add volatile sources support in libapt-pkg

Sources are usually defined in sources.list (and co) and are pretty
stable, but once in a while a frontend might want to add an additional
"source" like a local .deb file to install this package (No support for
'real' sources being added this way as this is a multistep process).

We had a hack in place to allow apt-get and apt to pull this of for a
short while now, but other frontends are either left in the cold by this
and/or the code for it looks dirty with FIXMEs plastering it and has on
top of this also some problems (like including these 'volatile' sources
in the srcpkgcache.bin file).

So the biggest part in this commit is actually the rewrite of the cache
generation as it is now potentially a three step process. The biggest
problem with adding support now through is that this makes a bunch of
previously mostly unusable by externs and therefore hidden classes
public, so a bit of further tuneing on this now public API is in order…

1 files changed, 40 insertions, 5 deletions

diff --git a/test/integration/test-apt-get-install-deb b/test/integration/test-apt-get-install-deb
index 0f34692fe..991185dea 100755
--- a/test/integration/test-apt-get-install-deb
+++ b/test/integration/test-apt-get-install-deb
@@ -5,15 +5,21 @@ TESTDIR=$(readlink -f $(dirname $0))
 . $TESTDIR/framework
 
 setupenvironment
-configarchitecture "i386"
+configarchitecture 'amd64' 'i386'
 
 # regression test for #754904
 testfailureequal 'E: Unable to locate package /dev/null' aptget install -qq /dev/null
 
-# and ensure we fail for invalid debs
-cat > foo.deb <<EOF
+# only consider .deb files
+cat > foo.rpm <<EOF
 I'm not a deb, I'm a teapot.
 EOF
+testfailureequal "E: Unable to locate package ./foo.rpm
+E: Couldn't find any package by glob './foo.rpm'
+E: Couldn't find any package by regex './foo.rpm'" aptget install -qq ./foo.rpm
+
+# and ensure we fail for invalid debs
+mv foo.rpm foo.deb
 testfailure aptget install ./foo.deb
 testsuccess grep '^E: Sub-process Popen returned an error code' rootdir/tmp/testfailure.output
 testequal 'E: Encountered a section with no Package: header
@@ -21,7 +27,36 @@ E: Problem with MergeLister for ./foo.deb
 E: The package lists or status file could not be parsed or opened.' tail -n 3 rootdir/tmp/testfailure.output
 
 # fakeroot is currently not found, framwork needs updating
-buildsimplenativepackage 'foo' 'all' '1.0'
+buildsimplenativepackage 'foo' 'i386,amd64' '1.0'
+
+testfailureequal "Reading package lists...
+Building dependency tree...
+Note, selecting 'foo:i386' instead of './incoming/foo_1.0_i386.deb'
+Note, selecting 'foo' instead of './incoming/foo_1.0_amd64.deb'
+Some packages could not be installed. This may mean that you have
+requested an impossible situation or if you are using the unstable
+distribution that some required packages have not yet been created
+or been moved out of Incoming.
+The following information may help to resolve the situation:
+
+The following packages have unmet dependencies:
+ foo:i386 : Conflicts: foo but 1.0 is to be installed
+ foo : Conflicts: foo:i386 but 1.0 is to be installed
+E: Unable to correct problems, you have held broken packages." aptget install ./incoming/foo_1.0_i386.deb ./incoming/foo_1.0_amd64.deb -s -q=0
+
 testdpkgnotinstalled 'foo'
-testsuccess aptget install ./incoming/foo_1.0_all.deb
+testsuccess aptget install ./incoming/foo_1.0_i386.deb
 testdpkginstalled 'foo'
+
+testsuccessequal "Reading package lists...
+Building dependency tree...
+Reading state information...
+Note, selecting 'foo' instead of './incoming/foo_1.0_amd64.deb'
+The following packages will be REMOVED:
+  foo:i386
+The following NEW packages will be installed:
+  foo
+0 upgraded, 1 newly installed, 1 to remove and 0 not upgraded.
+Remv foo:i386 [1.0]
+Inst foo (1.0 now [amd64])
+Conf foo (1.0 now [amd64])" aptget install ./incoming/foo_1.0_amd64.deb -s -q=0