pactest: run with root in /tmp and clean up automatically

This moves the generated root/ directory into /tmp, or at least a path
returned by tempfile.mkdtemp(), by default. This can make test runs
significantly faster if done when /tmp is a tmpfs.

If you are debugging a failed test, use the new --keep-root option to
not clean up and pactest will print the location of the generated root/
test directory.

Signed-off-by: Dan McGee <dan@archlinux.org>

Makefile.am

@@ -21,7 +21,6 @@ check-local: test/pacman test/util src/pacman src/util
 	$(PYTHON) $(top_srcdir)/test/pacman/pactest.py --debug=1 \
 		--test $(top_srcdir)/test/pacman/tests/*.py \
 		-p $(top_builddir)/src/pacman/pacman
-	rm -rf $(top_builddir)/root
 	$(SH) $(top_srcdir)/test/util/vercmptest.sh \
 		$(top_builddir)/src/util/vercmp
 

test/pacman/pactest.py

@@ -17,8 +17,12 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-import os, sys, glob
+import glob
 from optparse import OptionParser
+import os
+import shutil
+import sys
+import tempfile
 
 import pmenv
 import util
@@ -63,6 +67,9 @@ def createOptParser():
     parser.add_option("-t", "--test", action = "callback",
                       callback = globTests, dest = "testcases",
                       help = "specify test case(s)")
+    parser.add_option("--keep-root", action = "store_true",
+                      dest = "keeproot", default = False,
+                      help = "don't remove the generated pacman root filesystem")
     parser.add_option("--nolog", action = "store_true",
                       dest = "nolog", default = False,
                       help = "do not log pacman messages")
@@ -80,7 +87,8 @@ def createOptParser():
  
 if __name__ == "__main__":
     # instantiate env and parser objects 
-    env = pmenv.pmenv()
+    root_path = tempfile.mkdtemp()
+    env = pmenv.pmenv(root=root_path)
     opt_parser = createOptParser()
     (opts, args) = opt_parser.parse_args()
 
@@ -95,8 +103,9 @@ if __name__ == "__main__":
 
     if opts.testcases is None or len(opts.testcases) == 0:
         print "no tests defined, nothing to do"
+        os.rmdir(root_path)
         sys.exit(2)
-    else:
+
     for i in opts.testcases:
         env.addtest(i)
 
@@ -107,4 +116,9 @@ if __name__ == "__main__":
     if env.failed > 0:
         sys.exit(1)
 
+    if not opts.keeproot:
+        shutil.rmtree(root_path)
+    else:
+        print "pacman testing root saved: %s" % root_path
+
 # vim: set ts=4 sw=4 et: