Knob

A simple cli app that builds a docker image, tags it with a version, and pushes it to GitHub Packages for Docker.

Made by MoonBarc so he doesn't lose his sanity when developing for Docker.

Docs

In order to use Knob, you must have a Knobfile in your current directory. A Knobfile defines things like the version, url, and authorization details. Here's an example:

# Knobfile v0.1
# This is an example Knobfile.

# Fallback for when $ask receives no input or when using $default
SETDEFAULT 0.1

# Use $ask to get a prompt from the terminal, or fall back to the latest default set above.
VERSION $ask

# <username>: Github username <token-path>: A plain github token stored at that path.
LOGIN MoonBarc ~/GH_TOKEN.txt

# $version is replaced with the version specified.
URL docker.pkg.github.com/hypersapling/master-node/mkube-master:$version

There are 4 verbs so far: [SETDEFAULT,VERSION,LOGIN,URL]

[!] The login and URL verbs are required

There are also 3 system variables (custom ones coming soon) The system variables include: [ask,version,default]

These need to be started using a $ and can be put anywhere except inside of a verb.

$ask

The ask variable is special, and will prompt the user for the value when running the Knobfile

$default

The default variable is the fallback value for when a user does not specify anything in an $ask prompt, and can be changed using the SETDEFAULT verb.

$version

The version variable can be changed using the VERSION verb.

Make sure the Dockerfile and Knobfile are both in the root directory!

Have fun!