Saving Aristotle: How can Biblatex redefinitions be made conditional on the style selected (or otherwise made more fool-proof)?

The current styles are stored in the internal macros \blx@bbxfile and \blx@cbxfile. Happy branching!

\documentclass{article}

\usepackage[style=authoryear,citestyle=verbose]{biblatex}

\begin{document}

\csname blx@bbxfile\endcsname

\csname blx@cbxfile\endcsname

\end{document}

This is a supplement to Henri Menke's answer, just in case anybody else needs something like this. Based on that answer, here's how I set the conditionalisation up in biblatex.cfg.

% ateb Henri Menke: https://tex.stackexchange.com/a/365438/
% bibstyle name: \csname blx@bbxfile\endcsname
% citestyle name: \csname blx@cbxfile\endcsname

\newif\ifcfr@biblatex@authorcomp
\cfr@biblatex@authorcompfalse
\def\cfr@blx@splitfile#1-#2\@null{#1}
\edef\tempa{\expandafter\cfr@blx@splitfile\blx@cbxfile-x\@null}
\edef\tempb{authoryear}
\edef\tempc{authortitle}
\edef\tempd{alphabetic}
\edef\tempe{numeric}
\edef\tempf{reading}
\ifx\tempa\tempb
  \cfr@biblatex@authorcomptrue
  \else\ifx\tempa\tempc
    \cfr@biblatex@authorcomptrue
    \else\ifx\tempa\tempd
      \cfr@biblatex@authorcomptrue
      \else\ifx\tempa\tempe
        \cfr@biblatex@authorcomptrue
        \else\ifx\tempa\tempf
          \cfr@biblatex@authorcomptrue
        \fi
      \fi
    \fi
  \fi
\fi

\ifcfr@biblatex@authorcomp

  ...

\else

  ...

\fi

It turns out that pretty much any style but verbose is fine with the redefinitions provided by moewe. But, just to be on the safe-side, I've gone for a more long-winded check against standard styles which work OK, excluding verbose, which isn't OK, and draft and debug which are special cases.