/silverlining/mgr-scripts/run-command.py

 1#!/usr/bin/env python
 2import sys
 3sys.path.insert(0, '/usr/local/share/silverlining/lib')
 4import os
 5from silversupport import appdata
 6from silversupport.appconfig import AppConfig
 7
 8
 9def main():
10    args = sys.argv[1:]
11    hostname, path = appdata.normalize_location(args[0])
12    tmp_dir = args[1]
13    command = args[2]
14    rest = args[3:]
15    instance_name = appdata.instance_for_location(hostname, path)
16    if not instance_name:
17        print 'No instance found attached to %s%s' % (hostname, path)
18        return 1
19    app_config = AppConfig.from_instance_name(instance_name)
20
21    if tmp_dir and tmp_dir != 'NONE':
22        rest = [
23            r.replace('$TMP', tmp_dir)
24            for r in rest]
25    path = find_command_path(app_config.app_dir, command)
26    check_command_python(path)
27    os.environ['SILVER_VERSION'] = 'silverlining/0.0'
28    app_config.activate_services()
29    app_config.activate_path()
30    # Buffering can happen because this isn't obviously hooked up to a
31    # terminal (even though it is indirectly):
32    sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)
33    sys.argv = [path] + rest
34    os.chdir(app_config.app_dir)
35    ns = {'__file__': path, '__name__': '__main__'}
36    if os.path.basename(path) == 'ipython':
37        ## ipython-specific hack
38        if not os.access(os.environ['HOME'], os.W_OK):
39            os.environ['HOME'] = '/tmp'
40    os.chdir(app_config.app_dir)
41    if os.path.basename(path) in ('python', 'python2.6'):
42        from code import InteractiveConsole
43        console = InteractiveConsole()
44        console.interact()
45    else:
46        execfile(path, ns)
47
48
49def find_command_path(app_dir, command_name):
50    if command_name.startswith(os.path.sep):
51        # Absolute path
52        return command_name
53    places = [os.path.join(app_dir, 'bin'),
54              app_dir,
55              '/bin',
56              '/usr/bin']
57    for place in places:
58        place = os.path.join(place, command_name)
59        if os.path.exists(place):
60            return place
61    print >> sys.stderr, (
62        "%s not found (looked in %s)"
63        % (command_name, ', '.join(places)))
64    sys.exit(1000)
65
66
67def check_command_python(path):
68    if path.endswith('.py'):
69        # Good enough
70        return
71    if path.endswith('python') or path.endswith('python2.6'):
72        return
73    fp = open(path)
74    first = fp.readline()
75    fp.close()
76    if not first.startswith('#!'):
77        print >> sys.stderr, (
78            "Not a #! script: %s" % path)
79        sys.exit(1001)
80    if not 'python' in first:
81        print >> sys.stderr, (
82            "#! line in script is not for Python (%s): %s"
83            % (first.strip(), path))
84        sys.exit(1001)
85
86
87if __name__ == '__main__':
88    sys.exit(main())