add shallow_find_files helper function to run-make-support

Author: Oneirical

src/tools/run-make-support/src/lib.rs

@@ -247,6 +247,40 @@ pub fn test_while_readonly<P: AsRef<Path>, F: FnOnce() + std::panic::UnwindSafe>
     success.unwrap();
 }
 
+/// Browse the directory `path` non-recursively and return all files which respect the parameters
+/// outlined by `closure`.
+#[track_caller]
+pub fn shallow_find_files<P: AsRef<Path>, F: Fn(&PathBuf) -> bool>(
+    path: P,
+    closure: F,
+) -> Vec<PathBuf> {
+    let mut matching_files = Vec::new();
+    for entry in fs_wrapper::read_dir(path) {
+        let entry = entry.expect("failed to read directory entry.");
+        let path = entry.path();
+
+        if path.is_file() && closure(&path) {
+            matching_files.push(path);
+        }
+    }
+    matching_files
+}
+
+/// Returns true if the filename at `path` starts with `prefix`.
+pub fn has_prefix<P: AsRef<Path>>(path: P, prefix: &str) -> bool {
+    path.as_ref().file_name().is_some_and(|name| name.to_str().unwrap().starts_with(prefix))
+}
+
+/// Returns true if the filename at `path` has the extension `extension`.
+pub fn has_extension<P: AsRef<Path>>(path: P, extension: &str) -> bool {
+    path.as_ref().extension().is_some_and(|ext| ext == extension)
+}
+
+/// Returns true if the filename at `path` does not contain `expected`.
+pub fn not_contains<P: AsRef<Path>>(path: P, expected: &str) -> bool {
+    !path.as_ref().file_name().is_some_and(|name| name.to_str().unwrap().contains(expected))
+}
+
 /// Use `cygpath -w` on a path to get a Windows path string back. This assumes that `cygpath` is
 /// available on the platform!
 #[track_caller]

tests/run-make/optimization-remarks-dir-pgo/rmake.rs

@@ -7,16 +7,20 @@
 //@ needs-profiler-support
 //@ ignore-cross-compile
 
-use run_make_support::{invalid_utf8_contains, llvm_profdata, run, rustc};
+use run_make_support::{
+    has_extension, has_prefix, invalid_utf8_contains, llvm_profdata, run, rustc, shallow_find_files,
+};
 
 fn main() {
     rustc().profile_generate("profdata").opt().input("foo.rs").output("foo").run();
     run("foo");
-    llvm_profdata()
-        .merge()
-        .output("merged.profdata")
-        .input("profdata/default_15907418011457399462_0.profraw")
-        .run();
+    // The profdata filename is a long sequence of numbers, fetch it by prefix and extension
+    // to keep the test working even if the filename changes.
+    let profdata_files = shallow_find_files("profdata", |path| {
+        has_prefix(path, "default") && has_extension(path, "profraw")
+    });
+    let profdata_file = profdata_files.get(0).unwrap();
+    llvm_profdata().merge().output("merged.profdata").input(profdata_file).run();
     rustc()
         .profile_use("merged.profdata")
         .opt()
@@ -25,5 +29,13 @@ fn main() {
         .arg("-Zremark-dir=profiles")
         .run();
     // Check that PGO hotness is included in the remark files
-    invalid_utf8_contains("profiles/foo.cba44757bc0621b9-cgu.0.opt.opt.yaml", "Hotness");
+    let remark_files = shallow_find_files("profiles", |path| {
+        has_prefix(path, "foo") && has_extension(path, "yaml")
+    });
+    assert!(!remark_files.is_empty());
+    for file in remark_files {
+        if !file.to_str().unwrap().contains("codegen") {
+            invalid_utf8_contains(file, "Hotness")
+        };
+    }
 }

tests/run-make/optimization-remarks-dir/rmake.rs

@@ -4,7 +4,10 @@
 // (should not have the `inline` mention).
 // See https://github.com/rust-lang/rust/pull/113040
 
-use run_make_support::{invalid_utf8_contains, invalid_utf8_not_contains, rustc};
+use run_make_support::{
+    has_extension, has_prefix, invalid_utf8_contains, invalid_utf8_not_contains, not_contains,
+    rustc, shallow_find_files,
+};
 
 fn main() {
     rustc()
@@ -14,13 +17,23 @@ fn main() {
         .arg("-Cremark=all")
         .arg("-Zremark-dir=profiles_all")
         .run();
-    invalid_utf8_contains("profiles_all/foo.5be5606e1f6aa79b-cgu.0.opt.opt.yaml", "inline");
+    let all_remark_files = shallow_find_files("profiles_all", |path| {
+        has_prefix(path, "foo") && has_extension(path, "yaml") && not_contains(path, "codegen")
+    });
+    for file in all_remark_files {
+        invalid_utf8_contains(file, "inline")
+    }
     rustc()
         .opt()
         .input("foo.rs")
         .crate_type("lib")
         .arg("-Cremark=foo")
         .arg("-Zremark-dir=profiles_foo")
         .run();
-    invalid_utf8_not_contains("profiles_foo/foo.5be5606e1f6aa79b-cgu.0.opt.opt.yaml", "inline");
+    let foo_remark_files = shallow_find_files("profiles_foo", |path| {
+        has_prefix(path, "foo") && has_extension(path, "yaml")
+    });
+    for file in foo_remark_files {
+        invalid_utf8_not_contains(file, "inline")
+    }
 }