How to stop the package \usepackage{parskip} disabling the paragraph indentation? [duplicate]

Question

I would like to automatically insert vertical space between my paragraphs. Currently I am using \medskip before all my paragraphs. Example:

% proposal.tex
% Based on http://www.latextemplates.com/template/simple-sectioned-essay
\documentclass[12pt]{article}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[a4paper, margin=2cm]{geometry}
\usepackage[brazil]{babel}

\usepackage[utf8]{inputenc}
\usepackage{mathptmx}

\usepackage{indentfirst}

\begin{document}

\section{Introdução}

    In typesetting advertisement copy, a way of justifying paragraphs has
    become popular in recent years that is somewhere between flushright
    and raggedrightdddd setting. Lines that would stretch beyond certain limits
    are set with their glue at natural width. This single paragraph is but an
    example of this procedure; the macros are given next.

    \medskip
    Second paragraph.

\end{document}

Which generates:

After searching I found about including the package \usepackage{parskip}. However after I do so, all my paragraphs indentations are disabled.

Therefore searching again I found I could use \setlength{\parindent}{30pt} to reset the paragraph indentation, however I am not sure this is a nice thing to do.

% proposal.tex
% Based on http://www.latextemplates.com/template/simple-sectioned-essay
\documentclass[12pt]{article}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[a4paper, margin=2cm]{geometry}
\usepackage[brazil]{babel}

\usepackage[utf8]{inputenc}
\usepackage{mathptmx}

\usepackage{indentfirst}

\usepackage{parskip}
\setlength{\parindent}{30pt}

\begin{document}

\section{Introdução}

    In typesetting advertisement copy, a way of justifying paragraphs has
    become popular in recent years that is somewhere between flushright
    and raggedrightdddd setting. Lines that would stretch beyond certain limits
    are set with their glue at natural width. This single paragraph is but an
    example of this procedure; the macros are given next.

    Second paragraph.

\end{document}

Which generates:

I would like to know whether there is a best way which I can include the package \usepackage{parskip} and keep the default LaTeX paragraph indentation, instead of overriding the overrode value with \setlength{\parindent}{30pt}.

Answer 1

The parskip package contains a line \parindent=\z@ which zeroes out the \parindent. Thus, one can save the current \parindent before loading the parskip package, and then reinstate that value of \parindent.

Incidentally, overriding the \parindent with your 30pt setting is a perfectly valid form of coding, though there are some who argue from a stylistic viewpoint that at least one of \parskip and \parindent should be exactly 0pt, but you would get no argument from me.

\documentclass{article}
\usepackage{lipsum}
\edef\svtheparindent{\the\parindent}
\usepackage{parskip}
\parindent=\svtheparindent\relax
\begin{document}
\lipsum[1-6]
\end{document}