[iagno] Add --classic and --reverse.

[Arnaud B. <arnaudb src gnome org>]

commit 9cb7730c37155e78e5c3a7cbe05a2d00ee1a30c3
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Sun Aug 18 00:53:18 2019 +0200

    Add --classic and --reverse.

 data/iagno.6   | 13 +++++++++++++
 src/iagno.vala | 23 ++++++++++++++++++++++-
 2 files changed, 35 insertions(+), 1 deletion(-)
---
diff --git a/data/iagno.6 b/data/iagno.6
index a1c8549..e3bd6ce 100644
--- a/data/iagno.6
+++ b/data/iagno.6
@@ -48,6 +48,19 @@ The three options disable setting the mode from the window.
 .br
 You should only use one of these options at the same time.
 .RE
+.PP
+.B \-\-classic
+.br
+.B \-\-reverse
+.RS 7
+Iagno includes two games played with the same mechanisms.
+.br
+The option --classic challenges to finish with more pieces.
+.br
+The option --reverse challenges to finish with less pieces.
+.br
+You should only use one of these options at the same time.
+.RE
 .TP
 .B \-f, \-\-fast\-moves
 Play with reduced delay before the computer moves.
diff --git a/src/iagno.vala b/src/iagno.vala
index c8572ec..1defd9d 100644
--- a/src/iagno.vala
+++ b/src/iagno.vala
@@ -33,6 +33,8 @@ private class Iagno : Gtk.Application, BaseApplication
     private static bool alternative_start;
     private static bool random_start;
     private static bool usual_start;
+    private static bool classic_game;
+    private static bool reverse_game;
     private static string? level = null;
     private static int size = 8;
     private static bool? sound = null;
@@ -64,6 +66,9 @@ private class Iagno : Gtk.Application, BaseApplication
         /* Translators: command-line option description, see 'iagno --help' */
         { "alternative-start", 0, 0, OptionArg.NONE, ref alternative_start, N_("Start with an alternative 
position"), null},
 
+        /* Translators: command-line option description, see 'iagno --help' */
+        { "classic", 0, 0, OptionArg.NONE, ref classic_game,                N_("Play Classic Reversi"), 
null},
+
         /* Translators: command-line option description, see 'iagno --help' */
         { "fast-mode", 'f', 0, OptionArg.NONE, ref fast_mode,               N_("Reduce delay before AI 
moves"), null},
 
@@ -79,6 +84,9 @@ private class Iagno : Gtk.Application, BaseApplication
         /* Translators: command-line option description, see 'iagno --help' */
         { "random-start", 0, 0, OptionArg.NONE, ref random_start,           N_("Start with a random 
position"), null},
 
+        /* Translators: command-line option description, see 'iagno --help' */
+        { "reverse", 0, 0, OptionArg.NONE, ref reverse_game,                N_("Play Reverse Reversi"), 
null},
+
         /* Translators: command-line option description, see 'iagno --help' */
         { "second", 0, 0, OptionArg.NONE, null,                             N_("Play second"), null},
 
@@ -146,6 +154,13 @@ private class Iagno : Gtk.Application, BaseApplication
             return Posix.EXIT_FAILURE;
         }
 
+        if (classic_game && reverse_game)
+        {
+            /* Translators: command-line error message, displayed when two antagonist arguments are used; 
try 'iagno --reverse --classic' */
+            stderr.printf ("%s\n", _("The “--classic” and “--reverse” arguments are mutually exclusive."));
+            return Posix.EXIT_FAILURE;
+        }
+
         if (size < 4)
         {
             /* Translators: command-line error message, displayed for an incorrect game size request; try 
'iagno -s 2' */
@@ -183,9 +198,15 @@ private class Iagno : Gtk.Application, BaseApplication
         settings = new GLib.Settings ("org.gnome.Reversi");
 
         bool start_now = (two_players == true) || (play_first != null);
-        if ((sound != null) || start_now || (level != null))
+        if ((sound != null) || start_now || (level != null) || classic_game || reverse_game)
         {
             settings.delay ();
+
+            if (classic_game)
+                settings.set_string ("type", "classic");
+            else if (reverse_game)
+                settings.set_string ("type", "reverse");
+
             if (sound != null)
                 settings.set_boolean ("sound", (!) sound);