70 lines
2.1 KiB
Nix
70 lines
2.1 KiB
Nix
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{pkgs, lib}: {
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# Format for defining configuration of some PHP services, that use "include 'config.php';" approach.
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format = {finalVariable ? null}: let
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toPHP = value: {
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"null" = "null";
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"bool" = if value then "true" else "false";
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"int" = toString value;
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"float" = toString value;
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"string" = string value;
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"set" = attrs value;
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"list" = list value;
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}
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.${builtins.typeOf value} or
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(abort "should never happen: unknown value type ${builtins.typeOf value}");
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# https://www.php.net/manual/en/language.types.string.php#language.types.string.syntax.single
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escapeSingleQuotedString = lib.escape [ "'" "\\" ];
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string = value: "'${escapeSingleQuotedString value}'";
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listContent = values: lib.concatStringsSep ", " (map toPHP values);
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list = values: "[" + (listContent values) + "]";
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attrsContent = values: lib.pipe values [
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(lib.mapAttrsToList (k: v: "${toPHP k} => ${toPHP v}"))
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(lib.concatStringsSep ", ")
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];
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attrs = set:
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if set ? _phpType then specialType set
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else
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"[" + attrsContent set + "]";
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mixedArray = {list, set}: if list == [] then attrs set else "[${listContent list}, ${attrsContent set}]";
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specialType = {value, _phpType}: {
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"mixed_array" = mixedArray value;
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"raw" = value;
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}.${_phpType};
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type = with lib.types;
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nullOr (oneOf [
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bool
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int
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float
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str
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(attrsOf type)
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(listOf type)
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])
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// {
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description = "PHP value";
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};
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in {
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inherit type;
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lib = {
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mkMixedArray = list: set: {_phpType = "mixed_array"; value = { inherit list set;}; };
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mkRaw = raw: {_phpType = "raw"; value = raw;};
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};
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generate = name: value: pkgs.writeTextFile {
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inherit name;
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text = let
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# strict_types enabled here to easily debug problems when calling functions of incorrect type using `mkRaw`.
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phpHeader = "<?php\ndeclare(strict_types=1);\n";
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in if finalVariable == null then phpHeader + "return ${toPHP value};\n" else phpHeader + "\$${finalVariable} = ${toPHP value};\n";
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};
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};
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}
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