A script to download an Erlang program from Gist/Hastebin and open a REPL with it compiled and loaded

erl-get

#!/bin/bash

##########################
# Description:
#   Downloads an Erlang program from a Gist or Hastebin, then opens an Erlang shell with it
#   compiled and loaded.
#
# Installation:
#   Download and install this script in /usr/local/bin
#
# Usage:
#   erl-get https://gist.github.com/somebodys/gist-thing-url
#

ERL_GET_DIR="/tmp/erl-get"
re="-module\((.+)\)"

if ! [ -d ${ERL_GET_DIR} ]; then
    mkdir ${ERL_GET_DIR}
fi

if [[ $1 =~ gist.github.com ]]; then
    # is gist
    URL="$1/raw/";
elif [[ $1 =~ hastebin.com/(.+) ]]; then
    # is hastebin
    URL="https://hastebin.com/raw/${BASH_REMATCH[1]}";
else
    echo "Invalid Gist/Hastebin URL"
    echo "erl-get parses the URL you enter to obtain the raw code from the gist/hastebin"
    echo ""
    echo "Usage:"
    echo "  erl-get <URL to Hastebin/Gist>"j
    exit 1;
fi


printf "== Downloading ${URL}\n"
(cd ${ERL_GET_DIR} && curl -Lso tmp.erl ${URL})

LINE=`cat ${ERL_GET_DIR}/tmp.erl | grep -- -module`

if [[ $LINE =~ $re ]]; then
    MODULE_NAME="${BASH_REMATCH[1]}";
    printf "== Module name: '${MODULE_NAME}'\n== Type 'l(${MODULE_NAME}).' in the shell to access it\n";
    FILE_NAME="${ERL_GET_DIR}/${MODULE_NAME}.erl"
    mv ${ERL_GET_DIR}/tmp.erl $FILE_NAME;
    erlc -o ${ERL_GET_DIR} ${FILE_NAME} && erl -pa ${ERL_GET_DIR}
else
    echo "Could not parse Erlang module name\n" >&2
fi

Installation

Tested on macOS 10.10.5:

curl -Lo /usr/local/bin/erl-get https://gist.githubusercontent.com/Lokeh/326f5b0d17335349fbd511bc61861411/raw/ && chmod +x /usr/local/bin/erl-get