rvirding / lfe
- пятница, 18 марта 2016 г. в 02:14:19
Erlang
Lisp Flavoured Erlang (LFE)
LFE, Lisp Flavoured Erlang, is a lisp syntax front-end to the Erlang compiler. Code produced with it is compatible with "normal" Erlang code. An LFE evaluator and shell is also included.
To compile LFE, simple clone it and compile:
$ git clone https://github.com/rvirding/lfe.git
$ cd lfe
$ make compile
LFE requires Erlang be installed on the system and that the erl
binary is
in $PATH
.
Should you wish to have LFE available system-wide, you can run
the following make
target:
$ make install
By default this will create the programs lfe
, lfec
and
lfescript
in the same directory as the erl
program. This can
changed by defining the make variable DESTBINDIR
to point to the
desired directory. So:
$ make install DESTBINDIR=/Users/rv/bin
will put the programs in /Users/rv/bin
.
If you're running LFE from a git clone working dir, you can start the REPL like so after compiling:
$ ./bin/lfe
Erlang 17 (erts-6.0) [source] [64-bit] [smp:8:8] ...
LFE Shell V6.0 (abort with ^G)
>
If you have installed LFE, then you may start the REPL from any location:
$ lfe
Erlang 17 (erts-6.0) [source] [64-bit] [smp:8:8] ...
LFE Shell V6.0 (abort with ^G)
>
Likewise, you may run an LFE shell script in the same style as shell scripts with:
$ ./bin/lfe script-name script-arg-1 ...
or
$ lfe script-name script-arg-1 ...
The docs site has several places to explore that will show you how to start using LFE. However, here's a quick taste:
> (* 2 (+ 1 2 3 4 5 6))
42
> (* 2 (lists:foldl #'+/2 0 (lists:seq 1 6)))
42
LFE now supports Docker. To get started, simply do the following, once you have Docker set up on your machine:
$ docker pull lfex/lfe
Alternatively, you could build the image yourself:
$ cd lfe
$ docker build .
Here are a couple of simple usage examples:
$ docker run lfex/lfe
42
$ docker run -i -t lfex/lfe lfe
Erlang/OTP 18 [erts-7.0] [source-4d83b58] [64-bit] [smp:8:8] ...
LFE Shell V7.0 (abort with ^G)
>
That last command will dump you into the LFE REPL on a running container
of the lfex/lfe
Docker image. For more information on using Docker
with LFE, be sure to read the
tutorial.
Files with more technical details: