Module Filename_extended

Extensions to Core.Core_filename.

val normalize : string -> string

normalize path Removes as much "." and ".." from the path as possible. If the path is absolute they will all be removed.

val parent : string -> string

parent path The parent of the root directory is the root directory

returns

the path to the parent of path.

val make_relative : ?⁠to_:string -> string -> string

make_relative ~to_:src f returns f relative to src.

raises Failure

if is_relative f <> is_relative src

val make_absolute : string -> string

make_absolute src Turn src into an absolute path expanded from the current working directory.

val expand : ?⁠from:string -> string -> string

expand Makes a path absolute and expands ~ ~username to home directories. In case of error (e.g.: path home of a none existing user) raises Failure with a (hopefully) helpful message.

val explode : string -> string list

Splits a given path into a list of strings.

val implode : string list -> string

dual to explode

val compare : string -> string -> int

Filename.compare is a comparison that normalizes filenames ("./a" = "a"), uses a more human ready algorithm based on String_extended.collate ("rfc02.txt > rfc1.txt") and extenstions ("a.c" > "a.h").

It is a total comparison on normalized filenames.

val with_open_temp_file : ?⁠in_dir:string -> ?⁠write:(Stdlib.out_channel -> unit) -> f:(string -> 'a) -> string -> string -> 'a

with_open_temp_file ~write ~f prefix suffix create a temporary file; runs write on its out_channel and then f on the resulting file. The file is removed once f is done running.

val with_temp_dir : ?⁠in_dir:string -> string -> string -> f:(string -> 'a) -> 'a

Runs f with a temporary dir as option and removes the directory afterwards.

val is_parent : string -> string -> bool

is_parent dir1 dir2 returns true if dir1 is a parent of dir2

Note: This function is context independent, use expand if you want to consider relatives paths from a given point.

In particular:

  • A directory is always the parent of itself.
  • The root is the parent of any directory
  • An absolute path is never the parent of relative one and vice versa.
  • "../../a" is never the parent of "." even if this could be true given form the current working directory.