New configuration scheme changes, round 2 (virtual pkgs).

- XBPS now expects to read individual virtual pkg settings from
  .plist files in PREFIX/etc/xbps/virtualpkg.d.wants.

This really implements the missing part in issue #12 in
googlecode: http://code.google.com/p/xbps/issues/detail?id=12

lib/Makefile

@@ -45,7 +45,7 @@ OBJS += transaction_dictionary.o transaction_sortdeps.o
 OBJS += download.o fexec.o humanize_number.o plist.o
 OBJS += plist_archive_entry.o plist_find.o plist_match.o plist_remove.o
 OBJS += plist_fetch.o util.o util_hash.o mkpath.o initend.o
-OBJS += regpkgdb_dictionary.o match.o dewey.o
+OBJS += regpkgdb_dictionary.o match.o dewey.o init_virtualpkgs.o
 OBJS += repository_findpkg.o repository_finddeps.o
 OBJS += repository_pool.o repository_pool_find.o repository_sync_index.o
 OBJS += $(COMPAT_SRCS)

lib/init_virtualpkgs.c

@@ -0,0 +1,99 @@
+/*-
+ * Copyright (c) 2011 Juan Romero Pardines.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <dirent.h>
+
+#include "xbps_api_impl.h"
+
+/**
+ * @file lib/init_virtualpkg.c
+ * @brief Initialization of virtual package settings.
+ */
+
+#define _VPKGDIR	XBPS_SYSCONF_PATH "/" XBPS_VIRTUALPKGD_PATH
+
+void HIDDEN
+xbps_init_virtual_pkgs(struct xbps_handle *xh)
+{
+	struct dirent *dp;
+	DIR *dirp;
+	prop_dictionary_t vpkgd;
+	char *vpkgfile;
+
+	/*
+	 * Internalize all plist files from _VPKGDIR and add them
+	 * into xhp->virtualpkgs_array.
+	 */
+	dirp = opendir(_VPKGDIR);
+	if (dirp == NULL) {
+		xbps_dbg_printf("%s: cannot access to %s for virtual "
+		    "packages: %s\n", __func__, _VPKGDIR,
+		    strerror(errno));
+		return;
+	}
+	while ((dp = readdir(dirp)) != NULL) {
+		if ((strcmp(dp->d_name, ".") == 0) ||
+		    (strcmp(dp->d_name, "..") == 0))
+			continue;
+
+		if (strstr(dp->d_name, ".plist") == NULL)
+			continue;
+
+		vpkgfile = xbps_xasprintf("%s/%s", _VPKGDIR, dp->d_name);
+		if (vpkgfile == NULL) {
+			(void)closedir(dirp);
+			xbps_dbg_printf("%s: failed to alloc mem for %s\n",
+			    __func__, dp->d_name);
+			continue;
+		}
+		vpkgd = prop_dictionary_internalize_from_file(vpkgfile);
+		free(vpkgfile);
+
+		if (vpkgd == NULL) {
+			xbps_dbg_printf("%s: failed to internalize %s: %s\n",
+			    __func__, dp->d_name, strerror(errno));
+			(void)closedir(dirp);
+			continue;
+		}
+		if (prop_object_type(xh->virtualpkgs_array) == PROP_TYPE_UNKNOWN)
+			xh->virtualpkgs_array = prop_array_create();
+
+		if (!xbps_add_obj_to_array(xh->virtualpkgs_array, vpkgd)) {
+			xbps_dbg_printf("%s: failed to add %s virtualpkg "
+			    "dictionary!\n", __func__, dp->d_name);
+			prop_object_release(vpkgd);
+			(void)closedir(dirp);
+			continue;
+		}
+		xbps_dbg_printf("%s: added virtualpkg from: %s\n",
+		    __func__, dp->d_name);
+	}
+	(void)closedir(dirp);
+}

lib/initend.c

@@ -164,6 +164,9 @@ xbps_init(struct xbps_handle *xh)
 	if (prop_object_type(xh->conffile) == PROP_TYPE_STRING)
 		prop_object_release(xh->conffile);
 
+	/* Initialize virtual package settings */
+	xbps_init_virtual_pkgs(xhp);
+
 	return 0;
 }
 
@@ -180,6 +183,8 @@ xbps_end(struct xbps_handle *xh)
 		prop_object_release(xh->rootdir);
 	if (prop_object_type(xh->cachedir) == PROP_TYPE_STRING)
 		prop_object_release(xh->cachedir);
+	if (prop_object_type(xh->virtualpkgs_array) == PROP_TYPE_ARRAY)
+		prop_object_release(xh->virtualpkgs_array);
 	if (xh->xfcd != NULL)
 		free(xh->xfcd);
 	if (xh->xucd != NULL)

lib/plist_find.c

@@ -127,11 +127,10 @@ find_virtualpkg_user_in_conf(const char *vpkg, bool bypattern)
 	char *vpkgname = NULL;
 
 	xhp = xbps_handle_get();
-	if (xhp->virtualpkg_dictionary == NULL)
+	if (prop_object_type(xhp->virtualpkgs_array) != PROP_TYPE_ARRAY)
 		return NULL;
 
-	if ((iter = xbps_array_iter_from_dict(xhp->virtualpkg_dictionary,
-	    "virtual-packages")) == NULL)
+	if ((iter = prop_array_iterator(xhp->virtualpkgs_array)) == NULL)
 		return NULL;
 
 	while ((obj = prop_object_iterator_next(iter)) != NULL) {