#!/usr/bin/env bash

# Build script for ocdsgen release

set -euo pipefail

BUILD_DIR="build"
RELEASE_DIR="release"
DO_RELEASE=0

if [[ $* == *--release* ]]; then
    DO_RELEASE=1
fi

BUILD_TIME=$(date -u '+%Y-%m-%d_%H:%M:%S')
GIT_COMMIT=
VERSION=$(git describe --tags --abbrev=0 2>/dev/null || echo 'unknown')
VERSION_TAG=$(git describe --tags 2>/dev/null || echo 'unknown')

if [ "$VERSION" != "$VERSION_TAG" ]; then
    echo "Dirty commits detected, marking as development build"
    GIT_COMMIT=$(git rev-parse HEAD 2>/dev/null || echo 'unknown')
    GIT_COMMIT_SHORT=$(git rev-parse --short HEAD 2>/dev/null || echo 'unknown')
    VERSION="${VERSION}.${GIT_COMMIT_SHORT}"

    DO_RELEASE=0
    if [[ $* == *--release* && $* == *--force* ]]; then
        echo "Forcing release build anyway"
        DO_RELEASE=1
    fi
fi

LD_FLAGS=${LD_FLAGS:-""}
LD_FLAGS="$LD_FLAGS -X git.avsdev.uk/Go/go-ocds/internal/version.Version=${VERSION}"
if [[ $DO_RELEASE -ne 1 ]]; then
    LD_FLAGS="$LD_FLAGS -X git.avsdev.uk/Go/go-ocds/internal/version.BuildTime=${BUILD_TIME}"
fi
if [ "$GIT_COMMIT" != "" ]; then
    LD_FLAGS="$LD_FLAGS -X git.avsdev.uk/Go/go-ocds/internal/version.GitCommit=${GIT_COMMIT}"
fi

# Build binary with version info
go build \
    -ldflags="$LD_FLAGS" \
    -trimpath \
    -o $BUILD_DIR/ocdsgen-$VERSION \
    ./cmd/ocdsgen

echo "Built $BUILD_DIR/ocdsgen-$VERSION"

# If proper release, copy to output directory for packaging
if [[ $DO_RELEASE -eq 1 ]]; then
    install -DT $BUILD_DIR/ocdsgen-$VERSION $RELEASE_DIR/ocdsgen
    ARCH=`dpkg --print-architecture`
    tar -czf $RELEASE_DIR/ocdsgen-$VERSION-$ARCH.tar.gz \
      --transform "s,^$RELEASE_DIR/,ocdsgen-$VERSION-$ARCH/," \
      $RELEASE_DIR/ocdsgen
    echo "Installed $RELEASE_DIR/ocdsgen"
fi