3 # This work is licensed under the terms of the GNU LGPL, version 2+.
4 # See the COPYING file in the top-level directory.
5 """This script produces the documentation of a qapi schema in texinfo format"""
8 from qapi.gen import QAPIGenDoc, QAPISchemaVisitor
12 @deftypefn {type} {{}} {name}
14 {body}{members}{features}{sections}
20 @deftp {{{type}}} {name}
22 {body}{members}{features}{sections}
27 EXAMPLE_FMT = """@example
33 def subst_strong(doc):
34 """Replaces *foo* by @strong{foo}"""
35 return re.sub(r'\*([^*\n]+)\*', r'@strong{\1}', doc)
39 """Replaces _foo_ by @emph{foo}"""
40 return re.sub(r'\b_([^_\n]+)_\b', r'@emph{\1}', doc)
44 """Replaces @var by @code{var}"""
45 return re.sub(r'@([\w-]+)', r'@code{\1}', doc)
48 def subst_braces(doc):
49 """Replaces {} with @{ @}"""
50 return doc.replace('{', '@{').replace('}', '@}')
53 def texi_example(doc):
55 # TODO: Neglects to escape @ characters.
56 # We should probably escape them in subst_braces(), and rename the
57 # function to subst_special() or subs_texi_special(). If we do that, we
58 # need to delay it until after subst_vars() in texi_format().
59 doc = subst_braces(doc).strip('\n')
60 return EXAMPLE_FMT(code=doc)
68 - |: generates an @example
69 - =: generates @section
70 - ==: generates @subsection
71 - 1. or 1): generates an @enumerate @item
72 - */-: generates an @itemize list
75 doc = subst_braces(doc)
78 doc = subst_strong(doc)
81 for line in doc.split('\n'):
84 # FIXME: Doing this in a single if / elif chain is
85 # problematic. For instance, a line without markup terminates
86 # a list if it follows a blank line (reaches the final elif),
87 # but a line with some *other* markup, such as a = title
90 # Make sure to update section "Documentation markup" in
91 # docs/devel/qapi-code-gen.txt when fixing this.
92 if line.startswith('| '):
93 line = EXAMPLE_FMT(code=line[2:])
94 elif line.startswith('= '):
95 line = '@section ' + line[2:]
96 elif line.startswith('== '):
97 line = '@subsection ' + line[3:]
98 elif re.match(r'^([0-9]*\.) ', line):
100 ret += '@enumerate\n'
103 line = line[line.find(' ')+1:]
104 elif re.match(r'^[*-] ', line):
106 ret += '@itemize %s\n' % {'*': '@bullet',
107 '-': '@minus'}[line[0]]
111 elif lastempty and inlist:
112 ret += '@end %s\n\n' % inlist
119 ret += '@end %s\n\n' % inlist
124 """Format the main documentation body"""
125 return texi_format(doc.body.text)
128 def texi_if(ifcond, prefix='\n', suffix='\n'):
129 """Format the #if condition"""
132 return '%s@b{If:} @code{%s}%s' % (prefix, ', '.join(ifcond), suffix)
135 def texi_enum_value(value, desc, suffix):
136 """Format a table of members item for an enumeration value"""
137 return '@item @code{%s}\n%s%s' % (
138 value.name, desc, texi_if(value.ifcond, prefix='@*'))
141 def texi_member(member, desc, suffix):
142 """Format a table of members item for an object type member"""
143 typ = member.type.doc_type()
144 membertype = ': ' + typ if typ else ''
145 return '@item @code{%s%s}%s%s\n%s%s' % (
146 member.name, membertype,
147 ' (optional)' if member.optional else '',
148 suffix, desc, texi_if(member.ifcond, prefix='@*'))
151 def texi_members(doc, what, base=None, variants=None,
152 member_func=texi_member):
153 """Format the table of members"""
155 for section in doc.args.values():
156 # TODO Drop fallbacks when undocumented members are outlawed
158 desc = texi_format(section.text)
159 elif (variants and variants.tag_member == section.member
160 and not section.member.type.doc_type()):
161 values = section.member.type.member_names()
162 members_text = ', '.join(['@t{"%s"}' % v for v in values])
163 desc = 'One of ' + members_text + '\n'
165 desc = 'Not documented\n'
166 items += member_func(section.member, desc, suffix='')
168 items += '@item The members of @code{%s}\n' % base.doc_type()
170 for v in variants.variants:
171 when = ' when @code{%s} is @t{"%s"}%s' % (
172 variants.tag_member.name, v.name, texi_if(v.ifcond, " (", ")"))
173 if v.type.is_implicit():
174 assert not v.type.base and not v.type.variants
175 for m in v.type.local_members:
176 items += member_func(m, desc='', suffix=when)
178 items += '@item The members of @code{%s}%s\n' % (
179 v.type.doc_type(), when)
182 return '\n@b{%s:}\n@table @asis\n%s@end table\n' % (what, items)
185 def texi_arguments(doc, boxed_arg_type):
188 return ('\n@b{Arguments:} the members of @code{%s}\n'
189 % boxed_arg_type.name)
190 return texi_members(doc, 'Arguments')
193 def texi_features(doc):
194 """Format the table of features"""
196 for section in doc.features.values():
197 desc = texi_format(section.text)
198 items += '@item @code{%s}\n%s' % (section.name, desc)
201 return '\n@b{Features:}\n@table @asis\n%s@end table\n' % (items)
204 def texi_sections(doc, ifcond):
205 """Format additional sections following arguments"""
207 for section in doc.sections:
209 # prefer @b over @strong, so txt doesn't translate it to *Foo:*
210 body += '\n@b{%s:}\n' % section.name
211 if section.name and section.name.startswith('Example'):
212 body += texi_example(section.text)
214 body += texi_format(section.text)
215 body += texi_if(ifcond, suffix='')
219 def texi_type(typ, doc, ifcond, members):
220 return TYPE_FMT(type=typ,
224 features=texi_features(doc),
225 sections=texi_sections(doc, ifcond))
228 def texi_msg(typ, doc, ifcond, members):
229 return MSG_FMT(type=typ,
233 features=texi_features(doc),
234 sections=texi_sections(doc, ifcond))
237 class QAPISchemaGenDocVisitor(QAPISchemaVisitor):
238 def __init__(self, prefix):
239 self._prefix = prefix
240 self._gen = QAPIGenDoc(self._prefix + 'qapi-doc.texi')
243 def write(self, output_dir):
244 self._gen.write(output_dir)
246 def visit_enum_type(self, name, info, ifcond, features, members, prefix):
248 self._gen.add(texi_type('Enum', doc, ifcond,
249 texi_members(doc, 'Values',
250 member_func=texi_enum_value)))
252 def visit_object_type(self, name, info, ifcond, features,
253 base, members, variants):
255 if base and base.is_implicit():
257 self._gen.add(texi_type('Object', doc, ifcond,
258 texi_members(doc, 'Members', base, variants)))
260 def visit_alternate_type(self, name, info, ifcond, features, variants):
262 self._gen.add(texi_type('Alternate', doc, ifcond,
263 texi_members(doc, 'Members')))
265 def visit_command(self, name, info, ifcond, features,
266 arg_type, ret_type, gen, success_response, boxed,
267 allow_oob, allow_preconfig):
269 self._gen.add(texi_msg('Command', doc, ifcond,
271 arg_type if boxed else None)))
273 def visit_event(self, name, info, ifcond, features, arg_type, boxed):
275 self._gen.add(texi_msg('Event', doc, ifcond,
277 arg_type if boxed else None)))
279 def symbol(self, doc, entity):
286 def freeform(self, doc):
290 self._gen.add(texi_body(doc) + texi_sections(doc, None))
293 def gen_doc(schema, output_dir, prefix):
294 vis = QAPISchemaGenDocVisitor(prefix)
295 vis.visit_begin(schema)
296 for doc in schema.docs:
298 vis.symbol(doc, schema.lookup_entity(doc.symbol))
301 vis.write(output_dir)