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"""
13 @deftypefn {type} {{}} {name}
22 @deftp {{{type}}} {name}
30 EXAMPLE_FMT = """@example
36 def subst_strong(doc):
37 """Replaces *foo* by @strong{foo}"""
38 return re.sub(r'\*([^*\n]+)\*', r'@strong{\1}', doc)
42 """Replaces _foo_ by @emph{foo}"""
43 return re.sub(r'\b_([^_\n]+)_\b', r'@emph{\1}', doc)
47 """Replaces @var by @code{var}"""
48 return re.sub(r'@([\w-]+)', r'@code{\1}', doc)
51 def subst_braces(doc):
52 """Replaces {} with @{ @}"""
53 return doc.replace('{', '@{').replace('}', '@}')
56 def texi_example(doc):
58 # TODO: Neglects to escape @ characters.
59 # We should probably escape them in subst_braces(), and rename the
60 # function to subst_special() or subs_texi_special(). If we do that, we
61 # need to delay it until after subst_vars() in texi_format().
62 doc = subst_braces(doc).strip('\n')
63 return EXAMPLE_FMT(code=doc)
71 - |: generates an @example
72 - =: generates @section
73 - ==: generates @subsection
74 - 1. or 1): generates an @enumerate @item
75 - */-: generates an @itemize list
78 doc = subst_braces(doc)
81 doc = subst_strong(doc)
84 for line in doc.split('\n'):
87 # FIXME: Doing this in a single if / elif chain is
88 # problematic. For instance, a line without markup terminates
89 # a list if it follows a blank line (reaches the final elif),
90 # but a line with some *other* markup, such as a = title
93 # Make sure to update section "Documentation markup" in
94 # docs/qapi-code-gen.txt when fixing this.
95 if line.startswith('| '):
96 line = EXAMPLE_FMT(code=line[2:])
97 elif line.startswith('= '):
98 line = '@section ' + line[2:]
99 elif line.startswith('== '):
100 line = '@subsection ' + line[3:]
101 elif re.match(r'^([0-9]*\.) ', line):
103 lines.append('@enumerate')
105 line = line[line.find(' ')+1:]
106 lines.append('@item')
107 elif re.match(r'^[*-] ', line):
109 lines.append('@itemize %s' % {'*': '@bullet',
110 '-': '@minus'}[line[0]])
112 lines.append('@item')
114 elif lastempty and inlist:
115 lines.append('@end %s\n' % inlist)
122 lines.append('@end %s\n' % inlist)
123 return '\n'.join(lines)
127 """Format the main documentation body"""
128 return texi_format(str(doc.body)) + '\n'
131 def texi_enum_value(value):
132 """Format a table of members item for an enumeration value"""
133 return '@item @code{%s}\n' % value.name
136 def texi_member(member, suffix=''):
137 """Format a table of members item for an object type member"""
138 typ = member.type.doc_type()
139 return '@item @code{%s%s%s}%s%s\n' % (
143 ' (optional)' if member.optional else '',
147 def texi_members(doc, what, base, variants, member_func):
148 """Format the table of members"""
150 for section in doc.args.itervalues():
151 # TODO Drop fallbacks when undocumented members are outlawed
153 desc = texi_format(str(section))
154 elif (variants and variants.tag_member == section.member
155 and not section.member.type.doc_type()):
156 values = section.member.type.member_names()
157 desc = 'One of ' + ', '.join(['@t{"%s"}' % v for v in values])
159 desc = 'Not documented'
160 items += member_func(section.member) + desc + '\n'
162 items += '@item The members of @code{%s}\n' % base.doc_type()
164 for v in variants.variants:
165 when = ' when @code{%s} is @t{"%s"}' % (
166 variants.tag_member.name, v.name)
167 if v.type.is_implicit():
168 assert not v.type.base and not v.type.variants
169 for m in v.type.local_members:
170 items += member_func(m, when)
172 items += '@item The members of @code{%s}%s\n' % (
173 v.type.doc_type(), when)
176 return '\n@b{%s:}\n@table @asis\n%s@end table\n' % (what, items)
179 def texi_sections(doc):
180 """Format additional sections following arguments"""
182 for section in doc.sections:
183 name, doc = (section.name, str(section))
185 if name.startswith('Example'):
189 # prefer @b over @strong, so txt doesn't translate it to *Foo:*
190 body += '\n\n@b{%s:}\n' % name
196 def texi_entity(doc, what, base=None, variants=None,
197 member_func=texi_member):
198 return (texi_body(doc)
199 + texi_members(doc, what, base, variants, member_func)
200 + texi_sections(doc))
203 class QAPISchemaGenDocVisitor(qapi.QAPISchemaVisitor):
208 def visit_begin(self, schema):
211 def visit_enum_type(self, name, info, values, prefix):
215 self.out += TYPE_FMT(type='Enum',
217 body=texi_entity(doc, 'Values',
218 member_func=texi_enum_value))
220 def visit_object_type(self, name, info, base, members, variants):
222 if base and base.is_implicit():
226 self.out += TYPE_FMT(type='Object',
228 body=texi_entity(doc, 'Members', base, variants))
230 def visit_alternate_type(self, name, info, variants):
234 self.out += TYPE_FMT(type='Alternate',
236 body=texi_entity(doc, 'Members'))
238 def visit_command(self, name, info, arg_type, ret_type,
239 gen, success_response, boxed):
244 body = texi_body(doc)
245 body += '\n@b{Arguments:} the members of @code{%s}' % arg_type.name
246 body += texi_sections(doc)
248 body = texi_entity(doc, 'Arguments')
249 self.out += MSG_FMT(type='Command',
253 def visit_event(self, name, info, arg_type, boxed):
257 self.out += MSG_FMT(type='Event',
259 body=texi_entity(doc, 'Arguments'))
261 def symbol(self, doc, entity):
266 def freeform(self, doc):
270 self.out += texi_body(doc) + texi_sections(doc)
273 def texi_schema(schema):
274 """Convert QAPI schema documentation to Texinfo"""
275 gen = QAPISchemaGenDocVisitor()
276 gen.visit_begin(schema)
277 for doc in schema.docs:
279 gen.symbol(doc, schema.lookup_entity(doc.symbol))
286 """Takes schema argument, prints result to stdout"""
288 print >>sys.stderr, "%s: need exactly 1 argument: SCHEMA" % argv[0]
291 schema = qapi.QAPISchema(argv[1])
292 if not qapi.doc_required:
293 print >>sys.stderr, ("%s: need pragma 'doc-required' "
294 "to generate documentation" % argv[0])
296 print texi_schema(schema)
299 if __name__ == '__main__':