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https://github.com/grosser/dockerb
Dockerfile.erb - use ruby in your dynamic Dockerfile
https://github.com/grosser/dockerb
Last synced: 5 days ago
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Dockerfile.erb - use ruby in your dynamic Dockerfile
- Host: GitHub
- URL: https://github.com/grosser/dockerb
- Owner: grosser
- License: mit
- Created: 2015-01-30T02:20:05.000Z (almost 10 years ago)
- Default Branch: master
- Last Pushed: 2016-03-30T04:32:26.000Z (over 8 years ago)
- Last Synced: 2024-11-02T08:24:12.301Z (12 days ago)
- Language: Ruby
- Homepage:
- Size: 16.6 KB
- Stars: 12
- Watchers: 3
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: Readme.md
- License: MIT-LICENSE
Awesome Lists containing this project
README
Dockerfile.erb - use ruby in your dynamic Dockerfile
Install
=======
```Bash
gem install dockerb
```
or standalone
```Bash
curl https://rubinjam.herokuapp.com/pack/dockerb > dockerb && chmod +x dockerb
```
Usage
=====
`docker` generates a `Dockerfile` from your `Dockerfile.erb`
(delete it after building / do not commit it)
### custom
```
RUN echo <%= "hello" + " " + "world" %>
---
RUN echo hello world
```
### install_gem
Pre-install a slow gem so re-building the container is fast
- picks the correct version from Gemfile.lock
- use before Adding Gemfile.lock or bundling
```
<%= install_gem 'nokogiri' %>
---
RUN gem install -v 1.6.3 nokogiri
```
### bundle
- add as little as necessary to bundle
- do not fail when re-locking fails due to git not being installed (`|| bundle check`)
```
<%= bundle %>
---
ADD Gemfile /app/
ADD Gemfile.lock /app/
ADD vendor/cache /app/vendor/cache
RUN bundle install --quiet --local --jobs 4 || bundle check
```
Inside of ruby:
```Ruby
Dockerb.compile do
... do other things ...
end
# Dockerfile is cleaned up
```
Author
======
[Michael Grosser](http://grosser.it)
[email protected]
License: MIT
[](https://travis-ci.org/grosser/dockerb)