Trigger installation of missing components when installing a package
Review Request #102291 - Created Aug. 10, 2011 and discarded
This is another part of my GSoC 2011 work. For script engines, the existing metadata (X-Plasma-API) is sufficient. For data engines, we introduce a new metadata entry: X-Plasma-RequiredDataEngines. Third-party packages will have to add this entry to benefit from this feature at this time. Automatic support for scanning package source code on installation (at least for some languages) is planned, but the metadata entry is definitely the most efficient method.
Verified that it compiles without errors and that it successfully prompts for a missing Python script engine right after installing a Python widget (I used Veromix for my test) through KHNS (not only when actually using it) on Fedora 15. Also verified that there is no such prompt if plasma-scriptengine-python is already installed. (The patch is against master (4.8), but applies without changes to the kdelibs 4.6.5 in Fedora 15, which is how I tested it.)
Also verified that there is no such prompt if plasma-scriptengine-python is already installed. (I had forgotten to test this, but I've just tested it, and thankfully it works.)
if i read this correctly, this means that the name of the package on the system needs to be the name of the dataengine. e.g. org.kde.foobar or whatever. is that going to be ok for packagers? also, this work needs to shift to being written against the frameworks branch, and then only after libplasma2 has been merged into it. note that in libplasma2, there is no PackageMetadata class and the install package routine has moved into PackageStructure as well.