sebastianfeldmann / git

     * @param  string $line

     * @return bool

     */

    private function isHeaderLine(string $line): bool

    {

        $matches = [];

        if (preg_match('#^diff --git [a|b|c|i|w|o]/(.*) [a|b|c|i|w|o]/(.*)#', $line, $matches)) {

            $this->appendCollectedFileAndChanges();

            $this->currentOperation = File::OP_MODIFIED;

            $this->currentFileName  = $matches[2];

            return true;

        }

        return false;

    }

    /**

     * Is the given line a diff header similarity line.

     * @param  string $line

     * @return bool

     */

    private function isHeaderIndexLine(string $line): bool

    {

        $matches = [];

        if (preg_match('#^index\s([a-z0-9]+)\.\.([a-z0-9]+)(.*)$#i', $line, $matches)) {

            $this->currentFile = new File($this->currentFileName, $this->currentOperation);

            return true;

        }

        return false;

    }

    /**

     * Is the given line a diff header format line.