Patch for composer to use temporary folder when extracting packages

composer.patch

diff --git a/src/Composer/Downloader/ArchiveDownloader.php b/src/Composer/Downloader/ArchiveDownloader.php
index abe1b68..dac64cd 100644
--- a/src/Composer/Downloader/ArchiveDownloader.php
+++ b/src/Composer/Downloader/ArchiveDownloader.php
@@ -30,7 +30,7 @@
      */
     public function download(PackageInterface $package, $path)
     {
-        $temporaryDir = $this->config->get('vendor-dir').'/composer/'.substr(md5(uniqid('', true)), 0, 8);
+        $temporaryDir = $this->config->get('vendor-dir').'/composer/.tmp/'.substr(md5(uniqid('', true)), 0, 8);
         $retries = 3;
         while ($retries--) {
             $fileName = parent::download($package, $path);

Dockerfile

# Setup the Composer installer with a patch to exclude temp files / folders to be sync with lsyncd
COPY ./composer.patch /tmp

RUN php -r "readfile('https://getcomposer.org/installer');" > /tmp/composer-setup.php \
 && php /tmp/composer-setup.php --no-ansi --install-dir=/usr/local/bin --filename=composer --snapshot && rm -rf /tmp/composer-setup.php \
 && git clone https://github.com/composer/composer.git /tmp/composer \
 && cd /tmp/composer \
 && composer install \
 && mv /tmp/composer.patch /tmp/composer \
 && cd /tmp/composer \
 && patch -p1 < /tmp/composer/composer.patch \
 && php -d phar.readonly=false /tmp/composer/bin/compile \
 && mv composer.phar /usr/local/bin/composer \
 && chmod +x /usr/local/bin/composer