[tracker/sam/functional-tests-quiet: 8/18] utils/sandbox: Add --index-tmpdir option

[Sam Thursfield <sthursfield src gnome org>]

commit 4c3f12b77e4d3070a0e265d26d905e536621d2c1
Author: Sam Thursfield <sam afuera me uk>
Date:   Sat Aug 31 04:28:17 2019 +0300

    utils/sandbox: Add --index-tmpdir option
    
    This makes the tracker-sandbox utility more useful as a test harness.

 utils/sandbox/tracker-sandbox.py | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)
---
diff --git a/utils/sandbox/tracker-sandbox.py b/utils/sandbox/tracker-sandbox.py
index 687e2c48c..db24679f3 100755
--- a/utils/sandbox/tracker-sandbox.py
+++ b/utils/sandbox/tracker-sandbox.py
@@ -29,10 +29,11 @@ import locale
 import logging
 import os
 import shlex
+import shutil
 import signal
 import subprocess
 import sys
-import threading
+import tempfile
 
 from gi.repository import GLib
 
@@ -248,6 +249,9 @@ def argument_parser():
     parser.add_argument('-i', '--index', metavar='DIR', type=str,
                         default=default_index_location, dest='index_location',
                         help=f"directory to the index (default={default_index_location})")
+    parser.add_argument('--index-tmpdir', action='store_true',
+                        help="create index in a temporary directory and "
+                             "delete it on exit (useful for automated testing)")
     parser.add_argument('command', type=str, nargs='*', help="Command to run inside the shell")
 
     return parser
@@ -298,8 +302,18 @@ if __name__ == "__main__":
 
     verbosity = verbosity_as_int(args.verbosity)
 
+    index_location = None
+    index_tmpdir = None
+
+    if args.index_location != default_index_location and args.index_tmpdir:
+        raise RuntimeError("The --index-tmpdir flag is enabled, but --index= was also passed.")
+    if args.index_tmpdir:
+        index_location = index_tmpdir = tempfile.mkdtemp(prefix='tracker-sandbox')
+    else:
+        index_location = args.index_location
+
     # Set up environment variables and foo needed to get started.
-    dbus = environment_set(args.index_location, args.prefix, verbosity, dbus_config=args.dbus_config)
+    dbus = environment_set(index_location, args.prefix, verbosity, dbus_config=args.dbus_config)
     config_set()
 
     link_to_mime_data()
@@ -316,3 +330,5 @@ if __name__ == "__main__":
             os.system(shell)
     finally:
         environment_unset(dbus)
+        if index_tmpdir:
+            shutil.rmtree(index_tmpdir, ignore_errors=True)