Disable individual Composer/Installers

composer-installers.diff

From b2b3e213896d7eb41a83b0b0011aa64171a917cc Mon Sep 17 00:00:00 2001
From: Thom Williams <thomscode@gmail.com>
Date: Tue, 7 Nov 2017 04:47:43 -0800
Subject: [PATCH] Add ability to disable individual or all installers

---
 src/Composer/Installers/Installer.php | 64 +++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)

diff --git a/src/Composer/Installers/Installer.php b/src/Composer/Installers/Installer.php
index 691a2e5..01693eb 100644
--- a/src/Composer/Installers/Installer.php
+++ b/src/Composer/Installers/Installer.php
@@ -103,6 +103,30 @@ class Installer extends LibraryInstaller
     );
 
     /**
+     * Installer constructor.
+     *
+     * Disables installers specified in main composer extra installer-disable
+     * list
+     *
+     * @param IOInterface                              $io
+     * @param \Composer\Composer                       $composer
+     * @param string                                   $type
+     * @param \Composer\Util\Filesystem|null           $filesystem
+     * @param \Composer\Installer\BinaryInstaller|null $binaryInstaller
+     */
+    public function __construct(
+        \Composer\IO\IOInterface $io,
+        \Composer\Composer $composer,
+        $type = 'library',
+        \Composer\Util\Filesystem $filesystem = null,
+        \Composer\Installer\BinaryInstaller $binaryInstaller = null
+    ) {
+        parent::__construct($io, $composer, $type, $filesystem,
+            $binaryInstaller);
+        $this->removeDisabledInstallers();
+    }
+
+    /**
      * {@inheritDoc}
      */
     public function getInstallPath(PackageInterface $package)
@@ -197,4 +221,44 @@ class Installer extends LibraryInstaller
     {
         return $this->io;
     }
+
+    /**
+     * Look for installers set to be disabled in composer's extra config and
+     * remove them from the list of supported installers.
+     * Uses true, "all", and "*" as global values to disable all installers.
+     *
+     * @return void
+     */
+    protected function removeDisabledInstallers()
+    {
+        $extra = $this->composer->getPackage()->getExtra();
+
+        if (!isset($extra['installer-disable'])) {
+            // No installers are disabled
+            return;
+        }
+
+        // Get installers to disable
+        $disable = $extra['installer-disable'];
+
+        // Ensure $disabled is an array
+        if (!is_array($disable)) {
+            $disable = array($disable);
+        }
+
+        // Check which installers should be disabled
+        $all = array(true, "all", "*");
+        $intersect = array_intersect($all, $disable);
+        if (!empty($intersect)) {
+            // Disable all installers
+            $this->supportedTypes = array();
+        } else {
+            // Disable specified installers
+            foreach ($disable as $key => $installer) {
+                if (key_exists($installer, $this->supportedTypes)) {
+                    unset($this->supportedTypes[$installer]);
+                }
+            }
+        }
+    }
 }
-- 
2.13.5 (Apple Git-94)

From ee686c90679adf206cabf968164baa397ed5b88e Mon Sep 17 00:00:00 2001
From: Thom Williams <thomscode@gmail.com>
Date: Tue, 7 Nov 2017 05:48:23 -0800
Subject: [PATCH] Enforce installers are specified as strings

---
 src/Composer/Installers/Installer.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Composer/Installers/Installer.php b/src/Composer/Installers/Installer.php
index c62f004..1861e2a 100644
--- a/src/Composer/Installers/Installer.php
+++ b/src/Composer/Installers/Installer.php
@@ -264,7 +264,7 @@ class Installer extends LibraryInstaller
         } else {
             // Disable specified installers
             foreach ($disable as $key => $installer) {
-                if (key_exists($installer, $this->supportedTypes)) {
+                if (is_string($installer) && key_exists($installer, $this->supportedTypes)) {
                     unset($this->supportedTypes[$installer]);
                 }
             }
-- 
2.13.5 (Apple Git-94)