[jhbuild] [config] set required variables to make it work with the old start script

[Frederic Peters <fpeters src gnome org>]

commit 6b9a3f40c1dec10e2ccda5b5ec026e6e1159eb1b
Author: Frédéric Péters <fpeters 0d be>
Date:   Tue Jun 2 16:13:27 2009 +0200

    [config] set required variables to make it work with the old start script
    
    Following up on bug 582490 it now checks for ~/bin/ vs ~/.local/bin/ and
    display an informative message, plus it sets the new variables from what
    the old script put in sys.path so jhbuild can start correctly.
---
 jhbuild/config.py |   22 +++++++++++++++++++++-
 1 files changed, 21 insertions(+), 1 deletions(-)

diff --git a/jhbuild/config.py b/jhbuild/config.py
index 5a65b18..c286244 100644
--- a/jhbuild/config.py
+++ b/jhbuild/config.py
@@ -23,6 +23,7 @@ import sys
 import traceback
 import types
 import logging
+import __builtin__
 
 from jhbuild.errors import UsageError, FatalError, CommandError
 from jhbuild.utils.cmds import get_output
@@ -125,7 +126,26 @@ class Config:
         try:
             SRCDIR
         except NameError:
-            raise FatalError(_('Obsolete jhbuild start script, do run \'make install\''))
+            # this happens when an old jhbuild script is called
+            if os.path.realpath(sys.argv[0]) == os.path.expanduser('~/bin/jhbuild'):
+                # if it was installed in ~/bin/, it may be because the new one
+                # is installed in ~/.local/bin/jhbuild
+                if os.path.exists(os.path.expanduser('~/.local/bin/jhbuild')):
+                    logging.warning(
+                            _('JHBuild start script has been installed in '
+                              '~/.local/bin/jhbuild, you should remove the '
+                              'old version that is still in ~/bin/ (or make '
+                              'it a symlink to ~/.local/bin/jhbuild'))
+            if os.path.exists(os.path.join(sys.path[0], 'jhbuild')):
+                # the old start script inserted its source directory in
+                # sys.path, use it now to set new variables
+                __builtin__.__dict__['SRCDIR'] = sys.path[0]
+                __builtin__.__dict__['PKGDATADIR'] = None
+                __builtin__.__dict__['DATADIR'] = None
+            else:
+                raise FatalError(
+                    _('Obsolete jhbuild start script, make sure it is removed '
+                      'then do run \'make install\''))
 
         env_prepends.clear()
         try: