Add jobsets script

hydra/default.nix

@@ -0,0 +1,9 @@
+{
+  nix-packages,
+  nixpkgs,
+  system,
+}: let
+  pkgs = import nixpkgs {inherit system;};
+  ci = import "${nix-packages}/ci.nix" {inherit pkgs;};
+in
+  ci.buildPkgs

hydra/jobsets.nix

@@ -0,0 +1,85 @@
+{
+  prsJSON,
+  nixpkgs,
+}: let
+  pkgs = import nixpkgs {};
+  prs = builtins.fromJSON (builtins.readFile prsJSON);
+  systems = ["x86_64-linux" "aarch64-linux" "riscv64-linux"];
+  nixpkgs_version = ["master" "nixos-22.05"];
+  mkJobsets = system: version:
+    (pkgs.lib.mapAttrs (
+        num: info: {
+          enabled = 1;
+          hidden = false;
+          description = "PR ${num} (${system}-${version}): ${info.title}";
+          nixexprinput = "nix-packages";
+          nixexprpath = "hydra/default.nix";
+          checkinterval = 60;
+          schedulingshares = 100;
+          enableemail = false;
+          emailoverride = "";
+          keepnr = 1;
+          inputs = {
+            nix-packages = {
+              type = "git";
+              value = "https://github.com/${info.head.repo.owner.login}/${info.head.repo.name}.git ${info.head.ref}";
+              emailresponsible = false;
+            };
+            nixpkgs = {
+              type = "git";
+              value = "https://github.com/NixOS/nixpkgs.git ${version}";
+              emailresponsible = false;
+            };
+            system = {
+              type = "string";
+              value = system;
+            };
+          };
+        }
+      )
+      prs)
+    // {
+      main = {
+        enabled = 1;
+        hidden = false;
+        description = "nix-packages ${system}-${version}";
+        nixexprinput = "nix-packages";
+        nixexprpath = "hydra/default.nix";
+        checkinterval = 60;
+        schedulingshares = 100;
+        enableemail = false;
+        emailoverride = "";
+        keepnr = 1;
+        inputs = {
+          nix-packages = {
+            type = "git";
+            value = "https://github.com/DarkKirb/nix-packages.git main";
+            emailresponsible = false;
+          };
+          nixpkgs = {
+            type = "git";
+            value = "https://github.com/NixOS/nixpkgs.git ${version}";
+            emailresponsible = false;
+          };
+          system = {
+            type = "string";
+            value = system;
+          };
+        };
+      };
+    };
+
+  mapToAttrs = f: list: pkgs.listToAttrs (map f list);
+
+  jobsets =
+    mapToAttrs (system: {
+      name = system;
+      value =
+        mapToAttrs (version: {
+          name = version;
+          value = mkJobsets system version;
+        })
+        nixpkgs_version;
+    })
+    systems;
+in {jobsets = pkgs.writeText "jobsets.json" (builtins.toJSON jobsets);}