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# Autoenv for Zsh
## Features
- - Support for enter and leave events, which can use the same file.
- By default `.autoenv.zsh` is used for entering, and `.autoenv_leave.zsh`
- for leaving.
- - Interactively asks for confirmation / authentication before sourcing an
- unknown `.autoenv.zsh` file, and remembers whitelisted files by their
- hashed content.
- - Test suite.
- - Written in Zsh.
+- Support for enter and leave events, which can use the same file.
+ By default it uses `.autoenv.zsh` for entering, and `.autoenv_leave.zsh`
+ for leaving.
+- Interactively asks for confirmation / authentication before sourcing an
+ unknown `.autoenv.zsh` file, and remembers whitelisted files by their
+ hashed content.
+- Test suite.
+- Written in Zsh.
### Variable stashing
The varstash library has been taken from smartcd, and was optimized for Zsh.
-
## Writing your .autoenv.zsh file
### `autoenv_source_parent()`
-zsh-autoenv will stop looking for `.autoenv.zsh` files after the first one has
-been found. But you can use the function `autoenv_source_parent` to source a
-parent `.autoenv.zsh` file from there.
+zsh-autoenv will stop looking for `.autoenv.zsh` files upwards after the first
+one has been found, but you can use the function `autoenv_source_parent` to
+source the next `.autoenv.zsh` file upwards the directory tree from there.
+The function accepts an optional argument, which allows to stop looking before
+the file system root is reached:
+
+```zsh
+autoenv_source_parent ../..
+```
## Installation
zgen load Tarrasch/zsh-autoenv
+### Using [zplug](https://github.com/zplug/zplug)
+
+Add the following to your `.zshrc` where you are loading your plugins:
+
+ zplug "Tarrasch/zsh-autoenv"
## Configuration
You can use the following variables to control zsh-autoenv's behavior.
Add them to your `~/.zshrc` file, before sourcing/loading zsh-autoenv.
-### AUTOENV\_FILE\_ENTER
+### AUTOENV_FILE_ENTER
+
Name of the file to look for when entering directories.
Default: `.autoenv.zsh`
-### AUTOENV\_FILE\_LEAVE
+### AUTOENV_FILE_LEAVE
+
Name of the file to look for when leaving directories.
Requires `AUTOENV_HANDLE_LEAVE=1`.
Default: `.autoenv_leave.zsh`
-### AUTOENV\_LOOK\_UPWARDS
+### AUTOENV_LOOK_UPWARDS
+
Look for zsh-autoenv "enter" files in parent dirs?
Default: `1`
-### AUTOENV\_HANDLE\_LEAVE
+### AUTOENV_HANDLE_LEAVE
+
Handle leave events when changing away from a subtree, where an "enter"
event was handled?
Default: `1`
### AUTOENV\_DISABLED
+
(Temporarily) disable zsh-autoenv. This gets looked at in the chpwd handler.
Default: 0
-### `AUTOENV_DEBUG`
-Enable debugging. Multiple levels are supported (max 2).
+### AUTOENV\_DEBUG
+
+Set debug level. If enabled (> 0) it will print information to stderr.
+
+- 0: no debug messages
+- 1: generic debug logging
+- 2: more verbose messages
+ - messages about adding/removing files on the internal stack
+- 3: everything
+ - sets xtrace option (`set -x`) while sourcing env files
Default: `0`
+## Usage
+
+zsh-autoenv works automatically once installed.
+
+You can use ``autoenv-edit`` to edit the nearest/current autoenv files.
+It will use ``$AUTOENV_EDITOR``, ``$EDITOR``, or ``vim`` for editing.
+
+## Recipes
+
+### Automatically activate Python virtualenvs
+
+Given `AUTOENV_FILE_ENTER=.autoenv.zsh`, `AUTOENV_FILE_LEAVE=.autoenv.zsh` and
+`AUTOENV_HANDLE_LEAVE=1` the following script will activate Python virtualenvs
+automatically in all subdirectories (`.venv` directories get used by
+[pipenv](https://github.com/kennethreitz/pipenv) with
+`PIPENV_VENV_IN_PROJECT=1`):
+
+```zsh
+# Environment file for all projects.
+# - (de)activates Python virtualenvs (.venv) from pipenv
+
+if [[ $autoenv_event == 'enter' ]]; then
+ autoenv_source_parent
+
+ _my_autoenv_venv_chpwd() {
+ if [[ -z "$_ZSH_ACTIVATED_VIRTUALENV" && -n "$VIRTUAL_ENV" ]]; then
+ return
+ fi
+
+ setopt localoptions extendedglob
+ local -a venv
+ venv=(./(../)#.venv(NY1:A))
+
+ if [[ -n "$_ZSH_ACTIVATED_VIRTUALENV" && -n "$VIRTUAL_ENV" ]]; then
+ if ! (( $#venv )) || [[ "$_ZSH_ACTIVATED_VIRTUALENV" != "$venv[1]" ]]; then
+ unset _ZSH_ACTIVATED_VIRTUALENV
+ echo "De-activating virtualenv: ${(D)VIRTUAL_ENV}" >&2
+ deactivate
+ fi
+ fi
+
+ if [[ -z "$VIRTUAL_ENV" ]]; then
+ if (( $#venv )); then
+ echo "Activating virtualenv: ${(D)venv}" >&2
+ source $venv[1]/bin/activate
+ _ZSH_ACTIVATED_VIRTUALENV="$venv[1]"
+ fi
+ fi
+ }
+ autoload -U add-zsh-hook
+ add-zsh-hook chpwd _my_autoenv_venv_chpwd
+ _my_autoenv_venv_chpwd
+else
+ add-zsh-hook -d chpwd _my_autoenv_venv_chpwd
+fi
+```
## Related projects
-- https://github.com/cxreg/smartcd
-- https://github.com/kennethreitz/autoenv
+- <https://github.com/direnv/direnv>
+- <https://github.com/cxreg/smartcd>
+- <https://github.com/kennethreitz/autoenv>
## History
[@joshuaclayton](https://github.com/joshuaclayton)'s dotfiles.
In September 2013 [@Tarrasch](https://github.com/Tarrasch) packaged it into a
nice [antigen]-compatible unit with integration tests. Since November 2014,
-[@blueyed](https://github.com/blueyed) took over and added many many nice
+[@blueyed](https://github.com/blueyed) took over and added many nice
features, mainly inspired by [smartcd].
[antigen]: https://github.com/Tarrasch/antigen-hs