make.bat,race.bat: simplify --dist-tool handling

make.bat accepts the --dist-tool flag on multiple flag positions
and also allows omitting the trailing dash. Doing so adds complexity
and is not aligned with the make.bash and make.rc behavior. Remove that
flexibility to simplify the code and make it more consistent. This also
fixes a bug where dist.exe wouldn't be removed from cmd\dist when
running make.bat --dist-tool.

Also, there is no need for race.bat to invoke make.bat with --dist-tool.
It uses it to get the GOHOSTARCH env value, but we can already get
that from the built-in PROCESSOR_ARCHITECTURE env variable.

Change-Id: Ia673562c1ae6aff9bd3ec7aa8cdd25ff187eeb79
Reviewed-on: https://go-review.googlesource.com/c/go/+/648615
Reviewed-by: Damien Neil <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>

Author: qmuntal

src/make.bat

@@ -101,14 +101,14 @@ call .\env.bat
 del env.bat
 if x%vflag==x-v echo.
 
-if x%1==x-dist-tool goto copydist
-if x%2==x-dist-tool goto copydist
-if x%3==x-dist-tool goto copydist
-if x%4==x-dist-tool goto copydist
-if x%1==x--dist-tool goto copydist
-if x%2==x--dist-tool goto copydist
-if x%3==x--dist-tool goto copydist
-if x%4==x--dist-tool goto copydist
+if x%1==x--dist-tool (
+	mkdir "%GOTOOLDIR%" 2>NUL
+	if not x%2==x (
+		copy cmd\dist\dist.exe "%2"
+	)
+	move cmd\dist\dist.exe "%GOTOOLDIR%\dist.exe"
+	goto :eof
+)
 
 :: Run dist bootstrap to complete make.bash.
 :: Bootstrap installs a proper cmd/dist, built with the new toolchain.
@@ -123,11 +123,6 @@ goto :eof
 :: to avoid needing three copies in three different shell languages
 :: (make.bash, make.bat, make.rc).
 
-:copydist
-mkdir "%GOTOOLDIR%" 2>NUL
-copy cmd\dist\dist.exe "%GOTOOLDIR%\"
-goto :eof
-
 :nogoenv
 set GO111MODULE=off
 set GOENV=off

src/race.bat

@@ -14,13 +14,7 @@ if not exist make.bat (
     exit /b 1
 )
 
-set GOROOT=%CD%\..
-call .\make.bat --dist-tool >NUL || exit /b 1
-.\cmd\dist\dist.exe env -w -p >env.bat || exit /b 1
-call .\env.bat
-del env.bat
-
-if not %GOHOSTARCH% == amd64 (
+if not "%PROCESSOR_ARCHITECTURE%"=="AMD64" (
     echo Race detector is only supported on windows/amd64.
     exit /b 1
 )