Dart tools

dart-sdk-updater.sh

#!/bin/sh

chan="dev"

os=$(uname -s)
if [[ ${os} == "Linux" ]]
then
    os="linux"
else
    os="macos"
fi

arch=$(uname -m)
if [ ${arch} == "x86_64" ]; then
  arch="x64"
else
  arch="ia32"
fi

remote="https://storage.googleapis.com/dart-archive/channels/${chan}/release/latest/sdk/dartsdk-${os}-${arch}-release.zip"


if [[ -e dart-sdk ]]; then 
    localVersion=$(stat -c %x dart-sdk)
    localVersion=$(date -d "${localVersion}" +"%s")

    key="Last-Modified:"

    lastModified=$(wget -S --spider $remote 2>&1 | grep -i $key)

    lastModified="${lastModified#"${lastModified%%[![:space:]]*}"}"
    lastModified=${lastModified#"$key"}
    lastModified="${lastModified#"${lastModified%%[![:space:]]*}"}"

    lastModified=$(date -d "${lastModified}" +"%s")

    if [[ $localVersion -ge $lastModified ]]; then
        echo "up to date"
        exit 0
    fi
fi

remoteSum="${remote}.sha256sum"

wget -N $remote
wget -N $remoteSum

localArchive="dartsdk-${os}-${arch}-release.zip"
localArchiveSum="${localArchive}.sha256sum"

sha256sum -c $localArchiveSum

if [[ $? -gt 0 ]]; then
    echo "wrong checksum"
    exit 1
fi

rm -rf dart-sdk

unzip $localArchive

rm $localArchiveSum
rm $localArchive