{

__tool=$1

# Only perform dependency checks when they are not explicitly skipped.

if [ "$vcpkgSkipDependencyChecks" = "OFF" ]; then

if ! command -v "$__tool" >/dev/null 2>&1 ; then

echo "Could not find $__tool. Please install it (and other dependencies) with:"

echo "On Debian and Ubuntu derivatives:"

echo " sudo apt-get install curl zip unzip tar"

echo "On recent Red Hat and Fedora derivatives:"

echo " sudo dnf install curl zip unzip tar"

echo "On older Red Hat and Fedora derivatives:"

echo " sudo yum install curl zip unzip tar"

echo "On SUSE Linux and derivatives:"

echo " sudo zypper install curl zip unzip tar"

echo "On Arch Linux and derivatives:"

echo " sudo pacman -Syu base-devel git curl zip unzip tar cmake ninja"

echo "On Alpine:"

echo " apk add build-base cmake ninja zip unzip curl git"

echo " (and export VCPKG_FORCE_SYSTEM_BINARIES=1)"

echo "On Solaris and illumos distributions:"

echo " pkg install web/curl compress/zip compress/unzip"

exit 1

fi

fi

{

url=$1; filePath=$2; expectedHash=$3

if command -v "sha512sum" >/dev/null 2>&1 ; then

actualHash=$(sha512sum "$filePath")

elif command -v "sha512" >/dev/null 2>&1 ; then

# OpenBSD

actualHash=$(sha512 -q "$filePath")

else

# [g]sha512sum is not available by default on osx

# shasum is not available by default on Fedora

actualHash=$(shasum -a 512 "$filePath")

fi

actualHash="${actualHash%% *}" # shasum returns [hash filename], so get the first word

if ! [ "$expectedHash" = "$actualHash" ]; then

echo ""

echo "File does not have expected hash:"

echo " url: [ $url ]"

echo " File path: [ $downloadPath ]"

echo " Expected hash: [ $sha512 ]"

echo " Actual hash: [ $actualHash ]"

exit 1

fi

{

url=$1; downloadPath=$2 sha512=$3

rm -rf "$downloadPath.part"

curl -L $url --tlsv1.2 --create-dirs --retry 3 --output "$downloadPath.part" --silent --show-error --fail || exit 1

vcpkgCheckEqualFileHash $url "$downloadPath.part" $sha512

chmod +x "$downloadPath.part"

mv "$downloadPath.part" "$downloadPath"

{

archive=$1; toPath=$2

rm -rf "$toPath" "$toPath.partial"

case "$archive" in

*.tar.gz)

mkdir -p "$toPath.partial"

$(cd "$toPath.partial" && tar xzf "$archive")

;;

*.zip)

unzip -qd "$toPath.partial" "$archive"

;;

esac

mv "$toPath.partial" "$toPath"