-- -*- coding: utf-8 -*-
--
-- ZanyBlue, an Ada library and framework for finite element analysis.
--
-- Copyright (c) 2012, 2017, Michael Rohan <mrohan@zanyblue.com>
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
--
-- * Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
--
-- * Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in the
-- documentation and/or other materials provided with the distribution.
--
-- * Neither the name of ZanyBlue nor the names of its contributors may
-- be used to endorse or promote products derived from this software
-- without specific prior written permission.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-- HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
-- TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--
-- @usage delenv name
-- @summary delete an environment variable
-- @start-doc
-- Delete an environment variable. The value of the variable, if any,
-- is restored on exiting the current scope.
--
-- Examples::
--
-- ZBTest> begin
-- ZBTest> delenv HOME
-- Deleting environment variable "HOME"
-- ZBTest> end
-- Executing the 'undo' action "setenv HOME "/home/mrohan""
-- Setting the environment variable "HOME" to "/home/mrohan"
--
-- Any commands executed after the "delenv" until the end of the scope will
-- not see a value for the environment variable.
--
with Ada.Environment_Variables;
separate (ZBTest.Commands)
procedure Delenv_Command
(State : in out State_Type;
Args : List_Type)
is
use Ada.Environment_Variables;
procedure Delenv
(State : in out State_Type;
Name : String);
-- Perform the actual environment variable deletion
------------
-- Delenv --
------------
procedure Delenv
(State : in out State_Type;
Name : String)
is
begin
if Exists (Wide_To_UTF8 (Name)) then
State.Add_Undo_Action
(Format
("setenv {0} ""{1}""", +Name, +Value (Wide_To_UTF8 (Name))));
Clear (Wide_To_UTF8 (Name));
Print_00040 (+Name);
else
Print_00039 (+Name);
end if;
end Delenv;
begin
if Length (Args) /= 2 then
raise Command_Usage_Error;
end if;
Delenv (State, Value (Args, 2));
end Delenv_Command;