EndOfExe

Documentation

endOfExecutable :: String -> IO (Maybe String)

Function that is used instead of os to check whether the executable ends in .exe. The function returns IO Nothing if there is neither ys nor (ys ++ ".exe") names for executables in the variable PATH

showE :: String -> Maybe String

Function to get the proper name of the executable in the system (it must be seen in the directories in the PATH variable). You can use showE "nameOfExecutable" to get Just "nameOfExecutable" if it is present on the system. Further you can adopt it to be used inside the callCommand as the name of the executable

findSysExes :: [String] -> Maybe String

Function that being given a list of names of executables (without .exe suffix) looks up for them in the specified list order till the first existing occurrence. If there is no such occurrence (the specified executables are not installed in the directories mentioned in the variable PATH) then the function returns Nothing.