This syncs up the field names between the fdroiddata .yml files, the keys
used in the implementation in fdroidserver, the index data format, and the
final data structures in fdroidclient. This makes it easier for devs to
follow, and makes the Jackson parsing library automatically handle
converting the data from the index file to Java instances.
This bumps the metadata version since the apkcache will have to be
discarded.
Here are the name changes:
* apkname --> apkName
* id --> packageName
* sha256 --> hash
* version --> versionName
* versioncode --> versionCode
tests/repo/index.xml was changed only to bump the metadata version
from 17 to 18.
JSON and YAML are very closely related, so supporting both of them is
basically almost no extra work. Both are also closely related to how
Python works with dicts and pickles. XML is a very different beast, and its
not popular for this kind of thing anyway, so just purge it.
The start up sequence of processes that are based on the .fdroid.* metadata
is a bit different, so this ensures that the environment variables get
properly initialized in all cases.
This also creates a single function where the environment is set. Before
it was being set in multiple places across multiple files.
Using the same JDK throughout should prevent weird bugs where a setup might
use Java8's jarsigner and Java7's keytool. This also allows the user to
set java_paths and have jarsigner and keytool used from that specified JDK.
This incorporates almost all of the patch that is in the Debian package
that forces fdroidserver to use the default JDK on that Debian release.
closes#93https://gitlab.com/fdroid/fdroidserver/issues/93
