Re: getlua.sh - the fastest way to get a Lua interpreter on any Linux server

[William Ahern <william@...>]

On Sun, Mar 03, 2013 at 09:24:45PM +0100, Stefan Reich wrote:
> Hey ho Lua folk!
> 
> If you start a SourceForge project, you get shell access automatically 
> (http://sourceforge.net/apps/trac/sourceforge/wiki/Shell%20service). 
> Which is nice.
> 
> But there's no Lua on the system. Here's the fastest way to get an 
> interpreter after you logged in to the shell:
> 
> wget luaos.net/getlua.sh && sh getlua.sh

Unfortunately wget is far from universally available. Here's a simple shell
function which should work on most Linux, OS X, *BSD, and Solaris systems:

# 1) GNU wget
# 2) curl
# 3) GET - from Perl LWP 
# 4) ftp - BSD ftp(1) can fetch, but Linux NetKit's fork is too old
fetch() {
	URL="${1}"
	FILE=${2:-${URL##*/}}

	if [ -n "$(command -v wget)" ]; then
		wget -O "${FILE}" "${URL}";
	elif [ -n "$(command -v curl)" ]; then
		curl -o "${FILE}" "${URL}";
	elif [ -n "$(command -v GET)" ]; then
		GET "${URL}" > "${FILE}";
	elif [ -n "$(command -v ftp)" ]; then
		ftp -o "${FILE}" "${URL}";
	else
		echo "unable to fetch ${URL}" >&2;
	fi
}