lib/util.c: xbps_remote_binpkg_exists to check if signature and binpkg are cached

include/xbps.h.in

@@ -1913,6 +1913,17 @@ bool xbps_pkg_is_ignored(struct xbps_handle *xhp, const char *pkg);
  */
 bool xbps_binpkg_exists(struct xbps_handle *xhp, xbps_dictionary_t pkgd);
 
+/**
+ * Returns true if binary package and signature exists in cachedir,
+ * false otherwise.
+ *
+ * @param[in] xhp The pointer to an xbps_handle struct.
+ * @param[in] pkgd Package dictionary returned by rpool.
+ *
+ * @return true if exists, false otherwise.
+ */
+bool xbps_remote_binpkg_exists(struct xbps_handle *xhp, xbps_dictionary_t pkgd);
+
 /**
  * Checks if the URI specified by \a uri is remote or local.
  *

lib/util.c

@@ -378,6 +378,35 @@ xbps_binpkg_exists(struct xbps_handle *xhp, xbps_dictionary_t pkgd)
 	return access(path, R_OK) == 0;
 }
 
+bool
+xbps_remote_binpkg_exists(struct xbps_handle *xhp, xbps_dictionary_t pkgd)
+{
+	char path[PATH_MAX];
+	const char *pkgver, *arch;
+
+	assert(xhp);
+	assert(xbps_object_type(pkgd) == XBPS_TYPE_DICTIONARY);
+
+	if (!xbps_dictionary_get_cstring_nocopy(pkgd,
+	    "pkgver", &pkgver))
+		return NULL;
+	if (!xbps_dictionary_get_cstring_nocopy(pkgd,
+	    "architecture", &arch))
+		return NULL;
+
+	snprintf(path, sizeof(path), "%s/%s.%s.xbps.sig", xhp->cachedir,
+	    pkgver, arch);
+
+	/* check if the signature file exists */
+	if (access(path, R_OK) != 0)
+		return false;
+
+	/* strip the .sig suffix and check if binpkg file exists */
+	path[strlen(path)-sizeof (".sig")+1] = '\0';
+
+	return access(path, R_OK) == 0;
+}
+
 bool
 xbps_pkg_has_rundeps(xbps_dictionary_t pkgd)
 {