291 lines
8.6 KiB
Python
Executable File
291 lines
8.6 KiB
Python
Executable File
#!/usr/bin/env python
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# QAPI texi generator
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#
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# This work is licensed under the terms of the GNU LGPL, version 2+.
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# See the COPYING file in the top-level directory.
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"""This script produces the documentation of a qapi schema in texinfo format"""
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from __future__ import print_function
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import re
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import sys
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import qapi
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MSG_FMT = """
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@deftypefn {type} {{}} {name}
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{body}
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@end deftypefn
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""".format
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TYPE_FMT = """
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@deftp {{{type}}} {name}
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{body}
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@end deftp
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""".format
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EXAMPLE_FMT = """@example
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{code}
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@end example
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""".format
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def subst_strong(doc):
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"""Replaces *foo* by @strong{foo}"""
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return re.sub(r'\*([^*\n]+)\*', r'@strong{\1}', doc)
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def subst_emph(doc):
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"""Replaces _foo_ by @emph{foo}"""
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return re.sub(r'\b_([^_\n]+)_\b', r'@emph{\1}', doc)
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def subst_vars(doc):
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"""Replaces @var by @code{var}"""
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return re.sub(r'@([\w-]+)', r'@code{\1}', doc)
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def subst_braces(doc):
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"""Replaces {} with @{ @}"""
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return doc.replace('{', '@{').replace('}', '@}')
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def texi_example(doc):
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"""Format @example"""
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# TODO: Neglects to escape @ characters.
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# We should probably escape them in subst_braces(), and rename the
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# function to subst_special() or subs_texi_special(). If we do that, we
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# need to delay it until after subst_vars() in texi_format().
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doc = subst_braces(doc).strip('\n')
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return EXAMPLE_FMT(code=doc)
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def texi_format(doc):
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"""
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Format documentation
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Lines starting with:
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- |: generates an @example
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- =: generates @section
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- ==: generates @subsection
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- 1. or 1): generates an @enumerate @item
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- */-: generates an @itemize list
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"""
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ret = ''
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doc = subst_braces(doc)
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doc = subst_vars(doc)
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doc = subst_emph(doc)
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doc = subst_strong(doc)
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inlist = ''
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lastempty = False
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for line in doc.split('\n'):
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empty = line == ''
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# FIXME: Doing this in a single if / elif chain is
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# problematic. For instance, a line without markup terminates
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# a list if it follows a blank line (reaches the final elif),
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# but a line with some *other* markup, such as a = title
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# doesn't.
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#
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# Make sure to update section "Documentation markup" in
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# docs/devel/qapi-code-gen.txt when fixing this.
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if line.startswith('| '):
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line = EXAMPLE_FMT(code=line[2:])
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elif line.startswith('= '):
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line = '@section ' + line[2:]
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elif line.startswith('== '):
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line = '@subsection ' + line[3:]
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elif re.match(r'^([0-9]*\.) ', line):
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if not inlist:
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ret += '@enumerate\n'
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inlist = 'enumerate'
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ret += '@item\n'
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line = line[line.find(' ')+1:]
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elif re.match(r'^[*-] ', line):
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if not inlist:
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ret += '@itemize %s\n' % {'*': '@bullet',
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'-': '@minus'}[line[0]]
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inlist = 'itemize'
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ret += '@item\n'
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line = line[2:]
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elif lastempty and inlist:
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ret += '@end %s\n\n' % inlist
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inlist = ''
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lastempty = empty
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ret += line + '\n'
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if inlist:
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ret += '@end %s\n\n' % inlist
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return ret
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def texi_body(doc):
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"""Format the main documentation body"""
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return texi_format(doc.body.text)
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def texi_enum_value(value):
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"""Format a table of members item for an enumeration value"""
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return '@item @code{%s}\n' % value.name
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def texi_member(member, suffix=''):
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"""Format a table of members item for an object type member"""
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typ = member.type.doc_type()
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return '@item @code{%s%s%s}%s%s\n' % (
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member.name,
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': ' if typ else '',
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typ if typ else '',
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' (optional)' if member.optional else '',
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suffix)
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def texi_members(doc, what, base, variants, member_func):
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"""Format the table of members"""
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items = ''
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for section in doc.args.values():
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# TODO Drop fallbacks when undocumented members are outlawed
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if section.text:
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desc = texi_format(section.text)
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elif (variants and variants.tag_member == section.member
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and not section.member.type.doc_type()):
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values = section.member.type.member_names()
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members_text = ', '.join(['@t{"%s"}' % v for v in values])
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desc = 'One of ' + members_text + '\n'
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else:
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desc = 'Not documented\n'
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items += member_func(section.member) + desc
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if base:
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items += '@item The members of @code{%s}\n' % base.doc_type()
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if variants:
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for v in variants.variants:
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when = ' when @code{%s} is @t{"%s"}' % (
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variants.tag_member.name, v.name)
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if v.type.is_implicit():
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assert not v.type.base and not v.type.variants
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for m in v.type.local_members:
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items += member_func(m, when)
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else:
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items += '@item The members of @code{%s}%s\n' % (
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v.type.doc_type(), when)
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if not items:
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return ''
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return '\n@b{%s:}\n@table @asis\n%s@end table\n' % (what, items)
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def texi_sections(doc):
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"""Format additional sections following arguments"""
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body = ''
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for section in doc.sections:
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if section.name:
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# prefer @b over @strong, so txt doesn't translate it to *Foo:*
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body += '\n@b{%s:}\n' % section.name
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if section.name and section.name.startswith('Example'):
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body += texi_example(section.text)
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else:
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body += texi_format(section.text)
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return body
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def texi_entity(doc, what, base=None, variants=None,
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member_func=texi_member):
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return (texi_body(doc)
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+ texi_members(doc, what, base, variants, member_func)
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+ texi_sections(doc))
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class QAPISchemaGenDocVisitor(qapi.QAPISchemaVisitor):
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def __init__(self):
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self.out = None
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self.cur_doc = None
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def visit_begin(self, schema):
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self.out = ''
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def visit_enum_type(self, name, info, values, prefix):
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doc = self.cur_doc
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self.out += TYPE_FMT(type='Enum',
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name=doc.symbol,
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body=texi_entity(doc, 'Values',
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member_func=texi_enum_value))
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def visit_object_type(self, name, info, base, members, variants):
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doc = self.cur_doc
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if base and base.is_implicit():
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base = None
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self.out += TYPE_FMT(type='Object',
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name=doc.symbol,
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body=texi_entity(doc, 'Members', base, variants))
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def visit_alternate_type(self, name, info, variants):
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doc = self.cur_doc
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self.out += TYPE_FMT(type='Alternate',
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name=doc.symbol,
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body=texi_entity(doc, 'Members'))
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def visit_command(self, name, info, arg_type, ret_type,
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gen, success_response, boxed):
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doc = self.cur_doc
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if boxed:
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body = texi_body(doc)
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body += ('\n@b{Arguments:} the members of @code{%s}\n'
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% arg_type.name)
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body += texi_sections(doc)
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else:
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body = texi_entity(doc, 'Arguments')
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self.out += MSG_FMT(type='Command',
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name=doc.symbol,
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body=body)
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def visit_event(self, name, info, arg_type, boxed):
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doc = self.cur_doc
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self.out += MSG_FMT(type='Event',
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name=doc.symbol,
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body=texi_entity(doc, 'Arguments'))
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def symbol(self, doc, entity):
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if self.out:
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self.out += '\n'
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self.cur_doc = doc
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entity.visit(self)
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self.cur_doc = None
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def freeform(self, doc):
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assert not doc.args
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if self.out:
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self.out += '\n'
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self.out += texi_body(doc) + texi_sections(doc)
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def texi_schema(schema):
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"""Convert QAPI schema documentation to Texinfo"""
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gen = QAPISchemaGenDocVisitor()
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gen.visit_begin(schema)
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for doc in schema.docs:
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if doc.symbol:
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gen.symbol(doc, schema.lookup_entity(doc.symbol))
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else:
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gen.freeform(doc)
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return gen.out
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def main(argv):
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"""Takes schema argument, prints result to stdout"""
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if len(argv) != 2:
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print("%s: need exactly 1 argument: SCHEMA" % argv[0], file=sys.stderr)
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sys.exit(1)
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schema = qapi.QAPISchema(argv[1])
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if not qapi.doc_required:
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print("%s: need pragma 'doc-required' "
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"to generate documentation" % argv[0], file=sys.stderr)
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sys.exit(1)
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print(texi_schema(schema))
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if __name__ == '__main__':
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main(sys.argv)
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