@node Path Utilities
@section Path Utilities

Provided by the module @code{(hnh util path)}.

See also @code{absolute-file-name?} from Guile.

@defun path-append strings ...
Joins all strings into a path, squeezing duplicated delimiters, but
ensuring that all delimiters that are needed are there.

Note that delimiters embedded inside the string, which aren't first or
last in a substring (or are the only thing in a string) are
kept. Meaning that
@example
(path-append "/" "hello") ⇒ "/hello"
(path-append "/usr/local/bin" "cmd") ⇒ "/usr/local/bin/cmd"
@end example
@end defun


@defun path-join lst
@lisp
(apply path-append lst)
@end lisp
@end defun


@defun path-split path
Splits path into a list of components.
The first component will be @code{""} if path is absolute.
@end defun


@defun filename-extension filename
Returns the extension of the filename, or the empty string if none exists.
@end defun

@defun realpath path
Equivalent of realpath(3). Absolute file names are returned as is,
while relative filenames gets expanded to absolute filenames.
@end defun