clippy argument support

Author: Milo123459

src/bootstrap/check.rs

@@ -20,7 +20,15 @@ fn args(builder: &Builder<'_>) -> Vec<String> {
         arr.iter().copied().map(String::from)
     }
 
-    if let Subcommand::Clippy { fix, .. } = builder.config.cmd {
+    if let Subcommand::Clippy {
+        fix,
+        clippy_lint_allow,
+        clippy_lint_deny,
+        clippy_lint_warn,
+        clippy_lint_forbid,
+        ..
+    } = &builder.config.cmd
+    {
         // disable the most spammy clippy lints
         let ignored_lints = vec![
             "many_single_char_names", // there are a lot in stdarch
@@ -32,7 +40,7 @@ fn args(builder: &Builder<'_>) -> Vec<String> {
             "wrong_self_convention",
         ];
         let mut args = vec![];
-        if fix {
+        if *fix {
             #[rustfmt::skip]
             args.extend(strings(&[
                 "--fix", "-Zunstable-options",
@@ -44,6 +52,12 @@ fn args(builder: &Builder<'_>) -> Vec<String> {
         }
         args.extend(strings(&["--", "--cap-lints", "warn"]));
         args.extend(ignored_lints.iter().map(|lint| format!("-Aclippy::{}", lint)));
+        let mut clippy_lint_levels: Vec<String> = Vec::new();
+        clippy_lint_allow.iter().for_each(|v| clippy_lint_levels.push(format!("-A{}", v)));
+        clippy_lint_deny.iter().for_each(|v| clippy_lint_levels.push(format!("-D{}", v)));
+        clippy_lint_warn.iter().for_each(|v| clippy_lint_levels.push(format!("-W{}", v)));
+        clippy_lint_forbid.iter().for_each(|v| clippy_lint_levels.push(format!("-F{}", v)));
+        args.extend(clippy_lint_levels);
         args
     } else {
         vec![]

src/bootstrap/flags.rs

@@ -91,6 +91,10 @@ pub enum Subcommand {
     Clippy {
         fix: bool,
         paths: Vec<PathBuf>,
+        clippy_lint_allow: Vec<String>,
+        clippy_lint_deny: Vec<String>,
+        clippy_lint_warn: Vec<String>,
+        clippy_lint_forbid: Vec<String>,
     },
     Fix {
         paths: Vec<PathBuf>,
@@ -240,6 +244,10 @@ To learn more about a subcommand, run `./x.py <subcommand> -h`",
         opts.optopt("", "rust-profile-use", "use PGO profile for rustc build", "PROFILE");
         opts.optflag("", "llvm-profile-generate", "generate PGO profile with llvm built for rustc");
         opts.optopt("", "llvm-profile-use", "use PGO profile for llvm build", "PROFILE");
+        opts.optmulti("A", "", "allow certain clippy lints", "OPT");
+        opts.optmulti("D", "", "deny certain clippy lints", "OPT");
+        opts.optmulti("W", "", "warn about certain clippy lints", "OPT");
+        opts.optmulti("F", "", "forbid certain clippy lints", "OPT");
 
         // We can't use getopt to parse the options until we have completed specifying which
         // options are valid, but under the current implementation, some options are conditional on
@@ -538,7 +546,14 @@ Arguments:
                 }
                 Subcommand::Check { paths }
             }
-            Kind::Clippy => Subcommand::Clippy { paths, fix: matches.opt_present("fix") },
+            Kind::Clippy => Subcommand::Clippy {
+                paths,
+                fix: matches.opt_present("fix"),
+                clippy_lint_allow: matches.opt_strs("A"),
+                clippy_lint_warn: matches.opt_strs("W"),
+                clippy_lint_deny: matches.opt_strs("D"),
+                clippy_lint_forbid: matches.opt_strs("F"),
+            },
             Kind::Fix => Subcommand::Fix { paths },
             Kind::Test => Subcommand::Test {
                 paths,