Need to improve error message for malformed Pkgmgr xml

[labrown]

pkgmgr_gen.py can be used to generate Pkgmgr xml that looks like:

<PackageList? uri='​http://lib.stat.cmu.edu/R/CRAN/bin/linux/redhat/el5/x86_64/' priority='0' type='yum'>

<Package name='R' type='yum'>

<Instance epoch='2' version='2.6.0' release='3.rh5' arch='x86_64'/>

</Package> <Package name='R-devel' type='yum'>

<Instance epoch='2' version='2.6.0' release='3.rh5' arch='x86_64'/>

</Package> <Package name='libRmath' type='yum'>

<Instance epoch='2' version='2.6.0' release='3.rh5' arch='x86_64'/>

</Package> <Package name='libRmath-devel' type='yum'>

<Instance epoch='2' version='2.6.0' release='3.rh5' arch='x86_64'/>

</Package>

</PackageList?>

This looks well-formed but is not and generates the following error when the validator is run:

/var/lib/bcfg2/Pkgmgr/r-project.xml *FAILS* to verify <---- /var/lib/bcfg2/Pkgmgr/r-project.xml:1: element PackageList?: Schemas validity error : Element 'PackageList?' [CT local]: The element content is not valid. /var/lib/bcfg2/Pkgmgr/r-project.xml fails to validate

PackageList? must include a ContainerType? element of some sort in order to be proper.

Enhancement: Improve error message to communicate this requirement.

[desai]

I think this is an artifact of using an old version of libxml2. Using a new version, I get a more informative message:

/home/desai/tmp/bcfg2/Pkgmgr/x.xml ***FAILS*** to verify                <----
/home/desai/tmp/bcfg2/Pkgmgr/x.xml:2: element Package: Schemas validity error : Element 'Package': This element is not expected. Expected is ( Group ).
/home/desai/tmp/bcfg2/Pkgmgr/x.xml fails to validate

I am going to close this out for now.