How to extend existing zsh completion functions in Linux?
First you would need to find the name of your existing function, to do it, you can bind _complete_help to CTRL-h (or any other shortcut), then type your command and look for completion function. Here is an example running it for git: In this case the completion function is _git . Next you can redefine it in your .zshrc like this:
What should the first line of a zsh completion file look like?
The first line of a completion function file can look something like this: This tells zsh that the file contains code for completing the foobar command. This is the format that you will use most often for the first line, but you can also use the same file for completing several different functions if you want.
How to define and load your own shell function in zsh?
Zsh has two modes of autoloading files: Zsh’s native way and another mode that resembles ksh’s autoloading. The latter is active if the KSH_AUTOLOAD option is set. Zsh’s native mode is the default and I will not discuss the other way here (see “man zshmisc” and “man zshoptions” for details about ksh-style autoloading).
When to use the alternative function in zsh?
As with _describe, the _alternative function can itself be used in an ACTION as part of a specification for _arguments or _regex_arguments. With a single call to the _arguments function you can create fairly sophisticated completion functions.
Why does zsh not save history when it exits?
By default, zsh does not save its history when the shell exits. The history is ‘forgotten’ when you close a Terminal window or tab. To make zsh save its history to a file when it exits, you need to set a variable in the shell: Note: this is not a shell option but shell variable or parameter.
What happens to the oldest commands in zsh?
When the shell reaches this limit the oldest commands will be removed from memory or the history file. By default, when you exit zsh (for example, by closing the window or tab) this particular instance of zsh will overwrite an existing history file with its history.
How do I change the shell settings in zsh?
Any options you change will only take effect in the current instance of zsh. When you want to change the settings for all new shells, you have to put the commands in one of the configuration files (usually .zshrc ). You can list the existing shell options with the setopt command: