Tool for listing out build dependencies for a package

[MikeFultonDev]

zopen-compute-builddeps takes a bit of a sledge hammer approach to computing what tools are actually required to build a particular package.

For example, if I want to determine what tools are required for git to be built, I can say:

zopen-compute-builddeps git

The tool clones the various tools into a temp directory, looks at the ZOPEN_TARBALL_DEPS line and computes the transitive closure of the tools required, and eventually spits out:

Transitive closure of build dependencies for git:
rsync
git
cmake
automake
help2man
texinfo
gettext
xz
perl
diffutils
zoslib
libpcre
bash
make
coreutils
grep
gawk
tar
m4
zlib
expat
autoconf
wget
gzip
curl
ncurses
findutils
openssl
sed

It probably has some bugs and certainly could be improved if someone is interested.