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General utilities

Below you can find a list of general purpose utilities.


spaceship::exists <command>

This command validates that given program is available for execution. It checks for PATH binaries, functions, and builtins. It returns zero exit code if a command exists and non-zero code otherwise.

You can use this utility to check if some program is installed and perform actions conditionally. For example, you can either return an error and exit or continue script's execution. For example:

# Check multiple commands for existing
if spaceship::exists nvm; then
  # extract nvm version
elif spaceship::exists node; then
  # extract node version

# Do nothing if docker is not installed
spaceship::exists docker || return


spaceship::defined <function>

The same as spaceship::exists, but for functions. It returns zero exit code if a function has been defined previously and non-zero if function hasn't.

You can use this utility to check if a user has previously defined a function or not. For example:

# Check if section has been defined
if spaceship::defined spaceship_section; then
  # section is not found


This utility returns zero exit code if a current working directory is a Git repository and non-zero if it's not. For example:

# Return if current directory is not a git repository
spaceship::is_git || return


The same as spaceship::is_git, but for Mercurial repositories. This utility returns zero exit code if a current working directory is a Mercurial repository and non-zero if it's not.

# Return if current directory is not a Mercurial repository
spaceship::is_hg || return


Checks if a section is asynchronous or not by checking SPACESHIP_<SECTION>_ASYNC option. This utility returns zero exit code if a section is asynchronous and non-zero if it's not.

If SPACESHIP_PROMPT_ASYNC is set to false, then all sections are considered to be synchronous.

spaceship::is_section_async <section>
  1. section Required — a section to be checked.

Some sections are always synchronous, not matter what, to ensure correct work of the prompt. Those are: user, dir, host, exec_time, async, line_sep, jobs, exit_code and char.


Checks if the prompt works in asynchronous mode or not. This utility returns zero exit code if the prompt works in asynchronous mode and non-zero if it's not.

Check if SPACESHIP_PROMPT_ASYNC is set to true and zsh-async is loaded.


This utility checks if option variable is set and if it is, prints the message. The message supports escapes to set foreground color, background color and other visual effects.

spaceship::deprecated <option> [message]
  1. option Required — the name of a deprecated variable. If this variable is set (contains any value), then "%B$deprecated%b is deprecated. will be printed. %B and %b is escapes to set the bold style for text.
  2. message Optional — a string for additional deprecation message. Can contain prompt expansions.

Read more about escapes in Prompt Expansion section of Zsh documentation.

Here's an example of usage:

spaceship::deprecated SPACESHIP_BATTERY_ALWAYS_SHOW "Use %BSPACESHIP_BATTERY_SHOW='always'%b instead."


This utility converts seconds into a human-readable format. It splits seconds into days (d), hours (h), minutes (m) and seconds (s).

spaceship::displaytime <seconds> [precision]
  1. seconds Required — seconds for conversion into the readable format.
  2. precision Optional — precision of the output. Default value is 1.

The usage example looks like this:

spaceship::displaytime 123456
#> 1d 10h 17m 36.0s

paceship::displaytime 123.45 2
#> 2m 3.45s


A utility for performing a union (intersection) of arrays. It lists the contents found in two or more arrays.

Spaceship uses this utility internally for resolution of sections that need to be sourced.

spaceship::union <arr1[ arr2[ ...]]>
  1. arr... — a list of arrays.

Here is an example:

arr1=('a' 'b' 'c')
arr2=('b' 'c' 'd')
arr3=('c' 'd' 'e')
spaceship::union $arr1 $arr2 $arr3
#> a b c d e


Performs an upward search for a specific file or directory. Returns the path of the first found file or directory. Goes upwards up to the repository or system root directory. Useful for understanding the context of a current directory.

spaceship::upsearch [--silent] <paths...>
  1. paths... Required — a list of paths to search.
  2. --silent or -s Optional — if set, then the utility will return zero exit code, if at least one of paths is found and non-zero, if not.

This can be used for detecting project context or finding a specific file upwards.

# Understanding the project context
spaceship::upsearch -s package.json node_modules && echo "Node project detected."

# Finding a specific file upwards
spaceship::upsearch package.json
#> /path/to/project/package.json


This utility queries data files for a specific key. It returns the value of the key. Exits with non-zero code when the file type is unknown, data cannot be read, or the key is not found.

spaceship::extract --<type> <file> [key]
  1. --type Required — a type of the data file. Can be json, yaml, toml or xml.
  2. file Required — a path to the data file.
  3. key Optional — a key to query within a data file.

You can use this utility to query data from a data file:

spaceship::extract --json package.json ""
#> "John Doe"

It needs the following tools for reading data files:


The most universal solution for reading data files is to use python-yq.