rundevel.py: add src to PYTHONPATH

rundevel.py

@@ -21,6 +21,7 @@
     sys.exit(__doc__)
 
 curdir = dirname(abspath(__file__))
+src = join(curdir, 'src')
 tmp = join(curdir, 'tmp')
 tmp2 = join(tmp, 'rundevel')
 if not exists(tmp):
@@ -30,9 +31,13 @@
 
 os.environ['ROBOT_SYSLOG_FILE'] = join(tmp, 'syslog.txt')
 os.environ['ROBOT_INTERNAL_TRACES'] = 'yes'
-os.environ['TEMPDIR'] = tmp2    # Used by tests under atest/testdata
+os.environ['TEMPDIR'] = tmp2          # Used by tests under atest/testdata
+if 'PYTHONPATH' not in os.environ:    # Allow executed scripts to import robot
+    os.environ['PYTHONPATH'] = src
+else:
+    os.environ['PYTHONPATH'] = os.pathsep.join([src, os.environ['PYTHONPATH']])
 
-sys.path.insert(0, join(curdir, 'src'))
+sys.path.insert(0, src)
 from robot import run_cli, rebot_cli
 
 if sys.argv[1] == 'rebot':
@@ -41,7 +46,8 @@
 else:
     runner = run_cli
     args = ['--pythonpath', join(curdir, 'atest', 'testresources', 'testlibs'),
-            '--pythonpath', tmp, '--loglevel', 'DEBUG']
+            '--pythonpath', tmp,
+            '--loglevel', 'DEBUG']
     args += sys.argv[2:] if sys.argv[1] == 'run' else sys.argv[1:]
 
 runner(['--outputdir', tmp] + args)