Auto merge of #50468 - nrc:test-rustfmt, r=alexcrichton

Pass a test directory to rustfmt

Another attempt to fix the rustfmt tests. `RUSTFMT_TEST_DIR` is consumed by Rustfmt in the latext commit (thus the Rustfmt update) because we need a place to create temp files that won't be read-only.

r? @alexcrichton

2 files changed, 8 insertions, 5 deletions

diff --git a/src/bootstrap/test.rs b/src/bootstrap/test.rs
index cbb952bab61..2865801742f 100644
--- a/src/bootstrap/test.rs
+++ b/src/bootstrap/test.rs
@@ -313,6 +313,9 @@ impl Step for Rustfmt {
 
         // Don't build tests dynamically, just a pain to work with
         cargo.env("RUSTC_NO_PREFER_DYNAMIC", "1");
+        let dir = testdir(builder, compiler.host);
+        t!(fs::create_dir_all(&dir));
+        cargo.env("RUSTFMT_TEST_DIR", dir);
 
         builder.add_rustc_lib_path(compiler, &mut cargo);
 
diff --git a/src/tools/rustfmt b/src/tools/rustfmt
-Subproject b6cd17f28ae314f2484ff05d3ce57652d51c5e8
+Subproject 0f8029f251b569a010cb5cfc5a8bff8bf3c949a