diff options
Diffstat (limited to 'lib/strings.nix')
| -rw-r--r-- | lib/strings.nix | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/lib/strings.nix b/lib/strings.nix index 895b230744f..d67052bbf13 100644 --- a/lib/strings.nix +++ b/lib/strings.nix @@ -12,7 +12,11 @@ rec { # Concatenate a list of strings. - concatStrings = lib.foldl' (x: y: x + y) ""; + concatStrings = + if builtins ? concatStringsSep then + builtins.concatStringsSep "" + else + lib.foldl' (x: y: x + y) ""; # Map a function over a list and concatenate the resulting strings. @@ -31,8 +35,8 @@ rec { # Concatenate a list of strings with a separator between each element, e.g. # concatStringsSep " " ["foo" "bar" "xyzzy"] == "foo bar xyzzy" - concatStringsSep = separator: list: - concatStrings (intersperse separator list); + concatStringsSep = builtins.concatStringsSep or (separator: list: + concatStrings (intersperse separator list)); concatMapStringsSep = sep: f: list: concatStringsSep sep (map f list); concatImapStringsSep = sep: f: list: concatStringsSep sep (lib.imap f list); |