What are the key features of a homebrew recipe?
If I want to contribute a recipe, e.g. this one for udunits to the the hombrew-science repository, how would I convert a command-line script like this:
wget ftp://ftp.unidata.ucar.edu/pub/udunits/udunits-2.1.24.tar.gz tar -xvf udunits-2.1.24.tar.gz cd udunits-2.1.24 ./configure make make check make clean
into a valid recipe?