gogo-release

#!/bin/sh
#
# https://github.com/arp242/gogo-release

set -euC

# Valid combinations: https://golang.org/doc/install/source#environment
# Everything from the third argument on are set as env vars; for example:
#   linux amd64 CC=foo CXX=bar
matrix="
linux amd64
linux 386
linux arm64
windows amd64
"

# Program to run on the binary after build, usually to compress it. "upx -qqq"
# is recommended for servers and other programs where an extra ~200ms of startup
# time isn't a big deal. It's not recommended for CLI apps and the like.
#
# gzip -f can be used to just compress the uploaded file.
#post_build="upx -qqq"
post_build=""

# Location to put the binaries.
tmp=./dist
mkdir -p "$tmp"

# Project name.
name=$(basename "$(go list)")

# Get the version from commandline or git tag.
tag=${1:-}
if [ -z "$tag" ]; then
    commit=$(git log -n1 --format='%H' | head -c10)
    tag=$(git tag -l --points-at "$commit")
    if [ -z "$tag" ]; then
        tag=$commit
        # echo >&2 "Need to have a tag on the current commit or give the version as the first argument (i.e. ${0} v1.0.0)"
        # exit 1
    fi
fi

# Flags to pass to "go build"; you can add a package name or build tags here;
# for example in your local .gogo-release you can append to it like so:
#   build_flags="$build_flags -tags mytag ./cmd/myapp"
build_flags="-trimpath -ldflags='-w -s -X main.version=$tag'"

# Disable cgo by default to create static binaries; re-enable in local
# .gogo-release if you don't want this.
export CGO_ENABLED=0

# Pick up configuration to override any of the above.
[ -f "./.gogo-release" ] && . ./.gogo-release

# Compile
IFS="
"
for arch in $matrix; do
    (
        export GOOS=${arch%% *}
        export GOARCH=${arch#* }
        env=${GOARCH#* }
        export GOARCH=${GOARCH%% *}
        [ "$env" != "$GOARCH" ] && IFS=" " && for e in $env; do export "$e"; done

        # out="$tmp/$name-$tag-$GOOS-$GOARCH"
        out="$tmp/$name-$GOOS-$GOARCH"
        [ "$GOOS" = "windows" ] && out="$out.exe"
        echo "=== BUILDING $out ==="

        eval "time go build -o $out $build_flags"
        if [ -n "${post_build:-}" ]; then
            printf '\r%60s\rCompressing %s' ' ' "$out"
            eval time $post_build "$out" || :
        fi
    )
done

echo
type gogo_before_exit >/dev/null 2>&1 && gogo_before_exit

exit 0