gistfile1.txt

➜  ~  wget https://raw.github.com/mauke/poly.poly/master/poly.poly
➜  ~  zsh poly.poly 
I'm a zsh script.
➜  ~  bash poly.poly 
I'm a bash script.
➜  ~  python poly.poly
I'm a Python program (CPython 2.7.5).
➜  ~  ruby poly.poly 
I'm a Ruby program.
➜  ~  make -f poly.poly 
I'm a Makefile.
➜  ~  perl poly.poly
I'm a Perl program.
➜  ~  sh poly.poly 
I'm a bash script.
➜  ~  runhaskell poly.poly 

poly.poly:1:2: parse error on input `#'
➜  ~  mv poly.poly poly.lhs
➜  ~  runhaskell poly.lhs 

poly.lhs:68:27: parse error on input `:'
➜  ~  mv poly.lhs poly.c
➜  ~  gcc poly.c 
poly.c:37:20: warning: trigraph ??! ignored, use -trigraphs to enable
➜  ~  ./a.out 
I'm a C program (C89 with // comments, trigraphs disabled).
➜  ~  mv poly.c poly.cpp
➜  ~  g++ poly.cpp 
poly.cpp:37:20: warning: trigraph ??! ignored, use -trigraphs to enable
➜  ~  ./a.out 
I'm a C++ program (trigraphs disabled).
➜  ~