Invoice generation (pdf)

[challengee]

We have two options here.

• We can go for a gem that generates PDF's using a Ruby DSL (https://github.com/prawnpdf/prawn). (how do we deal with invoice templates then?)
• We can go for a gem that generates PDF's from HTML (https://github.com/adjust/shrimp) using phantomjs. Advantage here is that we can use a HTML templating language (https://github.com/Shopify/liquid).

Note: We need to generate the pdf's out of process. As this is pretty intense and can not be done in a thread (MRI GIL).

[challengee]

Or use https://github.com/rtomayko/tilt as an interface to any templating language

[challengee]

Link to https://playground.jsreport.net/ from README