Introduce xbps_repo_get_pkg_plist() and use it in xbps-query -R.

bin/xbps-query/show-info-files.c

@@ -299,7 +299,7 @@ repo_show_pkg_info(struct xbps_handle *xhp,
 	    ((ipkgd = xbps_rpool_get_virtualpkg(xhp, pattern)) == NULL))
 		return errno;
 
-	if ((bpkgd = xbps_rpool_get_pkg_plist(xhp, pattern, "./props.plist")) == NULL)
+	if ((bpkgd = xbps_repo_get_pkg_plist(xhp, ipkgd, "./props.plist")) == NULL)
 		return errno;
 
 	prop_dictionary_set(bpkgd, "filename-sha256",

include/xbps_api.h.in

@@ -41,7 +41,7 @@
  *
  * This header documents the full API for the XBPS Library.
  */
-#define XBPS_API_VERSION	"20130614"
+#define XBPS_API_VERSION	"20130614-1"
 
 #ifndef XBPS_VERSION
  #define XBPS_VERSION		"UNSET"
@@ -1322,6 +1322,20 @@ prop_dictionary_t xbps_repo_get_pkg(struct xbps_repo *repo, const char *pkg);
 prop_dictionary_t xbps_repo_get_virtualpkg(struct xbps_repo *repo,
 					     const char *pkg);
 
+/**
+ * Returns a pkg dictionary of the matching \a plist file from a binary package,
+ * by looking at its package dictionary (\a pkgd) returned by a repository or rpool.
+ *
+ * @param[in] xhp Pointer to the xbps_handle struct.
+ * @param[in] pkgd Package dictionary returned by xbps_{repo,rpool}_get_xxxpkg().
+ * @param[in] plist Plist filename to internalize from matching binary package.
+ *
+ * @return The pkg dictionary on success, NULL otherwise.
+ */
+prop_dictionary_t xbps_repo_get_pkg_plist(struct xbps_handle *xhp,
+					prop_dictionary_t pkgd,
+					const char *plist);
+
 /**
  * Returns a proplib array of strings with reverse dependencies from
  * repository \a repo matching the expression \a pkg.

lib/repo.c

@@ -190,6 +190,22 @@ xbps_repo_get_pkg(struct xbps_repo *repo, const char *pkg)
 	return NULL;
 }
 
+prop_dictionary_t
+xbps_repo_get_pkg_plist(struct xbps_handle *xhp, prop_dictionary_t pkgd,
+		const char *plist)
+{
+	prop_dictionary_t bpkgd;
+	char *url;
+
+	url = xbps_repository_pkg_path(xhp, pkgd);
+	if (url == NULL)
+		return NULL;
+
+	bpkgd = xbps_get_pkg_plist_from_binpkg(url, plist);
+	free(url);
+	return bpkgd;
+}
+
 static prop_array_t
 revdeps_match(struct xbps_repo *repo, prop_dictionary_t tpkgd, const char *str)
 {