Usage

How to use rubyc tool in docker? https://github.com/pmq20/ruby-packer

Install docker tool:

https://docs.docker.com/v17.12/install/

Straight link for Ubuntu install:

https://docs.docker.com/v17.12/install/linux/docker-ce/ubuntu/

Clone it

git clone git@github.com:iamsimakov/rubyc-usage-example.git

Build

cd rubyc-usage-example/examples

Select what example you want to build and:

docker build ./

... will take ~10 mins and near 10GB memory usage

Sample output will finished with lines:

...
linking ruby
make[2]: Leaving directory '/tmp/rubyc/ruby-2.4.1-0.4.0'
make[1]: Leaving directory '/tmp/rubyc/ruby-2.4.1-0.4.0'
-> cp "ruby" "/usr/src/app/a.out"
-> cd /usr/src/app
Removing intermediate container e9fba5750acd
 ---> 200de23ba865
Successfully built 200de23ba865

Run app

1. Script:

docker run -it 200de23ba865 bash ./a.out or docker run -it 200de23ba865 ./a.out

Sample output:

### Search for nodes by css
### Search for nodes by xpath
### Or mix and match.

2. Rails app

docker run -it 200de23ba865 bash ./a.out server -e production or docker run -p 3001:3000 -it 200de23ba865 ./a.out server -e production -p 3000

And from you host machine: http://localhost:3001/

This example rails app generate from rails v5.2 template. With applying next changes:

1. add to Gemfile gem 'nokogiri', '~> 1.10', '>= 1.10.1' to test building app with native extensions
2. add to Gemfile gem 'therubyracer' to working assets compiling(node runtime)
3. add to Gemfile gem 'tzinfo-data' to internal work with data
4. comment Gemfile gem 'bootsnap', '>= 1.1.0', require: false
5. config/boot.rb comment require 'bootsnap/setup'
6. config/environments/production.rb change cache store config config.cache_store = :memory_store, { size: 64.megabytes }

! Note: rubyc build readonly file system that's why you can not:

1. run app in development env with watching files, but you can config development env without watching files - so run app with production env
2. use rails cache with file_store in local Rails.root folder - you must use another folder such as /tmp/my_cache/ or memory cache
3. compile assets on the fly - you must compile assets before packing app

Recomendations

More info read: https://github.com/pmq20/ruby-packer

Based on: pmq20/ruby-packer#39 (comment)