Stop using an Arc when setting the file text

Author: lnicola

crates/base-db/src/change.rs

@@ -13,7 +13,7 @@ use crate::{CrateGraph, SourceDatabaseExt, SourceDatabaseExt2, SourceRoot, Sourc
 #[derive(Default)]
 pub struct FileChange {
     pub roots: Option<Vec<SourceRoot>>,
-    pub files_changed: Vec<(FileId, Option<Arc<str>>)>,
+    pub files_changed: Vec<(FileId, Option<String>)>,
     pub crate_graph: Option<CrateGraph>,
 }
 
@@ -42,7 +42,7 @@ impl FileChange {
         self.roots = Some(roots);
     }
 
-    pub fn change_file(&mut self, file_id: FileId, new_text: Option<Arc<str>>) {
+    pub fn change_file(&mut self, file_id: FileId, new_text: Option<String>) {
         self.files_changed.push((file_id, new_text))
     }
 
@@ -68,7 +68,7 @@ impl FileChange {
             let source_root = db.source_root(source_root_id);
             let durability = durability(&source_root);
             // XXX: can't actually remove the file, just reset the text
-            let text = text.unwrap_or_else(|| Arc::from(""));
+            let text = text.as_ref().map(String::as_str).unwrap_or_else(|| "");
             db.set_file_text_with_durability(file_id, text, durability)
         }
         if let Some(crate_graph) = self.crate_graph {

crates/base-db/src/lib.rs

@@ -115,14 +115,14 @@ fn file_text(db: &dyn SourceDatabaseExt, file_id: FileId) -> Arc<str> {
 }
 
 pub trait SourceDatabaseExt2 {
-    fn set_file_text(&mut self, file_id: FileId, text: Arc<str>) {
+    fn set_file_text(&mut self, file_id: FileId, text: &str) {
         self.set_file_text_with_durability(file_id, text, Durability::LOW);
     }
 
     fn set_file_text_with_durability(
         &mut self,
         file_id: FileId,
-        text: Arc<str>,
+        text: &str,
         durability: Durability,
     );
 }
@@ -131,7 +131,7 @@ impl<Db: ?Sized + SourceDatabaseExt> SourceDatabaseExt2 for Db {
     fn set_file_text_with_durability(
         &mut self,
         file_id: FileId,
-        text: Arc<str>,
+        text: &str,
         durability: Durability,
     ) {
         let bytes = text.as_bytes();

crates/hir-def/src/nameres/tests/incremental.rs

@@ -1,6 +1,5 @@
 use base_db::{SourceDatabase, SourceDatabaseExt2 as _};
 use test_fixture::WithFixture;
-use triomphe::Arc;
 
 use crate::{db::DefDatabase, nameres::tests::TestDB, AdtId, ModuleDefId};
 
@@ -17,7 +16,7 @@ fn check_def_map_is_not_recomputed(ra_fixture_initial: &str, ra_fixture_change:
         });
         assert!(format!("{events:?}").contains("crate_def_map"), "{events:#?}")
     }
-    db.set_file_text(pos.file_id, Arc::from(ra_fixture_change));
+    db.set_file_text(pos.file_id, ra_fixture_change);
 
     {
         let events = db.log_executed(|| {
@@ -267,7 +266,7 @@ fn quux() { 92 }
 m!(Y);
 m!(Z);
 "#;
-    db.set_file_text(pos.file_id, Arc::from(new_text));
+    db.set_file_text(pos.file_id, new_text);
 
     {
         let events = db.log_executed(|| {

crates/hir-expand/src/change.rs

@@ -48,7 +48,7 @@ impl ChangeWithProcMacros {
         }
     }
 
-    pub fn change_file(&mut self, file_id: FileId, new_text: Option<Arc<str>>) {
+    pub fn change_file(&mut self, file_id: FileId, new_text: Option<String>) {
         self.source_change.change_file(file_id, new_text)
     }
 

crates/hir-ty/src/tests.rs

@@ -575,7 +575,7 @@ fn salsa_bug() {
         }
     ";
 
-    db.set_file_text(pos.file_id, Arc::from(new_text));
+    db.set_file_text(pos.file_id, new_text);
 
     let module = db.module_for_file(pos.file_id);
     let crate_def_map = module.def_map(&db);

crates/hir-ty/src/tests/incremental.rs

@@ -1,6 +1,5 @@
 use base_db::SourceDatabaseExt2 as _;
 use test_fixture::WithFixture;
-use triomphe::Arc;
 
 use crate::{db::HirDatabase, test_db::TestDB};
 
@@ -33,7 +32,7 @@ fn foo() -> i32 {
     1
 }";
 
-    db.set_file_text(pos.file_id, Arc::from(new_text));
+    db.set_file_text(pos.file_id, new_text);
 
     {
         let events = db.log_executed(|| {
@@ -85,7 +84,7 @@ fn baz() -> i32 {
 }
 ";
 
-    db.set_file_text(pos.file_id, Arc::from(new_text));
+    db.set_file_text(pos.file_id, new_text);
 
     {
         let events = db.log_executed(|| {

crates/ide/src/lib.rs

@@ -259,7 +259,7 @@ impl Analysis {
             false,
             CrateOrigin::Local { repo: None, name: None },
         );
-        change.change_file(file_id, Some(Arc::from(text)));
+        change.change_file(file_id, Some(text));
         change.set_crate_graph(crate_graph);
         change.set_target_data_layouts(vec![Err("fixture has no layout".into())]);
         change.set_toolchains(vec![None]);

crates/load-cargo/src/lib.rs

@@ -361,8 +361,8 @@ fn load_crate_graph(
     let changes = vfs.take_changes();
     for file in changes {
         if let vfs::Change::Create(v) | vfs::Change::Modify(v) = file.change {
-            if let Ok(text) = std::str::from_utf8(&v) {
-                analysis_change.change_file(file.file_id, Some(text.into()))
+            if let Ok(text) = String::from_utf8(v) {
+                analysis_change.change_file(file.file_id, Some(text))
             }
         }
     }

crates/rust-analyzer/src/cli/rustc_tests.rs

@@ -134,7 +134,7 @@ impl Tester {
         let should_have_no_error = text.contains("// check-pass")
             || text.contains("// build-pass")
             || text.contains("// run-pass");
-        change.change_file(self.root_file, Some(Arc::from(text)));
+        change.change_file(self.root_file, Some(text));
         self.host.apply_change(change);
         let diagnostic_config = DiagnosticsConfig::test_sample();
 

crates/rust-analyzer/src/global_state.rs

@@ -330,7 +330,7 @@ impl GlobalState {
                         // FIXME: Consider doing normalization in the `vfs` instead? That allows
                         // getting rid of some locking
                         let (text, line_endings) = LineEndings::normalize(text);
-                        (Arc::from(text), line_endings)
+                        (text, line_endings)
                     })
                 } else {
                     None