Add adguardhome

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

packages/docker/adguardhome/default.nix

@@ -0,0 +1,36 @@
+{ pkgs, ... }:
+let
+  entrypoint = pkgs.writeTextFile {
+    name = "entrypoint";
+    executable = true;
+    destination = "/bin/entrypoint";
+    text = builtins.readFile ./entrypoint.sh;
+  };
+in
+pkgs.dockerTools.buildImage {
+  name = "adguardhome";
+  fromImage = import ../base { inherit pkgs; };
+
+  copyToRoot = pkgs.buildEnv {
+    name = "root";
+    paths = with pkgs; [
+      entrypoint
+      adguardhome
+      apacheHttpd
+      yq-go
+    ];
+    pathsToLink = [ "/bin" ];
+  };
+
+  config = {
+    Entrypoint = [ "entrypoint" ];
+    ExposedPorts = {
+      "53/tcp" = { };
+      "53/udp" = { };
+      "80/tcp" = { };
+    };
+    Volumes = {
+      "/var/lib/adguard" = { };
+    };
+  };
+}

packages/docker/adguardhome/entrypoint.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env sh
+
+set -o errexit
+set -o nounset
+
+ADGUARD_ADMIN_USERNAME=${ADGUARD_ADMIN_USERNAME:-admin}
+
+mkdir -p /etc/adguard
+touch /etc/adguard/config.yaml
+
+if [ -f /etc/adguard/config.yaml.default ]; then
+  cp /etc/adguard/config.yaml.default /etc/adguard/config.yaml
+fi
+
+password="$(htpasswd -B -C 10 -n -b "$ADGUARD_ADMIN_USERNAME" "$ADGUARD_ADMIN_PASSWORD" | cut -d ':' -f2-)"
+yq eval -i ".users = [{\"name\": \"$ADGUARD_ADMIN_USERNAME\", \"password\": \"$password\"}]" /etc/adguard/config.yaml
+
+LOG_PIPE="$(mktemp -u)"
+mkfifo "$LOG_PIPE"
+
+(
+  while IFS= read -r line; do
+    if echo "$line" | grep -qEi "\[(WARN|ERROR|FATAL)\]"; then
+      echo "$line" >&2
+    else
+      echo "$line"
+    fi
+  done < "$LOG_PIPE"
+) &
+
+exec AdGuardHome \
+  -c /etc/adguard/config.yaml \
+  -w /var/lib/adguard \
+  "$@" > "$LOG_PIPE" 2>&1