Bug 1008943 - mozinfo should be cheaper to import. r=ahal

testing/mozbase/mozinfo/mozinfo/mozinfo.py

@@ -8,16 +8,11 @@
 # linux) to the information; I certainly wouldn't want anyone parsing this
 # information and having behaviour depend on it
 
-import ctypes
-import errno
-import json
 import os
 import platform
 import re
 import sys
 
-import mozfile
-
 # keep a copy of the os module since updating globals overrides this
 _os = os
 
@@ -97,6 +92,8 @@ info.update({'processor': processor,
             })
 
 if info['os'] == 'linux':
+    import ctypes
+    import errno
     PR_SET_SECCOMP = 22
     SECCOMP_MODE_FILTER = 2
     ctypes.CDLL("libc.so.6", use_errno=True).prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, 0)
@@ -132,6 +129,9 @@ def update(new_info):
     """
 
     if isinstance(new_info, basestring):
+        # lazy import
+        import mozfile
+        import json
         f = mozfile.load(new_info)
         new_info = json.loads(f.read())
         f.close()
@@ -207,6 +207,8 @@ def main(args=None):
 
     # args are JSON blobs to override info
     if args:
+        # lazy import
+        import json
         for arg in args:
             if _os.path.exists(arg):
                 string = file(arg).read()