Check that pkg is installed before removing.

--HG--
extra : convert_revision : 4ea85e367ecbc0d39dcba1c8ee63392f0e1177f7

bin/xbps-bin.c

@@ -354,7 +354,12 @@ main(int argc, char **argv)
 		} else {
 			rv = xbps_remove_binary_pkg(argv[1], root);
 			if (rv) {
-				printf("ERROR: unable to remove %s.\n", argv[1]);
+				if (rv == ENOENT)
+					printf("Package %s is not installed.\n",
+					    argv[1]);
+				else
+					printf("ERROR: unable to remove %s.\n",
+					    argv[1]);
 				exit(rv);
 			}
 			printf("Package %s removed successfully.\n", argv[1]);

lib/remove.c

@@ -35,6 +35,28 @@
 
 #include <xbps_api.h>
 
+static bool
+check_installed_pkgname(const char *pkgname)
+{
+	prop_dictionary_t pkgd;
+	char *plist;
+
+	assert(pkgname != NULL);
+
+	plist = xbps_append_full_path(true, NULL, XBPS_REGPKGDB);
+	if (plist == NULL)
+		return EINVAL;
+
+	pkgd = xbps_find_pkg_from_plist(plist, pkgname);
+	free(plist);
+	if (pkgd) {
+		prop_object_release(pkgd);
+		return true;
+	}
+
+	return false;
+}
+
 int
 xbps_unregister_pkg(const char *pkgname)
 {
@@ -69,6 +91,10 @@ xbps_remove_binary_pkg(const char *pkgname, const char *destdir)
 	if (destdir == NULL)
 		destdir = "";
 
+	/* Check if pkg is installed */
+	if (check_installed_pkgname(pkgname) == false)
+		return ENOENT;
+
 	/*
 	 * This length is '%s%s/metadata/%s/prepost-action' not
 	 * including nul.