Add vlc-cache-gen to generate the plugins cache off-line

bin/Makefile.am

@@ -2,6 +2,7 @@
 #
 bin_PROGRAMS = vlc
 noinst_PROGRAMS = vlc-static
+vlclib_PROGRAMS = vlc-cache-gen
 EXTRA_PROGRAMS = vlc-wrapper
 
 AM_CFLAGS = `$(VLC_CONFIG) --cflags vlc`
@@ -46,3 +47,7 @@ endif
 vlc_win32_rc.$(OBJEXT): $(top_builddir)/share/vlc_win32_rc.rc
 	$(WINDRES) --include-dir $(top_srcdir)/share -i $< -o $@
 
+vlc_cache_gen_SOURCES = cachegen.c
+vlc_cache_gen_LDADD = \
+	../compat/libcompat.la \
+	../src/libvlc.la ../src/libvlccore.la

bin/cachegen.c

@@ -0,0 +1,107 @@
+/*****************************************************************************
+ * cachegen.c: LibVLC plugins cache generator
+ *****************************************************************************
+ * Copyright (C) 2010 Rémi Denis-Courmont
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY 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
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc/vlc.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <locale.h>
+
+#ifdef HAVE_GETOPT_H
+# include <getopt.h>
+#endif
+
+static void version (void)
+{
+    puts ("LibVLC plugins cache generation version "VERSION);
+}
+
+static void usage (const char *path)
+{
+    printf ("Usage: %s <path>\n"
+            "Generate the LibVLC plugins cache "
+            "for the specified plugins directory.\n", path);
+}
+
+/* Explicit HACK */
+extern void LocaleFree (const char *);
+extern char *FromLocale (const char *);
+
+int main (int argc, char *argv[])
+{
+    static const struct option opts[] =
+    {
+        { "help",       no_argument,       NULL, 'h' },
+        { "version",    no_argument,       NULL, 'V' },
+        { NULL,         no_argument,       NULL, '\0'}
+    };
+
+    setlocale (LC_CTYPE, ""); /* needed by FromLocale() */
+
+    int c;
+    while ((c = getopt_long (argc, argv, "hV", opts, NULL)) != -1)
+        switch (c)
+        {
+            case 'h':
+                usage (argv[0]);
+                return 0;
+            case 'V':
+                version ();
+                return 0;
+            default:
+                usage (argv[0]);
+                return 1;
+        }
+
+    for (int i = optind; i < argc; i++)
+    {
+        /* Note that FromLocale() can be used before libvlc is initialized */
+        const char *path = FromLocale (argv[i]);
+        char *arg;
+
+        if (asprintf (&arg, "--plugin-path=%s", path) == -1)
+            abort ();
+
+        const char *const vlc_argv[] = {
+            "--ignore-config",
+            "--quiet",
+            arg,
+            NULL,
+        };
+
+        libvlc_exception_t ex;
+        libvlc_exception_init (&ex);
+
+        libvlc_instance_t *vlc = libvlc_new (3, vlc_argv, &ex);
+        if (vlc != NULL)
+            libvlc_release (vlc);
+        free (arg);
+        if (vlc == NULL)
+            fprintf (stderr, "No plugins in %s\n", path);
+        LocaleFree (path);
+        if (vlc == NULL)
+            return 1;
+    }
+
+    return 0;
+}