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build-dep was implemented by parsing the build-dependencies of a package
and figuring out which packages to install/remove based on this. That
means that for the first level of dependencies build-dep was
implementing its very own resolver with all the benefits (aka: bugs)
this gives us for not using the existing resolver for all levels.
Making this work involves generating a dummy binary package with fitting
Depends and Conflicts and as we can't create them out of thin air the
cache generation needs to be involved so we end up writing a Packages
file which we want to parse – after we have parsed the other Packages
files already. With .dsc/.deb files we could add them before we started
parsing anything.
With a bit of care we can avoid generating too much data we have to
throw away again (as many parts assume that e.g. the count of packages
doesn't change midair), so that on a speed front there shouldn't be
much of a difference, but output can be slightly confusing as if we have
a completely valid cache on disk the "Reading package lists... Done" is
printed two times – but apt is pretty quick about it in that case.
Closes: #137560, #444930, #489911, #583914, #728317, #812173
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This doesn't allow all tests to run cleanly, but it at least allows to
write tests which could run successfully in such environments.
Git-Dch: Ignore
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Git-Dch: Ignore
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We support arch= for a while, now we finally add lang= as well and as a
first simple way of controlling which targets to acquire also target=.
This asked for a redesign of the internal API of parsing and storing
information about 'deb' and 'deb-src' lines. As this API isn't visible
to the outside no damage done through.
Beside being a nice cleanup (= it actually does more in less lines) it
also provides us with a predictable order of architectures as provides
in the configuration rather than based on string sorting-order, so that
now the native architecture is parsed/displayed first. Observeable e.g.
in apt-get output.
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We use test{success,failure} now all over the place in the framework, so
its only consequencial to do this in the situations in which we test for
a specific output as well.
Git-Dch: Ignore
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cases we have to choose a provider by defaulting on host-arch
instead of build-arch
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- remove architecture-specific arch to tuple expansion-rules as they lead
to the same tuples for different architectures (e.g. linux-arm for arm,
armel and armhf) while the dpkg-architecture code uses triples which
are different (in the first part, which we omit in our tuples), so e.g.
build-dep restrictions for armel ended up effecting armhf as well
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- use the host architecture, not the build architecture for matching
of [architecture restrictions] in Build-Depends (Closes: #672927)
*
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- for cross-build-dependencies M-A: none should be DEB_HOST_ARCH,
not DEB_BUILD_ARCH (Closes: #646288)
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packages first (LP: #835625)
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