Make local_crate_source_file depends on a remap path scope

compiler/rustc_codegen_cranelift/src/debuginfo/mod.rs

@@ -77,13 +77,14 @@ impl DebugContext {
                 FileNameDisplayPreference::Local
             })
             .into_owned();
-        let (name, file_info) = match tcx.sess.local_crate_source_file() {
-            Some(path) => {
-                let name = path.to_string_lossy().into_owned();
-                (name, None)
-            }
-            None => (tcx.crate_name(LOCAL_CRATE).to_string(), None),
-        };
+        let (name, file_info) =
+            match tcx.sess.local_crate_source_file(RemapPathScopeComponents::DEBUGINFO) {
+                Some(path) => {
+                    let name = path.to_string_lossy().into_owned();
+                    (name, None)
+                }
+                None => (tcx.crate_name(LOCAL_CRATE).to_string(), None),
+            };
 
         let mut line_program = LineProgram::new(
             encoding,

compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs

@@ -840,7 +840,7 @@ pub fn build_compile_unit_di_node<'ll, 'tcx>(
 ) -> &'ll DIDescriptor {
     let mut name_in_debuginfo = tcx
         .sess
-        .local_crate_source_file()
+        .local_crate_source_file(RemapPathScopeComponents::DEBUGINFO)
         .unwrap_or_else(|| PathBuf::from(tcx.crate_name(LOCAL_CRATE).as_str()));
 
     // To avoid breaking split DWARF, we need to ensure that each codegen unit

compiler/rustc_passes/src/entry.rs

@@ -6,7 +6,7 @@ use rustc_hir::def_id::{DefId, LocalDefId, CRATE_DEF_ID, LOCAL_CRATE};
 use rustc_hir::{ItemId, Node, CRATE_HIR_ID};
 use rustc_middle::query::Providers;
 use rustc_middle::ty::TyCtxt;
-use rustc_session::config::{sigpipe, CrateType, EntryFnType};
+use rustc_session::config::{sigpipe, CrateType, EntryFnType, RemapPathScopeComponents};
 use rustc_session::parse::feature_err;
 use rustc_span::symbol::sym;
 use rustc_span::{Span, Symbol};
@@ -176,10 +176,13 @@ fn no_main_err(tcx: TyCtxt<'_>, visitor: &EntryContext<'_>) {
 
     // There is no main function.
     let mut has_filename = true;
-    let filename = tcx.sess.local_crate_source_file().unwrap_or_else(|| {
-        has_filename = false;
-        Default::default()
-    });
+    let filename = tcx
+        .sess
+        .local_crate_source_file(RemapPathScopeComponents::DIAGNOSTICS)
+        .unwrap_or_else(|| {
+            has_filename = false;
+            Default::default()
+        });
     let main_def_opt = tcx.resolutions(()).main_def;
     let code = E0601;
     let add_teach_note = tcx.sess.teach(code);

compiler/rustc_session/src/session.rs

@@ -250,10 +250,9 @@ impl Session {
         self.miri_unleashed_features.lock().push((span, feature_gate));
     }
 
-    pub fn local_crate_source_file(&self) -> Option<PathBuf> {
+    pub fn local_crate_source_file(&self, scope: RemapPathScopeComponents) -> Option<PathBuf> {
         let path = self.io.input.opt_path()?;
-        // FIXME: The remap path scope should probably not be hardcoded.
-        if self.should_prefer_remapped(RemapPathScopeComponents::DEBUGINFO) {
+        if self.should_prefer_remapped(scope) {
             Some(self.opts.file_path_mapping().map_prefix(path).0.into_owned())
         } else {
             Some(path.to_path_buf())

src/librustdoc/html/render/mod.rs

@@ -53,6 +53,7 @@ use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_hir::def_id::{DefId, DefIdSet};
 use rustc_hir::Mutability;
 use rustc_middle::ty::{self, TyCtxt};
+use rustc_session::config::RemapPathScopeComponents;
 use rustc_session::RustcVersion;
 use rustc_span::{
     symbol::{sym, Symbol},
@@ -2506,7 +2507,8 @@ fn render_call_locations<W: fmt::Write>(mut w: W, cx: &mut Context<'_>, item: &c
         // Look for the example file in the source map if it exists, otherwise return a dummy span
         let file_span = (|| {
             let source_map = tcx.sess.source_map();
-            let crate_src = tcx.sess.local_crate_source_file()?;
+            let crate_src =
+                tcx.sess.local_crate_source_file(RemapPathScopeComponents::DIAGNOSTICS)?;
             let abs_crate_src = crate_src.canonicalize().ok()?;
             let crate_root = abs_crate_src.parent()?.parent()?;
             let rel_path = path.strip_prefix(crate_root).ok()?;