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