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The relevant testcases are in test/integration/test-apt-get-source.
There is a test for #731853 that is supposed to "ensure that apt will
pick the higher version number" of 0.0.1 (stable) and 0.1 (stable).
However, this works by pure chance, as simply reversing the order
of the two insertsource lines makes the test fail.
So #731853 isn't really fixed, yet.
Actually, that's related to the problem I reported, as the underlying
issue for both is the same:
In the FindSrc function apt chooses a new 'best hit', if either
* there is a target release and it matches the release of the package,
* or the version of the package is higher than the last best hit.
Consider having 1.0 (stable), 2.0 (unstable) and 1.5 (unstable),
in this order.
Looking for the version in stable, apt first selects 1.0, because the
release matches the target release, but then subsequently selects 2.0,
because the version is higher.
Looking for the version in unstable, apt first selects 2.0, because the
release matches the target release, but then subsequently selects 1.5,
because the release also matches the target release.
The correct way would be to choose a new 'best hit', if either
* there is a target release and it matches the release of the package,
* or there is no target release
and the version is higher than the last best hit.
Closes: 746412
Mail-Reference: <565A604B.7090104@googlemail.com>
Mail-Archive: https://lists.debian.org/debian-devel/2015/11/msg00470.html
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apt is supposed to be a user-friendly interface, so while these commands
are usually poweruser material and therefore do not need to be shown in
general introduction manpages/help messages its of no use to not allow
users to use them.
This includes clean, autoclean, build-dep, source, download, changelog,
depends, rdepends and showsrc – it doesn't include more non-interactive
commands like dump or xvcg as those are usually used by scripts if at
all.
Closes: 778234, 780700, 781237
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