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lfetool Command Manual

install Command

The install command supports the following sub-commands:

  • lfetool
  • lfe
  • erlang
  • erjang
  • kerl
  • rebar
  • relx

You may also call ./lfetool install without any parameters; this is an alias for ./lfetool install lfetool.

install or install lfetool

Assuming you have downloaded lfetool to your local directory, you can use it to install the script either to /usr/local/bin (default) or to a path of your choosing:

$ ./lfetool install

or, for a custom directory:

$ ./lfetool install lfetool ~/bin/

You need to have write permissions to the given directory in order for this command to succeed. Note that the installation procedure sets the executable bit for the script.

install lfe

If you would like to install LFE system-wide, you may use the following command to do so. This does assume that you have erl in your path.

$ lfetool install lfe

If using kerl, this will install LFE in the lib dir for whichever Erlang install was most recently activate``ed by ``kerl.

Installing LFE is really only justified if you will be running lfescript- based scripts. In general, we discourage system-wide LFE installations and suggest using something like rebar or erlang.mk to pull your dependencies into a project dir and running LFE from there.

install erlang

This command is merely a convenience wrapper for the kerl tool and assumes that you have kerl installed and in your $PATH. It takes a single parameter, the release name of Erlang:

$ lfetool install erlang R16B03-1

This will install the given release of Erlang at /opt/erlang/R16B03-1. You can override the install dir by passing a different one:

$ lfetool install erlang R16B03-1 /usr/local

To get a list of available releases, you can use the following:

$ kerl list releases

install erjang

This command will install a version of Erlang (called "Erjang") that runs on the Java Virtual Machine:

$ lfetool install erjang

By default, it will install the erjang directory into /opt/erlang, however this may be overridden. For instance, the following command will result in the directory /usr/local/erjang being created and housing the code for Erjang:

$ lfetool install erjang /usr/local

If you do not use the lfetool-standard location for your Erjang install, you will need to make sure that your install directory is in your $PATH so that lfetool can find jerl.

Note that Erjang will download a fairly recent copy of Erlang/OTP (as of now, R16B01) and build the Erjang jar with that download.

install kerl

We depend upon kerl quite heavily, and as such, we provide a means of easily installing it:

$ lfetool install kerl
$ lfetool install kerl ~/bin/

install relx

For building releases, we recommend relx. We go so far as to provide a command to install it:

$ lfetool install relx
$ lfetool install relx ~/bin/

Note that if you don't have a recent version of rebar installed, this may fail. We have provided a rebar install command for your convenience. After installing a new version of rebar the relx install command should work.

install rebar

rebar is a widely used tool in the Erlang community, and one that can be used with LFE and LFE projects. Here's how you install it:

$ lfetool install rebar

By default, it is installed into the bin dir of the currently active version of Erlang.

$ lfetool install rebar ~/bin/

install expm

We use expm to upload project info to http://expm.co/. Here's how you install it:

$ lfetool install expm
$ lfetool install expm ~/bin/