#!/usr/bin/env bash
set -e

# WARN: non hermetic build (people must run this script inside docker to
# produce deterministic binaries).

# Get the version from the environment, or try to figure it out.
if [ -z $VERSION ]; then
	VERSION=$(awk -F\" 'TMCoreSemVer =/ { print $2; exit }' < version/version.go)
fi
if [ -z "$VERSION" ]; then
    echo "Please specify a version."
    exit 1
fi
echo "==> Building version $VERSION..."

# Delete the old dir
echo "==> Removing old directory..."
rm -rf build/pkg
mkdir -p build/pkg

# Get the git commit
VERSION := "$(shell git describe --always)"
GIT_IMPORT="github.com/tendermint/tendermint/version"

# Determine the arch/os combos we're building for
XC_ARCH=${XC_ARCH:-"386 amd64 arm"}
XC_OS=${XC_OS:-"solaris darwin freebsd linux windows"}
XC_EXCLUDE=${XC_EXCLUDE:-" darwin/arm solaris/amd64 solaris/386 solaris/arm freebsd/amd64 windows/arm "}

# Make sure build tools are available.
make tools

# Build!
# ldflags: -s Omit the symbol table and debug information.
#	         -w Omit the DWARF symbol table.
echo "==> Building..."
IFS=' ' read -ra arch_list <<< "$XC_ARCH"
IFS=' ' read -ra os_list <<< "$XC_OS"
for arch in "${arch_list[@]}"; do
	for os in "${os_list[@]}"; do
		if [[ "$XC_EXCLUDE" !=  *" $os/$arch "* ]]; then
			echo "--> $os/$arch"
			GOOS=${os} GOARCH=${arch} go build -ldflags "-s -w -X ${GIT_IMPORT}.TMCoreSemVer=${VERSION}" -tags="${BUILD_TAGS}" -o "build/pkg/${os}_${arch}/tendermint" ./cmd/tendermint
		fi
	done
done

# Zip all the files.
echo "==> Packaging..."
for PLATFORM in $(find ./build/pkg -mindepth 1 -maxdepth 1 -type d); do
	OSARCH=$(basename "${PLATFORM}")
	echo "--> ${OSARCH}"

	pushd "$PLATFORM" >/dev/null 2>&1
	zip "../${OSARCH}.zip" ./*
	popd >/dev/null 2>&1
done

# Add "tendermint" and $VERSION prefix to package name.
rm -rf ./build/dist
mkdir -p ./build/dist
for FILENAME in $(find ./build/pkg -mindepth 1 -maxdepth 1 -type f); do
  FILENAME=$(basename "$FILENAME")
	cp "./build/pkg/${FILENAME}" "./build/dist/tendermint_${VERSION}_${FILENAME}"
done

# Make the checksums.
pushd ./build/dist
shasum -a256 ./* > "./tendermint_${VERSION}_SHA256SUMS"
popd

# Done
echo
echo "==> Results:"
ls -hl ./build/dist

exit 0
