chore: add extra AMD64-level target

See also:

golang/go#45453

https://en.wikipedia.org/wiki/X86-64#Microarchitecture_levels

https://developers.redhat.com/blog/2021/01/05/building-red-hat-enterprise-linux-9-for-the-x86-64-v2-microarchitecture-level#background_of_the_x86_64_microarchitecture_levels

Author: marjune163

build/build-all.inc.sh

@@ -1,5 +1,5 @@
-builds=('linux 386' 'linux amd64' 'linux arm' 'linux arm64' 'linux riscv64' 'linux loong64')
-builds=("${builds[@]}" 'windows 386' 'windows amd64' 'windows arm' 'windows arm64')
+builds=('linux 386' 'linux amd64' 'linux amd64,v2' 'linux amd64,v3' 'linux arm' 'linux arm64' 'linux riscv64' 'linux loong64')
+builds=("${builds[@]}" 'windows 386' 'windows amd64' 'windows amd64,v2' 'windows amd64,v3' 'windows arm' 'windows arm64')
 builds=("${builds[@]}" 'darwin amd64' 'darwin arm64')
 builds=("${builds[@]}" 'freebsd 386' 'freebsd amd64' 'freebsd arm' 'freebsd arm64')
 builds=("${builds[@]}" 'openbsd 386' 'openbsd amd64' 'openbsd arm' 'openbsd arm64')

build/build-current.sh

@@ -3,4 +3,10 @@
 cd $(dirname "$0")
 rm -rf ../output/
 
-bash ./build.sh "$(go env GOOS) $(go env GOARCH)"
+GOARCH=$(go env GOARCH)
+ARCH_OPT_NAME=$(echo "GO$GOARCH" | tr 'a-z' 'A-Z')
+if [ -n "${!ARCH_OPT_NAME}" ]; then
+	ARCH_OPT=",${!ARCH_OPT_NAME}"
+fi
+
+bash ./build.sh "$(go env GOOS) ${GOARCH}${ARCH_OPT}"

build/build-docker-image-dockerfile

@@ -3,7 +3,7 @@ ENV GO111MODULE=auto
 COPY .git/ /mnt/ghfs/.git/
 COPY src/ /mnt/ghfs/src/
 COPY build/ /mnt/ghfs/build/
-RUN ["/bin/bash", "-c", "cd /mnt/ghfs/build/; source ./build.inc.sh; go build -ldflags \"$LDFLAGS\" -o /tmp/ghfs /mnt/ghfs/src/main.go"]
+RUN ["/bin/bash", "-c", "cd /mnt/ghfs/build/; source ./build.inc.sh; go build -ldflags \"$(getLdFlags)\" -o /tmp/ghfs /mnt/ghfs/src/main.go"]
 RUN mkdir -p /output/usr/local/bin/; cp /tmp/ghfs /output/usr/local/bin/;
 COPY conf/docker-image/ /output/
 

build/build.inc.sh

@@ -3,5 +3,7 @@ OUTDIR='../output'
 MAINNAME='ghfs'
 MOD=$(go list ../src/)
 source ./build.inc.version.sh
-LDFLAGS="-s -w -X $MOD/version.appVer=$VERSION"
 LICENSE='../LICENSE'
+getLdFlags() {
+	echo "-s -w -X $MOD/version.appVer=$VERSION -X $MOD/version.appArch=${ARCH:-$(go env GOARCH)}"
+}

build/build.sh

@@ -10,14 +10,23 @@ mkdir -p "$OUTDIR"
 for build in "$@"; do
 	arg=($build)
 	export GOOS="${arg[0]}"
-	export GOARCH="${arg[1]}"
+	ARCH="${arg[1]}"	# e.g. "amd64" or "amd64,v2"
+	GOARCH=${ARCH%,*}
+	if [ "$ARCH" != "$GOARCH" ]; then
+		# e.g. "GOAMD64=v2"
+		ARCH_OPT="${ARCH#*,}"
+		declare -x $(echo GO$GOARCH | tr 'a-z' 'A-Z')="$ARCH_OPT"
+	else
+		ARCH_OPT=''
+		unset $(echo "GO$GOARCH" | tr 'a-z' 'A-Z')
+	fi
 	OS_SUFFIX="${arg[2]}"
 
 	BIN="$TMP/$MAINNAME$(go env GOEXE)"
 	rm -f "$BIN"
-	echo "Building: $GOOS$OS_SUFFIX $GOARCH"
-	go build -ldflags "$LDFLAGS" -o "$BIN" ../src/main.go
+	echo "Building: $GOOS$OS_SUFFIX $ARCH"
+	go build -ldflags "$(getLdFlags)" -o "$BIN" ../src/main.go
 
-	OUT="$OUTDIR/$MAINNAME-$VERSION-$GOOS$OS_SUFFIX-$GOARCH".zip
+	OUT="$OUTDIR/$MAINNAME-$VERSION-$GOOS$OS_SUFFIX-$GOARCH$ARCH_OPT".zip
 	zip -j "$OUT" "$BIN" "$LICENSE"
 done

src/version/main.go

@@ -5,14 +5,15 @@ import (
 	"runtime"
 )
 
-var appVer = "dev"
-
 const entryFormat = "%-8s %s\n"
 
+var appVer = "dev"
+var appArch = runtime.GOARCH
+
 func PrintVersion() {
 	fmt.Println("GHFS: Go HTTP File Server")
 	fmt.Printf(entryFormat, "Version:", appVer)
 	fmt.Printf(entryFormat, "SDK:", runtime.Version())
 	fmt.Printf(entryFormat, "OS:", runtime.GOOS)
-	fmt.Printf(entryFormat, "ARCH:", runtime.GOARCH)
+	fmt.Printf(entryFormat, "ARCH:", appArch)
 }