src/Resource/FileResource.php
private function makePaths($file)
    {
        $file = realpath($file);

        $base_path = $this->provider->vars->getPath();

        $filesystem = new Filesystem();
        $abs_path = $filesystem->makePathRelative(
            $file,
            $base_path
        );

        $this->file = $file;
        $this->filename = rtrim($abs_path, "/");
    }
private function makePaths($file)
    {
        $file = realpath($file);

        $base_path = $this->provider->vars->getPath();

        $filesystem = new Filesystem();
        $abs_path = $filesystem->makePathRelative(
            $file,
            $base_path
        );

        $this->file = $file;
        $this->filename = rtrim($abs_path, "/");
    }
Make the paths used for the filename variable

@param string $file The passed file