support/scripts/check-uniq-files: run with Python 2.6

@@ -281,8 +281,3 @@ if [ -n "$missing_perl_modules" ] ; then
 	echo
 	exit 1
 fi
-
-if ! python -c "import argparse" > /dev/null 2>&1 ; then
-	echo "Your Python installation is not complete enough: argparse module is missing"
-	exit 1
-fi

@@ -1,31 +1,31 @@
 #!/usr/bin/env python
 
 import sys
-import argparse
+import optparse
 from collections import defaultdict
 
 warn = 'Warning: {0} file "{1}" is touched by more than one package: {2}\n'
 
 
 def main():
-    parser = argparse.ArgumentParser()
-    parser.add_argument('packages_file_list', nargs='*',
-                        help='The packages-file-list to check from')
-    parser.add_argument('-t', '--type', metavar="TYPE",
+    usage = 'usage: %prog -t TYPE <packages file list>'
+    parser = optparse.OptionParser(usage=usage)
+    parser.add_option('-t', '--type', metavar="TYPE",
                         help='Report as a TYPE file (TYPE is either target, staging, or host)')
 
-    args = parser.parse_args()
+    options, args = parser.parse_args()
 
-    if not len(args.packages_file_list) == 1:
-        sys.stderr.write('No packages-file-list was provided.\n')
+    if not len(args) == 1:
+        sys.stderr.write('No packages file list was provided.\n')
         return False
+    packages_file = args[0]
 
-    if args.type is None:
+    if options.type is None:
         sys.stderr.write('No type was provided\n')
         return False
 
     file_to_pkg = defaultdict(list)
-    with open(args.packages_file_list[0], 'rb') as pkg_file_list:
+    with open(packages_file, 'rb') as pkg_file_list:
         for line in pkg_file_list.readlines():
             pkg, _, file = line.rstrip(b'\n').partition(b',')
             file_to_pkg[file].append(pkg)

@@ -35,12 +35,12 @@ def main():
             # If possible, try to decode the binary strings with
             # the default user's locale
             try:
-                sys.stderr.write(warn.format(args.type, file.decode(),
+                sys.stderr.write(warn.format(options.type, file.decode(),
                                              [p.decode() for p in file_to_pkg[file]]))
             except UnicodeDecodeError:
                 # ... but fallback to just dumping them raw if they
                 # contain non-representable chars
-                sys.stderr.write(warn.format(args.type, file,
+                sys.stderr.write(warn.format(options.type, file,
                                              file_to_pkg[file]))