variables.tex

\newcommand{\varAddress}{}
\newcommand{\setAddress}[1]{\renewcommand{\varAddress}{#1}}

\newcommand{\varEmail}{}
\newcommand{\setEmail}[1]{\renewcommand{\varEmail}{#1}}

\newcommand{\varMobile}{}
\newcommand{\setMobile}[1]{\renewcommand{\varMobile}{#1}}

\newcommand{\varScholar}{}
\newcommand{\setScholar}[1]{\renewcommand{\varScholar}{#1}}

\newcommand{\varGithub}{}
\newcommand{\setGithub}[1]{\renewcommand{\varGithub}{#1}}

\newcommand{\varTwitter}{}
\newcommand{\setTwitter}[1]{\renewcommand{\varTwitter}{#1}}

\newcommand{\varWeb}{}
\newcommand{\setWeb}[1]{% optional
  \DoIfNotEmpty{#1}
    {\renewcommand{\varWeb}{#1}}%
  }

% helper
% from http://tex.stackexchange.com/a/44938/39530
\makeatletter
\newcommand{\DoIfNotEmpty}[1]{%
  \begingroup
  \sbox0{#1}%
  \ifdim\wd0=\z@
    \endgroup
    \expandafter\@gobble
  \else
    \endgroup
    \expandafter\@firstofone
  \fi}
\makeatother

% external link icon
\newcommand{\externallink}[0]{%
  \space\includegraphics[height=\fontcharht\font`\B]{images/externallink}
}