nettsiden/nix/php-generator.nix

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{ pkgs, lib }:
with lib;
{ }: let
valueToString = val:
if val == null then
"null"
else if isString val then
builtins.toJSON val
else if isBool val then
boolToString val
else if isInt val || isFloat val then
toString val
else if isList val then
"array(${concatMapStringsSep ", " valueToString val})"
else if isAttrs val && val ? value && (val._type or "") == "raw" then
val.value
else if isAttrs val then
throw "Found unexpected attrs, that were not created by mkRaw. Have you put attrs in an array?\n${val}"
else throw "unsupported :')";
in {
inherit (pkgs.formats.json { }) type;
generate = name: value: let
flattenStructuredSettings = attrs: let
partitionAttrs = pred: attrs: lib.pipe attrs [
attrsToList
(partition ({ name, value }: pred name value))
(mapAttrs (_: listToAttrs))
];
partitionedAttrs = partitionAttrs (_: v: isAttrs v && !(v ? value && (v._type or "") == "raw")) attrs;
flattenedAttrs = lib.pipe partitionedAttrs.right [
(mapAttrs (n1: mapAttrs' (n2: v2: nameValuePair "${n1}_${n2}" v2)))
attrValues
(map flattenStructuredSettings)
(foldl recursiveUpdate { })
];
in recursiveUpdate flattenedAttrs partitionedAttrs.wrong;
content = lib.pipe value [
flattenStructuredSettings
(mapAttrs (_: valueToString))
(mapAttrsToList (n: v: ''''$${n} = ${v};''))
(concatStringsSep "\n")
(content: "<?php\n${content}\n?>")
];
in pkgs.writeText name content;
lib = {
inherit valueToString;
mkRaw = value: {
inherit value;
_type = "raw";
};
types.raw = lib.types.attrs;
};
}