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Include that apt is being run from a service in the user
agent, so traffic can be analysed for interactive vs
non-interactive use, and prioritised accordingly.
It looks like this now:
User-Agent: Debian APT-HTTP/1.3 (2.0.1) non-interactive
A previous version included the full service names, but this
raised some privacy concerns.
LP: #1825000
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If pkgAcqChangelog is told to acquire the changelog for a version it
will check first if this version is installed on the disk and if so will
use the local changelog in /usr/share/doc (possibily/likely gz
compressed) instead of downloading the file from the web.
An option is provided to disable this, which is enabled by default for
the Ubuntu vendor as they truncate the local changelogs – and for apts
--print-uris action.
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Having two different formats in the same file is very dirty and causes
external tools to fail hard trying to parse them. It is probably not a
good idea for them to parse them in the first place, but they do and we
shouldn't break them if there is a better way.
So we solve this issue for now by giving our deb822 format a new
filename extension ".sources" which unsupporting applications are likely
to ignore an can begin gradually moving forward rather than waiting for
the unknown applications to catch up.
Currently and for the forseeable future apt is going to support both
with the same feature set as documented in the manpage, with the
longtime plan of adopting the 'new' format as default, but that is a
long way to go and might get going more from having an easier time
setting options than from us pushing it explicitely.
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Provided is a specialized acquire item which given a version can figure
out the correct URI to try by itself and if not provides an error
message alongside with static methods to get just the URI it would try
to download if it should just be displayed or similar such.
The URI is constructed as follows:
Release files can provide an URI template in the "Changelogs" field,
otherwise we lookup a configuration item based on the "Label" or
"Origin" of the Release file to get a (hopefully known) default value
for now. This template should contain the string CHANGEPATH which is
replaced with the information about the version we want the changelog
for (e.g. main/a/apt/apt_1.1). This middleway was choosen as this path
part was consistent over the three known implementations (+1 defunct),
while the rest of the URI varies widely between them.
The benefit of this construct is that it is now easy to get changelogs
for Debian packages on Ubuntu and vice versa – even at the moment where
the Changelogs field is present nowhere. Strictly better than what
apt-get had before as it would even fail to get changelogs from
security… Now it will notice that security identifies as Origin: Debian
and pick this setting (assuming again that no Changelogs field exists).
If on the other hand security would ship its changelogs in a different
location we could set it via the Label option overruling Origin.
Closes: 687147, 739854, 784027, 787190
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Vendors like ubuntu need to change some options, so giving them
a way to do this less painfully avoids reducing differences.
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It can be useful to have a whole makefile available for vendor setup,
but by providing a basic one we can deal with the simple cases more
easily (and changes to the system are presumably easier).
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The apt-key script uses quiet a few keyring files for operation which
are specific to the distribution it is build on and is hence one of the
most patched parts – even if it is not that often used anymore now that
a fragment directory for trusted.gpg exists.
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Adds a small helper to extract the small information bits we store in
apt-vendor.ent and uses it in debian/rules to set apt:keyring as a
substvar for debian/control populated with the &keyring-package; info
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manpages sometimes refer to distro-specific things like the name of the
package providing the achive-keyring. Having a central place to
configure this helps in having it consistent in the manpages and allows
to load this info from other places in the buildsystem as well later.
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Many derivatives make quiet a few simple changes to apt introducing
silly diffs just to change examples and co making it harder for
them to update apt and harder for us to merge real changes back.
First stop: doc/examples/sources.list
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