Use the project virtualenv for the Python IDE

.config/emacs/init.el

@@ -126,8 +126,29 @@
               ("C-c C-p" . flymake-goto-prev-error)
               ("C-c C-l" . flymake-show-diagnostics-buffer)))
 
+(use-package pyvenv)
+
+(defun find-venv ()
+  "Try to find a .venv/ directory in the current project"
+  (require 'f)
+  (let ((basedir (f-traverse-upwards
+                  (lambda (path)
+                    (let ((venv-path (f-expand ".venv" path)))
+                      (f-exists? venv-path))))))
+    (when basedir (f-expand ".venv" basedir))))
+
+(defun load-python-env ()
+  "Set up the Python IDE in the current project"
+  (interactive)
+  (let ((venv-dir (find-venv)))
+    (if venv-dir
+        (progn
+          (pyvenv-activate venv-dir)
+          (lsp))
+      (pyvenv-deactivate))))
+
 (use-package python
   :bind (:map python-mode-map
               ("C-c C-p" . nil)
               ("C-c C-l" . nil))
-  :hook ((python-mode . lsp)))
+  :hook ((python-mode . load-python-env)))

.config/setup/01-install-packages.sh

@@ -9,8 +9,7 @@ htop \
 ibus-mozc \
 keepassxc \
 mpv \
-python3-flake8 \
-python3-pylsp \
+python3-venv
 sway \
 swayidle \
 swaylock \

.local/bin/make-venv

@@ -0,0 +1,6 @@
+#! /usr/bin/sh
+
+python3 -m venv .venv
+. .venv/bin/activate
+pip install 'python-lsp-server[all]'
+pip install -e .