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1037 | with Ada.Command_Line;
with Ada.Exceptions;
with GNAT.OS_Lib;
with GNAT.Strings;
with Ada.Containers.Hashed_Maps;
with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;
with Ada.Strings.Unbounded.Hash;
with AAA.Table_IO;
with AAA.Text_IO;
with CLIC.Config.Info;
with CLIC.Command_Line; use CLIC.Command_Line;
package body CLIC.Subcommand.Instance is
package Command_Maps is new Ada.Containers.Hashed_Maps
(Key_Type => Ada.Strings.Unbounded.Unbounded_String,
Element_Type => Command_Access,
Hash => Ada.Strings.Unbounded.Hash,
Equivalent_Keys => Ada.Strings.Unbounded."=");
package Topic_Maps is new Ada.Containers.Hashed_Maps
(Key_Type => Ada.Strings.Unbounded.Unbounded_String,
Element_Type => Help_Topic_Access,
Hash => Ada.Strings.Unbounded.Hash,
Equivalent_Keys => Ada.Strings.Unbounded."=");
package Group_Maps is new Ada.Containers.Hashed_Maps
(Key_Type => Ada.Strings.Unbounded.Unbounded_String,
Element_Type => AAA.Strings.Vector,
"=" => AAA.Strings."=",
Hash => Ada.Strings.Unbounded.Hash,
Equivalent_Keys => Ada.Strings.Unbounded."=");
package Alias_Maps is new Ada.Containers.Hashed_Maps
(Key_Type => Ada.Strings.Unbounded.Unbounded_String,
Element_Type => AAA.Strings.Vector,
"=" => AAA.Strings."=",
Hash => Ada.Strings.Unbounded.Hash,
Equivalent_Keys => Ada.Strings.Unbounded."=");
Registered_Commands : Command_Maps.Map;
-- A map of commands based on their names
Registered_Topics : Topic_Maps.Map;
-- A map of topics based on their names
Registered_Groups : Group_Maps.Map;
-- A map of list of commands based on their group names
Registered_Aliases : Alias_Maps.Map;
-- A map of aliases and their replacement args
Not_In_A_Group : AAA.Strings.Vector;
-- List of commands that are not in a group
Global_Arguments : AAA.Strings.Vector;
-- Vector of arguments for the global command, the first one should be the
-- command name, otherwise there is an invalid global switch on the command
-- line.
Help_Requested : Boolean;
Global_Config : Switches_Configuration;
Global_Parsing_Done : Boolean := False;
procedure Display_Options
(Config : Switches_Configuration;
Title : String);
procedure Display_Global_Options;
function Highlight_Switches (Line : String) return String;
function What_Command (Str : String := "") return not null Command_Access;
procedure Put_Line_For_Access (Str : String);
function To_Argument_List (V : AAA.Strings.Vector)
return GNAT.OS_Lib.Argument_List_Access;
function To_Vector (List : GNAT.OS_Lib.Argument_List_Access)
return AAA.Strings.Vector;
procedure Process_Aliases
with Pre => not Global_Arguments.Is_Empty;
procedure Split_At_Double_Dash (Args : AAA.Strings.Vector;
Before, After : out AAA.Strings.Vector)
with Post => (if not Args.Contains ("--") then Before."=" (Args))
and then
not Before.Contains ("--");
-- Split a vector of command line arguments, everything before a potential
-- first "--" (double dash) is added to the Before output, the arguments
-- after the "--" are added to the After output. The first "--" is not
-- added to either the Before or After output.
--
-- When there is no "--" argument, Before is equal to Args.
--------------------------
-- Split_At_Double_Dash --
--------------------------
procedure Split_At_Double_Dash (Args : AAA.Strings.Vector;
Before, After : out AAA.Strings.Vector)
is
Before_Double_Dash : Boolean := True;
begin
for Elt of Args loop
if Before_Double_Dash then
if Elt = "--" then
Before_Double_Dash := False;
else
Before.Append (Elt);
end if;
else
After.Append (Elt);
end if;
end loop;
end Split_At_Double_Dash;
-------------------------
-- Put_Line_For_Access --
-------------------------
procedure Put_Line_For_Access (Str : String) is
begin
Put_Line (Str);
end Put_Line_For_Access;
----------------------
-- To_Argument_List --
----------------------
function To_Argument_List (V : AAA.Strings.Vector)
return GNAT.OS_Lib.Argument_List_Access
is
List : constant GNAT.OS_Lib.Argument_List_Access :=
new GNAT.Strings.String_List (1 .. V.Count);
begin
for Index in List.all'Range loop
List (Index) := new String'(V (Index));
end loop;
return List;
end To_Argument_List;
---------------
-- To_Vector --
---------------
function To_Vector (List : GNAT.OS_Lib.Argument_List_Access)
return AAA.Strings.Vector
is
use GNAT.OS_Lib;
Result : AAA.Strings.Vector;
begin
if List /= null then
for Elt of List.all loop
if Elt /= null then
Result.Append (Elt.all);
end if;
end loop;
end if;
return Result;
end To_Vector;
--------------
-- Register --
--------------
procedure Register (Cmd : not null Command_Access) is
Name : constant Unbounded_String := To_Unbounded_String (Cmd.Name);
begin
if Registered_Commands.Contains (Name) then
raise Command_Already_Defined with Cmd.Name;
else
-- Register the command
Registered_Commands.Insert (Name, Cmd);
-- This command is not in a group
Not_In_A_Group.Append (Cmd.Name);
end if;
end Register;
--------------
-- Register --
--------------
procedure Register (Group : String; Cmd : not null Command_Access) is
Name : constant Unbounded_String := To_Unbounded_String (Cmd.Name);
Ugroup : constant Unbounded_String := To_Unbounded_String (Group);
begin
if Registered_Commands.Contains (Name) then
raise Command_Already_Defined with Cmd.Name;
else
-- Register the command
Registered_Commands.Insert (Name, Cmd);
-- Create the group if it doesn't exist yet
if not Registered_Groups.Contains (Ugroup) then
Registered_Groups.Insert (Ugroup, AAA.Strings.Empty_Vector);
end if;
-- Add this command to the list of commands for the group
Registered_Groups.Reference (Ugroup).Append (Cmd.Name);
end if;
end Register;
--------------
-- Register --
--------------
procedure Register (Topic : not null Help_Topic_Access) is
Name : constant Unbounded_String := To_Unbounded_String (Topic.Name);
begin
if Registered_Topics.Contains (Name) then
raise Program_Error;
else
Registered_Topics.Insert (Name, Topic);
end if;
end Register;
---------------
-- Set_Alias --
---------------
procedure Set_Alias (Alias : Identifier; Replacement : AAA.Strings.Vector)
is
Name : constant Unbounded_String := To_Unbounded_String (Alias);
begin
Registered_Aliases.Include (Name, Replacement);
end Set_Alias;
------------------
-- Load_Aliases --
------------------
procedure Load_Aliases (Conf : CLIC.Config.Instance;
Root_Key : String := "alias")
is
Keys : constant AAA.Strings.Vector :=
CLIC.Config.Info.List_Keys (Conf, "^" & Root_Key & "\.[^.]+$");
begin
for Key of Keys loop
declare
Alias : constant String := AAA.Strings.Tail (Key, '.');
Value : constant String := Conf.Get (Key, Default => "");
List : GNAT.OS_Lib.String_List_Access
:= GNAT.OS_Lib.Argument_String_To_List (Value);
begin
if Value /= "" then
Set_Alias (Alias, To_Vector (List));
end if;
GNAT.OS_Lib.Free (List);
end;
end loop;
end Load_Aliases;
------------------
-- What_Command --
------------------
function What_Command (Str : String := "") return not null Command_Access is
Name : constant Unbounded_String :=
To_Unbounded_String (if Str = "" then What_Command else Str);
begin
if Registered_Commands.Contains (Name) then
return Registered_Commands.Element (Name);
else
raise Error_No_Command;
end if;
end What_Command;
------------------
-- What_Command --
------------------
function What_Command return String is
begin
if Global_Arguments.Is_Empty
or else
AAA.Strings.Has_Prefix (Global_Arguments.First_Element, "-")
then
raise Error_No_Command;
else
return Global_Arguments.First_Element;
end if;
end What_Command;
----------------------------
-- Display_Valid_Commands --
----------------------------
procedure Display_Valid_Commands is
use Command_Maps;
use Group_Maps;
Tab : constant String (1 .. 1) := (others => ' ');
Table : AAA.Table_IO.Table;
-----------------
-- Add_Command --
-----------------
procedure Add_Command (Cmd : not null Command_Access) is
begin
Table.New_Row;
Table.Append (Tab);
Table.Append (TTY_Description (Cmd.Name));
Table.Append (Tab);
Table.Append (Cmd.Short_Description);
end Add_Command;
First_Group : Boolean := Not_In_A_Group.Is_Empty;
begin
if Registered_Commands.Is_Empty then
return;
end if;
Put_Line ("");
Put_Line (TTY_Chapter ("COMMANDS"));
for Name of Not_In_A_Group loop
Add_Command (Registered_Commands (To_Unbounded_String (Name)));
end loop;
for Iter in Registered_Groups.Iterate loop
if not First_Group then
Table.New_Row;
Table.Append (Tab);
else
First_Group := False;
end if;
declare
Group : constant String := To_String (Key (Iter));
begin
Table.New_Row;
Table.Append (Tab);
Table.Append (TTY_Underline (Group));
for Name of Element (Iter) loop
Add_Command (Registered_Commands (To_Unbounded_String (Name)));
end loop;
end;
end loop;
Table.Print (Separator => " ", Put_Line => Put_Line_For_Access'Access);
end Display_Valid_Commands;
--------------------------
-- Display_Valid_Topics --
--------------------------
procedure Display_Valid_Topics is
Tab : constant String (1 .. 1) := (others => ' ');
Table : AAA.Table_IO.Table;
use Topic_Maps;
begin
if Registered_Topics.Is_Empty then
return;
end if;
Put_Line ("");
Put_Line (TTY_Chapter ("TOPICS"));
for Elt in Registered_Topics.Iterate loop
Table.New_Row;
Table.Append (Tab);
Table.Append (TTY_Description (To_String (Key (Elt))));
Table.Append (Tab);
Table.Append (Element (Elt).Title);
end loop;
Table.Print (Separator => " ", Put_Line => Put_Line_For_Access'Access);
end Display_Valid_Topics;
---------------------
-- Display_Aliases --
---------------------
procedure Display_Aliases is
Tab : constant String (1 .. 1) := (others => ' ');
Table : AAA.Table_IO.Table;
use Alias_Maps;
begin
if Registered_Aliases.Is_Empty then
return;
end if;
Put_Line (TTY_Chapter ("ALIASES"));
for Elt in Registered_Aliases.Iterate loop
Table.New_Row;
Table.Append (Tab);
Table.Append (TTY_Description (To_String (Key (Elt))));
Table.Append (Tab);
Table.Append (Element (Elt).Flatten);
end loop;
Table.Print (Separator => " ", Put_Line => Put_Line_For_Access'Access);
end Display_Aliases;
-------------------
-- Display_Usage --
-------------------
procedure Display_Usage (Cmd : not null Command_Access) is
Config : Switches_Configuration;
Canary1 : Switches_Configuration;
Canary2 : Switches_Configuration;
begin
Put_Line (TTY_Chapter ("SUMMARY"));
Put_Line (" " & Cmd.Short_Description);
Put_Line ("");
Put_Line (TTY_Chapter ("USAGE"));
Put (" ");
Put_Line
(TTY_Underline (Main_Command_Name) &
" " &
TTY_Underline (Cmd.Name) &
" [options] " &
Cmd.Usage_Custom_Parameters);
-- We use the following two canaries to detect if a command is adding
-- its own switches, in which case we need to show their specific help.
Set_Global_Switches (Canary1); -- For comparison
Set_Global_Switches (Canary2); -- For comparison
Cmd.Setup_Switches (Canary1);
if Get_Switches (Canary1.GNAT_Cfg) /= Get_Switches (Canary2.GNAT_Cfg)
then
Cmd.Setup_Switches (Config);
end if;
-- Without the following line, GNAT.Display_Help causes a segfault for
-- reasons I'm unable to pinpoint. This way it prints a harmless blank
-- line that we want anyway.
Define_Switch (Config, " ", " ", " ", " ", " ");
Display_Options (Config, "OPTIONS");
Display_Global_Options;
-- Format and print the long command description
Put_Line ("");
Put_Line (TTY_Chapter ("DESCRIPTION"));
for Line of Cmd.Long_Description loop
AAA.Text_IO.Put_Paragraph (Highlight_Switches (Line),
Line_Prefix => " ");
-- GNATCOLL.Paragraph_Filling seems buggy at the moment, otherwise
-- it would be the logical choice.
end loop;
end Display_Usage;
-------------------
-- Display_Usage --
-------------------
procedure Display_Usage (Displayed_Error : Boolean := False) is
begin
if not Displayed_Error then
Put_Line (Main_Command_Name & " " & TTY_Version (Version));
Put_Line ("");
end if;
Put_Line (TTY_Chapter ("USAGE"));
Put_Line (" " & TTY_Underline (Main_Command_Name) &
" [global options] " &
"<command> [command options] [<arguments>]");
Put_Line ("");
Put_Line (" " & TTY_Underline (Main_Command_Name) & " " &
TTY_Underline ("help") &
" [<command>|<topic>]");
Put_Line ("");
Put_Line (TTY_Chapter ("ARGUMENTS"));
declare
Tab : constant String (1 .. 1) := (others => ' ');
Table : AAA.Table_IO.Table;
begin
Table.New_Row;
Table.Append (Tab);
Table.Append (TTY_Description ("<command>"));
Table.Append ("Command to execute");
Table.New_Row;
Table.Append (Tab);
Table.Append (TTY_Description ("<arguments>"));
Table.Append ("List of arguments for the command");
Table.Print (Separator => " ",
Put_Line => Put_Line_For_Access'Access);
end;
Display_Global_Options;
Display_Valid_Commands;
Display_Valid_Topics;
Display_Aliases;
end Display_Usage;
---------------------------
-- Parse_Global_Switches --
---------------------------
procedure Parse_Global_Switches
(Command_Line : AAA.Strings.Vector := AAA.Strings.Empty_Vector)
is
----------------------
-- Ada_Command_Line --
----------------------
function Ada_Command_Line return AAA.Strings.Vector is
use Ada.Command_Line;
Result : AAA.Strings.Vector;
begin
for I in 1 .. Argument_Count loop
Result.Append (Ada.Command_Line.Argument (I));
end loop;
return Result;
end Ada_Command_Line;
----------------------
-- Filter_Arguments --
----------------------
function Filter_Arguments return GNAT.OS_Lib.Argument_List_Access is
Arguments : AAA.Strings.Vector;
Cmd_Line : constant AAA.Strings.Vector :=
(if Command_Line.Is_Empty then Ada_Command_Line else Command_Line);
begin
-- GNAT switch handling intercepts -h/--help. To have the same output
-- for '<main> -h command' and '<main> help command', we do manual
for Arg of Cmd_Line loop
if Arg not in "-h" | "--help" then
Arguments.Append (Arg);
else
Help_Requested := True;
end if;
end loop;
return To_Argument_List (Arguments);
end Filter_Arguments;
Arguments : GNAT.OS_Lib.Argument_List_Access;
Parser : Opt_Parser;
begin
-- Only do the global parsing once
if Global_Parsing_Done and then Command_Line.Is_Empty then
return;
else
Global_Arguments.Clear;
Help_Requested := False;
Clear (Global_Config);
Global_Parsing_Done := True;
end if;
-- We filter the command line arguments to remove -h/--help that would
-- trigger the Getopt automatic help system.
Arguments := Filter_Arguments;
Set_Global_Switches (Global_Config);
-- Run the parser first with only the global switches. With the
-- Stop_At_First_Non_Switch => True the parser will stop at the first
-- argument, witch is supposed to be a sub-command, topic, or alias.
-- The rest of the command line args are added to the Global_Arguments.
Initialize_Option_Scan (Parser,
Arguments,
Stop_At_First_Non_Switch => True);
Getopt (Global_Config.GNAT_Cfg,
Parser => Parser,
Quiet => True);
-- Make a vector of arguments starting from the first non switch
loop
declare
Arg : constant String :=
CLIC.Command_Line.Get_Argument (Parser => Parser);
begin
exit when Arg = "";
Global_Arguments.Append (Arg);
end;
end loop;
GNAT.OS_Lib.Free (Arguments);
-- At this point the command and all unknown switches are in
-- Global_Arguments.
exception
-- Getopt should never raise Exit_From_Command_Line because we filtered
-- the -h/--help switches from the command line.
when E : Invalid_Switch | Invalid_Parameter =>
Put_Error (Ada.Exceptions.Exception_Message (E) &
" (global).");
Put_Error ("try """ & Main_Command_Name &
" --help"" for more information.");
Error_Exit (1);
end Parse_Global_Switches;
---------------------
-- Process_Aliases --
---------------------
procedure Process_Aliases is
Name : constant String := Global_Arguments.First_Element;
Uname : constant Unbounded_String := To_Unbounded_String (Name);
begin
-- If we have a valid alias
if Registered_Aliases.Contains (Uname) then
-- Remove the alias from the arguments
Global_Arguments.Delete_First;
-- And replace it by the alias value
Global_Arguments.Prepend (Registered_Aliases (Uname));
end if;
end Process_Aliases;
-------------
-- Execute --
-------------
procedure Execute
(Command_Line : AAA.Strings.Vector := AAA.Strings.Empty_Vector)
is
Parser : Opt_Parser;
-- Subcommand parser, declared here so it is available to the exception
-- handler below.
begin
Parse_Global_Switches (Command_Line);
if Global_Arguments.Is_Empty then
-- We should at least have the sub-command name in the arguments
Display_Usage;
Error_Exit (1);
elsif Help_Requested then
Display_Help (Global_Arguments.First_Element);
Error_Exit (0);
end if;
-- Take care of a potential alias
Process_Aliases;
-- Dispatch to the appropriate command
declare
Cmd : constant not null Command_Access := What_Command;
-- Might raise if invalid, if so we are done
Command_Config : Switches_Configuration;
Sub_Cmd_Line : GNAT.OS_Lib.String_List_Access;
To_Parse, Sub_Arguments : AAA.Strings.Vector;
begin
-- Add command specific switches to the config. We don't need the
-- global switches because they have been parsed before.
Cmd.Setup_Switches (Command_Config);
case Cmd.Switch_Parsing is
when Parse_All =>
-- Parse all global arguments
To_Parse := Global_Arguments;
Sub_Arguments := AAA.Strings.Empty_Vector;
when Before_Double_Dash =>
-- Only parse the arguments before a potential "--"
Split_At_Double_Dash (Global_Arguments,
Before => To_Parse,
After => Sub_Arguments);
when All_As_Args =>
-- Skip all sub-command switch parsing
To_Parse := AAA.Strings.Empty_Vector;
Sub_Arguments := Global_Arguments;
end case;
if not To_Parse.Is_Empty then
-- Make a new command line argument list from the remaining
-- arguments and switches after global parsing.
Sub_Cmd_Line := To_Argument_List (To_Parse);
-- Initialize a new switch parser that will only see the new
-- sub-command line (i.e. the remaining args and switches after
-- global parsing).
Initialize_Option_Scan (Parser, Sub_Cmd_Line);
-- Parse sub-command line, invalid switches will raise an
-- exception
Getopt (Command_Config.GNAT_Cfg,
Parser => Parser,
Quiet => True);
-- Make a vector of arguments for the sub-command (every element
-- that was not a switch in the sub-command line).
declare
Args_After_Parsing : AAA.Strings.Vector;
begin
loop
declare
Arg : constant String :=
CLIC.Command_Line.Get_Argument (Parser => Parser);
begin
exit when Arg = "";
Args_After_Parsing.Append (Arg);
end;
end loop;
Sub_Arguments.Prepend (Args_After_Parsing);
end;
-- We don't need this anymore
GNAT.OS_Lib.Free (Sub_Cmd_Line);
end if;
pragma Assert (not Sub_Arguments.Is_Empty,
"Should have at least the command name");
-- Remove the sub-command name from the list
Sub_Arguments.Delete_First;
Cmd.Execute (Sub_Arguments);
end;
exception
-- Getopt should never raise Exit_From_Command_Line because we filtered
-- the -h/--help switches from the command line.
when E : Invalid_Switch | Invalid_Parameter =>
Put_Error (Ada.Exceptions.Exception_Message (E) &
" (command/topic """ &
What_Command & """).");
Put_Error ("try """ & Main_Command_Name &
" help " & What_Command & """ for more information.");
if Is_Global_Switch (Full_Switch (Parser)) then
Put_Line ("Option '" & Full_Switch (Parser)
& "' is a valid global option, to use it as such please"
& " give it before the subcommand.");
end if;
Error_Exit (1);
when Error_No_Command =>
Put_Error ("Unrecognized command: " & Global_Arguments.First_Element);
Put_Line ("");
Display_Usage (Displayed_Error => True);
Error_Exit (1);
end Execute;
------------------------
-- Highlight_Switches --
------------------------
function Highlight_Switches (Line : String) return String is
use AAA.Strings.Vectors;
use AAA.Strings;
---------------
-- Highlight --
---------------
-- Avoid highlighting non-alphanumeric characters
function Highlight (Word : String) return String is
subtype Valid_Chars is Character with
Dynamic_Predicate => Valid_Chars in '0' .. '9' | 'a' .. 'z';
I : Natural := Word'Last; -- last char to highlight
begin
while I >= Word'First and then Word (I) not in Valid_Chars loop
I := I - 1;
end loop;
return TTY_Emph (Word (Word'First .. I)) & Word (I + 1 .. Word'Last);
end Highlight;
Words : AAA.Strings.Vector := AAA.Strings.Split (Line, Separator => ' ');
I, J : Vectors.Cursor;
begin
I := Words.First;
while Has_Element (I) loop
declare
Word : constant String := Element (I);
begin
J := Next (I);
if Has_Prefix (Word, "--") and then Word'Length > 2
then
Words.Insert (Before => J, New_Item => Highlight (Word));
Words.Delete (I);
end if;
I := J;
end;
end loop;
return Flatten (Words);
end Highlight_Switches;
---------------------
-- Display_Options --
---------------------
procedure Display_Options
(Config : Switches_Configuration;
Title : String)
is
Tab : constant String (1 .. 1) := (others => ' ');
Table : AAA.Table_IO.Table;
Has_Printable_Rows : Boolean := False;
-----------------
-- Without_Arg --
-----------------
function Without_Arg (Value : String) return String is
Required_Character : constant Character := Value (Value'Last);
begin
return
(if Required_Character in '=' | ':' | '!' | '?' then
Value (Value'First .. Value'Last - 1)
else
Value);
end Without_Arg;
--------------
-- With_Arg --
--------------
function With_Arg (Value, Arg : String) return String is
Required_Character : constant Character := Value (Value'Last);
begin
return
(if Required_Character in '=' | ':' | '!' | '?' then
AAA.Strings.Replace
(Value,
"" & Required_Character,
(case Required_Character is
when '=' => "=" & Arg,
when ':' => "[ ] " & Arg,
when '!' => Arg,
when '?' => "[" & Arg & "]",
when others => raise Program_Error))
else Value);
end With_Arg;
---------------
-- Print_Row --
---------------
procedure Print_Row (Short_Switch, Long_Switch, Arg, Help : String) is
Has_Short : constant Boolean := Short_Switch not in " " | "";
Has_Long : constant Boolean := Long_Switch not in " " | "";
begin
if not Has_Short and then not Has_Long then
return;
end if;
Table.New_Row;
Table.Append (Tab);
if Has_Short and Has_Long then
Table.Append (TTY_Description (Without_Arg (Short_Switch)) &
" (" & With_Arg (Long_Switch, Arg) & ")");
elsif not Has_Short and Has_Long then
Table.Append (TTY_Description (With_Arg (Long_Switch, Arg)));
elsif Has_Short and not Has_Long then
Table.Append (TTY_Description (With_Arg (Short_Switch, Arg)));
end if;
Table.Append (Help);
Has_Printable_Rows := True;
end Print_Row;
begin
for Elt of Config.Info loop
Print_Row (To_String (Elt.Switch),
To_String (Elt.Long_Switch),
To_String (Elt.Argument),
To_String (Elt.Help));
end loop;
if Has_Printable_Rows then
Put_Line ("");
Put_Line (TTY_Chapter (Title));
Table.Print (Separator => " ",
Put_Line => Put_Line_For_Access'Access);
end if;
end Display_Options;
----------------------------
-- Display_Global_Options --
----------------------------
procedure Display_Global_Options is
Global_Config : Switches_Configuration;
begin
Set_Global_Switches (Global_Config);
Display_Options (Global_Config, "GLOBAL OPTIONS");
end Display_Global_Options;
------------------
-- Display_Help --
------------------
procedure Display_Help (Keyword : String) is
------------
-- Format --
------------
procedure Format (Text : AAA.Strings.Vector) is
begin
for Line of Text loop
AAA.Text_IO.Put_Paragraph (Highlight_Switches (Line),
Line_Prefix => " ");
end loop;
end Format;
Ukey : constant Unbounded_String := To_Unbounded_String (Keyword);
begin
if Registered_Commands.Contains (Ukey) then
Display_Usage (What_Command (Keyword));
elsif Registered_Topics.Contains (Ukey) then
Put_Line (TTY_Chapter (Registered_Topics.Element (Ukey).Title));
Format (Registered_Topics.Element (Ukey).Content);
elsif Registered_Aliases.Contains (Ukey) then
Put_Line ("'" & Keyword & "' is an alias for: '" &
Main_Command_Name & " " &
Registered_Aliases.Element (Ukey).Flatten & "'");
else
Put_Error ("No help found for: " & Keyword);
Display_Global_Options;
Display_Valid_Commands;
Display_Valid_Topics;
Display_Aliases;
Error_Exit (1);
end if;
end Display_Help;
-------------
-- Execute --
-------------
overriding
procedure Execute (This : in out Builtin_Help;
Args : AAA.Strings.Vector)
is
pragma Unreferenced (This);
begin
if Args.Count /= 1 then
if Args.Count > 1 then
Put_Error ("Please specify a single help keyword");
Put_Line ("");
end if;
Put_Line (TTY_Chapter ("USAGE"));
Put_Line (" " & TTY_Underline (Main_Command_Name) & " " &
TTY_Underline ("help") & " [<command>|<topic>]");
Put_Line ("");
Put_Line (TTY_Chapter ("ARGUMENTS"));
declare
Tab : constant String (1 .. 1) := (others => ' ');
Table : AAA.Table_IO.Table;
begin
Table.New_Row;
Table.Append (Tab);
Table.Append (TTY_Description ("<command>"));
Table.Append ("Command for which to show a description");
Table.New_Row;
Table.Append (Tab);
Table.Append (TTY_Description ("<topic>"));
Table.Append ("Topic for which to show a description");
Table.Print (Separator => " ",
Put_Line => Put_Line_For_Access'Access);
end;
Display_Global_Options;
Display_Valid_Commands;
Display_Valid_Topics;
Display_Aliases;
Error_Exit (1);
end if;
Display_Help (Args (1));
end Execute;
----------------------
-- Is_Global_Switch --
----------------------
function Is_Global_Switch (Switch : String) return Boolean is
Parser : Opt_Parser;
Command_Line : GNAT.OS_Lib.Argument_List_Access :=
GNAT.OS_Lib.Argument_String_To_List (Switch);
Result : Boolean := False;
begin
Initialize_Option_Scan
(Parser,
Command_Line => Command_Line,
Stop_At_First_Non_Switch => True);
begin
Getopt (Config => Global_Config.GNAT_Cfg,
Parser => Parser,
Quiet => True);
Result := True;
exception
when Invalid_Switch =>
Result := False;
end;
GNAT.OS_Lib.Free (Command_Line);
return Result;
end Is_Global_Switch;
end CLIC.Subcommand.Instance;
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