Allow stg to be loaded in pydb and not run main()

This patch adds the __name__ == '__main__' condition to stg*. It also adds
a stg-dbg file that starts pdb before invoking main().

Signed-off-by: Catalin Marinas <catalin.marinas@gmail.com>

diff --git a/stg b/stg
index 5682dd4..def843c 100755 (executable)
--- a/stg
+++ b/stg
@@ -39,4 +39,5 @@ if bin == 'bin' and prefix != sys.prefix:
 
 from stgit.main import main
 
-main()
+if __name__ == '__main__':
+    main()

diff --git a/stg-dbg b/stg-dbg
new file mode 100755 (executable)
index 0000000..0c3ad39
--- /dev/null
+++ b/stg-dbg
@@ -0,0 +1,43 @@
+#!/usr/bin/env python
+# -*- python-mode -*-
+"""Takes care of starting the Init function
+"""
+
+__copyright__ = """
+Copyright (C) 2005, Catalin Marinas <catalin.marinas@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License version 2 as
+published by the Free Software Foundation.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+"""
+
+import sys, os, pdb
+
+# Try to detect where it is run from and set prefix and the search path.
+# It is assumed that the user installed StGIT using the --prefix= option
+prefix, bin = os.path.split(sys.path[0])
+
+if bin == 'bin' and prefix != sys.prefix:
+    sys.prefix = prefix
+    sys.exec_prefix = prefix
+
+    major, minor = sys.version_info[0:2]
+    local_path = [os.path.join(prefix, 'lib', 'python'),
+                  os.path.join(prefix, 'lib', 'python%s.%s' % (major, minor)),
+                  os.path.join(prefix, 'lib', 'python%s.%s' % (major, minor),
+                               'site-packages')]
+    sys.path = local_path + sys.path
+
+from stgit.main import main
+
+if __name__ == '__main__':
+    pdb.run('main()')

diff --git a/stg-prof b/stg-prof
index 8bbb623..de7bd13 100755 (executable)
--- a/stg-prof
+++ b/stg-prof
@@ -40,13 +40,14 @@ if bin == 'bin' and prefix != sys.prefix:
 
 from stgit.main import main
 
-start_time = time.time()
-def timer():
-    return time.time() - start_time
-
-prof = profile.Profile(timer)
-try:
-    prof.run('main()')
-except SystemExit:
-    pass
-pstats.Stats(prof).strip_dirs().sort_stats(-1).print_stats().print_callees()
+if __name__ == '__main__':
+    start_time = time.time()
+    def timer():
+        return time.time() - start_time
+
+    prof = profile.Profile(timer)
+    try:
+        prof.run('main()')
+    except SystemExit:
+        pass
+    pstats.Stats(prof).strip_dirs().sort_stats(-1).print_stats().print_callees()