D9960: Query os-release for distro name

[Antonio Rojas]

arojas created this revision.
arojas added a reviewer: apol.
Restricted Application added a project: Plasma.
Restricted Application added a subscriber: plasma-devel.
arojas requested review of this revision.

REVISION SUMMARY
  Look for the distro name in /etc/os-release and /usr/lib/os-release instead of relying on the external lsb-release tool, which may not be installed on the system (it is not in Arch by default). The lsb-release method is kept as a fallback.

TEST PLAN
  Distro name is displayed correctly in the sources list in Arch Linux without lsb-release installed

REPOSITORY
  R134 Discover Software Store

REVISION DETAIL
  https://phabricator.kde.org/D9960

AFFECTED FILES
  libdiscover/backends/PackageKitBackend/PackageKitBackend.cpp

To: arojas, apol
Cc: plasma-devel, ZrenBot, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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