Re: [gentoo-dev] RFC: auto-detection of unpack dependencies

[Ciaran McCreesh]

On Tue, 15 Jul 2008 23:23:26 +0200
Marius Mauch <genone@g.o> wrote:
> Right, just I'd expect the parsing of SRC_URI (with conditionals) to
> be a bit tricky in bash, not something I'm going to work on. An
> eclass-based solution would have a few benefits though wrt the
> metadata cache.

Well... You don't really have to parse it.

for p in $SRC_URI ; do
    if [[ "${p}" == "(" ]] || [[ "${p}" == ")" ]] || \
        [[ "${p%\?}" != "${p}" ]] ; then
        UNPACK_DEPENDS="${UNPACK_DEPENDS} $p "
    elif [[ "${p%.zip}" != "${p}" ]] ; then
        UNPACK_DEPENDS="${UNPACK_DEPENDS} app-arch/unzip "
    elif [[ "${p%.bz2}" != "${p}" ]] ; then
        UNPACK_DEPENDS="${UNPACK_DEPENDS} app-arch/bzip2 "
    fi
done

Granted, it'll generate invalid output if SRC_URI is invalid (for
example, if SRC_URI has mismatched parens, the output will too), but I
can't think of any situation where breaking DEPEND if SRC_URI is
already broken is a problem.

-- 
Ciaran McCreesh