Add support for hooks template, to implement custom lifecycle commands without overriding complete templates

node-deb

@@ -274,6 +274,12 @@ while [ -n "$1" ]; do
       template_executable="$value"
       shift
       ;;
+    --template-hooks)
+      # HELPDOC: Override hooks template (default: 'node_deb.templates.hooks' from package.json then built-in)
+      zero_check "$value" "$param"
+      template_executable="$value"
+      shift
+      ;;
     --template-postinst)
       # HELPDOC: Override maintainer script postinst template (default: 'node_deb.templates.postinst' from package.json then built-in)
       zero_check "$value" "$param"
@@ -521,6 +527,16 @@ fi
 : ${template_executable:="$node_deb_dir/templates/executable"}
 log_debug "The executable template has been set to: $template_executable"
 
+# Set hooks template
+if [ -z "$template_hooks" ]; then
+  template_hooks=$(jq -r '.node_deb.templates.hooks' package.json)
+  if [[ "$template_hooks" == 'null' ]]; then
+    template_hooks=''
+  fi
+fi
+: ${template_hooks:="$node_deb_dir/templates/hooks"}
+log_debug "The hooks template has been set to: $template_hooks"
+
 # Set postinst template
 if [ -z "$template_postinst" ]; then
   template_postinst=$(jq -r '.node_deb.templates.postinst' package.json)
@@ -611,6 +627,7 @@ log_debug "The CLI entrypoint has been set to: $cli_entrypoint"
 
 
 deb_dir="${package_name}_${package_version}_${architecture}"
+hooks_path="usr/share/$package_name/scripts/hooks"
 
 finish() {
   if [ $no_delete_temp -ne 1 ]; then
@@ -693,6 +710,7 @@ replace_vars() {
     -e "s/{{ node_deb_group }}/$(escape "$group")/g" \
     -e "s/{{ node_deb_init }}/$(escape "$init")/g" \
     -e "s/{{ node_deb_no_rebuild }}/$(escape "$no_rebuild")/g" \
+    -e "s/{{ node_deb_hooks }}/$(escape "/$hooks_path")/g" \
     -e "s/{{ node_deb_version }}/$(escape "$node_deb_version")/g" \
     -e "s/{{ install_strategy }}/$(escape "$install_strategy")/g" \
   > "$target_file"
@@ -706,6 +724,7 @@ replace_vars "$template_postinst" "$deb_dir/DEBIAN/postinst" '0755'
 replace_vars "$template_postrm" "$deb_dir/DEBIAN/postrm" '0755'
 replace_vars "$template_prerm" "$deb_dir/DEBIAN/prerm" '0755'
 replace_vars "$template_executable" "$deb_dir/usr/share/$package_name/bin/$executable_name" '0755'
+replace_vars "$template_hooks" "$deb_dir/$hooks_path" '0755'
 replace_vars "$template_default_variables" "$deb_dir/etc/default/$package_name" '0644'
 
 if [ "$init" == 'auto' ] || [ "$init" == 'upstart' ]; then

templates/hooks

@@ -0,0 +1,13 @@
+#!/bin/bash
+# This file was autogenerated by node-deb {{ node_deb_version }}
+set -e
+set -o pipefail
+
+case "$1" in
+  postinst)
+    ;;
+  prerm)
+    ;;
+  postrm)
+    ;;
+esac

templates/postinst

@@ -117,6 +117,8 @@ dependency_install '{{ node_deb_package_name }}'
 mkdir -p '/var/log/{{ node_deb_package_name }}'
 chown -R '{{ node_deb_user }}:{{ node_deb_group }}' '/var/log/{{ node_deb_package_name }}'
 
+{{node_deb_hooks}} "postinst $@"
+
 if [[ "$init_type" != 'none' ]]; then
   start_service '{{ node_deb_package_name }}'
 fi

templates/postrm

@@ -3,6 +3,8 @@
 set -e
 set -o pipefail
 
+{{node_deb_hooks}} "postrm $@"
+
 # Will return true even if deletion fails
 delete_user() {
   : "${1:?'User was not defined'}"
@@ -40,6 +42,6 @@ case "$1" in
     rm -rf '/var/log/{{ node_deb_package_name }}'
     ;;
   *)
-    echo "postinst called with unknown argument '$1'"
+    echo "postrm called with unknown argument '$1'"
     ;;
 esac

templates/prerm

@@ -3,6 +3,8 @@
 set -e
 set -o pipefail
 
+{{node_deb_hooks}} "prerm $@"
+
 declare -r init_type='{{ node_deb_init }}'
 declare -r service_name='{{ node_deb_package_name }}'