Initial commit.

lib/deploy.nix

@@ -0,0 +1,76 @@
+    let
+      pkgs = import <nixpkgs> {};
+      lib = pkgs.lib;
+
+      hosts = import ../configuration/hosts;
+      nixosHosts = lib.filterAttrs (name: host: host ? ssh) hosts;
+
+      allGroups = lib.unique (
+        lib.flatten (
+          lib.mapAttrsToList (
+            name: host: host.groups
+          ) hosts
+        )
+      );
+
+      hostsInGroup = group: 
+        lib.filterAttrs (
+          k: v: builtins.elem group v.groups
+        ) hosts;
+
+      hostsInAllGroups = lib.listToAttrs (
+        map (
+          group: lib.nameValuePair group (
+            lib.attrNames (hostsInGroup group)
+          )
+        ) allGroups );
+
+      mkDeploy = hostnames: pkgs.writeScript "deploy-${lib.concatStringsSep "-" hostnames}" ''
+        #!${pkgs.stdenv.shell}
+        set -e -o pipefail
+        export PATH=/run/wrappers/bin/:${with pkgs; lib.makeBinPath [
+          coreutils
+          openssh
+          nix
+          gnutar
+          findutils
+          nettools
+          gzip
+          git
+        ]}
+
+        MODE=$1
+        shift || true
+        ARGS=$@
+
+        [ "$MODE" == "" ] && MODE="switch"
+
+        ${lib.concatMapStrings (hostname: let
+          hostAttrs = nixosHosts.${hostname};
+          nixosSystem = (import <nixpkgs/nixos/lib/eval-config.nix> {
+            modules = [
+              "${toString ../configuration}/hosts/${hostname}/configuration.nix"
+            ];
+            system = if hostAttrs ? system then hostAttrs.system else "x86_64-linux";
+          }).config.system.build.toplevel;
+        in ''
+          (
+            echo "deploying ${hostname}..."
+            nix copy --no-check-sigs --to ssh://${hostAttrs.ssh.host} ${nixosSystem}
+            ssh $NIX_SSHOPTS ${hostAttrs.ssh.host} "sudo nix-env -p /nix/var/nix/profiles/system -i ${nixosSystem}"
+            ssh $NIX_SSHOPTS ${hostAttrs.ssh.host} "sudo /nix/var/nix/profiles/system/bin/switch-to-configuration $MODE"
+          ) &
+          PID_LIST+=" $!"
+        '') hostnames}
+
+        echo "deploys started, waiting for them to finish..."
+
+        trap "kill $PID_LIST" SIGINT
+        wait $PID_LIST
+      '';
+
+    in {
+      deploy = (lib.mapAttrs (hostname: hostAttrs: mkDeploy [ hostname ]) nixosHosts) 
+      // (lib.mapAttrs (group: hosts: mkDeploy hosts) hostsInAllGroups)
+      // { all = mkDeploy (lib.attrNames nixosHosts); };
+    }