Add crossbuild script

Signed-off-by: Julius Volz <[email protected]>

crossbuild.sh

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+
+set -e
+set -u
+
+platforms=(
+	"linux/amd64"
+	"linux/386"
+	"darwin/amd64"
+	"windows/amd64"
+	"windows/386"
+	"freebsd/amd64"
+	"freebsd/386"
+	"openbsd/amd64"
+	"openbsd/386"
+	"netbsd/amd64"
+	"netbsd/386"
+	"dragonfly/amd64"
+	"linux/arm"
+	"linux/arm64"
+	"freebsd/arm"
+	"openbsd/arm"
+	"linux/mips64"
+	"linux/mips64le"
+	"netbsd/arm"
+	"linux/ppc64"
+	"linux/ppc64le"
+	"linux/s390x"
+)
+
+for platform in "${platforms[@]}"
+do
+    platform_split=(${platform//\// })
+    GOOS=${platform_split[0]}
+    GOARCH=${platform_split[1]}
+    output_name="prometheus_demo_service-$(git describe --tags).${GOOS}-${GOARCH}"
+    if [ $GOOS = "windows" ]; then
+        output_name+='.exe'
+    fi
+
+    echo "Building ${output_name}..."
+    env GOOS=$GOOS GOARCH=$GOARCH go build -o "${output_name}"
+done