fzf package.json script selector

yarn-run-fzf.sh

#!/bin/bash

yarn() {
  # Check for required dependencies: jq and fzf
  local missing_deps=()
  for dep in jq fzf; do
    if ! command -v "$dep" &>/dev/null; then
      missing_deps+=("$dep")
    fi
  done

  if [ ${#missing_deps[@]} -ne 0 ]; then
    echo "Warning: The following dependencies are missing: ${missing_deps[*]}"
    return 1
  fi

  # Allow running `yarn` and any of `yarn` subcommands directly
  if [[ "$1" != "run" ]]; then
    command yarn "$@"
    return 0
  fi

  # Allow running a specified `yarn run` script directly
  if [[ "$#" -ne 1 ]]; then
    command yarn "$@"
    return 0
  fi

  # When `yarn run` is not followed by anything, launch fzf to pick a script
  local package_json="package.json"
  if ! [[ -f $package_json ]]; then
    echo "Error: There's no package.json in the current directory"
    return 1
  fi

  local script_names script_name
  script_names=$(jq -r '.scripts | keys_unsorted[]' "$package_json")

  # Use fzf to select a script from package.json and display a preview of the command
  script_name=$(echo "$script_names" | fzf --cycle --height ~100% --border --info inline --header="Select a script to run with ENTER. ESC to quit." \
    --preview="jq -r --arg script {} '.scripts[\$script]' $package_json" \
    --color 'border:#778899' \
    --preview-window=up:1 --history="$HISTFILE")

  if [[ -n "$script_name" ]]; then
    local command_to_run="yarn run $script_name"
    echo "$command_to_run"
    print -s "$command_to_run" # Add the command to Zsh history
    command yarn run "$script_name"
  else
    echo "Exit: You haven't selected any script"
  fi
}

Installation

Personal preferred method

I copy the script in a file called yarn inside ~/.functions
The file should not have any extension (the name of the file will be use as command name).

Then in my .zlogin I load all functions in ~/.functions like so

reloadFunctions() {
  local cmdFiles file
  cmdFiles=($(ls $HOME/.functions | sed 's/\.[^.]*$//')) # list all files in $HOME/.functions without an extension
  for file in $cmdFiles; do
    autoload -U $file &&
      unfunction $file &&
      autoload -U $file
  done
}

reloadFunctions

Other methods

Either:

• Copy the whole script in your .zshrc (or .zlogin)
• Download the file, put it where you want, then source it in your .zshrc