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Prepare to split clippy_lints #14684

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1 change: 1 addition & 0 deletions Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@ path = "src/driver.rs"
clippy_config = { path = "clippy_config" }
clippy_lints = { path = "clippy_lints" }
clippy_utils = { path = "clippy_utils" }
declare_clippy_lint = { path = "declare_clippy_lint" }
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@samueltardieu samueltardieu May 30, 2025 •
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This crate must also be added to tests/dogfood.rs, and the subsequent warnings fixed.

rustc_tools_util = { path = "rustc_tools_util", version = "0.4.2" }
clippy_lints_internal = { path = "clippy_lints_internal", optional = true }
tempfile = { version = "3.20", optional = true }
Expand Down
1 change: 1 addition & 0 deletions clippy_dev/src/release.rs
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Expand Up @@ -5,6 +5,7 @@ static CARGO_TOML_FILES: &[&str] = &[
"clippy_config/Cargo.toml",
"clippy_lints/Cargo.toml",
"clippy_utils/Cargo.toml",
"declare_clippy_lint/Cargo.toml",
"Cargo.toml",
];

Expand Down
282 changes: 168 additions & 114 deletions clippy_dev/src/update_lints.rs
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Expand Up @@ -4,8 +4,9 @@ use crate::utils::{
use itertools::Itertools;
use std::collections::HashSet;
use std::fmt::Write;
use std::fs;
use std::ops::Range;
use std::path::{Path, PathBuf};
use std::path::{self, Path, PathBuf};
use walkdir::{DirEntry, WalkDir};

const GENERATED_FILE_COMMENT: &str = "// This file was generated by `cargo dev update_lints`.\n\
Expand Down Expand Up @@ -36,123 +37,164 @@ pub fn generate_lint_files(
deprecated: &[DeprecatedLint],
renamed: &[RenamedLint],
) {
FileUpdater::default().update_files_checked(
let mut updater = FileUpdater::default();
updater.update_file_checked(
"cargo dev update_lints",
update_mode,
&mut [
(
"README.md",
&mut update_text_region_fn("[There are over ", " lints included in this crate!]", |dst| {
write!(dst, "{}", round_to_fifty(lints.len())).unwrap();
}),
),
(
"book/src/README.md",
&mut update_text_region_fn("[There are over ", " lints included in this crate!]", |dst| {
write!(dst, "{}", round_to_fifty(lints.len())).unwrap();
}),
),
(
"CHANGELOG.md",
&mut update_text_region_fn(
"<!-- begin autogenerated links to lint list -->\n",
"<!-- end autogenerated links to lint list -->",
|dst| {
for lint in lints
.iter()
.map(|l| &*l.name)
.chain(deprecated.iter().filter_map(|l| l.name.strip_prefix("clippy::")))
.chain(renamed.iter().filter_map(|l| l.old_name.strip_prefix("clippy::")))
.sorted()
{
writeln!(dst, "[`{lint}`]: {DOCS_LINK}#{lint}").unwrap();
}
},
),
),
(
"clippy_lints/src/lib.rs",
&mut update_text_region_fn(
"// begin lints modules, do not remove this comment, it’s used in `update_lints`\n",
"// end lints modules, do not remove this comment, it’s used in `update_lints`",
|dst| {
for lint_mod in lints.iter().map(|l| &l.module).sorted().dedup() {
writeln!(dst, "mod {lint_mod};").unwrap();
}
},
),
),
("clippy_lints/src/declared_lints.rs", &mut |_, src, dst| {
dst.push_str(GENERATED_FILE_COMMENT);
dst.push_str("pub static LINTS: &[&crate::LintInfo] = &[\n");
for (module_name, lint_name) in lints.iter().map(|l| (&l.module, l.name.to_uppercase())).sorted() {
writeln!(dst, " crate::{module_name}::{lint_name}_INFO,").unwrap();
}
dst.push_str("];\n");
UpdateStatus::from_changed(src != dst)
}),
("clippy_lints/src/deprecated_lints.rs", &mut |_, src, dst| {
let mut searcher = RustSearcher::new(src);
assert!(
searcher.find_token(Token::Ident("declare_with_version"))
&& searcher.find_token(Token::Ident("declare_with_version")),
"error reading deprecated lints"
);
dst.push_str(&src[..searcher.pos() as usize]);
dst.push_str("! { DEPRECATED(DEPRECATED_VERSION) = [\n");
for lint in deprecated {
write!(
dst,
" #[clippy::version = \"{}\"]\n (\"{}\", \"{}\"),\n",
lint.version, lint.name, lint.reason,
)
.unwrap();
"README.md",
&mut update_text_region_fn("[There are over ", " lints included in this crate!]", |dst| {
write!(dst, "{}", round_to_fifty(lints.len())).unwrap();
}),
);
updater.update_file_checked(
"cargo dev update_lints",
update_mode,
"book/src/README.md",
&mut update_text_region_fn("[There are over ", " lints included in this crate!]", |dst| {
write!(dst, "{}", round_to_fifty(lints.len())).unwrap();
}),
);
updater.update_file_checked(
"cargo dev update_lints",
update_mode,
"CHANGELOG.md",
&mut update_text_region_fn(
"<!-- begin autogenerated links to lint list -->\n",
"<!-- end autogenerated links to lint list -->",
|dst| {
for lint in lints
.iter()
.map(|l| &*l.name)
.chain(deprecated.iter().filter_map(|l| l.name.strip_prefix("clippy::")))
.chain(renamed.iter().filter_map(|l| l.old_name.strip_prefix("clippy::")))
.sorted()
{
writeln!(dst, "[`{lint}`]: {DOCS_LINK}#{lint}").unwrap();
}
dst.push_str(
"]}\n\n\
},
),
);
updater.update_file_checked(
"cargo dev update_lints",
update_mode,
"clippy_lints/src/deprecated_lints.rs",
&mut |_, src, dst| {
let mut searcher = RustSearcher::new(src);
assert!(
searcher.find_token(Token::Ident("declare_with_version"))
&& searcher.find_token(Token::Ident("declare_with_version")),
"error reading deprecated lints"
);
dst.push_str(&src[..searcher.pos() as usize]);
dst.push_str("! { DEPRECATED(DEPRECATED_VERSION) = [\n");
for lint in deprecated {
write!(
dst,
" #[clippy::version = \"{}\"]\n (\"{}\", \"{}\"),\n",
lint.version, lint.name, lint.reason,
)
.unwrap();
}
dst.push_str(
"]}\n\n\
#[rustfmt::skip]\n\
declare_with_version! { RENAMED(RENAMED_VERSION) = [\n\
",
);
for lint in renamed {
write!(
dst,
" #[clippy::version = \"{}\"]\n (\"{}\", \"{}\"),\n",
lint.version, lint.old_name, lint.new_name,
)
.unwrap();
);
for lint in renamed {
write!(
dst,
" #[clippy::version = \"{}\"]\n (\"{}\", \"{}\"),\n",
lint.version, lint.old_name, lint.new_name,
)
.unwrap();
}
dst.push_str("]}\n");
UpdateStatus::from_changed(src != dst)
},
);
updater.update_file_checked(
"cargo dev update_lints",
update_mode,
"tests/ui/deprecated.rs",
&mut |_, src, dst| {
dst.push_str(GENERATED_FILE_COMMENT);
for lint in deprecated {
writeln!(dst, "#![warn({})] //~ ERROR: lint `{}`", lint.name, lint.name).unwrap();
}
dst.push_str("\nfn main() {}\n");
UpdateStatus::from_changed(src != dst)
},
);
updater.update_file_checked(
"cargo dev update_lints",
update_mode,
"tests/ui/rename.rs",
&mut move |_, src, dst| {
let mut seen_lints = HashSet::new();
dst.push_str(GENERATED_FILE_COMMENT);
dst.push_str("#![allow(clippy::duplicated_attributes)]\n");
for lint in renamed {
if seen_lints.insert(&lint.new_name) {
writeln!(dst, "#![allow({})]", lint.new_name).unwrap();
}
dst.push_str("]}\n");
UpdateStatus::from_changed(src != dst)
}),
("tests/ui/deprecated.rs", &mut |_, src, dst| {
dst.push_str(GENERATED_FILE_COMMENT);
for lint in deprecated {
writeln!(dst, "#![warn({})] //~ ERROR: lint `{}`", lint.name, lint.name).unwrap();
}
seen_lints.clear();
for lint in renamed {
if seen_lints.insert(&lint.old_name) {
writeln!(dst, "#![warn({})] //~ ERROR: lint `{}`", lint.old_name, lint.old_name).unwrap();
}
dst.push_str("\nfn main() {}\n");
UpdateStatus::from_changed(src != dst)
}),
("tests/ui/rename.rs", &mut move |_, src, dst| {
let mut seen_lints = HashSet::new();
dst.push_str(GENERATED_FILE_COMMENT);
dst.push_str("#![allow(clippy::duplicated_attributes)]\n");
for lint in renamed {
if seen_lints.insert(&lint.new_name) {
writeln!(dst, "#![allow({})]", lint.new_name).unwrap();
}
dst.push_str("\nfn main() {}\n");
UpdateStatus::from_changed(src != dst)
},
);
for (crate_name, lints) in lints.iter().into_group_map_by(|&l| {
let Some(path::Component::Normal(name)) = l.path.components().next() else {
// All paths should start with `{crate_name}/src` when parsed from `find_lint_decls`
panic!("internal error: can't read crate name from path `{}`", l.path.display());
};
name
}) {
updater.update_file_checked(
"cargo dev update_lints",
update_mode,
Path::new(crate_name).join("src/lib.rs"),
&mut update_text_region_fn(
"// begin lints modules, do not remove this comment, it’s used in `update_lints`\n",
"// end lints modules, do not remove this comment, it’s used in `update_lints`",
|dst| {
for lint_mod in lints
.iter()
.filter(|l| !l.module.is_empty())
.map(|l| l.module.split_once("::").map_or(&*l.module, |x| x.0))
.sorted()
.dedup()
{
writeln!(dst, "mod {lint_mod};").unwrap();
}
}
seen_lints.clear();
for lint in renamed {
if seen_lints.insert(&lint.old_name) {
writeln!(dst, "#![warn({})] //~ ERROR: lint `{}`", lint.old_name, lint.old_name).unwrap();
},
),
);
updater.update_file_checked(
"cargo dev update_lints",
update_mode,
Path::new(crate_name).join("src/declared_lints.rs"),
&mut |_, src, dst| {
dst.push_str(GENERATED_FILE_COMMENT);
dst.push_str("pub static LINTS: &[&::declare_clippy_lint::LintInfo] = &[\n");
for (module_path, lint_name) in lints.iter().map(|l| (&l.module, l.name.to_uppercase())).sorted() {
if module_path.is_empty() {
writeln!(dst, " crate::{lint_name}_INFO,").unwrap();
} else {
writeln!(dst, " crate::{module_path}::{lint_name}_INFO,").unwrap();
}
}
dst.push_str("\nfn main() {}\n");
dst.push_str("];\n");
UpdateStatus::from_changed(src != dst)
}),
],
);
},
);
}
}

fn round_to_fifty(count: usize) -> usize {
Expand Down Expand Up @@ -186,13 +228,25 @@ pub struct RenamedLint {
pub fn find_lint_decls() -> Vec<Lint> {
let mut lints = Vec::with_capacity(1000);
let mut contents = String::new();
for (file, module) in read_src_with_module("clippy_lints/src".as_ref()) {
parse_clippy_lint_decls(
file.path(),
File::open_read_to_cleared_string(file.path(), &mut contents),
&module,
&mut lints,
);
for e in expect_action(fs::read_dir("."), ErrAction::Read, ".") {
let e = expect_action(e, ErrAction::Read, ".");
if !expect_action(e.file_type(), ErrAction::Read, ".").is_dir() {
continue;
}
let Ok(mut name) = e.file_name().into_string() else {
continue;
};
if name.starts_with("clippy_lints") && name != "clippy_lints_internal" {
name.push_str("/src");
for (file, module) in read_src_with_module(name.as_ref()) {
parse_clippy_lint_decls(
file.path(),
File::open_read_to_cleared_string(file.path(), &mut contents),
&module,
&mut lints,
);
}
}
}
lints.sort_by(|lhs, rhs| lhs.name.cmp(&rhs.name));
lints
Expand All @@ -204,7 +258,7 @@ fn read_src_with_module(src_root: &Path) -> impl use<'_> + Iterator<Item = (DirE
let e = expect_action(e, ErrAction::Read, src_root);
let path = e.path().as_os_str().as_encoded_bytes();
if let Some(path) = path.strip_suffix(b".rs")
&& let Some(path) = path.get("clippy_lints/src/".len()..)
&& let Some(path) = path.get(src_root.as_os_str().len() + 1..)
{
if path == b"lib" {
Some((e, String::new()))
Expand Down
15 changes: 0 additions & 15 deletions clippy_dev/src/utils.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -383,21 +383,6 @@ impl FileUpdater {
self.update_file_checked_inner(tool, mode, path.as_ref(), update);
}

#[expect(clippy::type_complexity)]
pub fn update_files_checked(
&mut self,
tool: &str,
mode: UpdateMode,
files: &mut [(
impl AsRef<Path>,
&mut dyn FnMut(&Path, &str, &mut String) -> UpdateStatus,
)],
) {
for (path, update) in files {
self.update_file_checked_inner(tool, mode, path.as_ref(), update);
}
}

pub fn update_file(
&mut self,
path: impl AsRef<Path>,
Expand Down
1 change: 1 addition & 0 deletions clippy_lints/Cargo.toml
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Expand Up @@ -13,6 +13,7 @@ arrayvec = { version = "0.7", default-features = false }
cargo_metadata = "0.18"
clippy_config = { path = "../clippy_config" }
clippy_utils = { path = "../clippy_utils" }
declare_clippy_lint = { path = "../declare_clippy_lint" }
itertools = "0.12"
quine-mc_cluskey = "0.2"
regex-syntax = "0.8"
Expand Down
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