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per-directory-history: redo README for Oh My Zsh

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[Per-Directory-History][6]
=========================
per-directory-history plugin
----------------------------
Per directory history for zsh, as well as global history, and the
ability to toggle between them with ^G.
This plugin adds per-directory history for zsh, as well as a global history,
and the ability to toggle between them with a keyboard shortcut. This is a
bundle of the [official plugin by @jimhester][5].
This is a implementation of per directory history for zsh, some
implementations of which exist in bash[1][],[2][]. It also implements
a per-directory-history-toggle-history function to change from using the
directory history to using the global history. In both cases the history is
always saved to both the global history and the directory history, so the
toggle state will not effect the saved histories. Being able to switch
between global and directory histories on the fly is a novel feature as far
as I am aware.
To use it, add `per-directory-history` to the plugins array in your zshrc file:
This is a standalone repository for the script, however it is also included in
[oh-my-zsh][4] as a plugin.
```zsh
plugins=(... per-directory-history)
```
----------------------------------------------------------------------------
Usage
----------------------------------------------------------------------------
This is an implementation of per-directory history for zsh, some implementations
of which exist in bash[1][],[2][]. It also implements a toggle-history function
to change from using the directory history to using the global history. In both
cases the history is always saved to both the global history and the directory
history, so the toggle state will not effect the saved histories. Being able to
switch between global and directory histories on the fly is a novel feature.
1. Load this script into your interactive ZSH session:
## Usage
% source zsh-per-directory-history.zsh
The default mode is per directory history, interact with your history as normal.
2. The default mode if per directory history, interact with your history as normal.
Press ^G (the <kbd>Control</kbd> and <kbd>G</kbd> keys simultaneously) to toggle
between local and global histories. If you would prefer a different shortcut to
toggle set the `PER_DIRECTORY_HISTORY_TOGGLE` environment variable.
3. Press ^G (the Control and G keys simultaneously) to toggle between local
and global histories. If you would prefer a different shortcut to toggle
set the PER_DIRECTORY_HISTORY_TOGGLE environment variable.
## Configuration
-------------------------------------------------------------------------------
Configuration
-------------------------------------------------------------------------------
* `HISTORY_BASE` is a global variable that defines the base directory in which the
directory histories are stored (default `$HOME/.directory_history`).
* `per-directory-history-toggle-history` is the function to toggle between local
and global histories.
* `PER_DIRECTORY_HISTORY_TOGGLE` is the key binding used to run the toggle-history
function above (default `^G`)
* HISTORY_BASE a global variable that defines the base directory in which the
directory histories are stored
* per-directory-history-toggle-history is the function to toggle the history
-------------------------------------------------------------------------------
History
-------------------------------------------------------------------------------
## History
The idea/inspiration for a per directory history is from [Stewart MacArthur][1]
and [Dieter][2], the implementation idea is from [Bart Schaefer][3]. The
implementation is by [Jim Hester][5] in September 2012.
and [Dieter][2], the implementation idea is from [Bart Schaefer][3]. The
implementation is by [Jim Hester][4] in September 2012.
[1]: http://www.compbiome.com/2010/07/bash-per-directory-bash-history.html
[2]: http://dieter.plaetinck.be/per_directory_bash
[3]: https://www.zsh.org/mla/users/1997/msg00226.html
[4]: https://github.com/robbyrussell/oh-my-zsh
[5]: http://jimhester.com
[6]: https://github.com/jimhester/per-directory-history
[4]: https://jimhester.com
[5]: https://github.com/jimhester/per-directory-history