6 files changed, 24 insertions, 2 deletions
diff --git a/cmd/dnsupdate/README.org b/tools/dnsupdate/README.org
index a80e407..2e7ca01 100644
--- a/cmd/dnsupdate/README.org
+++ b/tools/dnsupdate/README.org
@@ -1,7 +1,10 @@
 #+TITLE: dnsupdate
 
-Utility to update the managed zone for =fcuny.xyz= in Google Cloud.
+Utility to update the managed zone for =fcuny.xyz= in Google Cloud DNS.
 
 I use the domain =fcuny.xyz= to run a number of services on an IP provided by Tailscale. I don't want these domains to be visible on the web, but I also want to have a valid HTTPS certificate for them. By having a proper DNS I can use ACME to get the certificates, without making them available.
 
 Instead of updating the subdomains through the [[https://console.cloud.google.com/net-services/dns/zones/fcuny-xyz/details?project=fcuny-homelab][console]], I can now run this program.
+
+* Run
+To update the records, run =nix run .#tools.dnsupdate.push=.
diff --git a/tools/dnsupdate/default.nix b/tools/dnsupdate/default.nix
new file mode 100644
index 0000000..b8201c0
--- /dev/null
+++ b/tools/dnsupdate/default.nix
@@ -0,0 +1,19 @@
+{ pkgs, ... }:
+
+pkgs.buildGoModule rec {
+  name = "dnsupdate";
+  src = ./.;
+  vendorSha256 = "sha256-DQ/kYC/EZpcOKk0Y+DvwJtAPZpamxvEl7gKk8uEB2Ls=";
+  nativeBuildInputs = with pkgs; [ go ];
+
+  push = pkgs.writers.writeBashBin "dns-push" ''
+    set -ueo pipefail
+
+    cd $(git rev-parse --show-toplevel)/tools/dnsupdate
+
+    export TS_API_KEY=$(pass api/api.tailscale.com)
+    export GOOGLE_APPLICATION_CREDENTIALS=/run/agenix/gcloud/world-nix
+
+    go run .
+  '';
+}
diff --git a/go.mod b/tools/dnsupdate/go.mod
index 567819c..99fcce4 100644
--- a/go.mod
+++ b/tools/dnsupdate/go.mod
@@ -1,4 +1,4 @@
-module golang.fcuny.net/world
+module golang.fcuny.net/world/tools/dnsupdate
 
 go 1.16
 
diff --git a/go.sum b/tools/dnsupdate/go.sum
index d2af195..d2af195 100644
--- a/go.sum
+++ b/tools/dnsupdate/go.sum
diff --git a/cmd/dnsupdate/main.go b/tools/dnsupdate/main.go
index 6748ee9..6748ee9 100644
--- a/cmd/dnsupdate/main.go
+++ b/tools/dnsupdate/main.go
diff --git a/cmd/dnsupdate/ts.go b/tools/dnsupdate/ts.go
index 4d3ebb3..4d3ebb3 100644
--- a/cmd/dnsupdate/ts.go
+++ b/tools/dnsupdate/ts.go