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Move update_lints specific code out of lib

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This commit is contained in:
Michael Wright 2021-09-18 06:43:39 +02:00
parent e6747df5cd
commit 3f804ca6d3
2 changed files with 551 additions and 554 deletions
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551
clippy_dev/src/lib.rs
View file

@ -3,14 +3,7 @@
// warn on lints, that are included in `rust-lang/rust`s bootstrap
#![warn(rust_2018_idioms, unused_lifetimes)]
use itertools::Itertools;
use regex::Regex;
use std::collections::{BTreeSet, HashMap};
use std::ffi::OsStr;
use std::fs;
use std::lazy::SyncLazy;
use std::path::{Path, PathBuf};
use walkdir::WalkDir;
use std::path::PathBuf;
pub mod bless;
pub mod fmt;
@ -19,339 +12,6 @@ pub mod serve;
pub mod setup;
pub mod update_lints;
const GENERATED_FILE_COMMENT: &str = "// This file was generated by `cargo dev update_lints`.\n\
// Use that command to update this file and do not edit by hand.\n\
// Manual edits will be overwritten.\n\n";
static DEC_CLIPPY_LINT_RE: SyncLazy<Regex> = SyncLazy::new(|| {
Regex::new(
r#"(?x)
declare_clippy_lint!\s*[\{(]
(?:\s+///.*)*
\s+pub\s+(?P<name>[A-Z_][A-Z_0-9]*)\s*,\s*
(?P<cat>[a-z_]+)\s*,\s*
"(?P<desc>(?:[^"\\]+|\\(?s).(?-s))*)"\s*[})]
"#,
)
.unwrap()
});
static DEC_DEPRECATED_LINT_RE: SyncLazy<Regex> = SyncLazy::new(|| {
Regex::new(
r#"(?x)
declare_deprecated_lint!\s*[{(]\s*
(?:\s+///.*)*
\s+pub\s+(?P<name>[A-Z_][A-Z_0-9]*)\s*,\s*
"(?P<desc>(?:[^"\\]+|\\(?s).(?-s))*)"\s*[})]
"#,
)
.unwrap()
});
static NL_ESCAPE_RE: SyncLazy<Regex> = SyncLazy::new(|| Regex::new(r#"\\\n\s*"#).unwrap());
pub static DOCS_LINK: &str = "https://rust-lang.github.io/rust-clippy/master/index.html";
/// Lint data parsed from the Clippy source code.
#[derive(Clone, PartialEq, Debug)]
pub struct Lint {
pub name: String,
pub group: String,
pub desc: String,
pub deprecation: Option<String>,
pub module: String,
}
impl Lint {
#[must_use]
pub fn new(name: &str, group: &str, desc: &str, deprecation: Option<&str>, module: &str) -> Self {
Self {
name: name.to_lowercase(),
group: group.to_string(),
desc: NL_ESCAPE_RE.replace(&desc.replace("\\\"", "\""), "").to_string(),
deprecation: deprecation.map(ToString::to_string),
module: module.to_string(),
}
}
/// Returns all non-deprecated lints and non-internal lints
#[must_use]
pub fn usable_lints(lints: &[Self]) -> Vec<Self> {
lints
.iter()
.filter(|l| l.deprecation.is_none() && !l.group.starts_with("internal"))
.cloned()
.collect()
}
/// Returns all internal lints (not `internal_warn` lints)
#[must_use]
pub fn internal_lints(lints: &[Self]) -> Vec<Self> {
lints.iter().filter(|l| l.group == "internal").cloned().collect()
}
/// Returns all deprecated lints
#[must_use]
pub fn deprecated_lints(lints: &[Self]) -> Vec<Self> {
lints.iter().filter(|l| l.deprecation.is_some()).cloned().collect()
}
/// Returns the lints in a `HashMap`, grouped by the different lint groups
#[must_use]
pub fn by_lint_group(lints: impl Iterator<Item = Self>) -> HashMap<String, Vec<Self>> {
lints.map(|lint| (lint.group.to_string(), lint)).into_group_map()
}
}
/// Generates the code for registering a group
pub fn gen_lint_group_list<'a>(group_name: &str, lints: impl Iterator<Item = &'a Lint>) -> String {
let mut details: Vec<_> = lints.map(|l| (&l.module, l.name.to_uppercase())).collect();
details.sort_unstable();
let mut output = GENERATED_FILE_COMMENT.to_string();
output.push_str(&format!(
"store.register_group(true, \"clippy::{0}\", Some(\"clippy_{0}\"), vec![\n",
group_name
));
for (module, name) in details {
output.push_str(&format!(" LintId::of({}::{}),\n", module, name));
}
output.push_str("])\n");
output
}
/// Generates the module declarations for `lints`
#[must_use]
pub fn gen_modules_list<'a>(lints: impl Iterator<Item = &'a Lint>) -> String {
let module_names: BTreeSet<_> = lints.map(|l| &l.module).collect();
let mut output = GENERATED_FILE_COMMENT.to_string();
for name in module_names {
output.push_str(&format!("mod {};\n", name));
}
output
}
/// Generates the list of lint links at the bottom of the README
#[must_use]
pub fn gen_changelog_lint_list<'a>(lints: impl Iterator<Item = &'a Lint>) -> Vec<String> {
lints
.sorted_by_key(|l| &l.name)
.map(|l| format!("[`{}`]: {}#{}", l.name, DOCS_LINK, l.name))
.collect()
}
/// Generates the `register_removed` code
#[must_use]
pub fn gen_deprecated<'a>(lints: impl Iterator<Item = &'a Lint>) -> String {
let mut output = GENERATED_FILE_COMMENT.to_string();
output.push_str("{\n");
for Lint { name, deprecation, .. } in lints {
output.push_str(&format!(
concat!(
" store.register_removed(\n",
" \"clippy::{}\",\n",
" \"{}\",\n",
" );\n"
),
name,
deprecation.as_ref().expect("`lints` are deprecated")
));
}
output.push_str("}\n");
output
}
/// Generates the code for registering lints
#[must_use]
pub fn gen_register_lint_list<'a>(
internal_lints: impl Iterator<Item = &'a Lint>,
usable_lints: impl Iterator<Item = &'a Lint>,
) -> String {
let mut details: Vec<_> = internal_lints
.map(|l| (false, &l.module, l.name.to_uppercase()))
.chain(usable_lints.map(|l| (true, &l.module, l.name.to_uppercase())))
.collect();
details.sort_unstable();
let mut output = GENERATED_FILE_COMMENT.to_string();
output.push_str("store.register_lints(&[\n");
for (is_public, module_name, lint_name) in details {
if !is_public {
output.push_str(" #[cfg(feature = \"internal-lints\")]\n");
}
output.push_str(&format!(" {}::{},\n", module_name, lint_name));
}
output.push_str("])\n");
output
}
/// Gathers all files in `src/clippy_lints` and gathers all lints inside
pub fn gather_all() -> impl Iterator<Item = Lint> {
lint_files().flat_map(|f| gather_from_file(&f))
}
fn gather_from_file(dir_entry: &walkdir::DirEntry) -> impl Iterator<Item = Lint> {
let content = fs::read_to_string(dir_entry.path()).unwrap();
let path = dir_entry.path();
let filename = path.file_stem().unwrap();
let path_buf = path.with_file_name(filename);
let mut rel_path = path_buf
.strip_prefix(clippy_project_root().join("clippy_lints/src"))
.expect("only files in `clippy_lints/src` should be looked at");
// If the lints are stored in mod.rs, we get the module name from
// the containing directory:
if filename == "mod" {
rel_path = rel_path.parent().unwrap();
}
let module = rel_path
.components()
.map(|c| c.as_os_str().to_str().unwrap())
.collect::<Vec<_>>()
.join("::");
parse_contents(&content, &module)
}
fn parse_contents(content: &str, module: &str) -> impl Iterator<Item = Lint> {
let lints = DEC_CLIPPY_LINT_RE
.captures_iter(content)
.map(|m| Lint::new(&m["name"], &m["cat"], &m["desc"], None, module));
let deprecated = DEC_DEPRECATED_LINT_RE
.captures_iter(content)
.map(|m| Lint::new(&m["name"], "Deprecated", &m["desc"], Some(&m["desc"]), module));
// Removing the `.collect::<Vec<Lint>>().into_iter()` causes some lifetime issues due to the map
lints.chain(deprecated).collect::<Vec<Lint>>().into_iter()
}
/// Collects all .rs files in the `clippy_lints/src` directory
fn lint_files() -> impl Iterator<Item = walkdir::DirEntry> {
// We use `WalkDir` instead of `fs::read_dir` here in order to recurse into subdirectories.
// Otherwise we would not collect all the lints, for example in `clippy_lints/src/methods/`.
let path = clippy_project_root().join("clippy_lints/src");
WalkDir::new(path)
.into_iter()
.filter_map(Result::ok)
.filter(|f| f.path().extension() == Some(OsStr::new("rs")))
}
/// Whether a file has had its text changed or not
#[derive(PartialEq, Debug)]
pub struct FileChange {
pub changed: bool,
pub new_lines: String,
}
/// Replaces a region in a file delimited by two lines matching regexes.
///
/// `path` is the relative path to the file on which you want to perform the replacement.
///
/// See `replace_region_in_text` for documentation of the other options.
///
/// # Panics
///
/// Panics if the path could not read or then written
pub fn replace_region_in_file<F>(
path: &Path,
start: &str,
end: &str,
replace_start: bool,
write_back: bool,
replacements: F,
) -> FileChange
where
F: FnOnce() -> Vec<String>,
{
let contents = fs::read_to_string(path).unwrap_or_else(|e| panic!("Cannot read from {}: {}", path.display(), e));
let file_change = replace_region_in_text(&contents, start, end, replace_start, replacements);
if write_back {
if let Err(e) = fs::write(path, file_change.new_lines.as_bytes()) {
panic!("Cannot write to {}: {}", path.display(), e);
}
}
file_change
}
/// Replaces a region in a text delimited by two lines matching regexes.
///
/// * `text` is the input text on which you want to perform the replacement
/// * `start` is a `&str` that describes the delimiter line before the region you want to replace.
/// As the `&str` will be converted to a `Regex`, this can contain regex syntax, too.
/// * `end` is a `&str` that describes the delimiter line until where the replacement should happen.
/// As the `&str` will be converted to a `Regex`, this can contain regex syntax, too.
/// * If `replace_start` is true, the `start` delimiter line is replaced as well. The `end`
/// delimiter line is never replaced.
/// * `replacements` is a closure that has to return a `Vec<String>` which contains the new text.
///
/// If you want to perform the replacement on files instead of already parsed text,
/// use `replace_region_in_file`.
///
/// # Example
///
/// ```
/// let the_text = "replace_start\nsome text\nthat will be replaced\nreplace_end";
/// let result =
/// clippy_dev::replace_region_in_text(the_text, "replace_start", "replace_end", false, || {
/// vec!["a different".to_string(), "text".to_string()]
/// })
/// .new_lines;
/// assert_eq!("replace_start\na different\ntext\nreplace_end", result);
/// ```
///
/// # Panics
///
/// Panics if start or end is not valid regex
pub fn replace_region_in_text<F>(text: &str, start: &str, end: &str, replace_start: bool, replacements: F) -> FileChange
where
F: FnOnce() -> Vec<String>,
{
let replace_it = replacements();
let mut in_old_region = false;
let mut found = false;
let mut new_lines = vec![];
let start = Regex::new(start).unwrap();
let end = Regex::new(end).unwrap();
for line in text.lines() {
if in_old_region {
if end.is_match(line) {
in_old_region = false;
new_lines.extend(replace_it.clone());
new_lines.push(line.to_string());
}
} else if start.is_match(line) {
if !replace_start {
new_lines.push(line.to_string());
}
in_old_region = true;
found = true;
} else {
new_lines.push(line.to_string());
}
}
if !found {
// This happens if the provided regex in `clippy_dev/src/main.rs` does not match in the
// given text or file. Most likely this is an error on the programmer's side and the Regex
// is incorrect.
eprintln!("error: regex \n{:?}\ndoesn't match. You may have to update it.", start);
std::process::exit(1);
}
let mut new_lines = new_lines.join("\n");
if text.ends_with('\n') {
new_lines.push('\n');
}
let changed = new_lines != text;
FileChange { changed, new_lines }
}
/// Returns the path to the Clippy project directory
///
/// # Panics
@ -376,212 +36,3 @@ pub fn clippy_project_root() -> PathBuf {
}
panic!("error: Can't determine root of project. Please run inside a Clippy working dir.");
}
#[test]
fn test_parse_contents() {
let result: Vec<Lint> = parse_contents(
r#"
declare_clippy_lint! {
pub PTR_ARG,
style,
"really long \
text"
}
declare_clippy_lint!{
pub DOC_MARKDOWN,
pedantic,
"single line"
}
/// some doc comment
declare_deprecated_lint! {
pub SHOULD_ASSERT_EQ,
"`assert!()` will be more flexible with RFC 2011"
}
"#,
"module_name",
)
.collect();
let expected = vec![
Lint::new("ptr_arg", "style", "really long text", None, "module_name"),
Lint::new("doc_markdown", "pedantic", "single line", None, "module_name"),
Lint::new(
"should_assert_eq",
"Deprecated",
"`assert!()` will be more flexible with RFC 2011",
Some("`assert!()` will be more flexible with RFC 2011"),
"module_name",
),
];
assert_eq!(expected, result);
}
#[test]
fn test_replace_region() {
let text = "\nabc\n123\n789\ndef\nghi";
let expected = FileChange {
changed: true,
new_lines: "\nabc\nhello world\ndef\nghi".to_string(),
};
let result = replace_region_in_text(text, r#"^\s*abc$"#, r#"^\s*def"#, false, || {
vec!["hello world".to_string()]
});
assert_eq!(expected, result);
}
#[test]
fn test_replace_region_with_start() {
let text = "\nabc\n123\n789\ndef\nghi";
let expected = FileChange {
changed: true,
new_lines: "\nhello world\ndef\nghi".to_string(),
};
let result = replace_region_in_text(text, r#"^\s*abc$"#, r#"^\s*def"#, true, || {
vec!["hello world".to_string()]
});
assert_eq!(expected, result);
}
#[test]
fn test_replace_region_no_changes() {
let text = "123\n456\n789";
let expected = FileChange {
changed: false,
new_lines: "123\n456\n789".to_string(),
};
let result = replace_region_in_text(text, r#"^\s*123$"#, r#"^\s*456"#, false, Vec::new);
assert_eq!(expected, result);
}
#[test]
fn test_usable_lints() {
let lints = vec![
Lint::new("should_assert_eq", "Deprecated", "abc", Some("Reason"), "module_name"),
Lint::new("should_assert_eq2", "Not Deprecated", "abc", None, "module_name"),
Lint::new("should_assert_eq2", "internal", "abc", None, "module_name"),
Lint::new("should_assert_eq2", "internal_style", "abc", None, "module_name"),
];
let expected = vec![Lint::new(
"should_assert_eq2",
"Not Deprecated",
"abc",
None,
"module_name",
)];
assert_eq!(expected, Lint::usable_lints(&lints));
}
#[test]
fn test_by_lint_group() {
let lints = vec![
Lint::new("should_assert_eq", "group1", "abc", None, "module_name"),
Lint::new("should_assert_eq2", "group2", "abc", None, "module_name"),
Lint::new("incorrect_match", "group1", "abc", None, "module_name"),
];
let mut expected: HashMap<String, Vec<Lint>> = HashMap::new();
expected.insert(
"group1".to_string(),
vec![
Lint::new("should_assert_eq", "group1", "abc", None, "module_name"),
Lint::new("incorrect_match", "group1", "abc", None, "module_name"),
],
);
expected.insert(
"group2".to_string(),
vec![Lint::new("should_assert_eq2", "group2", "abc", None, "module_name")],
);
assert_eq!(expected, Lint::by_lint_group(lints.into_iter()));
}
#[test]
fn test_gen_changelog_lint_list() {
let lints = vec![
Lint::new("should_assert_eq", "group1", "abc", None, "module_name"),
Lint::new("should_assert_eq2", "group2", "abc", None, "module_name"),
];
let expected = vec![
format!("[`should_assert_eq`]: {}#should_assert_eq", DOCS_LINK.to_string()),
format!("[`should_assert_eq2`]: {}#should_assert_eq2", DOCS_LINK.to_string()),
];
assert_eq!(expected, gen_changelog_lint_list(lints.iter()));
}
#[test]
fn test_gen_deprecated() {
let lints = vec![
Lint::new(
"should_assert_eq",
"group1",
"abc",
Some("has been superseded by should_assert_eq2"),
"module_name",
),
Lint::new(
"another_deprecated",
"group2",
"abc",
Some("will be removed"),
"module_name",
),
];
let expected = GENERATED_FILE_COMMENT.to_string()
+ &[
"{",
" store.register_removed(",
" \"clippy::should_assert_eq\",",
" \"has been superseded by should_assert_eq2\",",
" );",
" store.register_removed(",
" \"clippy::another_deprecated\",",
" \"will be removed\",",
" );",
"}",
]
.join("\n")
+ "\n";
assert_eq!(expected, gen_deprecated(lints.iter()));
}
#[test]
#[should_panic]
fn test_gen_deprecated_fail() {
let lints = vec![Lint::new("should_assert_eq2", "group2", "abc", None, "module_name")];
let _deprecated_lints = gen_deprecated(lints.iter());
}
#[test]
fn test_gen_modules_list() {
let lints = vec![
Lint::new("should_assert_eq", "group1", "abc", None, "module_name"),
Lint::new("incorrect_stuff", "group3", "abc", None, "another_module"),
];
let expected = GENERATED_FILE_COMMENT.to_string() + &["mod another_module;", "mod module_name;"].join("\n") + "\n";
assert_eq!(expected, gen_modules_list(lints.iter()));
}
#[test]
fn test_gen_lint_group_list() {
let lints = vec![
Lint::new("abc", "group1", "abc", None, "module_name"),
Lint::new("should_assert_eq", "group1", "abc", None, "module_name"),
Lint::new("internal", "internal_style", "abc", None, "module_name"),
];
let expected = GENERATED_FILE_COMMENT.to_string()
+ &[
"store.register_group(true, \"clippy::group1\", Some(\"clippy_group1\"), vec![",
" LintId::of(module_name::ABC),",
" LintId::of(module_name::INTERNAL),",
" LintId::of(module_name::SHOULD_ASSERT_EQ),",
"])",
]
.join("\n")
+ "\n";
let result = gen_lint_group_list("group1", lints.iter());
assert_eq!(expected, result);
}

554
clippy_dev/src/update_lints.rs
View file

@ -1,9 +1,45 @@
use crate::{
gather_all, gen_changelog_lint_list, gen_deprecated, gen_lint_group_list, gen_modules_list, gen_register_lint_list,
replace_region_in_file, Lint, DOCS_LINK,
};
use itertools::Itertools;
use regex::Regex;
use std::collections::{BTreeSet, HashMap};
use std::ffi::OsStr;
use std::fs;
use std::lazy::SyncLazy;
use std::path::Path;
use walkdir::WalkDir;
use crate::clippy_project_root;
const GENERATED_FILE_COMMENT: &str = "// This file was generated by `cargo dev update_lints`.\n\
// Use that command to update this file and do not edit by hand.\n\
// Manual edits will be overwritten.\n\n";
static DEC_CLIPPY_LINT_RE: SyncLazy<Regex> = SyncLazy::new(|| {
Regex::new(
r#"(?x)
declare_clippy_lint!\s*[\{(]
(?:\s+///.*)*
\s+pub\s+(?P<name>[A-Z_][A-Z_0-9]*)\s*,\s*
(?P<cat>[a-z_]+)\s*,\s*
"(?P<desc>(?:[^"\\]+|\\(?s).(?-s))*)"\s*[})]
"#,
)
.unwrap()
});
static DEC_DEPRECATED_LINT_RE: SyncLazy<Regex> = SyncLazy::new(|| {
Regex::new(
r#"(?x)
declare_deprecated_lint!\s*[{(]\s*
(?:\s+///.*)*
\s+pub\s+(?P<name>[A-Z_][A-Z_0-9]*)\s*,\s*
"(?P<desc>(?:[^"\\]+|\\(?s).(?-s))*)"\s*[})]
"#,
)
.unwrap()
});
static NL_ESCAPE_RE: SyncLazy<Regex> = SyncLazy::new(|| Regex::new(r#"\\\n\s*"#).unwrap());
static DOCS_LINK: &str = "https://rust-lang.github.io/rust-clippy/master/index.html";
#[derive(Clone, Copy, PartialEq)]
pub enum UpdateMode {
@ -147,3 +183,513 @@ fn exit_with_failure() {
);
std::process::exit(1);
}
/// Lint data parsed from the Clippy source code.
#[derive(Clone, PartialEq, Debug)]
struct Lint {
name: String,
group: String,
desc: String,
deprecation: Option<String>,
module: String,
}
impl Lint {
#[must_use]
fn new(name: &str, group: &str, desc: &str, deprecation: Option<&str>, module: &str) -> Self {
Self {
name: name.to_lowercase(),
group: group.to_string(),
desc: NL_ESCAPE_RE.replace(&desc.replace("\\\"", "\""), "").to_string(),
deprecation: deprecation.map(ToString::to_string),
module: module.to_string(),
}
}
/// Returns all non-deprecated lints and non-internal lints
#[must_use]
fn usable_lints(lints: &[Self]) -> Vec<Self> {
lints
.iter()
.filter(|l| l.deprecation.is_none() && !l.group.starts_with("internal"))
.cloned()
.collect()
}
/// Returns all internal lints (not `internal_warn` lints)
#[must_use]
fn internal_lints(lints: &[Self]) -> Vec<Self> {
lints.iter().filter(|l| l.group == "internal").cloned().collect()
}
/// Returns all deprecated lints
#[must_use]
fn deprecated_lints(lints: &[Self]) -> Vec<Self> {
lints.iter().filter(|l| l.deprecation.is_some()).cloned().collect()
}
/// Returns the lints in a `HashMap`, grouped by the different lint groups
#[must_use]
fn by_lint_group(lints: impl Iterator<Item = Self>) -> HashMap<String, Vec<Self>> {
lints.map(|lint| (lint.group.to_string(), lint)).into_group_map()
}
}
/// Generates the code for registering a group
fn gen_lint_group_list<'a>(group_name: &str, lints: impl Iterator<Item = &'a Lint>) -> String {
let mut details: Vec<_> = lints.map(|l| (&l.module, l.name.to_uppercase())).collect();
details.sort_unstable();
let mut output = GENERATED_FILE_COMMENT.to_string();
output.push_str(&format!(
"store.register_group(true, \"clippy::{0}\", Some(\"clippy_{0}\"), vec![\n",
group_name
));
for (module, name) in details {
output.push_str(&format!(" LintId::of({}::{}),\n", module, name));
}
output.push_str("])\n");
output
}
/// Generates the module declarations for `lints`
#[must_use]
fn gen_modules_list<'a>(lints: impl Iterator<Item = &'a Lint>) -> String {
let module_names: BTreeSet<_> = lints.map(|l| &l.module).collect();
let mut output = GENERATED_FILE_COMMENT.to_string();
for name in module_names {
output.push_str(&format!("mod {};\n", name));
}
output
}
/// Generates the list of lint links at the bottom of the README
#[must_use]
fn gen_changelog_lint_list<'a>(lints: impl Iterator<Item = &'a Lint>) -> Vec<String> {
lints
.sorted_by_key(|l| &l.name)
.map(|l| format!("[`{}`]: {}#{}", l.name, DOCS_LINK, l.name))
.collect()
}
/// Generates the `register_removed` code
#[must_use]
fn gen_deprecated<'a>(lints: impl Iterator<Item = &'a Lint>) -> String {
let mut output = GENERATED_FILE_COMMENT.to_string();
output.push_str("{\n");
for Lint { name, deprecation, .. } in lints {
output.push_str(&format!(
concat!(
" store.register_removed(\n",
" \"clippy::{}\",\n",
" \"{}\",\n",
" );\n"
),
name,
deprecation.as_ref().expect("`lints` are deprecated")
));
}
output.push_str("}\n");
output
}
/// Generates the code for registering lints
#[must_use]
fn gen_register_lint_list<'a>(
internal_lints: impl Iterator<Item = &'a Lint>,
usable_lints: impl Iterator<Item = &'a Lint>,
) -> String {
let mut details: Vec<_> = internal_lints
.map(|l| (false, &l.module, l.name.to_uppercase()))
.chain(usable_lints.map(|l| (true, &l.module, l.name.to_uppercase())))
.collect();
details.sort_unstable();
let mut output = GENERATED_FILE_COMMENT.to_string();
output.push_str("store.register_lints(&[\n");
for (is_public, module_name, lint_name) in details {
if !is_public {
output.push_str(" #[cfg(feature = \"internal-lints\")]\n");
}
output.push_str(&format!(" {}::{},\n", module_name, lint_name));
}
output.push_str("])\n");
output
}
/// Gathers all files in `src/clippy_lints` and gathers all lints inside
fn gather_all() -> impl Iterator<Item = Lint> {
lint_files().flat_map(|f| gather_from_file(&f))
}
fn gather_from_file(dir_entry: &walkdir::DirEntry) -> impl Iterator<Item = Lint> {
let content = fs::read_to_string(dir_entry.path()).unwrap();
let path = dir_entry.path();
let filename = path.file_stem().unwrap();
let path_buf = path.with_file_name(filename);
let mut rel_path = path_buf
.strip_prefix(clippy_project_root().join("clippy_lints/src"))
.expect("only files in `clippy_lints/src` should be looked at");
// If the lints are stored in mod.rs, we get the module name from
// the containing directory:
if filename == "mod" {
rel_path = rel_path.parent().unwrap();
}
let module = rel_path
.components()
.map(|c| c.as_os_str().to_str().unwrap())
.collect::<Vec<_>>()
.join("::");
parse_contents(&content, &module)
}
fn parse_contents(content: &str, module: &str) -> impl Iterator<Item = Lint> {
let lints = DEC_CLIPPY_LINT_RE
.captures_iter(content)
.map(|m| Lint::new(&m["name"], &m["cat"], &m["desc"], None, module));
let deprecated = DEC_DEPRECATED_LINT_RE
.captures_iter(content)
.map(|m| Lint::new(&m["name"], "Deprecated", &m["desc"], Some(&m["desc"]), module));
// Removing the `.collect::<Vec<Lint>>().into_iter()` causes some lifetime issues due to the map
lints.chain(deprecated).collect::<Vec<Lint>>().into_iter()
}
/// Collects all .rs files in the `clippy_lints/src` directory
fn lint_files() -> impl Iterator<Item = walkdir::DirEntry> {
// We use `WalkDir` instead of `fs::read_dir` here in order to recurse into subdirectories.
// Otherwise we would not collect all the lints, for example in `clippy_lints/src/methods/`.
let path = clippy_project_root().join("clippy_lints/src");
WalkDir::new(path)
.into_iter()
.filter_map(Result::ok)
.filter(|f| f.path().extension() == Some(OsStr::new("rs")))
}
/// Whether a file has had its text changed or not
#[derive(PartialEq, Debug)]
struct FileChange {
changed: bool,
new_lines: String,
}
/// Replaces a region in a file delimited by two lines matching regexes.
///
/// `path` is the relative path to the file on which you want to perform the replacement.
///
/// See `replace_region_in_text` for documentation of the other options.
///
/// # Panics
///
/// Panics if the path could not read or then written
fn replace_region_in_file<F>(
path: &Path,
start: &str,
end: &str,
replace_start: bool,
write_back: bool,
replacements: F,
) -> FileChange
where
F: FnOnce() -> Vec<String>,
{
let contents = fs::read_to_string(path).unwrap_or_else(|e| panic!("Cannot read from {}: {}", path.display(), e));
let file_change = replace_region_in_text(&contents, start, end, replace_start, replacements);
if write_back {
if let Err(e) = fs::write(path, file_change.new_lines.as_bytes()) {
panic!("Cannot write to {}: {}", path.display(), e);
}
}
file_change
}
/// Replaces a region in a text delimited by two lines matching regexes.
///
/// * `text` is the input text on which you want to perform the replacement
/// * `start` is a `&str` that describes the delimiter line before the region you want to replace.
/// As the `&str` will be converted to a `Regex`, this can contain regex syntax, too.
/// * `end` is a `&str` that describes the delimiter line until where the replacement should happen.
/// As the `&str` will be converted to a `Regex`, this can contain regex syntax, too.
/// * If `replace_start` is true, the `start` delimiter line is replaced as well. The `end`
/// delimiter line is never replaced.
/// * `replacements` is a closure that has to return a `Vec<String>` which contains the new text.
///
/// If you want to perform the replacement on files instead of already parsed text,
/// use `replace_region_in_file`.
///
/// # Example
///
/// ```ignore
/// let the_text = "replace_start\nsome text\nthat will be replaced\nreplace_end";
/// let result =
/// replace_region_in_text(the_text, "replace_start", "replace_end", false, || {
/// vec!["a different".to_string(), "text".to_string()]
/// })
/// .new_lines;
/// assert_eq!("replace_start\na different\ntext\nreplace_end", result);
/// ```
///
/// # Panics
///
/// Panics if start or end is not valid regex
fn replace_region_in_text<F>(text: &str, start: &str, end: &str, replace_start: bool, replacements: F) -> FileChange
where
F: FnOnce() -> Vec<String>,
{
let replace_it = replacements();
let mut in_old_region = false;
let mut found = false;
let mut new_lines = vec![];
let start = Regex::new(start).unwrap();
let end = Regex::new(end).unwrap();
for line in text.lines() {
if in_old_region {
if end.is_match(line) {
in_old_region = false;
new_lines.extend(replace_it.clone());
new_lines.push(line.to_string());
}
} else if start.is_match(line) {
if !replace_start {
new_lines.push(line.to_string());
}
in_old_region = true;
found = true;
} else {
new_lines.push(line.to_string());
}
}
if !found {
// This happens if the provided regex in `clippy_dev/src/main.rs` does not match in the
// given text or file. Most likely this is an error on the programmer's side and the Regex
// is incorrect.
eprintln!("error: regex \n{:?}\ndoesn't match. You may have to update it.", start);
std::process::exit(1);
}
let mut new_lines = new_lines.join("\n");
if text.ends_with('\n') {
new_lines.push('\n');
}
let changed = new_lines != text;
FileChange { changed, new_lines }
}
#[test]
fn test_parse_contents() {
let result: Vec<Lint> = parse_contents(
r#"
declare_clippy_lint! {
pub PTR_ARG,
style,
"really long \
text"
}
declare_clippy_lint!{
pub DOC_MARKDOWN,
pedantic,
"single line"
}
/// some doc comment
declare_deprecated_lint! {
pub SHOULD_ASSERT_EQ,
"`assert!()` will be more flexible with RFC 2011"
}
"#,
"module_name",
)
.collect();
let expected = vec![
Lint::new("ptr_arg", "style", "really long text", None, "module_name"),
Lint::new("doc_markdown", "pedantic", "single line", None, "module_name"),
Lint::new(
"should_assert_eq",
"Deprecated",
"`assert!()` will be more flexible with RFC 2011",
Some("`assert!()` will be more flexible with RFC 2011"),
"module_name",
),
];
assert_eq!(expected, result);
}
#[test]
fn test_replace_region() {
let text = "\nabc\n123\n789\ndef\nghi";
let expected = FileChange {
changed: true,
new_lines: "\nabc\nhello world\ndef\nghi".to_string(),
};
let result = replace_region_in_text(text, r#"^\s*abc$"#, r#"^\s*def"#, false, || {
vec!["hello world".to_string()]
});
assert_eq!(expected, result);
}
#[test]
fn test_replace_region_with_start() {
let text = "\nabc\n123\n789\ndef\nghi";
let expected = FileChange {
changed: true,
new_lines: "\nhello world\ndef\nghi".to_string(),
};
let result = replace_region_in_text(text, r#"^\s*abc$"#, r#"^\s*def"#, true, || {
vec!["hello world".to_string()]
});
assert_eq!(expected, result);
}
#[test]
fn test_replace_region_no_changes() {
let text = "123\n456\n789";
let expected = FileChange {
changed: false,
new_lines: "123\n456\n789".to_string(),
};
let result = replace_region_in_text(text, r#"^\s*123$"#, r#"^\s*456"#, false, Vec::new);
assert_eq!(expected, result);
}
#[test]
fn test_usable_lints() {
let lints = vec![
Lint::new("should_assert_eq", "Deprecated", "abc", Some("Reason"), "module_name"),
Lint::new("should_assert_eq2", "Not Deprecated", "abc", None, "module_name"),
Lint::new("should_assert_eq2", "internal", "abc", None, "module_name"),
Lint::new("should_assert_eq2", "internal_style", "abc", None, "module_name"),
];
let expected = vec![Lint::new(
"should_assert_eq2",
"Not Deprecated",
"abc",
None,
"module_name",
)];
assert_eq!(expected, Lint::usable_lints(&lints));
}
#[test]
fn test_by_lint_group() {
let lints = vec![
Lint::new("should_assert_eq", "group1", "abc", None, "module_name"),
Lint::new("should_assert_eq2", "group2", "abc", None, "module_name"),
Lint::new("incorrect_match", "group1", "abc", None, "module_name"),
];
let mut expected: HashMap<String, Vec<Lint>> = HashMap::new();
expected.insert(
"group1".to_string(),
vec![
Lint::new("should_assert_eq", "group1", "abc", None, "module_name"),
Lint::new("incorrect_match", "group1", "abc", None, "module_name"),
],
);
expected.insert(
"group2".to_string(),
vec![Lint::new("should_assert_eq2", "group2", "abc", None, "module_name")],
);
assert_eq!(expected, Lint::by_lint_group(lints.into_iter()));
}
#[test]
fn test_gen_changelog_lint_list() {
let lints = vec![
Lint::new("should_assert_eq", "group1", "abc", None, "module_name"),
Lint::new("should_assert_eq2", "group2", "abc", None, "module_name"),
];
let expected = vec![
format!("[`should_assert_eq`]: {}#should_assert_eq", DOCS_LINK.to_string()),
format!("[`should_assert_eq2`]: {}#should_assert_eq2", DOCS_LINK.to_string()),
];
assert_eq!(expected, gen_changelog_lint_list(lints.iter()));
}
#[test]
fn test_gen_deprecated() {
let lints = vec![
Lint::new(
"should_assert_eq",
"group1",
"abc",
Some("has been superseded by should_assert_eq2"),
"module_name",
),
Lint::new(
"another_deprecated",
"group2",
"abc",
Some("will be removed"),
"module_name",
),
];
let expected = GENERATED_FILE_COMMENT.to_string()
+ &[
"{",
" store.register_removed(",
" \"clippy::should_assert_eq\",",
" \"has been superseded by should_assert_eq2\",",
" );",
" store.register_removed(",
" \"clippy::another_deprecated\",",
" \"will be removed\",",
" );",
"}",
]
.join("\n")
+ "\n";
assert_eq!(expected, gen_deprecated(lints.iter()));
}
#[test]
#[should_panic]
fn test_gen_deprecated_fail() {
let lints = vec![Lint::new("should_assert_eq2", "group2", "abc", None, "module_name")];
let _deprecated_lints = gen_deprecated(lints.iter());
}
#[test]
fn test_gen_modules_list() {
let lints = vec![
Lint::new("should_assert_eq", "group1", "abc", None, "module_name"),
Lint::new("incorrect_stuff", "group3", "abc", None, "another_module"),
];
let expected = GENERATED_FILE_COMMENT.to_string() + &["mod another_module;", "mod module_name;"].join("\n") + "\n";
assert_eq!(expected, gen_modules_list(lints.iter()));
}
#[test]
fn test_gen_lint_group_list() {
let lints = vec![
Lint::new("abc", "group1", "abc", None, "module_name"),
Lint::new("should_assert_eq", "group1", "abc", None, "module_name"),
Lint::new("internal", "internal_style", "abc", None, "module_name"),
];
let expected = GENERATED_FILE_COMMENT.to_string()
+ &[
"store.register_group(true, \"clippy::group1\", Some(\"clippy_group1\"), vec![",
" LintId::of(module_name::ABC),",
" LintId::of(module_name::INTERNAL),",
" LintId::of(module_name::SHOULD_ASSERT_EQ),",
"])",
]
.join("\n")
+ "\n";
let result = gen_lint_group_list("group1", lints.iter());
assert_eq!(expected, result);
}