[Lucid-LBM] SRU: Make gobi_loader unique to ABI and flavour

SRU Justification:

Impact: When adding the gobi loader and its udev rule to the wwan package
(to support certain wwan cards) it was not taken into account that these
files are installed into common directories and by that are not unique to
the package. This causes problems when trying to upgrade the package to a
newer kernel ABI as packages are considered different but still provide
the same files. Also this would not allow to install multiple flavors in
parallel.

Fix: For the packaging the udev rules file is modified to check for the
current kernel version and run a <abi>-<flavor> postfixed version of the
gobi_loader. And both the rules file and the loader are renamed to be
<abi>-<flavor> postfixed.

Testcase: Installing two flavors of the wwan package or upgrade between
abi version currently fails.

From 644ff5a21c8eeca4f41ecda7b4bdc9e87ee77a60 Mon Sep 17 00:00:00 2001
From: Stefan Bader <stefan.bader@canonical.com>
Date: Tue, 14 Sep 2010 12:05:52 +0200
Subject: [PATCH] UBUNTU: wwan: Make gobi_loader unique to ABI and flavour

BugLink: http://bugs.launchpad.net/bugs/638115

This resolves the problems of packages being held back on ABI bumps and
multiple flavours not being installable in parallel.

Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
---
 debian/rules.d/2-binary-arch.mk |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)

On 09/14/2010 09:35 AM, Stefan Bader wrote:
> SRU Justification:
>
> Impact: When adding the gobi loader and its udev rule to the wwan package
> (to support certain wwan cards) it was not taken into account that these
> files are installed into common directories and by that are not unique to
> the package. This causes problems when trying to upgrade the package to a
> newer kernel ABI as packages are considered different but still provide
> the same files. Also this would not allow to install multiple flavors in
> parallel.
>
> Fix: For the packaging the udev rules file is modified to check for the
> current kernel version and run a<abi>-<flavor>  postfixed version of the
> gobi_loader. And both the rules file and the loader are renamed to be
> <abi>-<flavor>  postfixed.
>
> Testcase: Installing two flavors of the wwan package or upgrade between
> abi version currently fails.
>
>  From 644ff5a21c8eeca4f41ecda7b4bdc9e87ee77a60 Mon Sep 17 00:00:00 2001
> From: Stefan Bader<stefan.bader@canonical.com>
> Date: Tue, 14 Sep 2010 12:05:52 +0200
> Subject: [PATCH] UBUNTU: wwan: Make gobi_loader unique to ABI and flavour
>
> BugLink: http://bugs.launchpad.net/bugs/638115
>
> This resolves the problems of packages being held back on ABI bumps and
> multiple flavours not being installable in parallel.
>
> Signed-off-by: Stefan Bader<stefan.bader@canonical.com>
> ---
>   debian/rules.d/2-binary-arch.mk |   20 ++++++++++++++++++++
>   1 files changed, 20 insertions(+), 0 deletions(-)
>
> diff --git a/debian/rules.d/2-binary-arch.mk b/debian/rules.d/2-binary-arch.mk
> index 37739a5..25f3a1b 100644
> --- a/debian/rules.d/2-binary-arch.mk
> +++ b/debian/rules.d/2-binary-arch.mk
> @@ -185,6 +185,26 @@ endif
>   	done
>   	$(MAKE) -C $(wwsrcdir) prefix=$(wwpkgdir) install
>   	install -d $(wwpkgdir)/DEBIAN
> +
> +	#
> +	# Hack to make the udev rule and firmware loader specific to the
> +	# package.
> +	#
> +	POSTFIX="$(abinum)-$(target_flavour)"				\
> +	R='PROGRAM="\/bin\/uname -r",';					\
> +	R=$$R' RESULT!="'$(release)-$$POSTFIX'",';			\
> +	R=$$R' GOTO="gobi_rules_end"';					\
> +	sed -i -e "s/^\(LABEL=\"gobi_rules\"\)$$/\0\n$$R\n/"		\
> +	    -e "s/\(gobi_loader\)/\0-$$POSTFIX/"			\
> +	    $(wwpkgdir)/lib/udev/rules.d/60-gobi.rules
> +
> +	TGTFILE="$(wwpkgdir)/lib/udev/rules.d/60-gobi";			\
> +	chmod 644 $${TGTFILE}.rules;					\
> +	mv $${TGTFILE}.rules $${TGTFILE}-$(abinum)-$(target_flavour).rules
> +
> +	TGTFILE="$(wwpkgdir)/lib/udev/gobi_loader";			\
> +	mv $$TGTFILE $$TGTFILE-$(abinum)-$(target_flavour)
> +
>   	for script in postinst postrm; do				       \
>   		sed -e 's/@@KVER@@/$(release)-$(abinum)-$*/g'		       \
>   			debian/control-scripts/$$script			       \

The concept is right, though I haven't actually run the code. I had to 
do the same thing for compat-wireless firmware udev rules and class names.

Acked-by: Tim Gardner <tim.gardner@canonical.com>

On Tue, Sep 14, 2010 at 05:35:54PM +0200, Stefan Bader wrote:
> SRU Justification:
> 
> Impact: When adding the gobi loader and its udev rule to the wwan package
> (to support certain wwan cards) it was not taken into account that these
> files are installed into common directories and by that are not unique to
> the package. This causes problems when trying to upgrade the package to a
> newer kernel ABI as packages are considered different but still provide
> the same files. Also this would not allow to install multiple flavors in
> parallel.

I understand that this is likely an artifact of your packaging, but 
gobi-loader is entirely kernel version agnostic. There should never be 
any requirement to install multiple versions of it or its rules.

On 09/15/2010 04:05 PM, Matthew Garrett wrote:
> On Tue, Sep 14, 2010 at 05:35:54PM +0200, Stefan Bader wrote:
>> SRU Justification:
>>
>> Impact: When adding the gobi loader and its udev rule to the wwan package
>> (to support certain wwan cards) it was not taken into account that these
>> files are installed into common directories and by that are not unique to
>> the package. This causes problems when trying to upgrade the package to a
>> newer kernel ABI as packages are considered different but still provide
>> the same files. Also this would not allow to install multiple flavors in
>> parallel.
> 
> I understand that this is likely an artifact of your packaging, but 
> gobi-loader is entirely kernel version agnostic. There should never be 
> any requirement to install multiple versions of it or its rules.
> 
Right this is only needed because I put it into the lbm package and due to the
way the packaging works. Its fine in Maverick where it is in its own package.

-Stefan

Applied to Lucid-LBM (package re-uploaded to proposed)