Phobos function to check if files are identical?

[Andrea Fontana via Digitalmars-d-learn]

On Monday, 13 March 2017 at 17:47:09 UTC, H. S. Teoh wrote:
> 	bool isEqual(string filename1, string filename2) {
> 		import std.algorithm.comparison : equal;
> 		import std.range : zip;
> 		import std.stdio : File, chunks;
>
> 		auto f1 = File(filename1);
> 		auto f2 = File(filename2);
>
> 		size_t blockSize = 4096; // or something similar
>
> 		return f1.chunks(blockSize).equal(f2.chunks(blockSize));
> 	}

First I would check if the files have different size or if they 
are the same file (same path, symlink, etc).