pyenv_path = function(workspace)
+  -- Use activated virtualenv.
+  if vim.env.VIRTUAL_ENV then
+    return path.join(vim.env.VIRTUAL_ENV, 'bin', 'python'), 'virtual env'
+  end
+
+  -- Find and use virtualenv in workspace directory.
+  for _, pattern in ipairs({ '*', '.*' }) do
+    local match = vim.fn.glob(path.join(workspace, pattern, 'pyvenv.cfg'))
+    local sep = require('navigator.util').path_sep()
+    local py = 'bin' .. sep .. 'python'
+    if match ~= '' then
+      print('found', match)
+      print(vim.fn.glob(path.join(workspace, pattern)))
+      match = string.gsub(match, 'pyvenv.cfg', py)
+      return match, string.format('venv base folder: %s', match)
+    end
+    match = vim.fn.glob(path.join(workspace, pattern, 'poetry.lock'))
+    if match ~= '' then
+      local venv_base_folder = vim.fn.trim(vim.fn.system('poetry env info -p'))
+      return path.join(venv_base_folder, 'bin', 'python'), string.format('venv base folder: %s', venv_base_folder)
+    end
+  end
+
+  -- Fallback to system Python.
+  return exepath('python3') or exepath('python') or 'python', 'fallback to system python path'
+end
+M.on_init = function(client)
+  local python_path, msg = M.pyenv_path(client.config.root_dir)
+  vim.notify(string.format('%s \ncurrent python path: %s', msg, python_path))
+  client.config.settings.python.pythonPath = python_path
+end
+return M