Control: reassign -1 general Control: affectes -1 + sgml-base xml-core docbook-xml Control: tags -1 + help
On Tue, Apr 16, 2013 at 10:40:21AM +0200, Helmut Grohne wrote: > | PreDepends order for docbook-xml > | Trying to SmartConfigure xml-core > | SmartConfigure xml-core > | DepAdd: xml-core > | DepAdd: sgml-base > | DepAdd: perl > | DepAdd FAILS on: perl > | DepAdd FAILS on: sgml-base > | DepAdd FAILS on: xml-core > | E: Couldn't configure pre-depend xml-core for docbook-xml, probably a > dependency cycle. This was the failure mode. > Stuart Prescott also tried demoting this Pre-Dependency to Depends and > showed that the very same upgrade failure occurs. So this is not an > option. The conclusion here is that the only way to fix this bug in sgml-base is to have *no* dependency on dpkg at all. > What sgml-base really needs is to update the super catalog when there is > no squeeze dpkg anymore. Neither installed nor running. The > Pre-Dependency was used to be configured after dpkg has been restarted > by apt. > > An entirely different and very hacky option would be for sgml-base to > declare a trigger interest in /usr/bin/dpkg. It could then be configured > as the old version causing a possibly broken super catalog which would > be fixed by the dpkg trigger invocation. This does not directly > guarantee that squeeze's dpkg has finished, but it appears very likely > as triggers are usually run late. The previous option does not quite work out and is frowned upon by the dpkg maintainers. wheezy's sgml-base really cannot work with squeeze's dpkg at all. The reason is that in squeeze triggers do not work for conffiles. For details see #675613. Should an apt run terminate with wheezy's sgml-base being configured and squeeze's dpkg still installed, the super catalog may be broken. So we must have at least a Depends (plus some logic for fixing triggers). The conclusion here is that ultimately these two bugs (#675613 #705452) cannot be both fixed in sgml-base. That is why I am reassigning the bug to general. This is not to say that sgml-base does not need to be changed, but it cannot be the only package to touch. To that end I looked for other options, specifically for why docbook-xml Pre-Depends on xml-core. The reason here was a etch -> lenny upgrade issue #482140. The cause was usage of non-essential tools in prerm. Worse, those tools are inserted by debhelper. Another package that carries those tools, docbook-xsl, does not carry such a Pre-Depends. So either of the following assertion is true: 1) docbook-xsl is rc buggy and needs a Pre-Depends on xml-core. 2) docbook-xml does not need this Pre-Depends anymore. I attempted to verify 1) using the steps described in http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=482140#275. So here I was using squeeze -> wheezy instead of etch -> lenny and docbook-xsl instead of docbook-xml. The issue is not reproducible this way. This makes 2) a least possible. What options do we have at this point? Helmut -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
