Volume mount for local gitconfig

[dafeder]

Assuming someone has a ~/.gitconfig file, this will mount it in /root on cli allowing you to use git with your normal username.

If you don't have a ~/.gitconfig though, git will fail on cli because it will create a volume mount folder instead of mounting the existing file. Perhaps there is a better way to accomplish this.

[dafeder]

I'm withdrawing this PR; too likely to break the CLI container. For now I'm adding the following as custom command code in my application; this may be a candidate for dkan-tools core in the future:

    /**
     * Check if user.email exists in current git config.
     *
     * @return bool
     */
    private function gitHasConfig() {
        $configEmail = $this->taskExec('git config --get "user.email"')
            ->printOutput(false)
            ->run()
            ->getMessage();

        return ($configEmail ? true : false);
    }

    /**
     * Configure git in current environment with user name and email.
     *
     * @option name
     *   The user name to pass to git config
     * @option email
     *   The user email to pass to git config
     */
    public function gitConfig($opts = ['name' => NULL, 'email' => NULL])
    {
        $this->io()->title('Configure git with your name and email');
        if ($opts['name']) {
            $userName = $opts['name'];
            $this->io()->note("Name: $userName");
        }
        else {
            $userName = $this->io()->ask('Name');
        }

        if ($opts['email']) {
            $userEmail = $opts['email'];
            $this->io()->note("Email: $userEmail");
        }
        else {
            $userEmail = $this->io()->ask('Email');
        }

        $result = $this->taskExecStack()
            ->stopOnFail()
            ->exec("git config --global user.name '$userName'")
            ->exec("git config --global user.email '$userEmail'")
            ->run();

        return $result;
    }