go-cross

#!/bin/bash

# go-cross [go binary] [version]
#
# go-cross builds the main package under the current directory for all the first
# class Go ports. The optional parameters configure which Go command to build
# with, and a version override.
#
# This script is meant to be simple. If you need more, copy and adapt it.

# Consistently turn cgo off, even for our local linux/amd64.
export CGO_ENABLED=0

# Since we use GOAMD64=v3 locally,
# turn that off for cross-builds for greater compatibility.
export GOAMD64=v1

gocmd=${1:-"go"}
version=${2:-"$(git describe --always --dirty --tags)"}
dir=$(basename "$PWD")

echo "Building version ${version} with $($gocmd version)"

while read goos goarch; do
	(
		export GOOS=$goos GOARCH=$goarch
		out="${dir}_${version}_${goos}_${goarch}$($gocmd env GOEXE)"
		$gocmd build -trimpath -ldflags="-w -s -X 'main.version=${version}'" -o="${out}"
		echo $out
	) &
done < <(
	# "dist list -json" gives us a list of all targets in JSON format.
	# Flatten the list, and only keep the first-class ports.
	# Then print the GOOS/GOARCH pairs in a way that shell can easily read.
	$gocmd tool dist list -json | jq -r '.[] | select(.FirstClass) | [.GOOS, .GOARCH] | @tsv'
)

wait