From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 273B4C4727E for ; Fri, 25 Sep 2020 16:33:47 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7624D221EC for ; Fri, 25 Sep 2020 16:33:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="Xig6Zi/o" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7624D221EC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:38948 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kLqfJ-0002Hb-EY for qemu-devel@archiver.kernel.org; Fri, 25 Sep 2020 12:33:45 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47896) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kLqVP-0006fm-Bq for qemu-devel@nongnu.org; Fri, 25 Sep 2020 12:23:31 -0400 Received: from mail-wm1-x32f.google.com ([2a00:1450:4864:20::32f]:36227) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kLqVK-0006ng-56 for qemu-devel@nongnu.org; Fri, 25 Sep 2020 12:23:31 -0400 Received: by mail-wm1-x32f.google.com with SMTP id e2so3947418wme.1 for ; Fri, 25 Sep 2020 09:23:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=5QK61Iu51GnV8ssf6Wi/MgxNc0CZq3E5l2KB7srun8Y=; b=Xig6Zi/osi3xvMQQjBVOJASsu8Au2CYCGwRw2at+fLRXuA1I1ScdGES86h1PtIirfg Uicaae3CHoxcetyqlNXUOLoeMWdv9bXUZx6sVnCMy8p7OxQrT7j4QXLL/6JSJcdxVySq DWz9ENEDkjxvSc5BROGoB79P7CbfXfsTgBkdlsqSc5F++WbVgGLr1pl/zd16yMJvZwVm 5GAcmPxeYarmGb8RL77layYNW0Lx0Kga8LUR5C0UO4CwC12WysonUOynfraogrC1E/hd A1TI4Q7s7IumxCrQLGRYKzB8Bj3Uzho6O8hpaqepdMBSnoRwdTF0fwUg0fI05WykgN8j HXPQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=5QK61Iu51GnV8ssf6Wi/MgxNc0CZq3E5l2KB7srun8Y=; b=Cz7Q4e24Vc3FebgIdd55wB2+fr2nfBFMUd19HCEoUOnk6rZFBfg/FeuKomFFeWXfph Ei6O3mqXxDZAYuXZ7PYMt3UTeA920alOpCW7VsTNHqKjNWWjgGhx2noW9020BmIol1lx yRZOyQS4SkChKuklieDStlw4/NP7u2+1scA83rSPpNfwsuioDOtKZaMnIk5AZKJQU7PE xie5dGji3YgBdKk2MCNuhabW3gj1IyqFUDwxMICdBpo/um3Swy28oxojjdZdFOWeMnkM Ocktut+dhJs/em/vchyAjL9uy/uDW4/Qs4p9z/hM1njSUQVI7UaBOF2wr5peSkxgBbtJ HhSw== X-Gm-Message-State: AOAM530IPic3VExq0/CO9IwpKwl4sI5kHTXYBnRilAWPZjuw8zP9cuUF xEDX9GOD42duQT40q4vxUCyFxtejJ4y7+32U X-Google-Smtp-Source: ABdhPJwzi7k5Xe1+M7y5Z+vrD5sccG0rJY/YKaSOM9RH5tVygubJPS9DC62ltFDmhJ+QndM4GN62gA== X-Received: by 2002:a05:600c:2283:: with SMTP id 3mr3826443wmf.37.1601051004050; Fri, 25 Sep 2020 09:23:24 -0700 (PDT) Received: from orth.archaic.org.uk (orth.archaic.org.uk. [81.2.115.148]) by smtp.gmail.com with ESMTPSA id d6sm3565824wrq.67.2020.09.25.09.23.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 25 Sep 2020 09:23:23 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PATCH v6 05/21] scripts/qapi/parser.py: improve doc comment indent handling Date: Fri, 25 Sep 2020 17:23:00 +0100 Message-Id: <20200925162316.21205-6-peter.maydell@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200925162316.21205-1-peter.maydell@linaro.org> References: <20200925162316.21205-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::32f; envelope-from=peter.maydell@linaro.org; helo=mail-wm1-x32f.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: John Snow , Markus Armbruster Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Make the handling of indentation in doc comments more sophisticated, so that when we see a section like: Notes: some text some more text indented line 3 we save it for the doc-comment processing code as: some text some more text indented line 3 and when we see a section with the heading on its own line: Notes: some text some more text indented text we also accept that and save it in the same form. If we detect that the comment document text is not indented as much as we expect it to be, we throw a parse error. (We don't complain about over-indented sections, because for rST this can be legitimate markup.) The golden reference for the doc comment text is updated to remove the two 'wrong' indents; these now form a test case that we correctly stripped leading whitespace from an indented multi-line argument definition. We update the documentation in docs/devel/qapi-code-gen.txt to describe the new indentation rules. Signed-off-by: Peter Maydell --- docs/devel/qapi-code-gen.txt | 23 +++++++ scripts/qapi/parser.py | 93 +++++++++++++++++++++------ tests/qapi-schema/doc-bad-indent.err | 1 + tests/qapi-schema/doc-bad-indent.json | 8 +++ tests/qapi-schema/doc-bad-indent.out | 0 tests/qapi-schema/doc-good.out | 4 +- tests/qapi-schema/meson.build | 1 + 7 files changed, 109 insertions(+), 21 deletions(-) create mode 100644 tests/qapi-schema/doc-bad-indent.err create mode 100644 tests/qapi-schema/doc-bad-indent.json create mode 100644 tests/qapi-schema/doc-bad-indent.out diff --git a/docs/devel/qapi-code-gen.txt b/docs/devel/qapi-code-gen.txt index 9eede44350c..69eaffac376 100644 --- a/docs/devel/qapi-code-gen.txt +++ b/docs/devel/qapi-code-gen.txt @@ -901,6 +901,22 @@ commands and events), member (for structs and unions), branch (for alternates), or value (for enums), and finally optional tagged sections. +Descriptions of arguments can span multiple lines. The description +text can start on the line following the '@argname:', in which case +it must not be indented at all. It can also start on the same line +as the '@argname:'. In this case if it spans multiple lines then +second and subsequent lines must be indented to line up with the +first character of the first line of the description: + +# @argone: +# This is a two line description +# in the first style. +# +# @argtwo: This is a two line description +# in the second style. + +The number of spaces between the ':' and the text is not significant. + FIXME: the parser accepts these things in almost any order. FIXME: union branches should be described, too. @@ -911,6 +927,13 @@ A tagged section starts with one of the following words: "Note:"/"Notes:", "Since:", "Example"/"Examples", "Returns:", "TODO:". The section ends with the start of a new section. +The text of a section can start on a new line, in +which case it must not be indented at all. It can also start +on the same line as the 'Note:', 'Returns:', etc tag. In this +case if it spans multiple lines then second and subsequent +lines must be indented to match the first, in the same way as +multiline argument descriptions. + A 'Since: x.y.z' tagged section lists the release that introduced the definition. diff --git a/scripts/qapi/parser.py b/scripts/qapi/parser.py index 04bf10db378..6c3455b41f3 100644 --- a/scripts/qapi/parser.py +++ b/scripts/qapi/parser.py @@ -319,17 +319,32 @@ class QAPIDoc: """ class Section: - def __init__(self, name=None): + def __init__(self, parser, name=None, indent=0): + # parser, for error messages about indentation + self._parser = parser # optional section name (argument/member or section name) self.name = name self.text = '' + # the expected indent level of the text of this section + self._indent = indent def append(self, line): + # Strip leading spaces corresponding to the expected indent level + # Blank lines are always OK. + if line: + indent = re.match(r'\s*', line).end() + if indent < self._indent: + raise QAPIParseError( + self._parser, + "unexpected de-indent (expected at least %d spaces)" % + self._indent) + line = line[self._indent:] + self.text += line.rstrip() + '\n' class ArgSection(Section): - def __init__(self, name): - super().__init__(name) + def __init__(self, parser, name, indent=0): + super().__init__(parser, name, indent) self.member = None def connect(self, member): @@ -343,7 +358,7 @@ class QAPIDoc: self._parser = parser self.info = info self.symbol = None - self.body = QAPIDoc.Section() + self.body = QAPIDoc.Section(parser) # dict mapping parameter name to ArgSection self.args = OrderedDict() self.features = OrderedDict() @@ -447,8 +462,21 @@ class QAPIDoc: name = line.split(' ', 1)[0] if name.startswith('@') and name.endswith(':'): - line = line[len(name)+1:] - self._start_args_section(name[1:-1]) + # If line is "@arg: first line of description", find the + # index of 'f', which is the indent we expect for any + # following lines. We then remove the leading "@arg:" from line + # and replace it with spaces so that 'f' has the same index + # as it did in the original line and can be handled the same + # way we will handle following lines. + indent = re.match(r'@\S*:\s*', line).end() + line = line[indent:] + if not line: + # Line was just the "@arg:" header; following lines + # are not indented + indent = 0 + else: + line = ' ' * indent + line + self._start_args_section(name[1:-1], indent) elif self._is_section_tag(name): self._append_line = self._append_various_line self._append_various_line(line) @@ -469,8 +497,21 @@ class QAPIDoc: name = line.split(' ', 1)[0] if name.startswith('@') and name.endswith(':'): - line = line[len(name)+1:] - self._start_features_section(name[1:-1]) + # If line is "@arg: first line of description", find the + # index of 'f', which is the indent we expect for any + # following lines. We then remove the leading "@arg:" from line + # and replace it with spaces so that 'f' has the same index + # as it did in the original line and can be handled the same + # way we will handle following lines. + indent = re.match(r'@\S*:\s*', line).end() + line = line[indent:] + if not line: + # Line was just the "@arg:" header; following lines + # are not indented + indent = 0 + else: + line = ' ' * indent + line + self._start_features_section(name[1:-1], indent) elif self._is_section_tag(name): self._append_line = self._append_various_line self._append_various_line(line) @@ -502,12 +543,25 @@ class QAPIDoc: "'%s' can't follow '%s' section" % (name, self.sections[0].name)) if self._is_section_tag(name): - line = line[len(name)+1:] - self._start_section(name[:-1]) + # If line is "Section: first line of description", find the + # index of 'f', which is the indent we expect for any + # following lines. We then remove the leading "Section:" from line + # and replace it with spaces so that 'f' has the same index + # as it did in the original line and can be handled the same + # way we will handle following lines. + indent = re.match(r'\S*:\s*', line).end() + line = line[indent:] + if not line: + # Line was just the "Section:" header; following lines + # are not indented + indent = 0 + else: + line = ' ' * indent + line + self._start_section(name[:-1], indent) self._append_freeform(line) - def _start_symbol_section(self, symbols_dict, name): + def _start_symbol_section(self, symbols_dict, name, indent): # FIXME invalid names other than the empty string aren't flagged if not name: raise QAPIParseError(self._parser, "invalid parameter name") @@ -516,21 +570,21 @@ class QAPIDoc: "'%s' parameter name duplicated" % name) assert not self.sections self._end_section() - self._section = QAPIDoc.ArgSection(name) + self._section = QAPIDoc.ArgSection(self._parser, name, indent) symbols_dict[name] = self._section - def _start_args_section(self, name): - self._start_symbol_section(self.args, name) + def _start_args_section(self, name, indent): + self._start_symbol_section(self.args, name, indent) - def _start_features_section(self, name): - self._start_symbol_section(self.features, name) + def _start_features_section(self, name, indent): + self._start_symbol_section(self.features, name, indent) - def _start_section(self, name=None): + def _start_section(self, name=None, indent=0): if name in ('Returns', 'Since') and self.has_section(name): raise QAPIParseError(self._parser, "duplicated '%s' section" % name) self._end_section() - self._section = QAPIDoc.Section(name) + self._section = QAPIDoc.Section(self._parser, name, indent) self.sections.append(self._section) def _end_section(self): @@ -553,7 +607,8 @@ class QAPIDoc: def connect_member(self, member): if member.name not in self.args: # Undocumented TODO outlaw - self.args[member.name] = QAPIDoc.ArgSection(member.name) + self.args[member.name] = QAPIDoc.ArgSection(self._parser, + member.name) self.args[member.name].connect(member) def connect_feature(self, feature): diff --git a/tests/qapi-schema/doc-bad-indent.err b/tests/qapi-schema/doc-bad-indent.err new file mode 100644 index 00000000000..67844539bd2 --- /dev/null +++ b/tests/qapi-schema/doc-bad-indent.err @@ -0,0 +1 @@ +doc-bad-indent.json:6:1: unexpected de-indent (expected at least 4 spaces) diff --git a/tests/qapi-schema/doc-bad-indent.json b/tests/qapi-schema/doc-bad-indent.json new file mode 100644 index 00000000000..edde8f21dc7 --- /dev/null +++ b/tests/qapi-schema/doc-bad-indent.json @@ -0,0 +1,8 @@ +# Multiline doc comments should have consistent indentation + +## +# @foo: +# @a: line one +# line two is wrongly indented +## +{ 'command': 'foo', 'data': { 'a': 'int' } } diff --git a/tests/qapi-schema/doc-bad-indent.out b/tests/qapi-schema/doc-bad-indent.out new file mode 100644 index 00000000000..e69de29bb2d diff --git a/tests/qapi-schema/doc-good.out b/tests/qapi-schema/doc-good.out index 9993ffcd89d..b7e3f4313da 100644 --- a/tests/qapi-schema/doc-good.out +++ b/tests/qapi-schema/doc-good.out @@ -159,7 +159,7 @@ doc symbol=Alternate arg=i an integer - @b is undocumented +@b is undocumented arg=b feature=alt-feat @@ -174,7 +174,7 @@ doc symbol=cmd the first argument arg=arg2 the second - argument +argument arg=arg3 feature=cmd-feat1 diff --git a/tests/qapi-schema/meson.build b/tests/qapi-schema/meson.build index f1449298b07..83a0a68389b 100644 --- a/tests/qapi-schema/meson.build +++ b/tests/qapi-schema/meson.build @@ -53,6 +53,7 @@ schemas = [ 'doc-bad-enum-member.json', 'doc-bad-event-arg.json', 'doc-bad-feature.json', + 'doc-bad-indent.json', 'doc-bad-section.json', 'doc-bad-symbol.json', 'doc-bad-union-member.json', -- 2.20.1