add site_local_files feature for easy lib/template override

lib/App/Netdisco/Configuration.pm

@@ -3,9 +3,16 @@ package App::Netdisco::Configuration;
 use App::Netdisco::Environment;
 use Dancer ':script';
 
+use Path::Class 'dir';
+
 BEGIN {
+  if (setting('include_paths') and ref [] eq ref setting('include_paths')) {
     # stuff useful locations into @INC
-  unshift @INC, @{ (setting('include_paths') || []) };
+    push @{setting('include_paths')},
+         dir(($ENV{NETDISCO_HOME} || $ENV{HOME}), 'nd-site-local', 'lib')->stringify
+      if (setting('site_local_files'));
+    unshift @INC, @{setting('include_paths')};
+  }
 }
 
 # set up database schema config from simple config vars

lib/App/Netdisco/Manual/Configuration.pod

@@ -143,6 +143,21 @@ be loaded before (and hence override) any templates built in to Netdisco.
 If you do want to copy and override a built in web template, then create the
 directories necessary (such as "ajax" or "sidebar") in this path.
 
+Note that templates may need to have a further "C<views>" subdirectory
+created.
+
+=head3 C<site_local_files>
+
+Value: Boolean. Default: false.
+
+A shortcut for using C<include_paths> and C<template_paths>. Setting this to
+true will push C<< $home/nd-site-local/{lib,share} >> into those settings,
+respectively. You can then put Perl code in C</lib> and templates in C</share>
+within the C<nd-site-local> directory (you have to create this yourself).
+
+Note that templates may need to have a further "C<views>" subdirectory
+created.
+
 =head3 C<external_databases>
 
 Value: List of Database Configuration Hashes. Default: None.

lib/App/Netdisco/Web.pm

@@ -58,10 +58,11 @@ push @{ config->{engines}->{netdisco_template_toolkit}->{INCLUDE_PATH} },
 
 # any template paths in deployment.yml (should override plugins)
 if (setting('template_paths') and ref [] eq ref setting('template_paths')) {
-    foreach my $path (setting('template_paths')) {
+    push @{setting('template_paths')},
+         dir(($ENV{NETDISCO_HOME} || $ENV{HOME}), 'nd-site-local', 'share')->stringify
+      if (setting('site_local_files'));
     unshift @{ config->{engines}->{netdisco_template_toolkit}->{INCLUDE_PATH} },
-          $path;
-    }
+      @{setting('template_paths')};
 }
 
 # load cookie key from database

share/config.yml

@@ -13,6 +13,7 @@ log: 'warning'
 logger_format: '[%P] %U %L %m'
 include_paths:  []
 template_paths: []
+site_local_files: false
 external_databases: []
 
 # ------------