Merge branch 'support-yarn'

Author: VanCoding

flake.nix

@@ -17,6 +17,18 @@
       system:
       let
         nixpkgs = import pkgs { inherit system; };
+        yarn-v1 = nixpkgs.writeShellApplication {
+          name = "yarn-v1";
+          checkPhase = "";
+          runtimeInputs = [ nixpkgs.yarn ];
+          text = "yarn $@";
+        };
+        yarn-berry = nixpkgs.writeShellApplication {
+          name = "yarn-berry";
+          checkPhase = "";
+          runtimeInputs = [ nixpkgs.yarn-berry ];
+          text = "yarn $@";
+        };
         treefmt = treefmt-nix.lib.evalModule nixpkgs {
           # nixfmt is nixfmt-rfc-style
           programs.nixfmt.enable = true;
@@ -26,7 +38,12 @@
         formatter = treefmt.config.build.wrapper;
         checks =
           (nixpkgs.callPackages ./tests.nix {
-            inherit prisma-factory nixpkgs; # nixpkgs can be removed once it is renamed to pkgs
+            inherit
+              prisma-factory
+              nixpkgs
+              yarn-v1
+              yarn-berry
+              ;
           })
           // {
             format = treefmt.config.build.check self;
@@ -52,6 +69,8 @@
               nixpkgs.stdenv.cc.cc.lib
               prisma.package
               nixpkgs.nixfmt-rfc-style
+              yarn-v1
+              yarn-berry
             ];
             shellHook = prisma.shellHook;
           };

lib/readYAML.nix

@@ -0,0 +1,10 @@
+# converts path to yaml file -> Nix Object
+{ runCommand, remarshal }:
+path:
+let
+  jsonOutputDrv = runCommand "from-yaml" {
+    nativeBuildInputs = [ remarshal ];
+  } "remarshal -if yaml -i \"${path}\" -of json -o \"$out\"";
+in
+# perf: importing from / reading a file in a derivation (IFD: Import From Derivation) is known to be slow.
+builtins.fromJSON (builtins.readFile jsonOutputDrv)