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220 | ------------------------------------------------------------------------------
-- Language Server Protocol --
-- --
-- Copyright (C) 2018, AdaCore --
-- --
-- This is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. This software is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public --
-- License for more details. You should have received a copy of the GNU --
-- General Public License distributed with this software; see file --
-- COPYING3. If not, go to http://www.gnu.org/licenses for a complete copy --
-- of the license. --
------------------------------------------------------------------------------
-- This is a test for Process API.
--
-- When it's called with no arguments, then it starts the same executable
-- with some arguments and pass some data to stdin. Then it waits for
-- the termination and checks stdout/stderr streams and exit status.
--
-- If it's launched with some arguments, then it enumerates arguments to the
-- stdout stream, echos one string from stdin to stderr and exits.
with Ada.Command_Line;
with Ada.Directories;
with Ada.Text_IO;
with Ada.Streams;
with Ada.Strings.Unbounded;
with Spawn.Processes;
with Spawn.Processes.Monitor_Loop;
with Spawn.String_Vectors;
procedure Spawn_Test is
pragma Assertion_Policy (Check);
P : Spawn.Processes.Process;
package Listeners is
type Listener is new Spawn.Processes.Process_Listener with record
Stdin : Ada.Strings.Unbounded.Unbounded_String;
Stdout : Ada.Strings.Unbounded.Unbounded_String;
Stderr : Ada.Strings.Unbounded.Unbounded_String;
Started : Boolean := False;
Stopped : Boolean := False;
Error : Integer := 0;
end record;
overriding procedure Standard_Output_Available
(Self : in out Listener);
overriding procedure Standard_Error_Available
(Self : in out Listener);
overriding procedure Standard_Input_Available
(Self : in out Listener);
-- Called once when it's possible to write data again.
overriding procedure Started (Self : in out Listener);
overriding procedure Finished
(Self : in out Listener;
Exit_Code : Integer);
overriding procedure Error_Occurred
(Self : in out Listener;
Process_Error : Integer);
end Listeners;
package body Listeners is
overriding procedure Standard_Output_Available
(Self : in out Listener)
is
use type Ada.Streams.Stream_Element_Count;
begin
loop
declare
Data : Ada.Streams.Stream_Element_Array (1 .. 5);
Last : Ada.Streams.Stream_Element_Count;
begin
P.Read_Standard_Output (Data, Last);
exit when Last < Data'First;
for Char of Data (1 .. Last) loop
if Char not in 16#0D# | 16#0A# then
Ada.Strings.Unbounded.Append
(Self.Stdout, Character'Val (Char));
end if;
end loop;
end;
end loop;
end Standard_Output_Available;
overriding procedure Standard_Error_Available
(Self : in out Listener)
is
use type Ada.Streams.Stream_Element_Count;
begin
loop
declare
Data : Ada.Streams.Stream_Element_Array (1 .. 5);
Last : Ada.Streams.Stream_Element_Count;
begin
P.Read_Standard_Error (Data, Last);
exit when Last < Data'First;
for Char of Data (1 .. Last) loop
if Char not in 16#0D# | 16#0A# then
Ada.Strings.Unbounded.Append
(Self.Stderr, Character'Val (Char));
end if;
end loop;
end;
end loop;
end Standard_Error_Available;
overriding procedure Standard_Input_Available
(Self : in out Listener)
is
use type Ada.Streams.Stream_Element_Count;
Text : constant String :=
Ada.Strings.Unbounded.To_String (Self.Stdin);
Last : Ada.Streams.Stream_Element_Count := Text'Length;
Data : Ada.Streams.Stream_Element_Array (1 .. Last);
begin
for J in Data'Range loop
Data (J) := Character'Pos (Text (Positive (J)));
end loop;
P.Write_Standard_Input (Data, Last);
pragma Assert (Last = Data'Last);
Self.Stdin := Ada.Strings.Unbounded.Null_Unbounded_String;
P.Close_Standard_Input;
end Standard_Input_Available;
overriding procedure Started (Self : in out Listener) is
begin
Self.Started := True;
end Started;
overriding procedure Finished
(Self : in out Listener;
Exit_Code : Integer) is
begin
if Exit_Code /= 0 then
Ada.Text_IO.Put_Line ("Unexpected exit code" & (Exit_Code'Img));
Ada.Command_Line.Set_Exit_Status (Ada.Command_Line.Failure);
end if;
Self.Stopped := True;
end Finished;
overriding procedure Error_Occurred
(Self : in out Listener;
Process_Error : Integer)
is
pragma Unreferenced (Self);
begin
Ada.Text_IO.Put_Line ("Error_Occurred:" & (Process_Error'Img));
Ada.Command_Line.Set_Exit_Status (Ada.Command_Line.Failure);
Self.Stopped := True;
end Error_Occurred;
end Listeners;
Command : constant String := Ada.Directories.Full_Name
(Ada.Command_Line.Command_Name);
Args : Spawn.String_Vectors.UTF_8_String_Vector;
L : aliased Listeners.Listener;
begin
if Ada.Command_Line.Argument_Count > 0 then
-- Work as a driven process.
for J in 1 .. Ada.Command_Line.Argument_Count loop
Ada.Text_IO.Put (Positive'Image (J));
Ada.Text_IO.Put (" => ");
Ada.Text_IO.Put_Line (Ada.Command_Line.Argument (J));
end loop;
Ada.Text_IO.Put_Line (Ada.Text_IO.Standard_Error, Ada.Text_IO.Get_Line);
return;
end if;
-- Otherwise launch a driven process.
L.Stdin := Ada.Strings.Unbounded.To_Unbounded_String ("Stdin sample");
Args.Append ("Hello_World");
Args.Append ("space> <space");
P.Set_Program (Command);
P.Set_Arguments (Args);
P.Set_Working_Directory (Ada.Directories.Current_Directory);
P.Set_Listener (L'Unchecked_Access);
P.Start;
while not L.Stopped loop
Spawn.Processes.Monitor_Loop (1);
end loop;
declare
Stdin : constant String := Ada.Strings.Unbounded.To_String (L.Stdin);
Stdout : constant String := Ada.Strings.Unbounded.To_String (L.Stdout);
Stderr : constant String := Ada.Strings.Unbounded.To_String (L.Stderr);
begin
pragma Assert (Stdin = "");
pragma Assert (Stderr = "Stdin sample");
pragma Assert (Stdout = " 1 => Hello_World 2 => space> <space");
pragma Assert (L.Started);
pragma Assert (L.Error = 0);
end;
end Spawn_Test;
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