Reduce exposure of three functions used only within rustc_incremental.

Author: nnethercote

compiler/rustc_incremental/src/lib.rs

@@ -20,13 +20,10 @@ mod persist;
 
 use assert_dep_graph::assert_dep_graph;
 pub use persist::copy_cgu_workproduct_to_incr_comp_cache_dir;
-pub use persist::delete_workproduct_files;
 pub use persist::finalize_session_directory;
-pub use persist::garbage_collect_session_directories;
 pub use persist::in_incr_comp_dir;
 pub use persist::in_incr_comp_dir_sess;
 pub use persist::load_query_result_cache;
-pub use persist::prepare_session_directory;
 pub use persist::save_dep_graph;
 pub use persist::save_work_product_index;
 pub use persist::setup_dep_graph;

compiler/rustc_incremental/src/persist/fs.rs

@@ -202,7 +202,7 @@ pub fn in_incr_comp_dir(incr_comp_session_dir: &Path, file_name: &str) -> PathBu
 /// The garbage collection will take care of it.
 ///
 /// [`rustc_interface::queries::dep_graph`]: ../../rustc_interface/struct.Queries.html#structfield.dep_graph
-pub fn prepare_session_directory(
+pub(crate) fn prepare_session_directory(
     sess: &Session,
     crate_name: Symbol,
     stable_crate_id: StableCrateId,
@@ -621,7 +621,7 @@ fn is_old_enough_to_be_collected(timestamp: SystemTime) -> bool {
 }
 
 /// Runs garbage collection for the current session.
-pub fn garbage_collect_session_directories(sess: &Session) -> io::Result<()> {
+pub(crate) fn garbage_collect_session_directories(sess: &Session) -> io::Result<()> {
     debug!("garbage_collect_session_directories() - begin");
 
     let session_directory = sess.incr_comp_session_dir();

compiler/rustc_incremental/src/persist/mod.rs

@@ -11,14 +11,11 @@ mod save;
 mod work_product;
 
 pub use fs::finalize_session_directory;
-pub use fs::garbage_collect_session_directories;
 pub use fs::in_incr_comp_dir;
 pub use fs::in_incr_comp_dir_sess;
-pub use fs::prepare_session_directory;
 pub use load::load_query_result_cache;
 pub use load::setup_dep_graph;
 pub use load::LoadResult;
 pub use save::save_dep_graph;
 pub use save::save_work_product_index;
 pub use work_product::copy_cgu_workproduct_to_incr_comp_cache_dir;
-pub use work_product::delete_workproduct_files;

compiler/rustc_incremental/src/persist/work_product.rs

@@ -45,7 +45,7 @@ pub fn copy_cgu_workproduct_to_incr_comp_cache_dir(
 }
 
 /// Removes files for a given work product.
-pub fn delete_workproduct_files(sess: &Session, work_product: &WorkProduct) {
+pub(crate) fn delete_workproduct_files(sess: &Session, work_product: &WorkProduct) {
     for (_, path) in work_product.saved_files.items().into_sorted_stable_ord() {
         let path = in_incr_comp_dir_sess(sess, path);
         if let Err(err) = std_fs::remove_file(&path) {