diff options
| -rw-r--r-- | lib/default.nix | 59 |
1 files changed, 57 insertions, 2 deletions
diff --git a/lib/default.nix b/lib/default.nix index 8086059..8a6e7c1 100644 --- a/lib/default.nix +++ b/lib/default.nix @@ -2,6 +2,7 @@ let inherit (builtins) attrNames + concatStringsSep hashFile fetchurl fromJSON @@ -71,8 +72,6 @@ let mods); in toFile "checksums-json" toWrite; -in { - inherit mkChecksums; # this is probably what you're looking for if # you're an end user trying to implement a modpack in @@ -86,6 +85,62 @@ in { # # attrset -> path -> attrset mkPackwizPackages = pkgs: checksums: genMods pkgs (fromJSON (readFile checksums)); +in { + inherit mkChecksums mkPackwizPackages; + + # this another function modpack developers will be looking + # for. it allows you to build a modpack compatible with MultiMC + # and Prism Launcher, containing external files. + # + # `pkgs` is an instance of nixpkgs with at least lib, runCommand, + # and zip + # + # `mods` is the result of mkPackwizPackages + # + # `filesDir` is the root path of all external files you want + # included in your zipped modpack + # + # `name` is a string containing the name of your modpack + mkMultiMCPack = { + pkgs, + mods, + filesDir ? "", + name, + }: let + inherit (pkgs) fetchurl lib runCommand zip; + inherit (lib) forEach; + + packwiz-installer-bootstrap = fetchurl { + url = "https://github.com/packwiz/packwiz-installer-bootstrap/releases/download/v0.0.3/packwiz-installer-bootstrap.jar"; + sha256 = "sha256-qPuyTcYEJ46X9GiOgtPZGjGLmO/AjV2/y8vKtkQ9EWw="; + }; + + forNames = attrset: forEach (attrNames attrset); + commandSep = concatStringsSep "; "; + modFiles = let + commands = forNames mods (mod: "cp -r ${mods.${mod}} $out/decompressed/.minecraft/mods/"); + in + commandSep commands; + + regularFiles = + if filesDir != "" + then + (let + files = readDir filesDir; + commands = forNames files (file: "cp -r ${filesDir}/${file} $out/decompressed/"); + in + commandSep commands) + else "echo 'not copying external files...'"; + in + runCommand name {} '' + mkdir -p $out/decompressed/.minecraft/mods + ${regularFiles} + ${modFiles} + cp ${packwiz-installer-bootstrap} $out/decompressed/.minecraft/packwiz-installer-bootstrap.jar + + cd $out/decompressed + ${zip}/bin/zip -r ../${name}.zip {*,.*} + ''; # this creates an `apps` attribute for a flake # which runs a bash script to generate a checksums |