Add support for multisite installs using subdirectories

Dockerfile.gravcore

@@ -45,6 +45,7 @@ RUN \
 EXPOSE 80 443
 
 COPY root/ /
+COPY env/ /tmp/env/
 
 WORKDIR /var/www/grav
 

Dockerfile.gravcoreadmin

@@ -47,5 +47,6 @@ EXPOSE 80 443
 COPY root/ /
 
 WORKDIR /var/www/grav
+COPY env/ /tmp/env/
 
 CMD ["/init-admin"]

README.md

@@ -27,6 +27,7 @@ A Docker image based on minideb:buster linux with Grav CMS and PHP7.3/nginx.
 + nginx
 + GRAV Core
 + GRAV Admin Plugin
++ optional [multisite installation](https://learn.getgrav.org/16/advanced/multisite-setup) using subdirectories
 
 ## Usage
 
@@ -44,6 +45,8 @@ docker create \
 docker start grav
 ```
 
+> Use the `-e GRAV_MULTISITE=dir` flag for a Grav multisite installation using subdirectories (see below). Multisite using subdomains is not yet supported.
+
 ## Tags
 
 [latest, core, 1.6.28, core-1.6.28 (Dockerfile)](https://github.com/dsavell/docker-grav/blob/master/Dockerfile.gravcore)
@@ -70,6 +73,7 @@ Container images are configured using parameters passed at runtime (such as thos
 | `-p 80` | http |
 | `-e DUID=1000` | for UserID - see below for explanation |
 | `-e DGID=1000` | for GroupID - see below for explanation |
+| `-e GRAV_MULTISITE=dir` | Deploy a Grav multisite (subdirectory) installation |
 | `-v /var/www/backup` | Contains your location for Grav backups |
 | `-v /var/www/logs` | Contains your location for your Grav log files |
 | `-v /var/www/user` | Contains your Grav content |

env/setup_subdirectory.php

@@ -0,0 +1,40 @@
+<?php
+/**
+ * Multisite setup for sub-directories or path based
+ * URLs for subsites.
+ *
+ * DO NOT EDIT UNLESS YOU KNOW WHAT YOU ARE DOING!
+ */
+
+use Grav\Common\Filesystem\Folder;
+
+// Get relative path from Grav root.
+$path = isset($_SERVER['PATH_INFO'])
+ ? $_SERVER['PATH_INFO']
+ : Folder::getRelativePath($_SERVER['REQUEST_URI'], ROOT_DIR);
+
+// Extract name of subsite from path
+$name = Folder::shift($path);
+$folder = "sites/{$name}";
+$prefix = "/{$name}";
+
+if (!$name || !is_dir(ROOT_DIR . "user/{$folder}")) {
+ return [];
+}
+
+// Prefix all pages with the name of the subsite
+$container['pages']->base($prefix);
+
+return [
+ 'environment' => $name,
+ 'streams' => [
+ 'schemes' => [
+ 'user' => [
+ 'type' => 'ReadOnlyStream',
+ 'prefixes' => [
+ '' => ["user/{$folder}"],
+ ]
+ ]
+ ]
+ ]
+];

env/setup_subdomain.php

@@ -0,0 +1,34 @@
+<?php
+/**
+ * Multisite setup for subsites accessible via sub-domains.
+ *
+ * DO NOT EDIT UNLESS YOU KNOW WHAT YOU ARE DOING!
+ */
+
+use Grav\Common\Utils;
+
+// Get subsite name from sub-domain
+$environment = isset($_SERVER['HTTP_HOST'])
+ ? $_SERVER['HTTP_HOST']
+ : (isset($_SERVER['SERVER_NAME']) ? $_SERVER['SERVER_NAME'] : 'localhost');
+// Remove port from HTTP_HOST generated $environment
+$environment = strtolower(Utils::substrToString($environment, ':'));
+$folder = "sites/{$environment}";
+
+if ($environment === 'localhost' || !is_dir(ROOT_DIR . "user/{$folder}")) {
+ return [];
+}
+
+return [
+ 'environment' => $environment,
+ 'streams' => [
+ 'schemes' => [
+ 'user' => [
+ 'type' => 'ReadOnlyStream',
+ 'prefixes' => [
+ '' => ["user/{$folder}"],
+ ]
+ ]
+ ]
+ ]
+];

root/init-admin

@@ -33,9 +33,18 @@ if [[ ! -e /var/www/grav/user/config/site.yaml ]]; then
  cp -r /grav/grav-admin/user /var/www/grav
 fi
 
+# check for supported GRAV_MULTISITE setting
+echo "Checking for multisite environment .."
+if [[ ! -z "${GRAV_MULTISITE}" && "$GRAV_MULTISITE" == "dir" ]]; then
+ echo "Copying multisite setup.php .."
+ cp /tmp/env/setup_subdirectory.php /var/www/grav/setup.php
+ mkdir -p /var/www/grav/user/sites
+fi
+
 # Clean
 rm -rf /grav
 rm -rf /var/www/html
+rm -rf /tmp/env
 
 DUID=${DUID:-911}
 DGID=${DGID:-911}

root/init-core

@@ -33,9 +33,18 @@ if [[ ! -e /var/www/grav/user/config/site.yaml ]]; then
  cp -r /grav/grav/user /var/www/grav
 fi
 
+# check for supported GRAV_MULTISITE setting
+echo "Checking for multisite environment .."
+if [[ ! -z "${GRAV_MULTISITE}" && "$GRAV_MULTISITE" == "dir" ]]; then
+ echo "Copying multisite setup.php .."
+ cp /tmp/env/setup_subdirectory.php /var/www/grav/setup.php
+ mkdir -p /var/www/grav/user/sites
+fi
+
 # Clean
 rm -rf /grav
 rm -rf /var/www/html
+rm -rf /tmp/env
 
 DUID=${DUID:-911}
 DGID=${DGID:-911}