Made temps-dir an unstable option.

compiler/rustc_driver/src/lib.rs

@@ -215,7 +215,6 @@ fn run_compiler(
 
     let cfg = interface::parse_cfgspecs(matches.opt_strs("cfg"));
     let (odir, ofile) = make_output(&matches);
-    let temps_dir = make_temps_dir(&matches);
     let mut config = interface::Config {
         opts: sopts,
         crate_cfg: cfg,
@@ -223,7 +222,6 @@ fn run_compiler(
         input_path: None,
         output_file: ofile,
         output_dir: odir,
-        temps_dir,
         file_loader,
         diagnostic_output,
         stderr: None,
@@ -458,11 +456,6 @@ fn make_output(matches: &getopts::Matches) -> (Option<PathBuf>, Option<PathBuf>)
     (odir, ofile)
 }
 
-// Extract temporary directory from matches.
-fn make_temps_dir(matches: &getopts::Matches) -> Option<PathBuf> {
-    matches.opt_str("temps-dir").map(|o| PathBuf::from(&o))
-}
-
 // Extract input (string or file and optional path) from matches.
 fn make_input(
     error_format: ErrorOutputType,

compiler/rustc_interface/src/interface.rs

@@ -143,7 +143,6 @@ pub struct Config {
     pub input_path: Option<PathBuf>,
     pub output_dir: Option<PathBuf>,
     pub output_file: Option<PathBuf>,
-    pub temps_dir: Option<PathBuf>,
     pub file_loader: Option<Box<dyn FileLoader + Send + Sync>>,
     pub diagnostic_output: DiagnosticOutput,
 
@@ -198,6 +197,8 @@ pub fn create_compiler_and_run<R>(config: Config, f: impl FnOnce(&Compiler) -> R
         );
     }
 
+    let temps_dir = sess.opts.debugging_opts.temps_dir.as_ref().map(|o| PathBuf::from(&o));
+
     let compiler = Compiler {
         sess,
         codegen_backend,
@@ -205,7 +206,7 @@ pub fn create_compiler_and_run<R>(config: Config, f: impl FnOnce(&Compiler) -> R
         input_path: config.input_path,
         output_dir: config.output_dir,
         output_file: config.output_file,
-        temps_dir: config.temps_dir,
+        temps_dir,
         register_lints: config.register_lints,
         override_queries: config.override_queries,
     };

compiler/rustc_interface/src/tests.rs

@@ -685,6 +685,7 @@ fn test_debugging_options_tracking_hash() {
     untracked!(span_debug, true);
     untracked!(span_free_formats, true);
     untracked!(strip, Strip::Debuginfo);
+    untracked!(temps_dir, Some(String::from("abc")));
     untracked!(terminal_width, Some(80));
     untracked!(threads, 99);
     untracked!(time, true);

compiler/rustc_session/src/config.rs

@@ -1110,7 +1110,6 @@ pub fn rustc_short_optgroups() -> Vec<RustcOptGroup> {
              in <dir>",
             "DIR",
         ),
-        opt::opt_s("", "temps-dir", "Write temporary output files to <dir>", "DIR"),
         opt::opt_s(
             "",
             "explain",

compiler/rustc_session/src/options.rs

@@ -1331,6 +1331,8 @@ options! {
         "which mangling version to use for symbol names ('legacy' (default) or 'v0')"),
     teach: bool = (false, parse_bool, [TRACKED],
         "show extended diagnostic help (default: no)"),
+    temps_dir: Option<String> = (None, parse_opt_string, [UNTRACKED],
+        "the directory the intermediate files are written to"),
     terminal_width: Option<usize> = (None, parse_opt_number, [UNTRACKED],
         "set the current terminal width"),
     tune_cpu: Option<String> = (None, parse_opt_string, [TRACKED],

src/doc/rustc/src/command-line-arguments.md

@@ -194,15 +194,6 @@ This flag controls the output filename.
 The outputted crate will be written to this directory. This flag is ignored if
 the [`-o` flag](#option-o-output) is used.
 
-<a id="option-temps-dir"></a>
-## `--temps-dir`: directory to write the intermediate files in
-
-Intermediate files will be written to this directory. If not set, the output
-directory is used. This option is useful if you are running more than one
-instance of `rustc` (e.g. with different `--crate-type` settings), and you
-need to make sure they are not overwriting each other's intermediate files.
-No files are kept unless `-C save-temps=yes` is also set.
-
 <a id="option-explain"></a>
 ## `--explain`: provide a detailed explanation of an error message
 

src/doc/unstable-book/src/compiler-flags/temps-dir.md

@@ -0,0 +1,10 @@
+# `temps-dir`
+
+--------------------
+
+The `-Ztemps-dir` compiler flag specifies the directory to write the
+intermediate files in. If not set, the output directory is used. This option is
+useful if you are running more than one instance of `rustc` (e.g. with different
+`--crate-type` settings), and you need to make sure they are not overwriting
+each other's intermediate files. No files are kept unless `-C save-temps=yes` is
+also set.

src/librustdoc/core.rs

@@ -259,7 +259,6 @@ crate fn create_config(
         input_path: cpath,
         output_file: None,
         output_dir: None,
-        temps_dir: None,
         file_loader: None,
         diagnostic_output: DiagnosticOutput::Default,
         stderr: None,

src/librustdoc/doctest.rs

@@ -94,7 +94,6 @@ crate fn run(options: Options) -> Result<(), ErrorReported> {
         input_path: None,
         output_file: None,
         output_dir: None,
-        temps_dir: None,
         file_loader: None,
         diagnostic_output: DiagnosticOutput::Default,
         stderr: None,

src/test/run-make-fulldeps/issue-19371/foo.rs

@@ -53,7 +53,6 @@ fn compile(code: String, output: PathBuf, sysroot: PathBuf) {
         input_path: None,
         output_file: Some(output),
         output_dir: None,
-        temps_dir: None,
         file_loader: None,
         diagnostic_output: DiagnosticOutput::Default,
         stderr: None,

src/test/run-make/issue-10971-temps-dir/Makefile

@@ -6,5 +6,5 @@ include ../../run-make-fulldeps/tools.mk
 all:
 	touch $(TMPDIR)/lib.rs
 
-	$(RUSTC) --crate-type=lib --temps-dir=$(TMPDIR)/temp1 $(TMPDIR)/lib.rs & \
+	$(RUSTC) --crate-type=lib -Z temps-dir=$(TMPDIR)/temp1 $(TMPDIR)/lib.rs & \
-	$(RUSTC) --crate-type=cdylib --temps-dir=$(TMPDIR)/temp2 $(TMPDIR)/lib.rs
+	$(RUSTC) --crate-type=cdylib -Z temps-dir=$(TMPDIR)/temp2 $(TMPDIR)/lib.rs