Add hydra configuration

hydra.json

@@ -0,0 +1,29 @@
+{
+  "enabled": 1,
+  "hidden": true,
+  "description": "Jobsets",
+  "nixexprinput": "src",
+  "nixexprpath": "jobsets.nix",
+  "checkinterval": 300,
+  "schedulingshares": 100,
+  "enableemail": false,
+  "emailoverride": "",
+  "keepnr": 10,
+  "inputs": {
+    "src": {
+      "type": "git",
+      "value": "https://github.com/reflex-frp/reflex.git develop",
+      "emailresponsible": false
+    },
+    "nixpkgs": {
+      "type": "git",
+      "value": "https://github.com/NixOS/nixpkgs-channels nixos-unstable",
+      "emailresponsible": false
+    },
+    "prs": {
+      "type": "githubpulls",
+      "value": "reflex-frp reflex",
+      "emailresponsible": false
+    }
+  }
+}

jobsets.json

@@ -0,0 +1,70 @@
+{ prs }:
+
+let
+  pkgs = import ./nixpkgs {};
+  mkFetchGithub = value: {
+    inherit value;
+    type = "git";
+    emailresponsible = false;
+  };
+in
+with pkgs.lib;
+let
+  defaults = jobs: {
+    inherit (jobs) description;
+    enabled = 1;
+    hidden = false;
+    keepnr = 10;
+    schedulingshares = 100;
+    checkinterval = 120;
+    enableemail = false;
+    emailoverride = "";
+    nixexprinput = "reflex";
+    nixexprpath = "release.nix";
+    inputs = jobs.inputs // {
+      nixpkgs = {
+        type = "git";
+        value = "https://github.com/NixOS/nixpkgs-channels nixos-unstable";
+        emailresponsible = false;
+      };
+      config = {
+        type = "nix";
+        value = "{ android_sdk.accept_license = true; }";
+        emailresponsible = false;
+      };
+    };
+  };
+  branchJobset = branch: defaults {
+    description = "reflex-${branch}";
+    inputs = {
+      reflex = {
+        value = "https://github.com/reflex-frp/reflex ${branch}";
+        type = "git";
+        emailresponsible = false;
+      };
+    };
+  };
+  makePr = num: info: {
+    name = "reflex-pr-${num}";
+    value = defaults {
+      description = "#${num}: ${info.title}";
+      inputs = {
+        reflex = {
+          #NOTE: This should really use "pull/${num}/merge"; however, GitHub's
+          #status checks only operate on PR heads.  This creates a race
+          #condition, which can currently only be solved by requiring PRs to be
+          #up to date before they're merged.  See
+          #https://github.com/isaacs/github/issues/1002
+          value = "https://github.com/reflex-frp/reflex pull/${num}/head";
+          type = "git";
+          emailresponsible = false;
+        };
+      };
+    };
+  };
+  processedPrs = mapAttrs' makePr (builtins.fromJSON (builtins.readFile prs));
+  jobsetsAttrs = processedPrs //
+    genAttrs ["develop"] branchJobset;
+in {
+  jobsets = pkgs.writeText "spec.json" (builtins.toJSON jobsetsAttrs);
+}

release.nix

@@ -0,0 +1,15 @@
+{ rp-src ? (import <nixpkgs> {}).fetchFromGitHub {
+    owner = "reflex-frp";
+    repo = "reflex-platform";
+    rev = "384cd850f3adf1d404bced2424b5f6efb0f415f2";
+    sha256 = "1ws77prqx8khmp8j6br1ij4k2v4dlgv170r9fmg0p1jivfbn8y9d";
+  }
+}:
+let
+  rp = import rp-src {};
+  inherit (rp.nixpkgs) lib;
+  compilers = ["ghc8_4" "ghc8_0" "ghcjs8_4" "ghcjs8_0"];
+in lib.genAttrs compilers (ghc: {
+  reflex-useTemplateHaskell = rp.${ghc}.callPackage ./. { useTemplateHaskell = true; };
+  reflex = rp.${ghc}.callPackage ./. { useTemplateHaskell = false; };
+})