Updated the Github URL to andysh-uk. Update script now downloads Composer, like the install script does.

config/services.php

@@ -15,7 +15,7 @@ return [
     */
 
     'github' => [
-        'latest_release_url' => 'https://api.github.com/repos/pandy06269/blue-twilight/releases/latest'
+        'latest_release_url' => 'https://api.github.com/repos/andysh-uk/blue-twilight/releases/latest'
     ],
 
     'recaptcha' => [

public/update.php

@@ -65,6 +65,8 @@ php artisan clear-compiled
             <?php
             $steps = [
                 ['Removing compiled cache', 'removeCompiledCached'],
+                ['Fetching Composer signature', 'fetchComposerSignature'],
+                ['Installing Composer', 'installComposer'],
                 ['Updating dependencies using Composer', 'runComposer']
             ];
 
@@ -92,6 +94,31 @@ php artisan clear-compiled
         <?php
     }
 
+    private function fetchComposerSignature()
+    {
+        if (!boolval(ini_get('allow_url_fopen')))
+        {
+            $this->echoError('allow_url_fopen is disabled so we cannot use Composer');
+            echo '<br/>';
+            $this->echoError('You will need to install the vendor libraries manually - <a href="https://github.com/pandy06269/blue-twilight/wiki/Install-Vendor-libraries-manually" target="_blank">see this page for more details</a>');
+            return false;
+        }
+
+        $signatureUrl = 'https://composer.github.io/installer.sig';
+        $this->composerSignature = trim(file_get_contents($signatureUrl));
+        if (strlen($this->composerSignature) == 0)
+        {
+            $this->echoError(sprintf("Failed downloading the Composer signature from %s", $signatureUrl));
+            return false;
+        }
+        else
+        {
+            $this->echoOK($this->composerSignature);
+        }
+
+        return true;
+    }
+
     private function removeCompiledCached()
     {
         ob_start();
@@ -155,6 +182,55 @@ php artisan clear-compiled
         echo '</span>' . PHP_EOL;
     }
 
+    private function installComposer()
+    {
+        $rc = -1;
+
+        ob_start();
+        system('php -r "copy(\'https://getcomposer.org/installer\', \'composer-setup.php\');"', $rc);
+        $result = ob_get_clean();
+        echo nl2br($result);
+
+        if ($rc != 0)
+        {
+            $this->echoError('Failed to fetch Composer');
+            return false;
+        }
+
+        ob_start();
+        system(sprintf('php -r "if (hash_file(\'SHA384\', \'composer-setup.php\') === \'%s\') { echo \'Installer verified\'; } else { echo \'Installer corrupt\'; unlink(\'composer-setup.php\'); } echo PHP_EOL;"', $this->composerSignature), $rc);
+        $result = ob_get_clean();
+        echo nl2br($result);
+        if ($rc != 0)
+        {
+            $this->echoError('Composer verification failed');
+            return false;
+        }
+
+        ob_start();
+        system('php composer-setup.php', $rc);
+        $result = ob_get_clean();
+        echo nl2br($result);
+        if ($rc != 0)
+        {
+            $this->echoError('Failed to install Composer');
+            return false;
+        }
+
+        ob_start();
+        system('php -r "unlink(\'composer-setup.php\');"', $rc);
+        $result = ob_get_clean();
+        echo nl2br($result);
+        if ($rc != 0)
+        {
+            $this->echoError('Failed to remove Composer setup file');
+            return false;
+        }
+
+        $this->echoOK();
+        return true;
+    }
+
     private function runComposer()
     {
         ob_start();