#!/bin/bash

# get build data
if [[ "$BUILD_COMMIT" == "" ]]; then
  BUILD_COMMIT=$(git describe --all --long --abbrev=99 --dirty 2>/dev/null)
fi
if [[ "$BUILD_USER" == "" ]]; then
  BUILD_USER=$(id -un)
fi
if [[ "$BUILD_HOST" == "" ]]; then
  BUILD_HOST=$(hostname -f)
fi
if [[ "$BUILD_DATE" == "" ]]; then
  BUILD_DATE=$(date +%d.%m.%Y)
fi
if [[ "$BUILD_SOURCE" == "" ]]; then
  BUILD_SOURCE=$(git remote -v | grep origin | cut -f2 | cut -d" " -f1 | head -n 1)
fi
if [[ "$BUILD_SOURCE" == "" ]]; then
  BUILD_SOURCE=$(git remote -v | cut -f2 | cut -d" " -f1 | head -n 1)
fi
BUILD_BUILDOPTIONS=$(echo $* | sed "s/ /§/g")

# check
if [[ "$BUILD_COMMIT" == "" ]]; then
  echo "could not automatically determine BUILD_COMMIT, please supply manually as environment variable."
  exit 1
fi
if [[ "$BUILD_USER" == "" ]]; then
  echo "could not automatically determine BUILD_USER, please supply manually as environment variable."
  exit 1
fi
if [[ "$BUILD_HOST" == "" ]]; then
  echo "could not automatically determine BUILD_HOST, please supply manually as environment variable."
  exit 1
fi
if [[ "$BUILD_DATE" == "" ]]; then
  echo "could not automatically determine BUILD_DATE, please supply manually as environment variable."
  exit 1
fi
if [[ "$BUILD_SOURCE" == "" ]]; then
  echo "could not automatically determine BUILD_SOURCE, please supply manually as environment variable."
  exit 1
fi

echo "Please notice, that this build script includes metadata into the build."
echo "This information is useful for debugging and license compliance."
echo "Run the compiled binary with the -version flag to see the information included."

if [[ $1 == "dev" ]]; then
  shift
  export CGO_ENABLED=1
  DEV="-race"
else
  export CGO_ENABLED=0
fi

# build
BUILD_PATH="github.com/safing/portbase/info"
go build $DEV -ldflags "-X ${BUILD_PATH}.commit=${BUILD_COMMIT} -X ${BUILD_PATH}.buildOptions=${BUILD_BUILDOPTIONS} -X ${BUILD_PATH}.buildUser=${BUILD_USER} -X ${BUILD_PATH}.buildHost=${BUILD_HOST} -X ${BUILD_PATH}.buildDate=${BUILD_DATE} -X ${BUILD_PATH}.buildSource=${BUILD_SOURCE}" "$@"
