docker-like

Docker Example

Demonstrates how to define deeply nested commands, similar to the docker cli (docker container run, docker image ls, etc.).

In addition, this example shows the use of global flags, where flags defined at the root level, become available to all nested commands, like the--debug flag in docker --debug ps --all.

This example was generated with:

$ bashly init
# ... now edit src/bashly.yml to match the example ...
$ bashly generate

---

bashly.yml

name: docker
help: Docker example
version: 0.1.0

# Since we have a `commands` section below, these flags will be considered
# "global flags" and available to all sub-commands.
flags:
- long: --debug
  short: -d
  help: Enable debug mode

commands:
- name: container
  alias: c*
  help: Container commands

  commands:
  - name: run
    help: Run a container
    args:
    - name: image
      help: Image name
      required: true

  - name: stop
    help: Stop a container
    args:
    - name: container
      help: Container name
      required: true

- name: image
  alias: i*
  help: Image commands

  commands:
  - name: ls
    alias: l
    help: Show all images

- name: ps
  help: List containers

  flags:
  - long: --all
    short: -a
    help: Show all containers

Output

$ ./docker

docker - Docker example

Usage:
  docker [OPTIONS] COMMAND
  docker [COMMAND] --help | -h
  docker --version | -v

Commands:
  container   Container commands
  image       Image commands
  ps          List containers

$ ./docker -h

docker - Docker example

Usage:
  docker [OPTIONS] COMMAND
  docker [COMMAND] --help | -h
  docker --version | -v

Commands:
  container   Container commands
  image       Image commands
  ps          List containers

Global Options:
  --debug, -d
    Enable debug mode

  --help, -h
    Show this help

  --version, -v
    Show version number

$ ./docker container

docker container - Container commands

Alias: c*

Usage:
  docker container COMMAND
  docker container [COMMAND] --help | -h

Commands:
  run    Run a container
  stop   Stop a container

$ ./docker container run -h

docker container run - Run a container

Usage:
  docker container run IMAGE
  docker container run --help | -h

Options:
  --help, -h
    Show this help

Arguments:
  IMAGE
    Image name

$ ./docker container run

missing required argument: IMAGE
usage: docker container run IMAGE

$ ./docker -d container run alpine

# This file is located at 'src/container_run_command.sh'.
# It contains the implementation for the 'docker container run' command.
# The code you write here will be wrapped by a function named 'docker_container_run_command()'.
# Feel free to edit this file; your changes will persist when regenerating.
args:
- ${args[--debug]} = 1
- ${args[image]} = alpine

$ ./docker con

docker container - Container commands

Alias: c*

Usage:
  docker container COMMAND
  docker container [COMMAND] --help | -h

Commands:
  run    Run a container
  stop   Stop a container

$ ./docker image

docker image - Image commands

Alias: i*

Usage:
  docker image COMMAND
  docker image [COMMAND] --help | -h

Commands:
  ls   Show all images

$ ./docker image ls

# This file is located at 'src/image_ls_command.sh'.
# It contains the implementation for the 'docker image ls' command.
# The code you write here will be wrapped by a function named 'docker_image_ls_command()'.
# Feel free to edit this file; your changes will persist when regenerating.
args: none

$ ./docker i l

# This file is located at 'src/image_ls_command.sh'.
# It contains the implementation for the 'docker image ls' command.
# The code you write here will be wrapped by a function named 'docker_image_ls_command()'.
# Feel free to edit this file; your changes will persist when regenerating.
args: none

$ ./docker --debug ps --all

# This file is located at 'src/ps_command.sh'.
# It contains the implementation for the 'docker ps' command.
# The code you write here will be wrapped by a function named 'docker_ps_command()'.
# Feel free to edit this file; your changes will persist when regenerating.
args:
- ${args[--all]} = 1
- ${args[--debug]} = 1