diff options
| -rw-r--r-- | lib/strings.nix | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/strings.nix b/lib/strings.nix index 56d990de62d..39112407c57 100644 --- a/lib/strings.nix +++ b/lib/strings.nix @@ -208,4 +208,15 @@ rec { # standard GNU Autoconf scripts. enableFeature = enable: feat: "--${if enable then "enable" else "disable"}-${feat}"; + # Create a fixed width string with additional prefix to match required width + fixedWidthString = width: filler: str: + let + strw = lib.stringLength str; + reqWidth = width - (lib.stringLength filler); + in + assert strw <= width; + if strw == width then str else filler + fixedWidthString reqWidth filler str; + + # Format a number adding leading zeroes up to fixed width + fixedWidthNumber = width: n: fixedWidthString width "0" (toString n); } |