From 868aac8c30897423c2e65ab4c94e017a8e4b892a Mon Sep 17 00:00:00 2001
From: Ben Sima <ben@bsima.me>
Date: Thu, 23 May 2019 15:11:54 -0700
Subject: setup distributed builds over ssh

---
 common.nix          | 19 +++++++++++++++++++
 linux.nix           |  5 -----
 machines/helium.nix | 15 +++++++++++++++
 3 files changed, 34 insertions(+), 5 deletions(-)

diff --git a/common.nix b/common.nix
index c828a99..23c5244 100644
--- a/common.nix
+++ b/common.nix
@@ -45,6 +45,25 @@ in
       path = "${homedir}/cfg/home-manager";
     };
 
+    ssh = {
+      enable = true;
+      forwardAgent = true;
+      matchBlocks = {
+        hidor-kahih = {
+          hostname = "home.simatime.com";
+          user = "ben";
+          identityFile = [ "${homedir}/.ssh/hidor-kahih" ];
+          identitiesOnly = true;
+        };
+        nutin-madaj = {
+          hostname = "simatime.com";
+          user = "ben";
+          identityFile = [ "${homedir}/.ssh/id_rsa" ];
+          identitiesOnly = true;
+        };
+      };
+    };
+
     direnv = {
       enable = true;
     };
diff --git a/linux.nix b/linux.nix
index ab96729..c58ba4f 100644
--- a/linux.nix
+++ b/linux.nix
@@ -221,11 +221,6 @@ in
   };
 
   programs = {
-    ssh = {
-      enable = true;
-      forwardAgent = true;
-    };
-
     firefox = {
       enable = true;
     };
diff --git a/machines/helium.nix b/machines/helium.nix
index 2f5c166..17eef23 100644
--- a/machines/helium.nix
+++ b/machines/helium.nix
@@ -118,7 +118,22 @@
     extraOptions = ''
       gc-keep-outputs = true
       gc-keep-derivations = true
+      builders-use-substitutes = true
     '';
+
+    buildMachines = [
+      {
+        hostName = "home.simatime.com";
+        sshUser = "root";
+        sshKey = "/home/ben/.ssh/hidor-kahih";
+        system = "x86_64-linux";
+        maxJobs = 4;
+        speedFactor = 4;
+        #supportedFeatures = [ ];
+        #mandatoryFeatures = [ ];
+      }
+    ];
+    distributedBuilds = true;
   };
 
   # This value determines the NixOS release with which your system is to be
-- 
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