mason 0.0.1-dev.34

A Dart template generator which helps teams generate files quickly and consistently.

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Mason allows developers to create and consume reusable templates called bricks.

Quick Start

Installing

# Activate from pub.dev
$ pub global activate mason

# Or install using Homebrew
$ brew tap felangel/mason
$ brew install mason

Initializing

$ mason init

mason init initializes the Mason CLI in the current directory.

Running mason init generates a mason.yaml and an example brick so that you can get started immediately.

bricks:
  hello:
    path: bricks/hello

To get all bricks registered in mason.yaml run:

$ mason get

Then you can use mason make to generate your first file:

$ mason make hello

Command Line Variables

Any variables can be passed as command line args.

$ mason make hello --name Felix

Variable Prompts

Any variables which aren't specified as command line args will be prompted.

$ mason make hello
name: Felix

JSON Input Variables

Any variables can be passed via json file:

$ mason make hello --json hello.json

where hello.json is:

{
  "name": "Felix"
}

The above commands will all generate HELLO.md in the current directory with the following content:

Hello Felix!

Creating New Bricks

Create a new brick using the mason new command.

$ mason new <BRICK_NAME>

The above command will generate a new brick in the bricks directory with a brick.yaml and __brick__ template directory.

Brick YAML

The brick.yaml contains metadata for a brick template.

name: example
description: An example brick
vars:
  - name

Brick Template

Write your brick template in the __brick__ directory using mustache templates. See the mustache manual for detailed usage information.

__brick__/example.md

# Hello {{name}}!

❗ Note: __brick__ can contain multiple files and subdirectories

❗ Note: use {{{variable}}} instead of {{variable}} when you want the value of variable to be unescaped

File Resolution

It is possible to resolve files based on path input variables using the {{% %}} tag.

For example, given the following brick.yaml:

name: app_icon
description: Create an app_icon file from a URL
vars:
  - url

And the following brick template:

__brick__/{{% url %}}

Running mason make app_icon -- --url path/to/icon.png will generate icon.png with the contents of path/to/icon.png where the path/to/icon.png can be either a local or remote path. Check out the app icon example brick to try it out.

Installing Brick Templates Globally

The install command allows developers to install brick templates globally on their machines from either a local path or git url. Then developers can use globally installed brick templates anywhere (regardless of whether there is an existing mason.yaml).

Install Usage

# install from path
$ mason install --source path ./path/to/brick

# install from git url
$ mason install --source git https://github.com/user/repo

# install from git url with path
$ mason install --source git https://github.com/user/repo --path path/to/brick

# install from git url with path and ref
$ mason install --source git https://github.com/user/repo --path path/to/brick --ref tag-name

# use alias "i" instead of "install" for a shorthand syntax
# since git is the default source we don't need to specify a source.
$ mason i https://github.com/user/repo

Once a brick is installed globally it can be used from anywhere via the mason make command:

$ mason make <NAME-OF-GLOBAL-BRICK>

Bundling

You can use mason to generate a bundle for an existing template. Bundles are convenient for cases where you want to include your template as part of a standalone CLI. Very Good CLI is a great example.

There are currently two types of bundles:

1. Universal - a platform-agnostic bundle
2. Dart - a Dart specific bundle

To generate a bundle:

# Universal Bundle
mason bundle ./path/to/brick -d ./path/to/destination

# Dart Bundle
mason bundle ./path/to/brick -t dart -d ./path/to/destination

Usage

$ mason --help
⛏️  mason • lay the foundation!

Usage: mason <command> [arguments]

Global options:
-h, --help       Print this usage information.
    --version    Print the current version.

Available commands:
  bundle    Generates a bundle from a brick template
  cache     Interact with mason cache
  get       Gets all bricks.
  init      Initialize mason in the current directory.
  install   Installs a brick globally
  make      Generate code using an existing brick template.
  new       Creates a new brick template.