src: split nacltest.bash into naclmake.bash and keep nacltest.bash

Needed by the build system to shard tests. nacl was the last unsharded
builder.

(I considered also adding a -make-only flag to nacltest.bash, but that
wouldn't fail fast when the file didn't exist.)

Updates #15242

Change-Id: I6afc1c1fe4268ab98c0724b5764c67d3784caebe
Reviewed-on: https://go-review.googlesource.com/21851Reviewed-by: Andrew Gerrand <adg@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/naclmake.bash

+#!/bin/bash
+# Copyright 2016 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+# naclmake.bash builds runs make.bash for nacl, but not does run any
+# tests. This is used by the continuous build.
+
+# Assumes that sel_ldr binaries and go_nacl_$GOARCH_exec scripts are in $PATH;
+# see ../misc/nacl/README.
+
+set -e
+ulimit -c 0
+
+# guess GOARCH if not set
+naclGOARCH=$GOARCH
+if [ -z "$naclGOARCH" ]; then
+	case "$(uname -m)" in
+	x86_64)
+		naclGOARCH=amd64p32
+		;;
+	armv7l) # NativeClient on ARM only supports ARMv7A.
+		naclGOARCH=arm
+		;;
+	i?86)
+		naclGOARCH=386
+		;;
+	esac
+fi
+
+unset GOOS GOARCH
+if [ ! -f make.bash ]; then
+	echo 'nacltest.bash must be run from $GOROOT/src' 1>&2
+	exit 1
+fi
+
+# the builder might have set GOROOT_FINAL.
+export GOROOT=$(pwd)/..
+
+# Build zip file embedded in package syscall.
+echo "##### Building fake file system zip for nacl"
+rm -f syscall/fstest_nacl.go
+GOROOT_BOOTSTRAP=${GOROOT_BOOTSTRAP:-$HOME/go1.4}
+gobin=$GOROOT_BOOTSTRAP/bin
+GOROOT=$GOROOT_BOOTSTRAP $gobin/go run ../misc/nacl/mkzip.go -p syscall -r .. ../misc/nacl/testzip.proto syscall/fstest_nacl.go
+
+# Run standard build and tests.
+GOOS=nacl GOARCH=$naclGOARCH ./make.bash

src/nacltest.bash

@@ -13,21 +13,7 @@
 set -e
 ulimit -c 0
 
-# guess GOARCH if not set
-naclGOARCH=$GOARCH
-if [ -z "$naclGOARCH" ]; then
-	case "$(uname -m)" in
-	x86_64)
-		naclGOARCH=amd64p32
-		;;
-	armv7l) # NativeClient on ARM only supports ARMv7A.
-		naclGOARCH=arm
-		;;
-	i?86)
-		naclGOARCH=386
-		;;
-	esac
-fi
+. ./naclmake.bash
 
 # Check GOARCH.
 case "$naclGOARCH" in
@@ -59,24 +45,8 @@ if ! which go_nacl_${naclGOARCH}_exec >/dev/null; then
 	exit 1
 fi
 
-unset GOOS GOARCH
-if [ ! -f make.bash ]; then
-	echo 'nacltest.bash must be run from $GOROOT/src' 1>&2
-	exit 1
-fi
-
-# the builder might have set GOROOT_FINAL.
-export GOROOT=$(pwd)/..
-
-# Build zip file embedded in package syscall.
-echo "##### Building fake file system zip for nacl"
-rm -f syscall/fstest_nacl.go
-GOROOT_BOOTSTRAP=${GOROOT_BOOTSTRAP:-$HOME/go1.4}
-gobin=$GOROOT_BOOTSTRAP/bin
-GOROOT=$GOROOT_BOOTSTRAP $gobin/go run ../misc/nacl/mkzip.go -p syscall -r .. ../misc/nacl/testzip.proto syscall/fstest_nacl.go
-
-# Run standard build and tests.
-export PATH=$(pwd)/../misc/nacl:$PATH
-GOOS=nacl GOARCH=$naclGOARCH ./all.bash
+export PATH=$(pwd)/../bin:$(pwd)/../misc/nacl:$PATH
+GOROOT=$(../bin/go env GOROOT)
+GOOS=nacl GOARCH=$naclGOARCH go tool dist test --no-rebuild
 
 rm -f syscall/fstest_nacl.go