plugn 
Hook system that lets users extend your application with plugins
Installation
$ wget -qO /tmp/plugn_latest.tgz https://github.com/dokku/plugn/releases/download/v0.3.2/plugn_0.3.2_linux_x86_64.tgz
$ tar xzf /tmp/plugn_latest.tgz -C /usr/local/bin
Usage
$ PLUGIN_PATH=/var/lib/dokku/plugins plugn
Available commands:
config Plugin configuration
disable Disable a plugin
enable Enable a plugin
help Shows help information for a command
init Initialize an empty plugin path
install Install a new plugin from a Git URL
list List all local plugins
source Source commands for sourcable plugins
trigger Triggers hook in enabled plugins
uninstall Remove plugin from available plugins
update Update plugin and optionally pin to commit/tag/branch
version Show version
Building & Testing (in docker)
$ docker-machine create -d virtualbox plugn-dev
$ eval $(docker-machine env plugn-dev)
$ make build-in-docker
$ make test
Plugin directory structure example
ps (plugin name)
├── [-rw-r--r--] plugin.toml (metadata)
├── [-rwxr-xr-x] post-deploy (trigger)
├── [-rwxr-xr-x] post-stop (trigger)
└── [-rwxr-xr-x] pre-deploy (trigger)
plugin.toml format example
[plugin name]
description = "plugin description"
version = "0.1.0"
Releases
Anybody can propose a release. First bump the version in Makefile, make sure CHANGELOG.md is up to date, and make sure tests are passing. Then open a Pull Request from master into the release branch. Once a maintainer approves and merges, CircleCI will build a release and upload it to Github.
License
BSD