e8517244f7
PR #776 fixed an issue with complex aliases and expansion. However, this change also introduced a problem with aliases which contain `]` (for example, commonly seen on macOS: `alias ]=open`), due to using an associative array `seen_alias`, indexed by the alias name. Due to `"$seen_alias[$arg]"`, it would fail when `$arg` is expanded to anything containing `]`'. Thus, typing `] /` would result in: ``` > ] / (anon):unset:3: seen_alias[]]: invalid parameter name ``` This change fixes the issue by ensuring we properly access keys in the associative array `seen_alias`. Older versions of zsh have issues with map keys having special characters, especially lacking ways to remove such keys. The issue is described in detail in https://unix.stackexchange.com/questions/626393/in-zsh-how-do-i-unset-an-arbitrary-associative-array-element. This fix uses proposal from [zsh-workers/43269](https://www.zsh.org/mla/workers/2018/msg01073.html), discovered by Stephane Chazelas, that boils down to avoid removing keys from the map, and reconstruct the map anew with some keys omitted. Co-authored-by: @phy1729
zsh-syntax-highlighting 
Fish shell-like syntax highlighting for Zsh.
Requirements: zsh 4.3.11+.
This package provides syntax highlighting for the shell zsh. It enables highlighting of commands whilst they are typed at a zsh prompt into an interactive terminal. This helps in reviewing commands before running them, particularly in catching syntax errors.
Some examples:
Before: 
After: 
Before: 
After: 
Before: 
After: 
Before: 
After: 
How to install
See INSTALL.md.
FAQ
Why must zsh-syntax-highlighting.zsh be sourced at the end of the .zshrc file?
zsh-syntax-highlighting works by hooking into the Zsh Line Editor (ZLE) and computing syntax highlighting for the command-line buffer as it stands at the time z-sy-h's hook is invoked.
In zsh 5.2 and older,
zsh-syntax-highlighting.zsh hooks into ZLE by wrapping ZLE widgets. It must
be sourced after all custom widgets have been created (i.e., after all zle -N
calls and after running compinit) in order to be able to wrap all of them.
Widgets created after z-sy-h is sourced will work, but will not update the
syntax highlighting.
In zsh newer than 5.8 (not including 5.8 itself),
zsh-syntax-highlighting uses the add-zle-hook-widget facility to install
a zle-line-pre-redraw hook. Hooks are run in order of registration,
therefore, z-sy-h must be sourced (and register its hook) after anything else
that adds hooks that modify the command-line buffer.
Does syntax highlighting work during incremental history search?
Highlighting the command line during an incremental history search (by default bound to to Ctrl+R in zsh's emacs keymap) requires zsh 5.4 or newer.
Under zsh versions older than 5.4, the zsh-default underlining of the matched portion of the buffer remains available, but zsh-syntax-highlighting's additional highlighting is unavailable. (Those versions of zsh do not provide enough information to allow computing the highlighting correctly.)
See issues #288 and #415 for details.
How are new releases announced?
There is currently no "push" announcements channel. However, the following alternatives exist:
- GitHub's RSS feed of releases: https://github.com/zsh-users/zsh-syntax-highlighting/releases.atom
- An anitya entry: https://release-monitoring.org/project/7552/
How to tweak
Syntax highlighting is done by pluggable highlighter scripts. See the documentation on highlighters for details and configuration settings.