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fish-async-prompt

Make your prompt asynchronous in Fish.

Description

Demo Video

We run your fish_prompt and fish_right_prompt functions as a separate process to update your prompt asynchronously.

Installation

With Fisher:

$ fisher install acomagu/fish-async-prompt

Loading Indicator

By default, it prints the previous prompt until the new one is ready. But you can change it to any other string. Define a function which named <prompt-func-name>_loading_indicator, like fish_prompt_loading_indicator.

For example, to show … as the indicator of right prompt:

function fish_right_prompt_loading_indicator
    echo (set_color '#aaa')' … '(set_color normal)
end

demo1

You can also use the previous prompt string because the function receives it as the first argument. For example, show previous prompt but grayed out:

function fish_right_prompt_loading_indicator -a last_prompt
    echo -n "$last_prompt" | sed -r 's/\x1B\[[0-9;]*[JKmsu]//g' | read -zl uncolored_last_prompt
    echo -n (set_color brblack)"$uncolored_last_prompt"(set_color normal)
end

demo2

The loading indicator can be set up not only for fish_prompt or fish_right_prompt, but also for other function, if you specify it in async_prompt_functions. e.g.

function _git_branch_name
    sleep 1 # For demo.
    git symbolic-ref --short HEAD ^/dev/null
end

function fish_right_prompt
    echo (set_color 88f)(_git_branch_name) (set_color cyan)(prompt_pwd)
end

# Async prompt setup.
set async_prompt_functions _git_branch_name

function _git_branch_name_loading_indicator
    echo (set_color brblack)…(set_color normal)
end

demo3

Other Configurations

If you have problems, try changing the values of these variables. When you change the configurations, please restart your shell.

async_prompt_inherit_variables

Define variables inherited to prompt functions. Set all to pass all global variables.

Default: status pipestatus SHLVL CMD_DURATION fish_bind_mode

Example:

set -U async_prompt_inherit_variables all

async_prompt_functions

Define functions replaced to run asynchronously. Usually one or both of fish_prompt and fish_right_prompt.

Other functions can be specified, but they must be called from fish_prompt or fish_right_prompt and function arguments can't be passed to it.

Default: fish_prompt fish_right_prompt

Example:

set -U async_prompt_functions fish_right_prompt

async_prompt_internal_signal

fish-async-prompt uses SIGUSR1 to communicate with the spawned process by default. If it conflicts with other plugin/program, try changing this.

Default: SIGUSR1

Example:

set -U async_prompt_internal_signal SIGUSR2

Author

License

MIT