def main()

in tools/hook-scripts/svn2feed.py [0:0]

• 98 lines of code
• 28 McCabe index (conditional complexity)

def main():
    # Parse the command-line options and arguments.
    try:
        opts, args = getopt.gnu_getopt(sys.argv[1:], "hP:r:u:f:m:U:F:",
                                       ["help",
                                        "svn-path=",
                                        "revision=",
                                        "item-url=",
                                        "feed-file=",
                                        "max-items=",
                                        "feed-url=",
                                        "format=",
                                        ])
    except getopt.GetoptError as msg:
        usage_and_exit(msg)

    # Make sure required arguments are present.
    if len(args) != 1:
        usage_and_exit("You must specify a repository path.")
    repos_path = os.path.abspath(args[0])

    # Now deal with the options.
    max_items = 20
    commit_rev = svn_path = None
    item_url = feed_url = None
    feed_file = None
    feedcls = None
    feed_classes = { 'rss': Svn2RSS, 'atom': Svn2Atom }

    for opt, arg in opts:
        if opt in ("-h", "--help"):
            usage_and_exit()
        elif opt in ("-P", "--svn-path"):
            svn_path = arg
        elif opt in ("-r", "--revision"):
            commit_rev = arg
        elif opt in ("-u", "--item-url"):
            item_url = arg
            check_url(item_url, opt)
        elif opt in ("-f", "--feed-file"):
            feed_file = arg
        elif opt in ("-m", "--max-items"):
            try:
               max_items = int(arg)
            except ValueError as msg:
               usage_and_exit("Invalid value '%s' for --max-items." % (arg))
            if max_items < 1:
               usage_and_exit("Value for --max-items must be a positive "
                              "integer.")
        elif opt in ("-U", "--feed-url"):
            feed_url = arg
            check_url(feed_url, opt)
        elif opt in ("-F", "--format"):
            try:
                feedcls = feed_classes[arg]
            except KeyError:
                usage_and_exit("Invalid value '%s' for --format." % arg)

    if feedcls is None:
        usage_and_exit("Option -F [--format] is required.")

    if item_url is None:
        usage_and_exit("Option -u [--item-url] is required.")

    if feed_url is None:
        usage_and_exit("Option -U [--feed-url] is required.")

    if commit_rev is None:
        svnlook_cmd = 'svnlook'
        if svn_path is not None:
            svnlook_cmd = os.path.join(svn_path, 'svnlook')
        cmd = [svnlook_cmd, 'youngest', repos_path]
        proc = subprocess.Popen(cmd, stdout=subprocess.PIPE)
        proc.wait()
        cmd_out = proc.stdout.readlines()
        try:
            revisions = [int(cmd_out[0])]
        except IndexError as msg:
            usage_and_exit("svn2feed.py: Invalid value '%s' for " \
                           "REPOS-PATH" % (repos_path))
    else:
        try:
            rev_range = commit_rev.split(':')
            len_rev_range = len(rev_range)
            if len_rev_range == 1:
                revisions = [int(commit_rev)]
            elif len_rev_range == 2:
                start, end = rev_range
                start = int(start)
                end = int(end)
                if (start > end):
                    tmp = start
                    start = end
                    end = tmp
                revisions = list(range(start, end + 1)[-max_items:])
            else:
                raise ValueError()
        except ValueError as msg:
            usage_and_exit("svn2feed.py: Invalid value '%s' for --revision." \
                           % (commit_rev))

    if feed_file is None:
        feed_file = (os.path.basename(repos_path) +
                     feedcls.get_default_file_extension())

    feed = feedcls(svn_path, repos_path, item_url, feed_file, max_items,
                   feed_url)
    for revision in revisions:
        feed.add_revision_item(revision)
    feed.write_output()