# Version string functions. { lib }: rec { /* Break a version string into its component parts. Example: splitVersion "1.2.3" => ["1" "2" "3"] */ splitVersion = builtins.splitVersion; /* Get the major version string from a string. Example: major "1.2.3" => "1" */ major = v: builtins.elemAt (splitVersion v) 0; /* Get the minor version string from a string. Example: minor "1.2.3" => "2" */ minor = v: builtins.elemAt (splitVersion v) 1; /* Get the patch version string from a string. Example: patch "1.2.3" => "3" */ patch = v: builtins.elemAt (splitVersion v) 2; /* Get string of the first two parts (major and minor) of a version string. Example: majorMinor "1.2.3" => "1.2" */ majorMinor = v: builtins.concatStringsSep "." (lib.take 2 (splitVersion v)); /* Pad a version string with zeros to match the given number of components. Example: pad 3 "1.2" => "1.2.0" pad 3 "1.3-rc1" => "1.3.0-rc1" pad 3 "1.2.3.4" => "1.2.3" */ pad = n: version: let numericVersion = lib.head (lib.splitString "-" version); versionSuffix = lib.removePrefix numericVersion version; in lib.concatStringsSep "." (lib.take n (lib.splitVersion numericVersion ++ lib.genList (_: "0") n)) + versionSuffix; }