feat(python): autovenv keeps activated on subdirs (#12396)

Co-authored-by: Carlo Sala <carlosalag@protonmail.com>

plugins/python/README.md

@@ -32,8 +32,9 @@ virtual environments:
   `venv`) in the current directory.
 
 - `auto_vrun`: Automatically activate the venv virtual environment when entering a directory containing
-  `<venv-name>/bin/activate`, and automatically deactivate it when navigating out of it (including
-  subdirectories!).
+  `<venv-name>/bin/activate`, and automatically deactivate it when navigating out of it (keeps venv activated
+  in subdirectories).
   - To enable the feature, set `export PYTHON_AUTO_VRUN=true` before sourcing oh-my-zsh.
-  - The default virtual environment name is `venv`. To use a different name, set
+  - Plugin activates first virtual environment in lexicographic order whose name begins with `<venv-name>`.
+    The default virtual environment name is `venv`. To use a different name, set
     `export PYTHON_VENV_NAME=<venv-name>`. For example: `export PYTHON_VENV_NAME=".venv"`

plugins/python/python.plugin.zsh

@@ -86,11 +86,20 @@ function mkv() {
 
 if [[ "$PYTHON_AUTO_VRUN" == "true" ]]; then
   # Automatically activate venv when changing dir
-  auto_vrun() {
-    if [[ -f "${PYTHON_VENV_NAME}/bin/activate" ]]; then
-      source "${PYTHON_VENV_NAME}/bin/activate" > /dev/null 2>&1
-    else
+  function auto_vrun() {
+    # deactivate if we're on a different dir than VIRTUAL_ENV states
+    # we don't deactivate subdirectories!
+    if (( $+functions[deactivate] )) && [[ $PWD != ${VIRTUAL_ENV:h}* ]]; then
+      deactivate > /dev/null 2>&1
+    fi
+
+    if [[ $PWD != ${VIRTUAL_ENV:h} ]]; then
+      for _file in "${PYTHON_VENV_NAME}"*/bin/activate(N.); do
+        # make sure we're not in a venv already
         (( $+functions[deactivate] )) && deactivate > /dev/null 2>&1
+        source $_file > /dev/null 2>&1
+        break
+      done
     fi
   }
   add-zsh-hook chpwd auto_vrun