1 files changed, 44 insertions, 0 deletions
diff --git a/Urbit/Ship.nix b/Urbit/Ship.nix
new file mode 100644
index 0000000..ec6a9ec
--- /dev/null
+++ b/Urbit/Ship.nix
@@ -0,0 +1,44 @@
+{ bild ? import ../Biz/Bild.nix {}
+}:
+
+# This represents a single ship running in a container.
+
+let
+  # bootstrap & startup process, expects two files:
+  # - /ship.name: containing a ship name like 'sampel-palnet'
+  # - /ship.key: containing the key
+  urbit-start = bild.pkgs.writeScript "urbit-start" ''
+    #!${bild.pkgs.runtimeShell}
+    set -xeuo pipefail
+
+    ship=$(cat /ship.name)
+    pier="/$ship"
+
+    if [ -d "$pier" ]; then
+      # pack pier if it exists, to save space
+      /bin/urbit-worker pack "$pier"
+    else
+      # otherwise, setup
+      /bin/urbit -c "$pier" -k /ship.key -x
+    fi
+
+    /bin/urbit -tq "$pier"
+  '';
+in bild.image {
+  name = "urbit-ship";
+  tag = "latest";
+
+  fromImage = null; # scratch
+
+  contents = bild.pkgs.urbit;
+
+  config = {
+    Cmd = [
+      "${urbit-start}"
+    ];
+    WorkingDir = "/";
+    Volumes = {
+      "/" = { };
+    };
+  };
+}