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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(* Files and load path. *)
type physical_path = string
type load_path = physical_path list
let physical_path_of_string s = s
let string_of_physical_path p = p
let path_to_list p =
let sep = Str.regexp (if Sys.os_type = "Win32" then ";" else ":") in
Str.split sep p
(* Some static definitions concerning filenames *)
let dirsep = Filename.dir_sep (* Unix: "/" *)
let dirsep_len = String.length dirsep
let curdir = Filename.concat Filename.current_dir_name "" (* Unix: "./" *)
let curdir_len = String.length curdir
(* Hints to partially detects if two paths refer to the same directory *)
(** cut path [p] after all the [/] that come at position [pos]. *)
let rec cut_after_dirsep p pos =
if CString.is_sub dirsep p pos then
cut_after_dirsep p (pos + dirsep_len)
else
String.sub p pos (String.length p - pos)
(** remove all initial "./" in a path unless the path is exactly "./" *)
let rec remove_path_dot p =
if CString.is_sub curdir p 0 then
if String.length p = curdir_len
then Filename.current_dir_name
else remove_path_dot (cut_after_dirsep p curdir_len)
else
p
(** If a path [p] starts with the current directory $PWD then
[strip_path p] returns the sub-path relative to $PWD.
Any leading "./" are also removed from the result. *)
let strip_path p =
let cwd = Filename.concat (Sys.getcwd ()) "" in (* Unix: "`pwd`/" *)
if CString.is_sub cwd p 0 then
remove_path_dot (cut_after_dirsep p (String.length cwd))
else
remove_path_dot p
let canonical_path_name p =
let current = Sys.getcwd () in
try
Sys.chdir p;
let p' = Sys.getcwd () in
Sys.chdir current;
p'
with Sys_error _ ->
(* We give up to find a canonical name and just simplify it... *)
strip_path p
let make_suffix name suffix =
if Filename.check_suffix name suffix then name else (name ^ suffix)
let get_extension f =
let pos = try String.rindex f '.' with Not_found -> String.length f in
String.sub f pos (String.length f - pos)
let correct_path f dir =
if Filename.is_relative f then Filename.concat dir f else f
let file_readable_p name =
try Unix.access name [Unix.R_OK];true
with Unix.Unix_error (_, _, _) -> false
(* As for [Unix.close_process], a [Unix.waipid] that ignores all [EINTR] *)
let rec waitpid_non_intr pid =
try snd (Unix.waitpid [] pid)
with Unix.Unix_error (Unix.EINTR, _, _) -> waitpid_non_intr pid
(** [run_command com] launches command [com] (via /bin/sh),
and returns the contents of stdout and stderr. If given, [~hook]
is called on each elements read on stdout or stderr. *)
let run_command ?(hook=(fun _ ->())) c =
let result = Buffer.create 127 in
let cin,cout,cerr = Unix.open_process_full c (Unix.environment ()) in
let buff = String.make 127 ' ' in
let buffe = String.make 127 ' ' in
let n = ref 0 in
let ne = ref 0 in
while n:= input cin buff 0 127 ; ne := input cerr buffe 0 127 ;
!n+ !ne <> 0
do
let r = String.sub buff 0 !n in (hook r; Buffer.add_string result r);
let r = String.sub buffe 0 !ne in (hook r; Buffer.add_string result r);
done;
(Unix.close_process_full (cin,cout,cerr), Buffer.contents result)
(** [sys_command] launches program [prog] with arguments [args].
It behaves like [Sys.command], except that we rely on
[Unix.create_process], it's hardly more complex and avoids dealing
with shells. In particular, no need to quote arguments
(against whitespace or other funny chars in paths), hence no need
to care about the different quoting conventions of /bin/sh and cmd.exe. *)
let sys_command prog args =
let argv = Array.of_list (prog::args) in
let pid = Unix.create_process prog argv Unix.stdin Unix.stdout Unix.stderr in
waitpid_non_intr pid
(*
checks if two file names refer to the same (existing) file by
comparing their device and inode.
It seems that under Windows, inode is always 0, so we cannot
accurately check if
*)
(* Optimised for partial application (in case many candidates must be
compared to f1). *)
let same_file f1 =
try
let s1 = Unix.stat f1 in
(fun f2 ->
try
let s2 = Unix.stat f2 in
s1.Unix.st_dev = s2.Unix.st_dev &&
if Sys.os_type = "Win32" then f1 = f2
else s1.Unix.st_ino = s2.Unix.st_ino
with
Unix.Unix_error _ -> false)
with
Unix.Unix_error _ -> (fun _ -> false)
|
