Auto merge of #51732 - GuillaumeGomez:cmd-line-lint-rustdoc, r=QuietMisdreavus

Add command line lint manipulation in rustdoc

Fixes #50082.

r? @QuietMisdreavus

src/librustc/session/config.rs

@@ -1747,6 +1747,29 @@ pub fn parse_cfgspecs(cfgspecs: Vec<String>) -> ast::CrateConfig {
         .collect::<ast::CrateConfig>()
 }
 
+pub fn get_cmd_lint_options(matches: &getopts::Matches,
+                            error_format: ErrorOutputType)
+                            -> (Vec<(String, lint::Level)>, bool, Option<lint::Level>) {
+    let mut lint_opts = vec![];
+    let mut describe_lints = false;
+
+    for &level in &[lint::Allow, lint::Warn, lint::Deny, lint::Forbid] {
+        for lint_name in matches.opt_strs(level.as_str()) {
+            if lint_name == "help" {
+                describe_lints = true;
+            } else {
+                lint_opts.push((lint_name.replace("-", "_"), level));
+            }
+        }
+    }
+
+    let lint_cap = matches.opt_str("cap-lints").map(|cap| {
+        lint::Level::from_str(&cap)
+            .unwrap_or_else(|| early_error(error_format, &format!("unknown lint level: `{}`", cap)))
+    });
+    (lint_opts, describe_lints, lint_cap)
+}
+
 pub fn build_session_options_and_crate_config(
     matches: &getopts::Matches,
 ) -> (Options, ast::CrateConfig) {
@@ -1824,23 +1847,7 @@ pub fn build_session_options_and_crate_config(
     let crate_types = parse_crate_types_from_list(unparsed_crate_types)
         .unwrap_or_else(|e| early_error(error_format, &e[..]));
 
-    let mut lint_opts = vec![];
+    let (lint_opts, describe_lints, lint_cap) = get_cmd_lint_options(matches, error_format);
-    let mut describe_lints = false;
-
-    for &level in &[lint::Allow, lint::Warn, lint::Deny, lint::Forbid] {
-        for lint_name in matches.opt_strs(level.as_str()) {
-            if lint_name == "help" {
-                describe_lints = true;
-            } else {
-                lint_opts.push((lint_name.replace("-", "_"), level));
-            }
-        }
-    }
-
-    let lint_cap = matches.opt_str("cap-lints").map(|cap| {
-        lint::Level::from_str(&cap)
-            .unwrap_or_else(|| early_error(error_format, &format!("unknown lint level: `{}`", cap)))
-    });
 
     let mut debugging_opts = build_debugging_options(matches, error_format);
 

src/librustdoc/core.rs

@@ -178,7 +178,10 @@ pub fn run_core(search_paths: SearchPaths,
                 force_unstable_if_unmarked: bool,
                 edition: Edition,
                 cg: CodegenOptions,
-                error_format: ErrorOutputType) -> (clean::Crate, RenderInfo)
+                error_format: ErrorOutputType,
+                cmd_lints: Vec<(String, lint::Level)>,
+                lint_cap: Option<lint::Level>,
+                describe_lints: bool) -> (clean::Crate, RenderInfo)
 {
     // Parse, resolve, and typecheck the given crate.
 
@@ -200,6 +203,7 @@ pub fn run_core(search_paths: SearchPaths,
                             Some((lint.name_lower(), lint::Allow))
                         }
                     })
+                    .chain(cmd_lints.into_iter())
                     .collect::<Vec<_>>();
 
     let host_triple = TargetTriple::from_triple(config::host_triple());
@@ -213,7 +217,7 @@ pub fn run_core(search_paths: SearchPaths,
         } else {
             vec![]
         },
-        lint_cap: Some(lint::Forbid),
+        lint_cap: Some(lint_cap.unwrap_or_else(|| lint::Forbid)),
         cg,
         externs,
         target_triple: triple.unwrap_or(host_triple),
@@ -226,6 +230,7 @@ pub fn run_core(search_paths: SearchPaths,
         },
         error_format,
         edition,
+        describe_lints,
         ..config::basic_options()
     };
     driver::spawn_thread_pool(sessopts, move |sessopts| {

src/librustdoc/lib.rs

@@ -68,6 +68,7 @@ use rustc::session::search_paths::SearchPaths;
 use rustc::session::config::{ErrorOutputType, RustcOptGroup, Externs, CodegenOptions};
 use rustc::session::config::{nightly_options, build_codegen_options};
 use rustc_target::spec::TargetTriple;
+use rustc::session::config::get_cmd_lint_options;
 
 #[macro_use]
 pub mod externalfiles;
@@ -308,6 +309,28 @@ pub fn opts() -> Vec<RustcOptGroup> {
                        "disable-minification",
                        "Disable minification applied on JS files")
         }),
+        unstable("warn", |o| {
+            o.optmulti("W", "warn", "Set lint warnings", "OPT")
+        }),
+        unstable("allow", |o| {
+            o.optmulti("A", "allow", "Set lint allowed", "OPT")
+        }),
+        unstable("deny", |o| {
+            o.optmulti("D", "deny", "Set lint denied", "OPT")
+        }),
+        unstable("forbid", |o| {
+            o.optmulti("F", "forbid", "Set lint forbidden", "OPT")
+        }),
+        unstable("cap-lints", |o| {
+            o.optmulti(
+                "",
+                "cap-lints",
+                "Set the most restrictive lint level. \
+                 More restrictive lints are capped at this \
+                 level. By default, it is at `forbid` level.",
+                "LEVEL",
+            )
+        }),
     ]
 }
 
@@ -640,6 +663,8 @@ where R: 'static + Send,
         *x == "force-unstable-if-unmarked"
     });
 
+    let (lint_opts, describe_lints, lint_cap) = get_cmd_lint_options(matches, error_format);
+
     let (tx, rx) = channel();
 
     rustc_driver::monitor(move || syntax::with_globals(move || {
@@ -648,7 +673,8 @@ where R: 'static + Send,
         let (mut krate, renderinfo) =
             core::run_core(paths, cfgs, externs, Input::File(cratefile), triple, maybe_sysroot,
                            display_warnings, crate_name.clone(),
-                           force_unstable_if_unmarked, edition, cg, error_format);
+                           force_unstable_if_unmarked, edition, cg, error_format,
+                           lint_opts, lint_cap, describe_lints);
 
         info!("finished with rustc");