rid (run-in-docker)

Run commands in container as if were native. Stress-free dockerized development environment finally arrived.

What is rid?

With a rid/ directory at the root of a project, any command prefixed by rid is executed within a Docker container.

$ ls ./rid
config.yml
docker-compose.yml
Dockerfile

That is to say, even if your environment is absolutely clean and you have nothing but docker, docker-compose and rid, getting started with a new Rails project from scratch has never been easier.

# install dependencies and setup a database
$ rid cp .env{.sample,}
$ rid bundle install --path vendor/bundle
$ rid rake db:create
$ rid rake db:schema:load

# start a server
$ rid rails s

Installation

First, install Docker and Docker Compose. The easiest way to do this on macOS is by installing Docker for Mac.

macOS

You can install rid via Homebrew:

$ brew install creasty/tools/rid

Linux

Download a binary from here: https://github.com/creasty/rid/releases

Windows

Not supported yet

Usage

rid is a project contextual tool, meaning that it's aware of working directory and automatically finds the root directory of a project by locating a configuration file.

Typical rid directory looks like this:

rid/                   # rid directory at the root of a project (e.g., same level as `.git`'s)
  libexec/             # custom sub-commands for rid
  config.yml           # configuration file for rid
  docker-compose.yml   # docker-compose manifest
  Dockerfile           # dockerfile

Note that rid/config.yml and rid/docker-compose.yml are regardlessly required for rid to work with.

Config file

Configurable parameters of rid/config.yml are the following.

type Config struct {
	// ProjectName is used for `docker-compose` in order to distinguish projects in other locations
	ProjectName string `json:"project_name" valid:"required"`

	// MainService is a service name in `docker-compose.yml`, in which container commands given to rid are executed
	// Default is "app"
	MainService string `json:"main_service"`
}

Custom commands

Executables in rid/libexec/ can be run as a sub command.

rid/libexec/
  foo           # `rid foo` -- this is executed in a container
  rid-bar       # `rid bar` -- name starts with `rid-` is executed on a host computer
  rid-bar.txt   # optionally, placing `.txt` file that shares the common basename enables "help" functionality

Help file should have a title in the first line:

Show greeting message

Usage:
    rid bar NAME

The title (first line) appears on the help of rid.

$ rid
Execute commands via docker-compose

Usage:
    rid COMMAND [args...]
    rid COMMAND -h|--help
    rid [options]

Options:
    -h, --help     Show this
    -v, --version  Show rid version
        --debug    Debug context and configuration

Commands:
    compose  # Execute docker-compose
    foo
    bar      # Show greeting message

And rid COMMAND -h prints the full contents.

$ rid bar -h
Show greeting message

Usage:
    rid bar NAME

Development

Surprise surprise, rid itself is developed by rid!

$ rid glide install  # install dependencies
$ rid make test      # run lint and tests
$ rid make           # compile for darwin/amd64
$ ./bin/rid -v       # execute a new binary