Macos – How to retrieve the absolute path of an arbitrary file from the OS X

I'm looking for a simple command that can be used within Bash to find the absolute and canonicalized path to a file on an OS X (similar to “readlink -f'` under Linux).

The following sample bash session describes a [fictitious] utility called “abspath'` that exhibits the desired behavior:

$ pwd
/Users/guyfleegman

$ ls -lR
drwxr-xr-x  4 guyfleegman  crew  136 Oct 30 02:09 foo

./foo:
-rw-r--r--  1 guyfleegman  crew  0 Oct 30 02:07 bar.txt
lrwxr-xr-x  1 guyfleegman  crew  7 Oct 30 02:09 baz.txt -> bar.txt


$ abspath .
/Users/guyfleegman

$ abspath foo
/Users/guyfleegman/foo

$ abspath ./foo/bar.txt
/Users/guyfleegman/foo/bar.txt

$ abspath foo/baz.txt
/Users/guyfleegman/foo/baz.txt

As with the last invocation of “abspath'` in the above example, I'd prefer it didn't automatically resolve symlinks, but I'm not going to be too picky here.