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[](https://travis-ci.org/erlware/relx)
Relx
=======
A release assembler for Erlang.
Synopsis
--------
relx [*options*] [*release-specification-file*]
Description
-----------
Relx assembles releases for an Erlang/OTP release. Given a release
specification and a list of directories in which to search for OTP
applications it will generate a release output. That output depends
heavily on what plugins available and what options are defined, but
usually it is simply a well configured release directory.
The *release-specification-file* is optional but otherwise contains
additional specification information for releases.
Building
--------
To build relx and generate a standalone escript executable:
$ make
This creates the executable `relx`.
Note, if using your own `rebar`, it must at least be > version
2.2.0-20-g6e24cd6. Unfortunately, the 2.2.0 release of rebar is not
sufficient.
Building on Windows
-------------------
To build relx on Windows you'll need to have rebar installed and the path to
the rebar binary added to the `PATH` environment variable. To start the build
use the `bootstrap` batch file:
c:\> bootstrap
This creates the executable `relx` and the `relx.cmd` shortcut script. Copy
both of these files to a directory and make the directory available to the
`PATH` environment variable.
Config File
-----------
By default `relx` looks for `relx.config` in the current working directory:
```erlang
{release, {relname, "vsn"},
[app1,
app2]}.
{extended_start_script, true}.
```
Options
-------
| Short | Long | Type | Default | Description |
|:-----:|:------------:|:-------:|:------:|------------------------------------------------------------------------------------------- |
| -r | --root | string | ./ | Sets the root of the project |
| -n | --name | string | | Name for the release that will be generated |
| -v | --relvsn | string | | Version for the release |
| -g | --goal | string | | A goal for the system. These are usually the OTP apps that are part of the release |
| -u | --upfrom | string | | The release to upgrade from. Only valid with relup target |
| -o | --output-dir | string | ./ | The output directory for the release |
| -l | --lib-dir | string | | Additional dirs to search for OTP apps |
| | --system_libs | string | | Path to a Erlang system libs to use |
| -p | --path | string | | Additional dirs to add to Erlang code path |
| | --default-libs | boolean | true | Whether to use the default system added lib dirs (means you must add them all manually) |
| -V | --verbose | integer | 2 | The verbosity level between 0 and 3 |
| -a | --override_app | string | | An app name and a directory to override in the form appname:dir |
| -c | --config | string | ./relx.config | Config file path |
| | --overlay_vars | string | | Path to a file of overlay variables |
| | --sys_config | string | | Path to a file to use for sys.config |
| -d | --dev-mode | boolean | false | Symlink all applications and configuration into the release instead of copying|
Wiki
----
[relx wiki](https://github.com/erlware/relx/wiki)
|
