gaf/shell.c

   1 /*
   2  * gEDA/gaf command-line utility
   3  * Copyright (C) 2012 Peter Brett <peter@peter-b.co.uk>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19 #ifdef HAVE_CONFIG_H
  20 #  include <config.h>
  21 #endif
  22 #include <version.h>
  23
  24 #include <unistd.h>
  25 #include <stdio.h>
  26 #include <string.h>
  27 #include <getopt.h>
  28
  29 /* Gettext translation */
  30 #include "gettext.h"
  31
  32 #include <libgeda/libgeda.h>
  33 #include <libgeda/libgedaguile.h>
  34
  35 #define shell_short_options "s:c:L:l:h"
  36
  37 static struct option shell_long_options[] =
  38   {
  39     {"help", 0, NULL, 'h'},
  40     {NULL, 0, NULL, 0},
  41   };
  42
  43 static void
  44 shell_usage (void)
  45 {
  46   printf (_("Usage: gaf shell [OPTION ...]\n"
  47 "\n"
  48 "Shell for interactive processing of gEDA data using Scheme.\n"
  49 "\n"
  50 "  -s FILE        load Scheme source code from FILE, and exit\n"
  51 "  -c EXPR        evaluate Scheme expression EXPR, and exit\n"
  52 "  --             stop scanning arguments; run interactively\n"
  53 "\n"
  54 "The above switches stop argument processing, and pass all\n"
  55 "remaining arguments as the value of (command-line).\n"
  56 "\n"
  57 "  -L DIRECTORY   add DIRECTORY to the front of the Scheme load path\n"
  58 "  -l FILE        load Scheme source code from FILE\n"
  59 "  -h, --help     display usage information and exit\n"
  60 "\n"
  61 "Please report bugs to %s.\n"),
  62 PACKAGE_BUGREPORT);
  63   exit (0);
  64 }
  65
  66 /* Some symbols we need */
  67 SCM_SYMBOL (sym_begin, "begin");
  68 SCM_SYMBOL (sym_use_modules, "use-modules");
  69 SCM_SYMBOL (sym_ice_9, "ice-9");
  70 SCM_SYMBOL (sym_readline, "readline");
  71 SCM_SYMBOL (sym_activate_readline, "activate-readline");
  72
  73 static void
  74 cmd_shell_impl (void *data, int argc, char **argv)
  75 {
  76   int c, interactive = 1;
  77   TOPLEVEL *toplevel;
  78
  79   #include "shell.x"
  80
  81   /* Parse command-line arguments */
  82   while ((c = getopt_long (argc, argv, shell_short_options,
  83                            shell_long_options, NULL)) != -1) {
  84     switch (c) {
  85     case 0:
  86       /* This is a long-form-only flag option, and has already been
  87        * dealt with by getopt_long(). */
  88       break;
  89     case 's':
  90     case 'c':
  91       interactive = 0;
  92       /* Intentionally falls through */
  93     case 'l':
  94     case 'L':
  95       /* Do nothing, scm_shell() will deal with these. */
  96       break;
  97     case 'h':
  98       shell_usage ();
  99       break;
 100     case '?':
 101       /* getopt_long already printed an error message */
 102       fprintf (stderr, _("\nRun `gaf shell --help' for more information.\n"));
 103       exit (1);
 104       break;
 105     default:
 106       g_assert_not_reached ();
 107     }
 108   }
 109
 110   libgeda_init ();
 111   scm_dynwind_begin (0);
 112   toplevel = s_toplevel_new ();
 113   edascm_dynwind_toplevel (toplevel);
 114
 115   /* Interactive, so enable readline support and print an abbreviated
 116    * version message. */
 117   if (interactive) {
 118     printf ("gEDA %s (g%.7s)\n", PACKAGE_DOTTED_VERSION, PACKAGE_GIT_COMMIT);
 119     SCM expr = scm_list_3 (sym_begin,
 120                            scm_list_2 (sym_use_modules,
 121                                        scm_list_2 (sym_ice_9, sym_readline)),
 122                            scm_list_1 (sym_activate_readline));
 123
 124     scm_eval_x (expr, scm_current_module ());
 125   }
 126
 127   /* Now load rc files, if necessary */
 128   if (getenv ("GAF_INHIBIT_RCFILES") == NULL) {
 129     g_rc_parse (toplevel, "gaf shell", NULL, NULL);
 130   }
 131   i_vars_libgeda_set (toplevel); /* Ugh */
 132
 133   scm_shell (argc, argv); /* Doesn't return */
 134
 135   scm_dynwind_end ();
 136 }
 137
 138 int
 139 cmd_shell (int argc, char **argv)
 140 {
 141   scm_boot_guile (argc, argv, cmd_shell_impl, NULL); /* Doesn't return */
 142   return 0;
 143 }