build

#!/usr/bin/env bash
# build - builds for the current OS and ARCH
# build all - builds entire matrix

cd $( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )

get_commit() {
  COMMIT=$(git rev-parse --verify --short HEAD)
  RETURN_CODE=$?
  export COMMIT
  return $RETURN_CODE
}

get_version() {
  # Version will be the most recent tag + "-dev" if working tree is dirty
  # e.g.: "1.0.1"" or "1.0.1-dev"
  VERSION=$(git describe --tags --dirty='-dev' 2> /dev/null)
  export VERSION
  return 0
}

build() {
  # Detect the current OS and ARCH if not specified
  [ -z "$1" ] && local GOOS=$(uname -s | tr '[:upper:]' '[:lower:]') || local GOOS=$1
  [ -z "$2" ] && local GOARCH=$([ $(getconf LONG_BIT) == 64 ] && echo amd64 || echo 386) || local GOARCH=$2
  [ "$GOOS" == "windows" ] && local FILE_EXT=".exe" || local FILE_EXT=""
  local BINARY="dvm-helper-${GOOS}-${GOARCH}${FILE_EXT}"

  GOOS=$GOOS GOARCH=$GOARCH go build -ldflags "${LDFLAGS}" -o bin/$BINARY
  $(cd bin && shasum -a 256 $BINARY > $BINARY.sha256)
}

# Remove previously downloaded dvm-helper binaries
if [ -e 'dvm-helper' ]; then
  rm dvm-helper
fi
if [ -e 'dvm-helper.exe' ]; then
  rm dvm-helper.exe
fi

# Use information about git repo to set the binary version and commit
get_commit
get_version

LDFLAGS="-X main.dvmCommit=${COMMIT} \
         -X main.dvmVersion=${VERSION}"

# Build ALL THE THINGS!
if [ "$1" != "all" ]; then
  build
else
  build windows amd64
  build windows 386
  build darwin amd64
  build darwin 386
  build linux amd64
  build linux 386
fi