nixpkgs/pkgs/games/ue4/generate-expr-from-cdn.sh

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#!/bin/sh
go() {
file="$1"
IFS=$'\n'
for pack in $(perl -n -e '/(<Pack .*\/>)/ && print "$1\n"' $file); do
remotepath=$(echo "$pack" | perl -n -e '/RemotePath="([^"]*)"/ && print $1')
hash=$(echo "$pack" | perl -n -e '/Hash="([^"]*)"/ && print $1')
url="http://cdn.unrealengine.com/dependencies/$remotepath/$hash"
until sha256=$(nix-prefetch-url $url --type sha256); do
true
done
cat <<EOF
"$hash" = fetchurl {
url = $url;
sha256 = "$sha256";
};
EOF
done
}
cat <<EOF
{ fetchurl }:
{
EOF
go Engine/Build/Commit.gitdeps.xml
go Engine/Build/Promoted.gitdeps.xml
cat <<EOF
}
EOF