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import argparse |
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import datetime |
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from distutils.core import Command |
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from distutils.errors import DistutilsOptionError |
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class BuildManPage(Command): |
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""" |
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Add a ``build_manpage`` command to your setup.py. |
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To use this Command class add a command to call this class:: |
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# For setuptools |
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setup( |
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entry_points={ |
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"distutils.commands": [ |
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"build_manpage = coalib.misc.BuildManPage:BuildManPage" |
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] |
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} |
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) |
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# For distutils |
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from coalib.misc.BuildManPage import BuildManPage |
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setup( |
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cmdclass={'build_manpage': BuildManPage} |
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) |
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You can then use the following setup command to produce a man page:: |
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$ python setup.py build_manpage --output=coala.1 \ |
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--parser=coalib.parsing.DefaultArgParser:default_arg_parser |
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If automatically want to build the man page every time you invoke |
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your build, add to your ```setup.cfg``` the following:: |
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[build_manpage] |
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output = <appname>.1 |
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parser = <path_to_your_parser> |
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""" |
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user_options = [ |
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('output=', 'O', 'output file'), |
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('parser=', None, 'module path to an ArgumentParser instance' |
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'(e.g. mymod:func, where func is a method or function which return' |
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'an arparse.ArgumentParser instance.'), |
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] |
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def initialize_options(self): |
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self.output = None |
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self.parser = None |
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def finalize_options(self): |
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if self.output is None: |
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raise DistutilsOptionError('\'output\' option is required') |
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if self.parser is None: |
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raise DistutilsOptionError('\'parser\' option is required') |
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mod_name, func_name = self.parser.split(':') |
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fromlist = mod_name.split('.') |
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mod = __import__(mod_name, fromlist=fromlist) |
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self._parser = ( |
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getattr(mod, func_name)(formatter_class=ManPageFormatter)) |
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self.announce('Writing man page %s' % self.output) |
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self._today = datetime.date.today() |
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def run(self): |
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dist = self.distribution |
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homepage = dist.get_url() |
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maintainer = dist.get_maintainer() |
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_license = dist.get_license() |
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appname = self._parser.prog |
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sections = {"see also": ("Online documentation: {}".format(homepage)), |
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"maintainer(s)": maintainer, |
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"license": _license} |
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dist = self.distribution |
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mpf = ManPageFormatter(appname, |
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desc=dist.get_description(), |
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long_desc=dist.get_long_description(), |
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ext_sections=sections, |
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parser=self._parser) |
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formatted_man_page = mpf.format_man_page() |
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with open(self.output, 'w') as man_file: |
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man_file.write(formatted_man_page) |
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class ManPageFormatter(argparse.HelpFormatter): |
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def __init__(self, |
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prog, |
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indent_increment=2, |
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max_help_position=24, |
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width=None, |
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desc=None, |
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long_desc=None, |
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ext_sections=None, |
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parser=None): |
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argparse.HelpFormatter.__init__(self, prog) |
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self._prog = prog |
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self._section = 1 |
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self._today = datetime.date.today().strftime('%Y\\-%m\\-%d') |
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self._desc = desc |
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self._long_desc = long_desc |
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self._ext_sections = ext_sections |
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self._parser = parser |
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def _format_action_invocation(self, action): |
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if not action.option_strings: |
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metavar, = self._metavar_formatter(action, action.dest)(1) |
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return metavar |
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else: |
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# if the Optional doesn't take a value, format is: |
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# -s, --long |
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if action.nargs == 0: |
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parts = [ManPageFormatter._bold(action_str) |
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for action_str in action.option_strings] |
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# if the Optional takes a value, format is: |
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# -s ARGS, --long ARGS |
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else: |
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default = ManPageFormatter._underline(action.dest.upper()) |
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args_string = self._format_args(action, default) |
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parts = ['%s %s' % (self._bold(option_string), args_string) |
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for option_string in action.option_strings] |
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return ', '.join(parts) |
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@staticmethod |
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def _markup(string): |
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return string.replace('-', '\\-') |
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@staticmethod |
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def _add_format(string, front, back): |
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if not string.strip().startswith(front): |
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string = front + string |
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if not string.strip().endswith(back): |
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string = string + back |
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return string |
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@staticmethod |
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def _underline(string): |
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return ManPageFormatter._add_format(string, "\\fI", "\\fR") |
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@staticmethod |
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def _bold(string): |
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return ManPageFormatter._add_format(string, "\\fB", "\\fR") |
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def _mk_title(self): |
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return '.TH {0} {1} {2}\n'.format(self._prog, |
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self._section, |
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self._today) |
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def _mk_name(self): |
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return '.SH NAME\n%s\n' % (self._parser.prog) |
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def _mk_synopsis(self): |
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self.add_usage(self._parser.usage, |
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self._parser._actions, |
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self._parser._mutually_exclusive_groups, |
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prefix='') |
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usage = self._format_usage(None, |
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self._parser._actions, |
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self._parser._mutually_exclusive_groups, |
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'') |
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usage = usage.replace('%s ' % self._prog, '') |
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usage = ('.SH SYNOPSIS\n \\fB%s\\fR %s\n' |
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% (ManPageFormatter._markup(self._prog), usage)) |
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return usage |
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def _mk_description(self): |
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if self._long_desc: |
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long_desc = self._long_desc.replace('\n', '\n.br\n') |
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return '.SH DESCRIPTION\n%s\n' % self._markup(long_desc) |
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else: |
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return '' |
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def _mk_options(self): |
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formatter = self._parser._get_formatter() |
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# positionals, optionals and user-defined groups |
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for action_group in self._parser._action_groups: |
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formatter.start_section(None) |
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formatter.add_text(None) |
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formatter.add_arguments(action_group._group_actions) |
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formatter.end_section() |
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# epilog |
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formatter.add_text(self._parser.epilog) |
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# determine help from format above |
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return '.SH OPTIONS\n' + formatter.format_help() |
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def _mk_footer(self): |
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sections = self._ext_sections |
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if not hasattr(sections, '__iter__'): |
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return '' |
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footer = [] |
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for section in sorted(sections.keys()): |
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part = ".SH {}\n {}".format(section.upper(), sections[section]) |
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footer.append(part) |
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return '\n'.join(footer) |
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def format_man_page(self): |
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page = [] |
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page.append(self._mk_title()) |
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page.append(self._mk_name()) |
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page.append(self._mk_synopsis()) |
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page.append(self._mk_description()) |
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page.append(self._mk_options()) |
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page.append(self._mk_footer()) |
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return ''.join(page) |
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