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|
(**************************************************************************)
(* *)
(* Menhir *)
(* *)
(* Franois Pottier and Yann Rgis-Gianas, INRIA Rocquencourt *)
(* *)
(* Copyright 2005 Institut National de Recherche en Informatique et *)
(* en Automatique. All rights reserved. This file is distributed *)
(* under the terms of the Q Public License version 1.0, with the *)
(* change described in file LICENSE. *)
(* *)
(**************************************************************************)
(* $Id $*)
(* This module parses ocaml version and confronts it with a user-provided
version. *)
(* According to OCaml's manual, the Sys.ocaml_version value follows the
regexp [version_regexp].
*)
let mnum = "\\([0-9]+\\)"
(* version = major.minor[.patchlevel][+additional-info]. *)
let version_regexp =
Str.regexp
(Printf.sprintf "%s\\.%s\\(\\.%s\\)?\\(\\+\\(.+\\)\\)?" mnum mnum mnum)
let must field = function
| None -> failwith (Printf.sprintf "\"%s\" field is undefined." field)
| Some s -> s
let as_int s =
try
int_of_string s
with Failure _ ->
Printf.eprintf "Invalid number '%s'\n" s;
exit 1
let parse_version version =
let get i =
try
Some (Str.matched_group i version)
with Not_found ->
None
in
if Str.string_match version_regexp version 0 then (
as_int (must "major" (get 1)),
as_int (must "minor" (get 2)),
get 4, get 6
) else
begin
Printf.eprintf "Failed to retrieve ocaml version.\n";
exit 1
end
(* The user can compare its version with three different orderings:
- eq means major and minor numbers are equal ;
- eq-strict means that even the patchlevel and the additional information
are equal ;
- lt means that ocaml version is older that the user-provided version ;
- gt means that ocaml version is newer that the user-provided version. *)
let eq, eq_strict, gt, lt = ref false, ref false, ref false, ref false
let verbose = ref false
let options = Arg.align
[
"--eq", Arg.Set eq, " Is the version equal to <version> ?";
"--eq-strict", Arg.Set eq_strict,
" Is the version strictly equal to <version> ? \
(taking into account patchlevel and additional information)";
"--gt", Arg.Set gt, " Is the version newer than <version> ? (default)";
"--lt", Arg.Set lt, " Is the version older than <version> ?";
"--verbose", Arg.Set verbose, " Show version."
]
let usage = "check-ocaml-version [options] <version>\n"
let version = ref None
let set_version s =
version := Some s
let _ =
Arg.parse options set_version usage
let compare, compare_str, strict =
match !eq, !gt, !lt with
| true, false, false -> ( = ) , "", !eq_strict
| false, true, false -> ( >= ), "or greater ", false
| false, false, true -> ( <= ), "or lesser ", false
| false, false, false -> (Printf.printf "%s\n%!" Sys.ocaml_version; exit 1)
| _ -> failwith "(eq|gt|lt) flags must be used independently"
let compare_version (major, minor, p, a) (major', minor', p', a') =
if major = major' then
if minor = minor' then
if strict then
(p = p') && (a = a')
else true
else compare minor minor'
else
compare major major'
let _ =
match !version with
| None ->
Printf.printf "%s\n%!" Sys.ocaml_version
| Some version ->
let ov = parse_version Sys.ocaml_version
and uv = parse_version version in
if compare_version ov uv then begin
if !verbose then
Printf.printf "Version %s is OK.\n%!" Sys.ocaml_version;
exit 0
end
else begin
if !verbose then
Printf.printf "%s is NOT OK: version %s %swas required.%!\n" Sys.ocaml_version version compare_str;
exit 1
end
|
