swc-installation-test-2.py: Add OS-version detection

Using assorted functions from the `platform` module.  On my Linux box:

  $ python2.7
  Python 2.7.3 (default, Dec  5 2012, 10:56:01)
  [GCC 4.5.4] on linux2
  Type "help", "copyright", "credits" or "license" for more information.
  >>> import platform
  >>> platform.linux_distribution()
  ('Gentoo Base System', '2.1', '')
  >>> platform.mac_ver()
  ('', ('', '', ''), '')
  >>> platform.win32_ver()
  ('', '', '', '')

On an OS X box:

  $ python2.6
  Python 2.6.1 (r261:67515, Aug  2 2010, 20:10:18)
  [GCC 4.2.1 (Apple Inc. build 5646)] on darwin
  Type "help", "copyright", "credits" or "license" for more information.
  >>> import platform
  >>> platform.linux_distribution()
  ('', '', '')
  >>> platform.mac_ver()
  ('10.6.8', ('', '', ''), 'i386')
  >>> platform.win32_ver()
  ('', '', '', '')

I don't have access to an MS Windows box, but presumably it returns
something like:

  >>> platform.linux_distribution()
  ('', '', '')
  >>> platform.mac_ver()
  ('', ('', '', ''), '')
  >>> platform.win32_ver()
  ('XP', '5.1.2600', 'SP2', 'Multiprocessor Free')

We only want to print the one that applies (e.g. don't print a
'linux_distribution' entry on OS X), so we skip entries where value[0]
is an empty string.

diff --git a/swc-installation-test-2.py b/swc-installation-test-2.py
index f0ec903759d638a30be011a8a3f9501725a8983a..373230d64283d4f6bf18a63f3c5dafa7e6a35a8d 100755 (executable)
--- a/swc-installation-test-2.py
+++ b/swc-installation-test-2.py
@@ -471,7 +471,7 @@ for name,dependencies in [
 del name, dependencies  # cleanup namespace
 
 
-def _print_info(key, value, indent=13):
+def _print_info(key, value, indent=19):
     print('{0}{1}: {2}'.format(key, ' '*(indent-len(key)), value))
 
 def print_system_info():
@@ -486,6 +486,14 @@ def print_system_info():
     _print_info('os.uname', _platform.uname())
     _print_info('platform', _sys.platform)
     _print_info('platform+', _platform.platform())
+    for pversion in (
+            'linux_distribution',
+            'mac_ver',
+            'win32_ver',
+            ):
+        value = getattr(_platform, pversion)()
+        if value[0]:
+            _print_info(pversion, value)
     _print_info('prefix', _sys.prefix)
     _print_info('exec_prefix', _sys.exec_prefix)
     _print_info('executable', _sys.executable)