4 # This work is licensed under the terms of the GNU LGPL, version 2+.
5 # See the COPYING file in the top-level directory.
6 """This script produces the documentation of a qapi schema in texinfo format"""
8 from __future__ import print_function
13 @deftypefn {type} {{}} {name}
21 @deftp {{{type}}} {name}
28 EXAMPLE_FMT = """@example
34 def subst_strong(doc):
35 """Replaces *foo* by @strong{foo}"""
36 return re.sub(r'\*([^*\n]+)\*', r'@strong{\1}', doc)
40 """Replaces _foo_ by @emph{foo}"""
41 return re.sub(r'\b_([^_\n]+)_\b', r'@emph{\1}', doc)
45 """Replaces @var by @code{var}"""
46 return re.sub(r'@([\w-]+)', r'@code{\1}', doc)
49 def subst_braces(doc):
50 """Replaces {} with @{ @}"""
51 return doc.replace('{', '@{').replace('}', '@}')
54 def texi_example(doc):
56 # TODO: Neglects to escape @ characters.
57 # We should probably escape them in subst_braces(), and rename the
58 # function to subst_special() or subs_texi_special(). If we do that, we
59 # need to delay it until after subst_vars() in texi_format().
60 doc = subst_braces(doc).strip('\n')
61 return EXAMPLE_FMT(code=doc)
69 - |: generates an @example
70 - =: generates @section
71 - ==: generates @subsection
72 - 1. or 1): generates an @enumerate @item
73 - */-: generates an @itemize list
76 doc = subst_braces(doc)
79 doc = subst_strong(doc)
82 for line in doc.split('\n'):
85 # FIXME: Doing this in a single if / elif chain is
86 # problematic. For instance, a line without markup terminates
87 # a list if it follows a blank line (reaches the final elif),
88 # but a line with some *other* markup, such as a = title
91 # Make sure to update section "Documentation markup" in
92 # docs/devel/qapi-code-gen.txt when fixing this.
93 if line.startswith('| '):
94 line = EXAMPLE_FMT(code=line[2:])
95 elif line.startswith('= '):
96 line = '@section ' + line[2:]
97 elif line.startswith('== '):
98 line = '@subsection ' + line[3:]
99 elif re.match(r'^([0-9]*\.) ', line):
101 ret += '@enumerate\n'
104 line = line[line.find(' ')+1:]
105 elif re.match(r'^[*-] ', line):
107 ret += '@itemize %s\n' % {'*': '@bullet',
108 '-': '@minus'}[line[0]]
112 elif lastempty and inlist:
113 ret += '@end %s\n\n' % inlist
120 ret += '@end %s\n\n' % inlist
125 """Format the main documentation body"""
126 return texi_format(doc.body.text)
129 def texi_if(ifcond, prefix='\n', suffix='\n'):
130 """Format the #if condition"""
133 return '%s@b{If:} @code{%s}%s' % (prefix, ', '.join(ifcond), suffix)
136 def texi_enum_value(value, desc, suffix):
137 """Format a table of members item for an enumeration value"""
138 return '@item @code{%s}\n%s%s' % (
139 value.name, desc, texi_if(value.ifcond, prefix='@*'))
142 def texi_member(member, desc, suffix):
143 """Format a table of members item for an object type member"""
144 typ = member.type.doc_type()
145 membertype = ': ' + typ if typ else ''
146 return '@item @code{%s%s}%s%s\n%s%s' % (
147 member.name, membertype,
148 ' (optional)' if member.optional else '',
149 suffix, desc, texi_if(member.ifcond, prefix='@*'))
152 def texi_members(doc, what, base, variants, member_func):
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_features(doc):
186 """Format the table of features"""
188 for section in doc.features.values():
189 desc = texi_format(section.text)
190 items += '@item @code{%s}\n%s' % (section.name, desc)
193 return '\n@b{Features:}\n@table @asis\n%s@end table\n' % (items)
196 def texi_sections(doc, ifcond):
197 """Format additional sections following arguments"""
199 for section in doc.sections:
201 # prefer @b over @strong, so txt doesn't translate it to *Foo:*
202 body += '\n@b{%s:}\n' % section.name
203 if section.name and section.name.startswith('Example'):
204 body += texi_example(section.text)
206 body += texi_format(section.text)
207 body += texi_if(ifcond, suffix='')
211 def texi_entity(doc, what, ifcond, base=None, variants=None,
212 member_func=texi_member):
213 return (texi_body(doc)
214 + texi_members(doc, what, base, variants, member_func)
216 + texi_sections(doc, ifcond))
219 class QAPISchemaGenDocVisitor(qapi.common.QAPISchemaVisitor):
220 def __init__(self, prefix):
221 self._prefix = prefix
222 self._gen = qapi.common.QAPIGenDoc(self._prefix + 'qapi-doc.texi')
225 def write(self, output_dir):
226 self._gen.write(output_dir)
228 def visit_enum_type(self, name, info, ifcond, members, prefix):
230 self._gen.add(TYPE_FMT(type='Enum',
232 body=texi_entity(doc, 'Values', ifcond,
233 member_func=texi_enum_value)))
235 def visit_object_type(self, name, info, ifcond, base, members, variants,
238 if base and base.is_implicit():
240 self._gen.add(TYPE_FMT(type='Object',
242 body=texi_entity(doc, 'Members', ifcond,
245 def visit_alternate_type(self, name, info, ifcond, variants):
247 self._gen.add(TYPE_FMT(type='Alternate',
249 body=texi_entity(doc, 'Members', ifcond)))
251 def visit_command(self, name, info, ifcond, arg_type, ret_type, gen,
252 success_response, boxed, allow_oob, allow_preconfig):
255 body = texi_body(doc)
256 body += ('\n@b{Arguments:} the members of @code{%s}\n'
258 body += texi_sections(doc, ifcond)
260 body = texi_entity(doc, 'Arguments', ifcond)
261 self._gen.add(MSG_FMT(type='Command',
265 def visit_event(self, name, info, ifcond, arg_type, boxed):
267 self._gen.add(MSG_FMT(type='Event',
269 body=texi_entity(doc, 'Arguments', ifcond)))
271 def symbol(self, doc, entity):
278 def freeform(self, doc):
282 self._gen.add(texi_body(doc) + texi_sections(doc, None))
285 def gen_doc(schema, output_dir, prefix):
286 if not qapi.common.doc_required:
288 vis = QAPISchemaGenDocVisitor(prefix)
289 vis.visit_begin(schema)
290 for doc in schema.docs:
292 vis.symbol(doc, schema.lookup_entity(doc.symbol))
295 vis.write(output_dir)