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oh-my-zsh/plugins/history-substring-search/README.md

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# zsh-history-substring-search
This is a clean-room implementation of the [Fish shell][1]'s history search
feature, where you can type in any part of any command from history and then
press chosen keys, such as the UP and DOWN arrows, to cycle through matches.
[1]: http://fishshell.com
[2]: http://www.zsh.org/mla/users/2009/msg00818.html
[3]: http://sourceforge.net/projects/fizsh/
[4]: https://github.com/robbyrussell/oh-my-zsh/pull/215
[5]: https://github.com/zsh-users/zsh-history-substring-search
[6]: https://github.com/zsh-users/zsh-syntax-highlighting
Requirements
------------------------------------------------------------------------------
* [ZSH](http://zsh.sourceforge.net) 4.3 or newer
Install
------------------------------------------------------------------------------
Using the [Homebrew]( https://brew.sh ) package manager:
brew install zsh-history-substring-search
echo 'source $(brew --prefix)/share/zsh-history-substring-search/zsh-history-substring-search.zsh' >> ~/.zshrc
Using [Fig](https://fig.io):
Fig adds apps, shortcuts, and autocomplete to your existing terminal.
Install `zsh-history-substring-search` in just one click.
<a href="https://fig.io/plugins/other/zsh-history-substring-search" target="_blank"><img src="https://fig.io/badges/install-with-fig.svg" /></a>
Using [Oh-my-zsh](https://github.com/robbyrussell/oh-my-zsh):
1. Clone this repository in oh-my-zsh's plugins directory:
git clone https://github.com/zsh-users/zsh-history-substring-search ${ZSH_CUSTOM:-~/.oh-my-zsh/custom}/plugins/zsh-history-substring-search
2. Activate the plugin in `~/.zshrc`:
plugins=( [plugins...] zsh-history-substring-search)
3. Run `exec zsh` to take changes into account:
exec zsh
Using [zplug](https://github.com/zplug/zplug):
1. Add this repo to `~/.zshrc`:
zplug "zsh-users/zsh-history-substring-search", as: plugin
Using [antigen](https://github.com/zsh-users/antigen):
1. Add the `antigen bundle` command just before `antigen apply`, like this:
```
antigen bundle zsh-users/zsh-history-substring-search
antigen apply
```
2. Then, **after** `antigen apply`, add the key binding configurations, like this:
```
# zsh-history-substring-search configuration
bindkey '^[[A' history-substring-search-up # or '\eOA'
bindkey '^[[B' history-substring-search-down # or '\eOB'
HISTORY_SUBSTRING_SEARCH_ENSURE_UNIQUE=1
```
Using [Zinit](https://github.com/zdharma-continuum/zinit):
1. Use the `Oh-my-zsh` Zinit snippet in `~/.zshrc`:
zinit snippet OMZ::plugins/git/git.plugin.zsh`
2. Load the plugin in `~/.zshrc`:
zinit load 'zsh-users/zsh-history-substring-search
zinit ice wait atload'_history_substring_search_config'
3. Run `exec zsh` to take changes into account:
exec zsh
Usage
------------------------------------------------------------------------------
1. Load this script into your interactive ZSH session:
source zsh-history-substring-search.zsh
If you want to use [zsh-syntax-highlighting][6] along with this script,
then make sure that you load it *before* you load this script:
source zsh-syntax-highlighting.zsh
source zsh-history-substring-search.zsh
2. Bind keyboard shortcuts to this script's functions.
Users typically bind their UP and DOWN arrow keys to this script, thus:
* Run `cat -v` in your favorite terminal emulator to observe key codes.
     (**NOTE:** In some cases, `cat -v` shows the wrong key codes. If the
key codes shown by `cat -v` don't work for you, press `<C-v><UP>` and
`<C-v><DOWN>` at your ZSH command line prompt for correct key codes.)
* Press the UP arrow key and observe what is printed in your terminal.
* Press the DOWN arrow key and observe what is printed in your terminal.
* Press the Control and C keys simultaneously to terminate the `cat -v`.
* Use your observations from the previous steps to create key bindings.
For example, if you observed `^[[A` for UP and `^[[B` for DOWN, then:
bindkey '^[[A' history-substring-search-up
bindkey '^[[B' history-substring-search-down
However, if the observed values don't work, you can try using terminfo:
bindkey "$terminfo[kcuu1]" history-substring-search-up
bindkey "$terminfo[kcud1]" history-substring-search-down
Users have also observed that `[OA` and `[OB` are correct values,
_even if_ these were not the observed values. If you are having trouble
with the observed values, give these a try.
You might also want to bind the Control-P/N keys for use in EMACS mode:
bindkey -M emacs '^P' history-substring-search-up
bindkey -M emacs '^N' history-substring-search-down
You might also want to bind the `k` and `j` keys for use in VI mode:
bindkey -M vicmd 'k' history-substring-search-up
bindkey -M vicmd 'j' history-substring-search-down
3. Type any part of any previous command and then:
* Press the `history-substring-search-up` key, which was configured in
step 2 above, to select the nearest command that (1) contains your query
and (2) is also older than the current command in your command history.
* Press the `history-substring-search-down` key, which was configured in
step 2 above, to select the nearest command that (1) contains your query
and (2) is also newer than the current command in your command history.
* Press `^U` the Control and U keys simultaneously to abort the search.
4. If a matching command spans more than one line of text, press the LEFT
arrow key to move the cursor away from the end of the command, and then:
* Press the `history-substring-search-up` key, which was configured in
step 2 above, to move the cursor to the line above the cursored line.
When the cursor reaches the first line of the command, pressing the
`history-substring-search-up` key again will cause this script to
perform another search.
* Press the `history-substring-search-down` key, which was configured in
step 2 above, to move the cursor to the line below the cursored line.
When the cursor reaches the last line of the command, pressing the
`history-substring-search-down` key, which was configured in step 2
above, again will cause this script to perform another search.
Configuration
------------------------------------------------------------------------------
This script defines the following global variables. You may override their
default values.
* `HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_FOUND` is a global variable that defines
how the query should be highlighted inside a matching command. Its default
value causes this script to highlight using bold, white text on a magenta
background. See the "Character Highlighting" section in the zshzle(1) man
page to learn about the kinds of values you may assign to this variable.
* `HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_NOT_FOUND` is a global variable that
defines how the query should be highlighted when no commands in the
history match it. Its default value causes this script to highlight using
bold, white text on a red background. See the "Character Highlighting"
section in the zshzle(1) man page to learn about the kinds of values you
may assign to this variable.
* `HISTORY_SUBSTRING_SEARCH_GLOBBING_FLAGS` is a global variable that defines
how the command history will be searched for your query. Its default value
causes this script to perform a case-insensitive search. See the "Globbing
Flags" section in the zshexpn(1) man page to learn about the kinds of
values you may assign to this variable.
* `HISTORY_SUBSTRING_SEARCH_FUZZY` is a global variable that defines
how the command history will be searched for your query. If set to a non-empty
value, causes this script to perform a fuzzy search by words, matching in
given order e.g. `ab c` will match `*ab*c*`
* `HISTORY_SUBSTRING_SEARCH_PREFIXED` is a global variable that defines how
the command history will be searched for your query. If set to a non-empty
value, your query will be matched against the start of each history entry.
For example, if this variable is empty, `ls` will match `ls -l` and `echo
ls`; if it is non-empty, `ls` will only match `ls -l`.
* `HISTORY_SUBSTRING_SEARCH_ENSURE_UNIQUE` is a global variable that defines
whether all search results returned are _unique_. If set to a non-empty
value, then only unique search results are presented. This behaviour is off
by default. An alternative way to ensure that search results are unique is
to use `setopt HIST_IGNORE_ALL_DUPS`. If this configuration variable is off
and `setopt HIST_IGNORE_ALL_DUPS` is unset, then `setopt HIST_FIND_NO_DUPS`
is still respected and it makes this script skip duplicate _adjacent_ search
results as you cycle through them, but this does not guarantee that search
results are unique: if your search results were "Dog", "Dog", "HotDog",
"Dog", then cycling them gives "Dog", "HotDog", "Dog". Notice that the "Dog"
search result appeared twice as you cycled through them. If you wish to
receive globally unique search results only once, then use this
configuration variable, or use `setopt HIST_IGNORE_ALL_DUPS`.
* `HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_TIMEOUT` is a global variable that
defines a timeout in seconds for clearing the search highlight.
History
------------------------------------------------------------------------------
* September 2009: [Peter Stephenson][2] originally wrote this script and it
published to the zsh-users mailing list.
* January 2011: Guido van Steen (@guidovansteen) revised this script and
released it under the 3-clause BSD license as part of [fizsh][3], the
Friendly Interactive ZSHell.
* January 2011: Suraj N. Kurapati (@sunaku) extracted this script from
[fizsh][3] 1.0.1, refactored it heavily, and finally repackaged it as an
[oh-my-zsh plugin][4] and as an independently loadable [ZSH script][5].
* July 2011: Guido van Steen, Suraj N. Kurapati, and Sorin Ionescu
(@sorin-ionescu) [further developed it][4] with Vincent Guerci (@vguerci).
* March 2016: Geza Lore (@gezalore) greatly refactored it in pull request #55.
---
## Oh My Zsh Distribution Notes
What you are looking at now is Oh My Zsh's repackaging of zsh-history-substring-search as an OMZ module inside
the Oh My Zsh distribution.
The upstream repo, zsh-users/zsh-history-substring-search, can be found on GitHub at
https://github.com/zsh-users/zsh-history-substring-search.
Everything above this section is a copy of the original upstream's README, so things may differ slightly when
you're using this inside OMZ. In particular, you do not need to set up key bindings for the up and down arrows
yourself in `~/.zshrc`; the OMZ plugin does that for you. You may still want to set up additional emacs- or
vi-specific bindings as mentioned above.