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     庵ﾆノ鄰ﾅｾﾃ     """distutils.command.check

Implements the Distutils 'check' command.
"""
from distutils.core import Command
from distutils.errors import DistutilsSetupError

try:
    # docutils is installed
    from docutils.utils import Reporter
    from docutils.parsers.rst import Parser
    from docutils import frontend
    from docutils import nodes

    class SilentReporter(Reporter):

        def __init__(self, source, report_level, halt_level, stream=None,
                     debug=0, encoding='ascii', error_handler='replace'):
            self.messages = []
            Reporter.__init__(self, source, report_level, halt_level, stream,
                              debug, encoding, error_handler)

        def system_message(self, level, message, *children, **kwargs):
            self.messages.append((level, message, children, kwargs))
            return nodes.system_message(message, level=level,
                                        type=self.levels[level],
                                        *children, **kwargs)

    HAS_DOCUTILS = True
except Exception:
    # Catch all exceptions because exceptions besides ImportError probably
    # indicate that docutils is not ported to Py3k.
    HAS_DOCUTILS = False

class check(Command):
    """This command checks the meta-data of the package.
    """
    description = ("perform some checks on the package")
    user_options = [('metadata', 'm', 'Verify meta-data'),
                    ('restructuredtext', 'r',
                     ('Checks if long string meta-data syntax '
                      'are reStructuredText-compliant')),
                    ('strict', 's',
                     'Will exit with an error if a check fails')]

    boolean_options = ['metadata', 'restructuredtext', 'strict']

    def initialize_options(self):
        """Sets default values for options."""
        self.restructuredtext = 0
        self.metadata = 1
        self.strict = 0
        self._warnings = 0

    def finalize_options(self):
        pass

    def warn(self, msg):
        """Counts the number of warnings that occurs."""
        self._warnings += 1
        return Command.warn(self, msg)

    def run(self):
        """Runs the command."""
        # perform the various tests
        if self.metadata:
            self.check_metadata()
        if self.restructuredtext:
            if HAS_DOCUTILS:
                self.check_restructuredtext()
            elif self.strict:
                raise DistutilsSetupError('The docutils package is needed.')

        # let's raise an error in strict mode, if we have at least
        # one warning
        if self.strict and self._warnings > 0:
            raise DistutilsSetupError('Please correct your package.')

    def check_metadata(self):
        """Ensures that all required elements of meta-data are supplied.

        Required fields:
            name, version, URL

        Recommended fields:
            (author and author_email) or (maintainer and maintainer_email)

        Warns if any are missing.
        """
        metadata = self.distribution.metadata

        missing = []
        for attr in ('name', 'version', 'url'):
            if not (hasattr(metadata, attr) and getattr(metadata, attr)):
                missing.append(attr)

        if missing:
            self.warn("missing required meta-data: %s"  % ', '.join(missing))
        if metadata.author:
            if not metadata.author_email:
                self.warn("missing meta-data: if 'author' supplied, " +
                          "'author_email' should be supplied too")
        elif metadata.maintainer:
            if not metadata.maintainer_email:
                self.warn("missing meta-data: if 'maintainer' supplied, " +
                          "'maintainer_email' should be supplied too")
        else:
            self.warn("missing meta-data: either (author and author_email) " +
                      "or (maintainer and maintainer_email) " +
                      "should be supplied")

    def check_restructuredtext(self):
        """Checks i