feat(pipenv): add option to disable auto shell feature

plugins/pipenv/README.md

 # Pipenv
 
 ## Installation
+
 In your `.zshrc` file, add `pipenv` to the plugins section
 
 ```
@@ -8,7 +9,9 @@ plugins=(... pipenv ...)
 ```
 
 ## Features
+
 This plugin provides some features to simplify the use of Pipenv while working on ZSH.
+
 - Adds completion for pipenv
 - Auto activates and deactivates pipenv shell
 - Adds short aliases for common pipenv commands
@@ -27,3 +30,13 @@ This plugin provides some features to simplify the use of Pipenv while working o
   - `pwh` is aliased to `pipenv --where`
   - `pvenv` is aliased to `pipenv --venv`
   - `ppy` is aliased to `pipenv --py`
+
+## Configuration
+
+### Shell activation
+
+If you want to disable the shell activation and deactivation feature, add the following style to your `.zshrc` before sourcing `oh-my-zsh.sh`:
+
+```zsh
+zstyle ':omz:plugins:pipenv' auto-shell no
+```

plugins/pipenv/pipenv.plugin.zsh

@@ -12,8 +12,9 @@ fi
 
 _PIPENV_COMPLETE=zsh_source pipenv >| "$ZSH_CACHE_DIR/completions/_pipenv" &|
 
-# Automatic pipenv shell activation/deactivation
-_togglePipenvShell() {
+if zstyle -T ':omz:plugins:pipenv' auto-shell; then
+  # Automatic pipenv shell activation/deactivation
+  _togglePipenvShell() {
     # deactivate shell if Pipfile doesn't exist and not in a subdir
     if [[ ! -f "$PWD/Pipfile" ]]; then
       if [[ "$PIPENV_ACTIVE" == 1 ]]; then
@@ -30,10 +31,11 @@ _togglePipenvShell() {
         pipenv shell
       fi
     fi
-}
-autoload -U add-zsh-hook
-add-zsh-hook chpwd _togglePipenvShell
-_togglePipenvShell
+  }
+  autoload -U add-zsh-hook
+  add-zsh-hook chpwd _togglePipenvShell
+  _togglePipenvShell
+fi
 
 # Aliases
 alias pch="pipenv check"