Date: Wed, 04 Jan 2012 08:59:12 +0000 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: freebsd-ports@freebsd.org Subject: Re: How to detect the version of a installed perl module during portbuild Message-ID: <4F0414E0.9030206@infracaninophile.co.uk> In-Reply-To: <CE503C49DD251ECD02D0F7E1@utd71538.utdallas.edu> References: <4F036A7F.1000908@FreeBSD.org> <CE503C49DD251ECD02D0F7E1@utd71538.utdallas.edu>
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On 03/01/2012 23:41, Paul Schmehl wrote:
> This returns the installed package:
>=20
> pkg_info -qa | grep "p5-JSON-RPC" | sort | uniq
Woah! Try it like this:
pkg_info -Ex p5-JSON-RPC
> so maybe you could do something like?
>=20
> JSON_VER=3D`pkg_info -qa | grep "p5-JSON-RPC" | sort | uniq | cut -d'-'=
-f4`
JSON_VER=3D$( pkg_info -Ex p5-JSON-RPC | sed -e 's/^.*-//' )
> .if ${JSON_VER} >=3D 1
> do this
> .else
> do this
> .endif
case ${JSON_VER) in
1.*)
do_stuff
;;
0.*)
do_something_else
;;
esac
case does a string comparison using standard shell globbing rules --
it's a lot more flexible than trying to do maths on version numbers.
Using perl to generate the version number is also viable as suggested by
Jason:
perl -MJSON::RPC -le 'print $JSON::RPC::VERSION'
but it strikes me as slightly wasteful to fire up an entire perl
interpreter just to print out the value of one variable.
However, if the object is to create a port that has a BUILD_DEPENDS on
devel/p5-JSON-RPC then you only need to support what is already in the
ports -- and that's version 1.01. The BUILD_DEPENDS line can enforce tha=
t:
BUILD_DEPENDS =3D p5-JSON-RPC>=3D1.01:${PORTSDIR}/devel/p5-JSON-RPC
Should you have some program that requires JSON::RPC <=3D 0.96, then
create a p5-JSON-RPC-096 port to provide exactly that.
Cheers,
Matthew
--=20
Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard
Flat 3
PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate
JID: matthew@infracaninophile.co.uk Kent, CT11 9PW
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