README.md

rebar3_clojerl
=====

[![Hex.pm](https://img.shields.io/hexpm/v/rebar3_clojerl.svg)](https://hex.pm/packages/rebar3_clojerl)

Compile clojerl projects

## Use

Add the plugin to your `rebar.config` (along with `clojerl` as a dependency):

    {deps, [clojerl]}.
    {plugins, [rebar3_clojerl]}.

Then just call the plugin directly in an existing application:

    $ rebar3 clojerl compile
    ===> Fetching rebar3_clojerl
    ===> Compiling rebar3_clojerl

To get a list of all available tasks for the plugin run:

    $ rebar3 help clojerl
    ===> Compiling rebar3_clojerl

    clojerl <task>:
      compile        Compile clojerl project
      repl           Start a clojerl repl
      test           Test clojerl project

For each of these you can then get more details and available options by running
for example:

    $ rebar3 help clojerl repl
    Start a clojerl repl
	Usage: rebar3 clojerl repl [--apps <apps>] [--sname <sname>]

	  --apps   List of applications that should be started separated by commas
	           (e.g. --apps app1,app2,app3).
	  --sname  Erlang node name.

### rebar.config options

The following options are helpful for handling custom directory structure and/or
compilation behaviour:

- `clje_src_dirs`: List of directories where Clojerl source is located (default: `["src"]`).
- `clje_test_dirs`: List of directories where Clojerl tests are located (default: `["test"]`).
- `clje_compile_first`: List of files that should be compiled first (default: `[]`).
- `clje_exclude`: List of files that should be excluded from compilation (default: `[]`).

For example, if the Clojerl code was in `src/clj` instead of just `src`, the
`rebar.config` should include the following entry:

```
{clje_src_dirs, ["src/clj"]}.
```

And if we wanted to have the file for namespace `foo.bar` compiled first we would
also include the entry:

```
{clj_compile_first, ["foo/bar.clje"]}.
```

## Plugin Development

Run the following commands to checkout the repository and build the plugin:

    git checkout https://github.com/clojerl/rebar3_clojerl
    cd rebar3_clojerl
    rebar3 compile

### Install globally

`rebar3` also allows you to install [plugins globally][rebar3-plugins] through its
configuration file `~/.config/rebar3/rebar.config`.

By adding the following entry in the global `rebar.config` you will be able to use
the plugin to build your project or create a new one with the available
[template](#template).

    {plugins, [rebar3_clojerl]}.

## Template

When the plugin is [installed globally](#install-globally) you can use its template
to create a new Clojerl application.

    rebar3 new clojerl_app awesome

### Building the generated application

Running `rebar3 clojerl compile` will build the application.

### Application name

Because of how Clojerl (and Clojure) processes dashes for namespace names,
and current limitations of the templating mechanism, you can't include dashes in your
application's name. It's sad, I know. :(

[rebar3-plugins]: https://www.rebar3.org/docs/using-available-plugins
[rebar3-provider-hooks]: https://www.rebar3.org/docs/configuration#section-provider-hooks