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Wed, 10 Dec 2025 09:28:11 -0800 (PST) X-Google-Smtp-Source: AGHT+IFPxZmF/tQg9EWhcRSsJu5G7NLxSNy3ZzJzMz5UvsZwSNpc1YMwxDvZ8HoZBwyBbB1+Nop+Hw== X-Received: by 2002:a5d:54d1:0:b0:42b:300f:7d8d with SMTP id ffacd0b85a97d-42fa3afe612mr2263721f8f.34.1765387690910; Wed, 10 Dec 2025 09:28:10 -0800 (PST) Received: from [192.168.10.81] ([151.95.145.106]) by smtp.googlemail.com with ESMTPSA id ffacd0b85a97d-42fa8b85fcesm149592f8f.25.2025.12.10.09.28.10 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 10 Dec 2025 09:28:10 -0800 (PST) Message-ID: Date: Wed, 10 Dec 2025 18:28:09 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 16/19] scripts/qapi: strip trailing whitespaces To: Markus Armbruster Cc: qemu-devel@nongnu.org, marcandre.lureau@redhat.com, qemu-rust@nongnu.org References: <20251010151006.791038-1-pbonzini@redhat.com> <20251010151006.791038-17-pbonzini@redhat.com> <87jyyw59dm.fsf@pond.sub.org> Content-Language: en-US From: Paolo Bonzini Autocrypt: addr=pbonzini@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com 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, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_PASS=-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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 12/9/25 09:48, Markus Armbruster wrote: > Paolo Bonzini writes: > >> From: Marc-André Lureau >> >> This help workaround a rustfmt issue. > > Which one? Pointer suffices. > >> >> Signed-off-by: Marc-André Lureau >> Link: https://lore.kernel.org/r/20210907121943.3498701-16-marcandre.lureau@redhat.com >> Signed-off-by: Paolo Bonzini >> --- >> scripts/qapi/gen.py | 6 +++++- >> 1 file changed, 5 insertions(+), 1 deletion(-) >> >> diff --git a/scripts/qapi/gen.py b/scripts/qapi/gen.py >> index 0c9b8db3b02..c9721545ea7 100644 >> --- a/scripts/qapi/gen.py >> +++ b/scripts/qapi/gen.py >> @@ -58,7 +58,11 @@ def add(self, text: str) -> None: >> self._body += text >> >> def get_content(self) -> str: >> - return self._top() + self._preamble + self._body + self._bottom() >> + content = self._top() + self._preamble + self._body + self._bottom() >> + # delete trailing white-spaces (working around >> + # https://github.com/rust-lang/rustfmt/issues/4248) >> + content = re.sub(r'\s+$', '\n', content, 0, re.M) >> + return content >> >> def _top(self) -> str: >> # pylint: disable=no-self-use > > This doesn't just delete trailing whitespace, it also collapses multiple > blank lines into one: \s matches newlines. > > We lose the ability to generate multiple blank lines for all generators > based on QAPIGen: C (.c and .h), trace events, Rust. Hmm. > > Is collapsing blank lines necessary for working around the rustfmt > issue? > > The generators other than the Rust generator do not emit trailing > whitespace. Would that be practical for the Rust generator, too? The main source is stuff like %(cfg)s and %(serde_skip_if)s. Rust's syntax makes it more natural to write in this style, compared to C where you have "#ifdef"..."#endif", but it results in empty lines. I'll see if there's another way to clean up the output. Paolo