src/Composer/Package/Archiver/ZipArchiver.php
public function archive($sources, $target, $format, array $excludes = array(), $ignoreFilters = false)
    {
        $fs = new Filesystem();
        $sources = $fs->normalizePath($sources);

        $zip = new ZipArchive();
        $res = $zip->open($target, ZipArchive::CREATE);
        if ($res === true) {
            $files = new ArchivableFilesFinder($sources, $excludes, $ignoreFilters);
            foreach ($files as $file) {
                /** @var \SplFileInfo $file */
                $filepath = strtr($file->getPath()."/".$file->getFilename(), '\\', '/');
                $localname = str_replace($sources.'/', '', $filepath);
                if ($file->isDir()) {
                    $zip->addEmptyDir($localname);
                } else {
                    $zip->addFile($filepath, $localname);
                }
            }
            if ($zip->close()) {
                return $target;
            }
        }
        $message = sprintf(
            "Could not create archive '%s' from '%s': %s",
            $target,
            $sources,
            $zip->getStatusString()
        );
        throw new \RuntimeException($message);
    }
public function archive($sources, $target, $format, array $excludes = array(), $ignoreFilters = false)
    {
        $fs = new Filesystem();
        $sources = $fs->normalizePath($sources);

        $zip = new ZipArchive();
        $res = $zip->open($target, ZipArchive::CREATE);
        if ($res === true) {
            $files = new ArchivableFilesFinder($sources, $excludes, $ignoreFilters);
            foreach ($files as $file) {
                /** @var \SplFileInfo $file */
                $filepath = strtr($file->getPath()."/".$file->getFilename(), '\\', '/');
                $localname = str_replace($sources.'/', '', $filepath);
                if ($file->isDir()) {
                    $zip->addEmptyDir($localname);
                } else {
                    $zip->addFile($filepath, $localname);
                }
            }
            if ($zip->close()) {
                return $target;
            }
        }
        $message = sprintf(
            "Could not create archive '%s' from '%s': %s",
            $target,
            $sources,
            $zip->getStatusString()
        );
        throw new \RuntimeException($message);
    }
{@inheritdoc}