rebar3_gen

A rebar plugin that generates .erl/.hrl (or any other source files) via templates, fetching data from specified URLs.

Templates

This plugin uses mustache template engine to generate files. Each .gen source file must contain data URL at first line, in form of {{!https://PATH/TO/JSON}} comment line. After data is fetched, it is converted according to it's Content-Type headers (currently JSON is supported) and passed to template.
If no URL is provided, template will be called with empty list [] as input

There is a way of parsing and applying custom modifications to fetched data via .script file of same name. It should contain valid Erlang code and will be called with Data binding fetched data.

Build

$ rebar3 compile

Use

Add the plugin to your rebar config:

{plugins, [
    {rebar3_gen, {git, "https://github.com/furmanOFF/rebar3_gen.git", {branch, "master"}}}
]}.

Then just call your plugin directly in an existing application:

$ rebar3 gen
===> Fetching rebar3_gen
===> Compiling rebar3_gen
===> Downloading <URI1>
===> Evaluating <FILE1>.script
===> Writing out <FILE1>

To have it invoked automatically when running rebar3 compile add it as a provider_hooks:

{provider_hooks, [
    {pre, [{compile, gen}]}
]}.

TODO

• Additional URIs (e.g. file://)
• Additional Content-Types (e.g. XML, YAML)
• Customize project search path
• Customize .gen file extension
• Multiple data inputs in .gen file