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Fri, 15 Nov 2024 08:40:46 -0800 (PST) X-Google-Smtp-Source: AGHT+IHWJyVNk4KS0t+9VWpoN0zr6vN/lTUh+y464BFJtsL/8dWi4V2mO1PcZFai8U/PcM0V3yvhYA== X-Received: by 2002:a5d:59a2:0:b0:37d:47ef:17d0 with SMTP id ffacd0b85a97d-38224f861c6mr3489482f8f.13.1731688846161; Fri, 15 Nov 2024 08:40:46 -0800 (PST) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: qemu-rust@nongnu.org, berrange@redhat.com, junjie.mao@hotmail.com, manos.pitsidianakis@linaro.org, kwolf@redhat.com Subject: [PATCH 05/12] rust: build: generate lint flags from Cargo.toml Date: Fri, 15 Nov 2024 17:40:18 +0100 Message-ID: <20241115164025.1917618-5-pbonzini@redhat.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241115163944.1917393-1-pbonzini@redhat.com> References: <20241115163944.1917393-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.12, 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_H2=-0.658, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1731688965608116600 Content-Type: text/plain; charset="utf-8" Cargo.toml makes it possible to describe the desired lint level settings in a nice format. We can extend this to Meson-built crates, by teaching rustc_args.py to fetch lint and --check-cfg arguments from Cargo.toml. --check-cfg arguments come from the unexpected_cfgs lint as well as crate features Start with qemu-api, since it already has a [lints.rust] table and an invocation of rustc_args.py. Signed-off-by: Paolo Bonzini --- meson.build | 3 +- rust/qemu-api/meson.build | 4 +- scripts/rust/rustc_args.py | 83 +++++++++++++++++++++++++++++++++++++- 3 files changed, 86 insertions(+), 4 deletions(-) diff --git a/meson.build b/meson.build index b51add16d2f..231fccf3928 100644 --- a/meson.build +++ b/meson.build @@ -120,7 +120,8 @@ if have_rust endif =20 if have_rust - rustc_args =3D find_program('scripts/rust/rustc_args.py') + rustc_args =3D [find_program('scripts/rust/rustc_args.py'), + '--rustc-version', rustc.version()] rustfmt =3D find_program('rustfmt', required: false) =20 # Prohibit code that is forbidden in Rust 2024 diff --git a/rust/qemu-api/meson.build b/rust/qemu-api/meson.build index 2ff6d2ce3d0..1ed79672cc9 100644 --- a/rust/qemu-api/meson.build +++ b/rust/qemu-api/meson.build @@ -1,6 +1,6 @@ _qemu_api_cfg =3D run_command(rustc_args, - '--config-headers', config_host_h, files('Cargo.toml'), - capture: true, check: true).stdout().strip().split() + '--config-headers', config_host_h, '--features', '--lints', files('Cargo= .toml'), + capture: true, check: true).stdout().strip().splitlines() =20 # _qemu_api_cfg +=3D ['--cfg', 'feature=3D"allocator"'] if rustc.version().version_compare('>=3D1.77.0') diff --git a/scripts/rust/rustc_args.py b/scripts/rust/rustc_args.py index 942dd2b2bab..9b9778a1cac 100644 --- a/scripts/rust/rustc_args.py +++ b/scripts/rust/rustc_args.py @@ -25,9 +25,10 @@ """ =20 import argparse +from dataclasses import dataclass import logging from pathlib import Path -from typing import Any, Iterable, Mapping, Optional, Set +from typing import Any, Iterable, List, Mapping, Optional, Set =20 try: import tomllib @@ -61,6 +62,45 @@ def get_table(self, key: str) -> Mapping[Any, Any]: return table =20 =20 +@dataclass +class LintFlag: + flags: List[str] + priority: int + + +def generate_lint_flags(cargo_toml: CargoTOML) -> Iterable[str]: + """Converts Cargo.toml lints to rustc -A/-D/-F/-W flags.""" + + toml_lints =3D cargo_toml.lints + + lint_list =3D [] + for k, v in toml_lints.items(): + prefix =3D "" if k =3D=3D "rust" else k + "::" + for lint, data in v.items(): + level =3D data if isinstance(data, str) else data["level"] + priority =3D 0 if isinstance(data, str) else data.get("priorit= y", 0) + if level =3D=3D "deny": + flag =3D "-D" + elif level =3D=3D "allow": + flag =3D "-A" + elif level =3D=3D "warn": + flag =3D "-W" + elif level =3D=3D "forbid": + flag =3D "-F" + else: + raise Exception(f"invalid level {level} for {prefix}{lint}= ") + + # This may change if QEMU ever invokes clippy-driver or rustdo= c by + # hand. For now, check the syntax but do not add non-rustc li= nts to + # the command line. + if k =3D=3D "rust": + lint_list.append(LintFlag(flags=3D[flag, prefix + lint], p= riority=3Dpriority)) + + lint_list.sort(key=3Dlambda x: x.priority) + for lint in lint_list: + yield from lint.flags + + def generate_cfg_flags(header: str, cargo_toml: CargoTOML) -> Iterable[str= ]: """Converts defines from config[..].h headers to rustc --cfg flags.""" =20 @@ -97,13 +137,54 @@ def main() -> None: dest=3D"cargo_toml", help=3D"path to Cargo.toml file", ) + parser.add_argument( + "--features", + action=3D"store_true", + dest=3D"features", + help=3D"generate --check-cfg arguments for features", + required=3DFalse, + default=3DNone, + ) + parser.add_argument( + "--lints", + action=3D"store_true", + dest=3D"lints", + help=3D"generate arguments from [lints] table", + required=3DFalse, + default=3DNone, + ) + parser.add_argument( + "--rustc-version", + metavar=3D"VERSION", + dest=3D"rustc_version", + action=3D"store", + help=3D"version of rustc", + required=3DFalse, + default=3D"1.0.0", + ) args =3D parser.parse_args() if args.verbose: logging.basicConfig(level=3Dlogging.DEBUG) logging.debug("args: %s", args) =20 + rustc_version =3D tuple((int(x) for x in args.rustc_version.split('.')= [0:2])) cargo_toml =3D CargoTOML(args.cargo_toml) =20 + if args.lints: + for tok in generate_lint_flags(cargo_toml): + print(tok) + + if rustc_version >=3D (1, 80): + if args.lints: + for cfg in sorted(cargo_toml.check_cfg): + print("--check-cfg") + print(cfg) + if args.features: + for feature in cargo_toml.get_table("features"): + if feature !=3D "default": + print("--check-cfg") + print(f'cfg(feature,values("{feature}"))') + for header in args.config_headers: for tok in generate_cfg_flags(header, cargo_toml): print(tok) --=20 2.47.0