#!/usr/bin/env bash

ENGINE_DIR=$1
VERSION=$2

if [ -z "$ENGINE_DIR" ] || [ -z "$VERSION" ]; then
    echo 'usage: ./gen-static-ver ${ENGINE_DIR} ${VERSION}'
    exit 1
fi

DATE_COMMAND="date"
if [[ $(uname) -eq "Darwin" ]]; then
    DATE_COMMAND="docker run --rm alpine date"
fi
GIT_COMMAND="git -C $ENGINE_DIR"

staticVersion="$VERSION"
if [[ "$VERSION" == *-dev ]]; then
    gitUnix="$($GIT_COMMAND log -1 --pretty='%at')"
    gitDate="$($DATE_COMMAND --date "@$gitUnix" +'%Y%m%d.%H%M%S')"
    gitCommit="$($GIT_COMMAND log -1 --pretty='%h')"
    staticVersion="0.${gitDate}-${gitCommit}"
fi

echo "$staticVersion"