Enhance your package.json scripts with features like: menus, functions, arrays, concurrency and many more. 

chanzo

script-launcher

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  "description": "Enhance your package.json scripts with features like: menus, functions, arrays, concurrency and many more.",

    "url": "git+https://github.com/chanzo/script-launcher.git"

[![GitHub last commit][github-last-commit]](#)

[![Dependency status][david-dm-image]][david-dm-url]

[![Dev Dependency status][david-dm-dev-image]][david-dm-dev-url]

[npm-url]: https://npmjs.org/package/script-launcher

[npm-image]: https://img.shields.io/npm/v/script-launcher.svg

[downloads-image]: https://img.shields.io/npm/dm/script-launcher.svg

[github-last-commit]: https://img.shields.io/github/last-commit/chanzo/script-launcher.svg?maxAge=2400

[david-dm-url]: https://david-dm.org/chanzo/script-launcher

[david-dm-image]: https://img.shields.io/david/chanzo/script-launcher.svg

[david-dm-dev-url]: https://david-dm.org/chanzo/script-launcher?type=dev

[david-dm-dev-image]: https://img.shields.io/david/dev/chanzo/script-launcher.svg

[license-image]: https://img.shields.io/npm/l/script-launcher.svg

Enhance your **package.json** scripts with features like: menus, functions, arrays, concurrency and many more. The features of Script Launcher are specialized in such a way, that working with Mac, Linux and Windows can be seamless experience.

![alt text](usage-animation.gif 'Script Launcher usage example')

- [Migrate package.json scripts](#migrate-packagejson-scripts)

- [Implementation examples](#implementation-examples)

  - [Sequential scripts](#sequential-scripts)

  - [Change directory](#change-directory)

  - [Parameters and functions](#parameters-and-functions)

  - [Reference scripts](#reference-scripts)

  - [Reference scripts by using wildcards](#reference-scripts-by-using-wildcards)

  - [Environment and command line argument values](#environment-and-command-line-argument-values)

  - [Environment String Manipulation and Expanding Variables](#environment-string-manipulation-and-expanding-variables)

  - [Launch arguments, command arguments, parameters and arguments](#launch-arguments-command-arguments-parameters-and-arguments)

  - [Escaping characters](#escaping-characters)

  - [Environment values and special commands](#environment-values-and-special-commands)

  - [Concurrent scripts](#concurrent-scripts)

  - [Inline script blocks](#inline-script-blocks)

  - [Confirmation prompt](#confirmation-prompt)

  - [Condition and exclusion constraints](#condition-and-exclusion-constraints)

  - [Repeaters (String)](#repeaters-string)

  - [Repeaters (Object)](#repeaters-object)

  - [Interactive menu](#interactive-menu)

  - [Menu save default script](#menu-save-default-script)

- [Launcher arguments](#launcher-arguments)

  - [Launcher Command: init](#launcher-command-init)

  - [Launcher Command: migrate](#launcher-command-migrate)

  - [Launcher Command: script](#launcher-command-script)

  - [Launcher Command: list](#launcher-command-list)

- [Launcher settings](#launcher-settings)

  - [Limit Concurrency](#limit-concurrency)

- [Enable tab completion](#enable-tab-completion)

Install **script-launcher** as a development dependency in your project.

Use **launch init** to create a starter configuration based on one of the available templates.

If not already done so, change your **package.json** start script, so it will start Script Launcher. If you do not want to change your start script, you can also add [custom run scripts](#start-a-specific-launch-script-by-using-the-npm-run) for starting Script Launcher.

You are now ready to start use Script Launcher by running: `npm start` or `npm start serve:dev`.

### Environment String Manipulation and Expanding Variables

| Pattern                | Description                                      |

| ---------------------- | ------------------------------------------------ |

| ${var:num1:num2}       | Substring                                        |

| ${var/pattern/string}  | Find and replace (only replace first occurrence) |

| ${var//pattern/string} | Find and replace all occurrences                 |

| ${var,}                | Convert first character to lowercase.            |

| ${var,,}               | Convert all characters to lowercase.             |

| ${var^}                | Convert first character to uppercase.            |

| ${var^^}               | Convert all character to uppercase..             |

**Run**: `npm start build-stuff arg1 ARG2 arg3`

<summary>Output:</summary>

### Launch arguments, command arguments, parameters and arguments

- **Launch arguments:** These are values passed to `laucher` directly, for example: `launch init` or `launch version`

- **Command arguments:** These are values passed from the command line that was used to start the script, for example: `npm start build my-arg1 my-arg2`

- **Function arguments:** These are values passed from scripts to a function. Arguments are accessed by a number, for example: `$1`

- **Parameters:** These are for passing a fixed set of values to a function. Parameters are accessed by their name, for example: `$project`

      "echo Function Parameter 1: $funcParam1",

      "echo Function Parameter 2: $funcParam2",

      "echo Main Parameter 1: $myParam1",

      "echo Main Parameter 2: ${myParam2}",

      "myFunc:$myParam1:funcParam funcArg $1",

### Environment values and special commands

| Pattern                 | Type        | Description                                                                                   |

| ----------------------- | ----------- | --------------------------------------------------------------------------------------------- |

| **launch_version**      | Environment | Launcher Version number                                                                       |

| **launch_platform**     | Environment | Operating system **[platform](https://nodejs.org/api/process.html#process_process_platform)** |

| **launch_time_start**   | Environment | Start time                                                                                    |

| **launch_time_current** | Environment | Current time                                                                                  |

| **launch_time_elapsed** | Environment | Elapsed time                                                                                  |

| **launch_style_blue** | Environment | **Blue text** |

| **launch_style_bold**   | Environment | **Bold text**                                                                                 |

| **launch_style_cyan** | Environment | **Cyan text** |

| **launch_style_dim** | Environment | **Dim text** |

| **launch_style_green** | Environment | **Green text** |

| **launch_style_normal** | Environment | Nomal text                                                                                    |

| **launch_style_red** | Environment | **Red text** |

| **launch_style_yellow** | Environment | **Yellow text** |

| **"echo"**              | Command     | Output an empty line                                                                          |

| **""**                  | Command     | Output an empty line                                                                          |

| **"--"**                | Command     | Line with the width of the terminal                                                           |

| **"#"**                 | Command     | Added at the begining for a line to disable execution                                         |

| **"\|?"**               | Command     | Grep like functionality                                                                       |

      "condition": "echo grep example |? example",

        "echo ${launch_style_bold}Version:$launch_style_normal $launch_version",

		{
		"name": "script-launcher",
		"version": "1.34.1",
		"version": "1.34.2",
		"description": "Enhance your package.json scripts with features like: menus, functions, arrays, concurrency and many more.",
		@@ -5,0 +5,0 @@ "main": "launch.js",

		@@ -455,4 +455,4 @@ # Script Launcher
		```text
		Package version: 1.34.1
		Package version: 1.34.1
		Package version: 1.34.2
		Package version: 1.34.2
		Argument 1 : arg1
		@@ -616,5 +616,5 @@ Argument 2 : arg2
		$1 : arg1
		$npm_package_version : 1.34.1
		$npm_package_version : 1.34.2
		${1} : arg1
		${npm_package_version} : 1.34.1
		${npm_package_version} : 1.34.2
		```
		@@ -688,3 +688,3 @@
		grep example
		Version: 1.34.1
		Version: 1.34.2
		Platform: linux
		@@ -691,0 +691,0 @@ Time: 2019-09-16 10:33:20.628