*.bash: always use the same string equality operator

POSIX Shell only supports = to compare variables inside '[' tests. But
this is Bash, where == is an alias for =. In practice they're the same,
but the current form is inconsisnent and breaks POSIX for no good
reason.

Change-Id: I38fa7a5a90658dc51acc2acd143049e510424ed8
Reviewed-on: https://go-review.googlesource.com/38031Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

doc/articles/wiki/test.bash

@@ -20,7 +20,7 @@ trap cleanup 0 INT
 rm -f get.bin final-test.bin a.out
 
 # If called with -all, check that all code snippets compile.
-if [ "$1" == "-all" ]; then
+if [ "$1" = "-all" ]; then
 	for fn in *.go; do
 		go build -o a.out $fn
 	done

lib/time/update.bash

@@ -42,7 +42,7 @@ zip -0 -r ../../zoneinfo.zip *
 cd ../..
 
 echo
-if [ "$1" == "-work" ]; then 
+if [ "$1" = "-work" ]; then 
 	echo Left workspace behind in work/.
 else
 	rm -rf work

misc/cgo/fortran/test.bash

@@ -12,7 +12,7 @@ FC=$1
 goos=$(go env GOOS)
 
 libext="so"
-if [ "$goos" == "darwin" ]; then
+if [ "$goos" = "darwin" ]; then
 	libext="dylib"
 fi
 

misc/cgo/testcshared/test.bash

@@ -27,7 +27,7 @@ fi
 # Directory where cgo headers and outputs will be installed.
 # The installation directory format varies depending on the platform.
 installdir=pkg/${goos}_${goarch}_testcshared_shared
-if [ "${goos}" == "darwin" ]; then
+if [ "${goos}" = "darwin" ]; then
 	installdir=pkg/${goos}_${goarch}_testcshared
 fi
 
@@ -40,13 +40,13 @@ function cleanup() {
 	rm -f testp testp2 testp3 testp4 testp5
 	rm -rf pkg "${goroot}/${installdir}"
 
-	if [ "$goos" == "android" ]; then
+	if [ "$goos" = "android" ]; then
 		adb shell rm -rf "$androidpath"
 	fi
 }
 trap cleanup EXIT
 
-if [ "$goos" == "android" ]; then
+if [ "$goos" = "android" ]; then
 	adb shell mkdir -p "$androidpath"
 fi
 
@@ -69,7 +69,7 @@ function run() {
 
 function binpush() {
 	bin=${1}
-	if [ "$goos" == "android" ]; then
+	if [ "$goos" = "android" ]; then
 		adb push "$bin"  "${androidpath}/${bin}" 2>/dev/null
 	fi
 }
@@ -79,7 +79,7 @@ rm -rf pkg
 suffix="-installsuffix testcshared"
 
 libext="so"
-if [ "$goos" == "darwin" ]; then
+if [ "$goos" = "darwin" ]; then
 	libext="dylib"
 fi
 
@@ -89,7 +89,7 @@ GOPATH=$(pwd) go install -buildmode=c-shared $suffix libgo
 GOPATH=$(pwd) go build -buildmode=c-shared $suffix -o libgo.$libext src/libgo/libgo.go
 binpush libgo.$libext
 
-if [ "$goos" == "linux" ] || [ "$goos" == "android" ] ; then
+if [ "$goos" = "linux" ] || [ "$goos" = "android" ] ; then
     if readelf -d libgo.$libext | grep TEXTREL >/dev/null; then
         echo "libgo.$libext has TEXTREL set"
         exit 1
@@ -97,7 +97,7 @@ if [ "$goos" == "linux" ] || [ "$goos" == "android" ] ; then
 fi
 
 GOGCCFLAGS=$(go env GOGCCFLAGS)
-if [ "$goos" == "android" ]; then
+if [ "$goos" = "android" ]; then
 	GOGCCFLAGS="${GOGCCFLAGS} -pie"
 fi
 
@@ -127,7 +127,7 @@ fi
 GOPATH=$(pwd) go build -buildmode=c-shared $suffix -o libgo2.$libext libgo2
 binpush libgo2.$libext
 linkflags="-Wl,--no-as-needed"
-if [ "$goos" == "darwin" ]; then
+if [ "$goos" = "darwin" ]; then
 	linkflags=""
 fi
 $(go env CC) ${GOGCCFLAGS} -o testp2 main2.c $linkflags libgo2.$libext
@@ -139,7 +139,7 @@ if [ "$output" != "PASS" ]; then
 fi
 
 # test3: tests main.main is exported on android.
-if [ "$goos" == "android" ]; then
+if [ "$goos" = "android" ]; then
 	$(go env CC) ${GOGCCFLAGS} -o testp3 main3.c -ldl
 	binpush testp3
 	output=$(run ./testp ./libgo.so)

misc/cgo/testsanitizers/test.bash

@@ -72,7 +72,7 @@ testmsanshared() {
   goos=$(go env GOOS)
   suffix="-installsuffix testsanitizers"
   libext="so"
-  if [ "$goos" == "darwin" ]; then
+  if [ "$goos" = "darwin" ]; then
 	  libext="dylib"
   fi
   go build -msan -buildmode=c-shared $suffix -o ${TMPDIR}/libmsanshared.$libext msan_shared.go
@@ -135,7 +135,7 @@ testtsanshared() {
   goos=$(go env GOOS)
   suffix="-installsuffix tsan"
   libext="so"
-  if [ "$goos" == "darwin" ]; then
+  if [ "$goos" = "darwin" ]; then
 	  libext="dylib"
   fi
   go build -buildmode=c-shared $suffix -o ${TMPDIR}/libtsanshared.$libext tsan_shared.go

src/iostest.bash

@@ -24,11 +24,11 @@ if [ "$GOARCH" != "arm" ] && [ "$GOARCH" != "arm64" ]; then
 	echo "iostest.bash requires GOARCH=arm or GOARCH=arm64, got GOARCH=$GOARCH" 1>&2
 	exit 1
 fi
-if [ "$GOARCH" == "arm" ]; then
+if [ "$GOARCH" = "arm" ]; then
 	export GOARM=7
 fi
 
-if [ "$1" == "-restart" ]; then
+if [ "$1" = "-restart" ]; then
 	# Reboot to make sure previous runs do not interfere with the current run.
 	# It is reasonably easy for a bad program leave an iOS device in an
 	# almost unusable state.
@@ -60,7 +60,7 @@ GOOS=$GOHOSTOS GOARCH=$GOHOSTARCH go build \
 	-o ../bin/go_darwin_${GOARCH}_exec \
 	../misc/ios/go_darwin_arm_exec.go
 
-if [ "$GOIOS_DEV_ID" == "" ]; then
+if [ "$GOIOS_DEV_ID" = "" ]; then
 	echo "detecting iOS development identity"
 	eval $(GOOS=$GOHOSTOS GOARCH=$GOHOSTARCH go run ../misc/ios/detect.go)
 fi

src/make.bash

@@ -107,7 +107,7 @@ done
 # Test for debian/kFreeBSD.
 # cmd/dist will detect kFreeBSD as freebsd/$GOARCH, but we need to
 # disable cgo manually.
-if [ "$(uname -s)" == "GNU/kFreeBSD" ]; then
+if [ "$(uname -s)" = "GNU/kFreeBSD" ]; then
 	export CGO_ENABLED=0
 fi
 
@@ -125,7 +125,7 @@ if [ ! -x "$GOROOT_BOOTSTRAP/bin/go" ]; then
 	echo "Set \$GOROOT_BOOTSTRAP to a working Go tree >= Go 1.4." >&2
 	exit 1
 fi
-if [ "$GOROOT_BOOTSTRAP" == "$GOROOT" ]; then
+if [ "$GOROOT_BOOTSTRAP" = "$GOROOT" ]; then
 	echo "ERROR: \$GOROOT_BOOTSTRAP must not be set to \$GOROOT" >&2
 	echo "Set \$GOROOT_BOOTSTRAP to a working Go tree >= Go 1.4." >&2
 	exit 1

src/run.bash

@@ -36,12 +36,12 @@ ulimit -c 0
 # This is a system misconfiguration and should be fixed on the
 # broken system, not "fixed" by ignoring the failure here.
 # See longer discussion on golang.org/issue/7381. 
-[ "$(ulimit -H -n)" == "unlimited" ] || ulimit -S -n $(ulimit -H -n)
-[ "$(ulimit -H -d)" == "unlimited" ] || ulimit -S -d $(ulimit -H -d)
+[ "$(ulimit -H -n)" = "unlimited" ] || ulimit -S -n $(ulimit -H -n)
+[ "$(ulimit -H -d)" = "unlimited" ] || ulimit -S -d $(ulimit -H -d)
 
 # Thread count limit on NetBSD 7.
 if ulimit -T &> /dev/null; then
-	[ "$(ulimit -H -T)" == "unlimited" ] || ulimit -S -T $(ulimit -H -T)
+	[ "$(ulimit -H -T)" = "unlimited" ] || ulimit -S -T $(ulimit -H -T)
 fi
 
 exec go tool dist test -rebuild "$@"