Add lint for intra link resolution failure

src/librustdoc/clean/mod.rs

@@ -21,7 +21,7 @@ pub use self::Visibility::{Public, Inherited};
 
 use syntax;
 use rustc_target::spec::abi::Abi;
-use syntax::ast::{self, AttrStyle, Ident};
+use syntax::ast::{self, AttrStyle, NodeId, Ident};
 use syntax::attr;
 use syntax::codemap::{dummy_spanned, Spanned};
 use syntax::feature_gate::UnstableFeatures;
@@ -46,9 +46,10 @@ use rustc::middle::stability;
 use rustc::util::nodemap::{FxHashMap, FxHashSet};
 use rustc_typeck::hir_ty_to_ty;
 use rustc::infer::region_constraints::{RegionConstraintData, Constraint};
+use rustc::lint as lint;
+
 use std::collections::hash_map::Entry;
 use std::fmt;
-
 use std::default::Default;
 use std::{mem, slice, vec};
 use std::iter::{FromIterator, once};
@@ -1283,10 +1284,16 @@ fn resolution_failure(
                 link_range.end + code_dox_len,
             );
 
-            diag = cx.sess().struct_span_warn(sp, &msg);
+            diag = cx.tcx.struct_span_lint_node(lint::builtin::INTRA_LINK_RESOLUTION_FAILURE,
+                                                NodeId::new(0),
+                                                sp,
+                                                &msg);
             diag.span_label(sp, "cannot be resolved, ignoring");
         } else {
-            diag = cx.sess().struct_span_warn(sp, &msg);
+            diag = cx.tcx.struct_span_lint_node(lint::builtin::INTRA_LINK_RESOLUTION_FAILURE,
+                                                NodeId::new(0),
+                                                sp,
+                                                &msg);
 
             let last_new_line_offset = dox[..link_range.start].rfind('\n').map_or(0, |n| n + 1);
             let line = dox[last_new_line_offset..].lines().next().unwrap_or("");
@@ -1303,7 +1310,10 @@ fn resolution_failure(
         }
         diag
     } else {
-        cx.sess().struct_span_warn(sp, &msg)
+        cx.tcx.struct_span_lint_node(lint::builtin::INTRA_LINK_RESOLUTION_FAILURE,
+                                                NodeId::new(0),
+                                                sp,
+                                                &msg)
     };
     diag.emit();
 }

src/librustdoc/core.rs

@@ -17,7 +17,7 @@ use rustc::middle::cstore::CrateStore;
 use rustc::middle::privacy::AccessLevels;
 use rustc::ty::{self, TyCtxt, AllArenas};
 use rustc::hir::map as hir_map;
-use rustc::lint;
+use rustc::lint::{self, LintPass};
 use rustc::session::config::ErrorOutputType;
 use rustc::util::nodemap::{FxHashMap, FxHashSet};
 use rustc_resolve as resolve;
@@ -187,7 +187,23 @@ pub fn run_core(search_paths: SearchPaths,
         _ => None
     };
 
-    let warning_lint = lint::builtin::WARNINGS.name_lower();
+    let intra_link_resolution_failure_name = lint::builtin::INTRA_LINK_RESOLUTION_FAILURE.name;
+    let warnings_lint_name = lint::builtin::WARNINGS.name;
+    let lints = lint::builtin::HardwiredLints.get_lints()
+                    .iter()
+                    .filter_map(|lint| {
+                        if lint.name == warnings_lint_name {
+                            None
+                        } else {
+                            let level = if lint.name == intra_link_resolution_failure_name {
+                                lint::Warn
+                            } else {
+                                lint::Allow
+                            };
+                            Some((lint.name_lower(), level))
+                        }
+                    })
+                    .collect::<Vec<_>>();
 
     let host_triple = TargetTriple::from_triple(config::host_triple());
     // plays with error output here!
@@ -195,8 +211,12 @@ pub fn run_core(search_paths: SearchPaths,
         maybe_sysroot,
         search_paths,
         crate_types: vec![config::CrateTypeRlib],
-        lint_opts: if !allow_warnings { vec![(warning_lint, lint::Allow)] } else { vec![] },
-        lint_cap: Some(lint::Allow),
+        lint_opts: if !allow_warnings {
+            lints
+        } else {
+            vec![]
+        },
+        lint_cap: Some(lint::Warn),
         cg,
         externs,
         target_triple: triple.unwrap_or(host_triple),