nix-dotfiles/lib/termColors.nix

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{ stdlib, strings }:
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let
inherit (strings) wrap;
inherit (stdlib.attrsets) mapAttrs' nameValuePair;
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in rec {
# String
escapeCharacter = "";
# String -> String
escapeColor = color: "${escapeCharacter}[${color}m";
# String
resetCharacter = escapeColor "0";
# String -> String -> String
wrapWithColor = color: wrap color resetCharacter;
# String -> String -> String
wrapWithColor' = color: wrap (escapeColor color) resetCharacter;
# AttrSet{String}
colorMappings = {
"black" = "0";
"red" = "1";
"green" = "2";
"yellow" = "3";
"blue" = "4";
"magenta" = "5";
"cyan" = "6";
"white" = "7";
};
# AttrSet{(String -> String)}
front = let
# AttrSet{(String -> String)}
names = mapAttrs' (n: v: nameValuePair n (wrapWithColor' ("3" + v))) colorMappings;
# AttrSet{(String -> String)}
numbers = mapAttrs' (n: v: nameValuePair v (wrapWithColor' ("3" + v))) colorMappings;
in names // numbers;
back = let
# AttrSet{(String -> String)}
names = mapAttrs' (n: v: nameValuePair n (wrapWithColor' ("4" + v))) colorMappings;
# AttrSet{(String -> String)}
numbers = mapAttrs' (n: v: nameValuePair v (wrapWithColor' ("4" + v))) colorMappings;
in names // numbers;
}