#!/bin/bash
#
# This script builds the application from source for multiple platforms.
set -e

# Get the parent directory of where this script is.
SOURCE="${BASH_SOURCE[0]}"
while [ -h "$SOURCE" ] ; do SOURCE="$(readlink "$SOURCE")"; done
DIR="$( cd -P "$( dirname "$SOURCE" )/.." && pwd )"

# Change into that directory
cd $DIR

# Get the git commit
GIT_COMMIT=$(git rev-parse HEAD)
GIT_DIRTY=$(test -n "`git status --porcelain`" && echo "+CHANGES" || true)

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

# If we're building on Windows, specify an extension
EXTENSION=""
if [ "$(go env GOOS)" = "windows" ]; then
    EXTENSION=".exe"
fi

GOPATHSINGLE=${GOPATH%%:*}
if [ "$(go env GOOS)" = "windows" ]; then
    GOPATHSINGLE=${GOPATH%%;*}
fi

# Install dependencies
echo "==> Getting dependencies..."
go get ./...

# Delete the old dir
echo "==> Removing old directory..."
rm -f bin/*
rm -rf pkg/*

# Build!
echo "==> Building..."
gox \
    -os="${XC_OS}" \
    -arch="${XC_ARCH}" \
    -ldflags "-X main.GitCommit ${GIT_COMMIT}${GIT_DIRTY}" \
    -output "pkg/{{.OS}}_{{.Arch}}/terraform-{{.Dir}}" \
    ./...

# Make sure "terraform-terraform" is renamed properly
for PLATFORM in $(find ./pkg -mindepth 1 -maxdepth 1 -type d); do
    mv ${PLATFORM}/terraform-terraform${EXTENSION} ${PLATFORM}/terraform${EXTENSION}
done

# Copy our OS/Arch to the bin/ directory
DEV_PLATFORM="./pkg/$(go env GOOS)_$(go env GOARCH)"
for F in $(find ${DEV_PLATFORM} -mindepth 1 -maxdepth 1 -type f); do
    cp ${F} bin/
done

if [ "${TF_DEV}x" = "x" ]; then
    # Zip and copy to the dist dir
    echo "==> Packaging..."
    for PLATFORM in $(find ./pkg -mindepth 1 -maxdepth 1 -type d); do
        OSARCH=$(basename ${PLATFORM})
        echo "--> ${OSARCH}"

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

# Done!
echo
echo "==> Results:"
ls -hl bin/