Add attic

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

packages/docker/attic/default.nix

@@ -0,0 +1,34 @@
+{ pkgs, ... }:
+let
+  entrypoint = pkgs.writeTextFile {
+    name = "entrypoint";
+    executable = true;
+    destination = "/bin/entrypoint";
+    text = builtins.readFile ./entrypoint.sh;
+  };
+in
+pkgs.dockerTools.buildImage {
+  name = "attic";
+  fromImage = pkgs.docker-image-base;
+
+  copyToRoot = pkgs.buildEnv {
+    name = "root";
+    paths = with pkgs; [
+      entrypoint
+      attic-server
+      attic-client
+    ];
+    pathsToLink = [ "/bin" ];
+  };
+
+  config = {
+    Entrypoint = [ "entrypoint" ];
+    ExposedPorts = {
+      "8080/tcp" = { };
+    };
+    WorkingDir = "/var/lib/atticd";
+    Volumes = {
+      "/var/lib/atticd" = { };
+    };
+  };
+}

packages/docker/attic/entrypoint.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env sh
+
+set -o errexit
+set -o nounset
+
+atticd "$@" &
+PID=$!
+
+if [ -f /etc/attic/post-start.sh ]; then
+  # shellcheck disable=SC1091
+  . /etc/attic/post-start.sh
+fi
+
+trap 'kill -KILL "$PID"' INT TERM
+wait "$PID"
+exit $?