rustbuild: Migrate tidy checks to Rust

This commit rewrites all of the tidy checks we have, namely:

* featureck
* errorck
* tidy
* binaries

into Rust under a new `tidy` tool inside of the `src/tools` directory. This at
the same time deletes all the corresponding Python tidy checks so we can be sure
to only have one source of truth for all the tidy checks.

cc #31590

mk/tests.mk

@@ -240,52 +240,16 @@ cleantestlibs:
 # Tidy
 ######################################################################
 
-ifdef CFG_NOTIDY
 .PHONY: tidy
-tidy:
-else
-
-# Run the tidy script in multiple parts to avoid huge 'echo' commands
-.PHONY: tidy
-tidy: tidy-basic tidy-binaries tidy-errors tidy-features
-
-endif
-
-.PHONY: tidy-basic
-tidy-basic:
-		@$(call E, check: formatting)
-		$(Q) $(CFG_PYTHON) $(S)src/etc/tidy.py $(S)src/
-
-.PHONY: tidy-binaries
-tidy-binaries:
-		@$(call E, check: binaries)
-		$(Q)find $(S)src -type f \
-		    \( -perm -u+x -or -perm -g+x -or -perm -o+x \) \
-		    -not -name '*.rs' -and -not -name '*.py' \
-		    -and -not -name '*.sh' -and -not -name '*.pp' \
-		| grep '^$(S)src/jemalloc' -v \
-		| grep '^$(S)src/libuv' -v \
-		| grep '^$(S)src/llvm' -v \
-		| grep '^$(S)src/rt/hoedown' -v \
-		| grep '^$(S)src/gyp' -v \
-		| grep '^$(S)src/etc' -v \
-		| grep '^$(S)src/doc' -v \
-		| grep '^$(S)src/compiler-rt' -v \
-		| grep '^$(S)src/libbacktrace' -v \
-		| grep '^$(S)src/rust-installer' -v \
-		| grep '^$(S)src/liblibc' -v \
-		| xargs $(CFG_PYTHON) $(S)src/etc/check-binaries.py
-
-.PHONY: tidy-errors
-tidy-errors:
-		@$(call E, check: extended errors)
-		$(Q) $(CFG_PYTHON) $(S)src/etc/errorck.py $(S)src/
-
-.PHONY: tidy-features
-tidy-features:
-		@$(call E, check: feature sanity)
-		$(Q) $(CFG_PYTHON) $(S)src/etc/featureck.py $(S)src/
-
+tidy: $(HBIN0_H_$(CFG_BUILD))/tidy$(X_$(CFG_BUILD))
+	$< $(S)src
+
+$(HBIN0_H_$(CFG_BUILD))/tidy$(X_$(CFG_BUILD)): \
+		$(TSREQ0_T_$(CFG_BUILD)_H_$(CFG_BUILD)) \
+		$(TLIB0_T_$(CFG_BUILD)_H_$(CFG_BUILD))/stamp.std \
+		$(call rwildcard,$(S)src/tools/tidy/src,*.rs)
+	$(STAGE0_T_$(CFG_BUILD)_H_$(CFG_BUILD)) src/tools/tidy/src/main.rs \
+		--out-dir $(@D) --crate-name tidy
 
 ######################################################################
 # Sets of tests

src/bootstrap/build/check.rs

@@ -33,3 +33,10 @@ pub fn cargotest(build: &Build, stage: u32, host: &str) {
               .env("PATH", newpath)
               .arg(&build.cargo));
 }
+
+pub fn tidy(build: &Build, stage: u32, host: &str) {
+    println!("tidy check stage{} ({})", stage, host);
+    let compiler = Compiler::new(stage, host);
+    build.run(build.tool_cmd(&compiler, "tidy")
+                   .arg(build.src.join("src")));
+}

src/bootstrap/build/mod.rs

@@ -197,6 +197,9 @@ impl Build {
                 ToolCargoTest { stage } => {
                     compile::tool(self, stage, target.target, "cargotest");
                 }
+                ToolTidy { stage } => {
+                    compile::tool(self, stage, target.target, "tidy");
+                }
                 DocBook { stage } => {
                     doc::rustbook(self, stage, target.target, "book", &doc_out);
                 }
@@ -230,6 +233,9 @@ impl Build {
                 CheckCargoTest { stage } => {
                     check::cargotest(self, stage, target.target);
                 }
+                CheckTidy { stage } => {
+                    check::tidy(self, stage, target.target);
+                }
 
                 DistDocs { stage } => dist::docs(self, stage, target.target),
                 DistMingw { _dummy } => dist::mingw(self, target.target),

src/bootstrap/build/step.rs

@@ -51,6 +51,7 @@ macro_rules! targets {
             (tool_rustbook, ToolRustbook { stage: u32 }),
             (tool_error_index, ToolErrorIndex { stage: u32 }),
             (tool_cargotest, ToolCargoTest { stage: u32 }),
+            (tool_tidy, ToolTidy { stage: u32 }),
 
             // Steps for long-running native builds. Ideally these wouldn't
             // actually exist and would be part of build scripts, but for now
@@ -79,6 +80,7 @@ macro_rules! targets {
             (check, Check { stage: u32, compiler: Compiler<'a> }),
             (check_linkcheck, CheckLinkcheck { stage: u32 }),
             (check_cargotest, CheckCargoTest { stage: u32 }),
+            (check_tidy, CheckTidy { stage: u32 }),
 
             // Distribution targets, creating tarballs
             (dist, Dist { stage: u32 }),
@@ -316,8 +318,13 @@ impl<'a> Step<'a> {
             Source::CheckCargoTest { stage } => {
                 vec![self.tool_cargotest(stage)]
             }
+            Source::CheckTidy { stage } => {
+                vec![self.tool_tidy(stage)]
+            }
 
-            Source::ToolLinkchecker { stage } => {
+            Source::ToolLinkchecker { stage } |
+            Source::ToolTidy { stage } |
+            Source::ToolCargoTest { stage } => {
                 vec![self.libstd(self.compiler(stage))]
             }
             Source::ToolErrorIndex { stage } |

src/bootstrap/mk/Makefile.in

@@ -42,5 +42,7 @@ check-cargotest:
 	$(Q)$(BOOTSTRAP) --step check-cargotest
 dist:
 	$(Q)$(BOOTSTRAP) --step dist
+tidy:
+	$(Q)$(BOOTSTRAP) --step check-tidy --stage 0
 
 .PHONY: dist