[tracker/sam/tracker-2.3-developer-experience: 45/45] Add TRACKER_MINER_SERVICES_DIR environment variable

[Sam Thursfield <sthursfield src gnome org>]

commit 4dbda4376bf18127d7effc2476a2ceec4b9f2c84
Author: Sam Thursfield <sam afuera me uk>
Date:   Sun Sep 29 17:23:49 2019 +0200

    Add TRACKER_MINER_SERVICES_DIR environment variable
    
    This is needed to make certain Tracker commands work when running
    Tracker from the build tree, without installing it (as we do for
    the functional-tests and with the new run-uninstalled script).
    
    Without it, `tracker daemon status` and `tracker index` will look
    for .service files in $prefix/share/tracker/miners which may fail.

 src/libtracker-control/tracker-miner-manager.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)
---
diff --git a/src/libtracker-control/tracker-miner-manager.c b/src/libtracker-control/tracker-miner-manager.c
index 740eae30d..c68be8d03 100644
--- a/src/libtracker-control/tracker-miner-manager.c
+++ b/src/libtracker-control/tracker-miner-manager.c
@@ -820,9 +820,16 @@ static void
 initialize_miners_data (TrackerMinerManager *manager)
 {
        GFile *file;
+       const gchar *miners_dir;
+
+       if (g_getenv("TRACKER_MINER_SERVICES_DIR") != NULL) {
+               miners_dir = g_getenv("TRACKER_MINER_SERVICES_DIR");
+       } else {
+               miners_dir = TRACKER_MINERS_DIR;
+       }
 
        /* Go through service files */
-       file = g_file_new_for_path (TRACKER_MINERS_DIR);
+       file = g_file_new_for_path (miners_dir);
        directory_foreach (file, ".service", (GFunc) check_file, manager);
        g_object_unref (file);
 }