Remove some 'auto' build options

See merge request !409

Dissolve libtracker-miner

See merge request !435

There's no longer a libtracker-miner to relate to. These tests largely
focus on the filesystem miner too.

All remaining objects there are only used by the tracker-miner-fs-3
executable. Move everything together, so there's no internal library
API barrier, and refactors get easier.

Note that these files are still built in a static library, in order
to help direct usage from the test suite.

This became unused when libtracker-miner stopped being a public
library.

These became unused when libtracker-miner stopped being a
public library.

Move it out of the libtracker-miner folder.

This is no longer necessary from this executable, all shared objects
live in libtracker-miners-common.

This is only used by TrackerMinerOnline which just moved to this
executable as well.

This is the only executable making use of this libtracker-miner object,
move it here.

This is no longer necessary for this executable.

These objects are only used by the tracker-extract executable.
Move them there.

This library is already linked from all miners, and this object simply
wraps a TrackerMiner so it is exposed via a D-Bus object/interface.

This library is already linked from all miners, and this is a minimal
base implementation that simply ties the miner object to a
TrackerSparqlConnection.

tests: Add a bunch of extractor tests

See merge request !434

Add some files to increase test coverage of extractor modules.
Some were created with the help of apps, others hand crafted from
these, others collected from external sources.

Some extractor fixes

See merge request !430

Since we are using g_*_source_new() API to attach the source
to non-default main contexts, we cannot use g_source_remove()
to remove its ID, but must g_source_destroy() the GSource to
detach it from the main loop.

This property has maximum cardinality of 1, but we are adding (not
resetting) the relation here. Set the property in order to ensure
all previous values are removed.

The flac-musicbrainz test needed updates in the expected results,
since it interpreted nfo:hasHash as having unlimited cardinality
like the extractor did.

build: Avoid '+' for concatenation of dependencies

See merge request !431

This is something only officially supported in meson >= 0.60, but
we just require 0.51 here.

Fixes for extractor tests

See merge request !432

Since all JSON-LD has a "@graph" root object, we need adapting
test code dealing with JSON-LD output to observe/skip it.

There's slight changes in the way we format JSON-LD being produced by
tracker-extract, adapt the tests to these changes.

tracker-extract: Drop the correct midi plugin name from the GST registry

Closes #249

See merge request !429

Commit 2425ed05 attempted to drop fluidsynth GStreamer plugin which tries
to access hardware devices during metadata extraction and triggers the
seccomp jail. However the wrong name was pulled here, we should use the
name of the plugin itself, not the decoder element.

Fixes: 2425ed05 - tracker-extract: Avoid the fluiddec gstreamer plugin

Closes: #249

tracker-miner-fs: Delegate TrackerEndpoint to a separate thread

Closes tracker#382

See merge request !428

libtracker-miners-common: Include btrfs subvolume in stable identifiers

See merge request !427

This is a very gratuituous indentation style fix so that the
tracker:extractorHash for all files change and a reindex is
issued.

This is necessary since stable identifiers for file content
may have changed in some circumstances.

If the stable identifier changes for a folder, we may end up with stale
nie:interpretedAs links to it. Since we don't allow symlinks or other loops
in the filesystem, it's safe to assume the nie:DataObject/nie:InformationElement
will be 1:1 for folders.

The TrackerEndpointDBus set up here dispatches the incoming D-Bus
requests in the main context that is thread default at the time
of creating the endpoint. Currently this is the main thread, so
incoming SPARQL queries coming from external users might be delayed
by other miner activity (such as handling filesystem changes).

Move it to a separate dedicated thread, so that external SPARQL
queries are unimpeded by main thread activity. The underlying
TrackerSparqlConnection object handling both internal and external
queries can be used from any thread.

Closes: tracker#382

We would mistakenly resort to the parent mountpoint identifier, instead
of the one belonging to the directory itself.

In the case of a btrfs partition with multiple subvolumes, we will
create the stable identifiers based on the mountpoint device name,
this falls short if multiple mountpoint entries exist for the same
partition and different subvolumes.

Make the subvolume name part of the stable identifier, so that
we can distinguish between subvolumes of a single partition.

Cleanup libtracker-miners-common

See merge request !425

These weren't used in real code, and just some in tests.

This API is only exercised in tests, get rid of it.