update_lints rewrite: Add structure and --print-only

5 files changed, 459 insertions, 0 deletions

diff --git a/clippy_dev/.gitignore b/clippy_dev/.gitignore
new file mode 100644
index 00000000000..5ca1e06a5e5
--- /dev/null
+++ b/clippy_dev/.gitignore
@@ -0,0 +1,38 @@
+# Used by Travis to be able to push:
+/.github/deploy_key
+out
+
+# Compiled files
+*.o
+*.d
+*.so
+*.rlib
+*.dll
+*.pyc
+*.rmeta
+
+# Executables
+*.exe
+
+# Generated by Cargo
+Cargo.lock
+/target
+/clippy_lints/target
+/clippy_workspace_tests/target
+
+# Generated by dogfood
+/target_recur/
+
+# gh pages docs
+util/gh-pages/lints.json
+
+# rustfmt backups
+*.rs.bk
+
+helper.txt
+*.iml
+.vscode
+.idea
+
+# Used by the Clippy build script
+min_version.txt
diff --git a/clippy_dev/Cargo.lock b/clippy_dev/Cargo.lock
new file mode 100644
index 00000000000..ad5c705c292
--- /dev/null
+++ b/clippy_dev/Cargo.lock
@@ -0,0 +1,215 @@
+[[package]]
+name = "aho-corasick"
+version = "0.6.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "memchr 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "ansi_term"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "atty"
+version = "0.2.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "bitflags"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "clap"
+version = "2.32.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atty 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "strsim 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "textwrap 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "clippy_dev"
+version = "0.0.1"
+dependencies = [
+ "clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "lazy_static"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "libc"
+version = "0.2.42"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "memchr"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.42 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "redox_syscall"
+version = "0.1.40"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "redox_termios"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "redox_syscall 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "regex"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "aho-corasick 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "thread_local 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "utf8-ranges 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "ucd-util 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "strsim"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "termion"
+version = "1.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "textwrap"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "thread_local"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lazy_static 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unreachable 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "unicode-width"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "unreachable"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "utf8-ranges"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "vec_map"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "void"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "winapi"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
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diff --git a/clippy_dev/Cargo.toml b/clippy_dev/Cargo.toml
new file mode 100644
index 00000000000..010380907af
--- /dev/null
+++ b/clippy_dev/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "clippy_dev"
+version = "0.0.1"
+authors = ["Philipp Hansch <dev@phansch.net>"]
+
+[dependencies]
+clap = "~2.32"
+regex = "1"
+lazy_static = "1.0"
diff --git a/clippy_dev/src/lib.rs b/clippy_dev/src/lib.rs
new file mode 100644
index 00000000000..2a86de9cbaa
--- /dev/null
+++ b/clippy_dev/src/lib.rs
@@ -0,0 +1,144 @@
+extern crate regex;
+#[macro_use]
+extern crate lazy_static;
+
+use regex::Regex;
+use std::ffi::OsStr;
+use std::fs;
+use std::io::prelude::*;
+
+lazy_static! {
+    static ref DEC_CLIPPY_LINT_RE: Regex = Regex::new(r#"declare_clippy_lint!\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 ref DEC_DEPRECATED_LINT_RE: Regex = Regex::new(r#"declare_deprecated_lint!\s*[{(]\s*pub\s+(?P<name>[A-Z_][A-Z_0-9]*)\s*,\s*"(?P<desc>(?:[^"\\]+|\\(?s).(?-s))*)"\s*[})]"#).unwrap();
+    static ref NL_ESCAPE_RE: Regex = Regex::new(r#"\\\n\s*"#).unwrap();
+    pub static ref DOCS_LINK: String = "https://rust-lang-nursery.github.io/rust-clippy/master/index.html".to_string();
+}
+
+#[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 {
+    pub fn new(name: &str, group: &str, desc: &str, deprecation: Option<&str>, module: &str) -> Lint {
+        Lint {
+            name: name.to_lowercase(),
+            group: group.to_string(),
+            desc: NL_ESCAPE_RE.replace(&desc.replace("\\\"", "\""), "").to_string(),
+            deprecation: deprecation.map(|d| d.to_string()),
+            module: module.to_string(),
+        }
+    }
+
+    pub fn active_lints(lints: &[Lint]) -> Vec<Lint> {
+        lints.iter().filter(|l| l.deprecation.is_none()).cloned().collect::<Vec<Lint>>()
+    }
+
+    pub fn in_lint_group(group: &str, lints: &[Lint]) -> Vec<Lint> {
+        lints.iter().filter(|l| l.group == group).cloned().collect::<Vec<Lint>>()
+    }
+}
+
+pub fn collect_all() -> Vec<Lint> {
+    let mut lints = vec![];
+    for direntry in lint_files() {
+        lints.append(&mut collect_from_file(&direntry));
+    }
+    lints
+}
+
+fn collect_from_file(direntry: &fs::DirEntry) -> Vec<Lint> {
+    let mut file = fs::File::open(direntry.path()).unwrap();
+    let mut content = String::new();
+    file.read_to_string(&mut content).unwrap();
+    parse_contents(&content, direntry.path().file_stem().unwrap().to_str().unwrap())
+}
+
+fn parse_contents(content: &str, filename: &str) -> Vec<Lint> {
+    let mut lints: Vec<Lint> = DEC_CLIPPY_LINT_RE
+        .captures_iter(&content)
+        .map(|m| Lint::new(&m["name"], &m["cat"], &m["desc"], None, filename))
+        .collect();
+    let mut deprecated = DEC_DEPRECATED_LINT_RE
+        .captures_iter(&content)
+        .map(|m| Lint::new( &m["name"], "Deprecated", &m["desc"], Some(&m["desc"]), filename))
+        .collect();
+    lints.append(&mut deprecated);
+    lints
+}
+
+/// Collects all .rs files in the `clippy_lints/src` directory
+fn lint_files() -> Vec<fs::DirEntry> {
+    let paths = fs::read_dir("../clippy_lints/src").unwrap();
+    paths
+        .filter_map(|f| f.ok())
+        .filter(|f| f.path().extension() == Some(OsStr::new("rs")))
+        .collect::<Vec<fs::DirEntry>>()
+}
+
+#[test]
+fn test_parse_contents() {
+    let result = 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");
+
+    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_active_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")
+    ];
+    let expected = vec![
+        Lint::new("should_assert_eq2", "Not Deprecated", "abc", None, "module_name")
+    ];
+    assert_eq!(expected, Lint::active_lints(&lints));
+}
+
+#[test]
+fn test_in_lint_group() {
+    let lints = vec![
+        Lint::new("ptr_arg", "style", "really long text", None, "module_name"),
+        Lint::new("doc_markdown", "pedantic", "single line", None, "module_name"),
+    ];
+    let expected = vec![
+        Lint::new("ptr_arg", "style", "really long text", None, "module_name")
+    ];
+    assert_eq!(expected, Lint::in_lint_group("style", &lints));
+}
diff --git a/clippy_dev/src/main.rs b/clippy_dev/src/main.rs
new file mode 100644
index 00000000000..7bf6eb01245
--- /dev/null
+++ b/clippy_dev/src/main.rs
@@ -0,0 +1,53 @@
+extern crate clap;
+extern crate clippy_dev;
+extern crate regex;
+
+use clap::{App, Arg, SubCommand};
+use clippy_dev::*;
+
+fn main() {
+    let matches = App::new("Clippy developer tooling")
+        .subcommand(
+            SubCommand::with_name("update_lints")
+                .about("Update the lint list")
+                .arg(
+                    Arg::with_name("print-only")
+                        .long("print-only")
+                        .short("p")
+                        .help("Print a table of lints to STDOUT. Does not modify any files."),
+                )
+        )
+        .get_matches();
+
+    if let Some(matches) = matches.subcommand_matches("update_lints") {
+        if matches.is_present("print-only") {
+            print_lints();
+        }
+    }
+}
+
+fn print_lints() {
+    let lint_list = collect_all();
+    let print_clippy_lint_groups: [&str; 7] = [
+        "correctness",
+        "style",
+        "complexity",
+        "perf",
+        "pedantic",
+        "nursery",
+        "restriction"
+    ];
+    // We could use itertools' group_by to make this much more concise:
+    for group in &print_clippy_lint_groups {
+        println!("\n## {}", group);
+
+        let mut group_lints = Lint::in_lint_group(group, &lint_list);
+        group_lints.sort_by(|a, b| a.name.cmp(&b.name));
+
+        for lint in group_lints {
+            if lint.deprecation.is_some() { continue; }
+            println!("* [{}]({}#{}) ({})", lint.name, clippy_dev::DOCS_LINK.clone(), lint.name, lint.desc);
+        }
+    }
+    println!("there are {} lints", Lint::active_lints(&lint_list).len());
+}