Use debconf to allow for command-line or unattended installation

debian/config

@@ -0,0 +1,21 @@
+#!/bin/sh -e
+
+. /usr/share/debconf/confmodule
+
+readonly ACTION="${1:-configure}"
+readonly VERSION="${2:-dev}"
+
+db_input "high" "dokku/web_config" || true
+db_go || true
+
+db_get "dokku/web_config"
+if [ $RET = "true" ]; then
+    exit 0
+fi
+
+db_input "high" "dokku/hostname" || true
+db_input "high" "dokku/vhost_enable" || true
+if [ "$ACTION" != "reconfigure" ]; then
+  db_input "high" "dokku/key_file" || true
+fi
+db_go || true

debian/postinst

@@ -1,6 +1,10 @@
 #!/bin/sh
 set -e
 
+. /usr/share/debconf/confmodule
+
+readonly DOKKU_ROOT="${DOKKU_ROOT:-/home/dokku}"
+
 case "$1" in
   abort-upgrade|abort-remove|abort-deconfigure)
     ;;
@@ -19,6 +23,27 @@ case "$1" in
     if [ -f /etc/init/dokku-installer.conf ] && service dokku-installer status 2> /dev/null | grep waiting; then
         sudo service dokku-installer start
     fi
+
+    db_get "dokku/web_config"
+    if [ "$RET" = "true" ]; then
+      exit 0
+    fi
+
+    db_get "dokku/vhost_enable"
+    if [ "$RET" = "true" ]; then
+        db_get "dokku/hostname" 
+        echo "$RET" > "${DOKKU_ROOT}/VHOST"
+    else
+        rm -f "${DOKKU_ROOT}/VHOST"
+    fi
+
+    db_get "dokku/hostname"
+    echo "$RET" > "${DOKKU_ROOT}/HOSTNAME"
+
+    if [ -z "${DEBCONF_RECONFIGURE}" ]; then
+      db_get "dokku/key_file"
+      sshcommand acl-add dokku default < "$RET"
+    fi
     ;;
 
   *)

debian/preinst

@@ -1,8 +1,25 @@
 #!/bin/sh
 set -e
 
+. /usr/share/debconf/confmodule
+
 case "$1" in
   install)
+    if [ -z "${DEBCONF_RECONFIGURE}" ]; then
+      db_get "dokku/key_file"
+      if [ ! -f "$RET" ]; then
+          echo "Error: keyfile '$RET' not found."
+          echo "       you can enter a new keyfile path when you restart the installation."
+          db_reset "dokku/key_file"
+          exit 1
+      fi
+    fi
+
+    db_get "dokku/web_config"
+    if [ "$RET" = "false" ]; then
+      exit 0
+    fi
+
     INIT_CONF="/etc/init/dokku-installer.conf"
     NGINX_CONF="/etc/nginx/conf.d/dokku-installer.conf"
 

debian/templates

@@ -0,0 +1,19 @@
+Template: dokku/web_config
+Description: Use the web-based config page?
+Type: boolean
+Default: true
+
+Template: dokku/vhost_enable
+Description: Use vhost based deployments?
+Type: boolean
+Default: false
+
+Template: dokku/hostname
+Description: Machine's hostname or IP
+Type: string
+Default: dokku.me
+
+Template: dokku/key_file
+Description: Keyfile for initial user
+Type: string
+Default: /root/.ssh/id_rsa.pub