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Use custom writeTOML on older nixpkgs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| { lib }: | ||
| let | ||
| inherit (lib) | ||
| length | ||
| elemAt | ||
| concatMap | ||
| all | ||
| concatLists | ||
| concatStringsSep | ||
| concatMapStringsSep | ||
| mapAttrsToList | ||
| ; | ||
|
|
||
| inherit (builtins) | ||
| abort | ||
| match | ||
| toJSON | ||
| typeOf | ||
| ; | ||
|
|
||
| quoteKey = k: | ||
| if match "[a-zA-Z]+" k == [] | ||
| then k | ||
| else quoteString k; | ||
|
|
||
| quoteString = builtins.toJSON; | ||
|
|
||
| outputValInner = v: | ||
| let | ||
| ty = tomlTy v; | ||
| in | ||
| if ty == "set" then | ||
| let | ||
| vals = mapAttrsToList | ||
| (k': v': "${quoteKey k'} = ${outputValInner v'}") v; | ||
| valsStr = concatStringsSep ", " vals; | ||
| in | ||
| "{ ${valsStr} }" else | ||
| outputVal v; | ||
|
|
||
| outputVal = v: | ||
| let | ||
| ty = tomlTy v; | ||
| in | ||
| if (ty == "bool" || ty == "int") then | ||
| builtins.toJSON v | ||
| else | ||
| if ty == "string" then | ||
| quoteString v | ||
| else | ||
| if ty == "list" || ty == "list_of_attrs" then | ||
| let | ||
| vals = map quoteString v; | ||
| valsStr = concatStringsSep ", " vals; | ||
| in | ||
| "[ ${valsStr} ]" | ||
| else | ||
| if ty == "set" then | ||
| abort "unsupported set for not-inner value" | ||
| else abort "Not implemented: type ${ty}"; | ||
|
|
||
| outputKeyValInner = k: v: | ||
| let | ||
| ty = tomlTy v; | ||
| in | ||
| if ty == "set" then | ||
| let | ||
| vals = mapAttrsToList | ||
| (k': v': "${quoteKey k'} = ${outputValInner v'}") v; | ||
| valsStr = concatStringsSep ", " vals; | ||
| in | ||
| [ "${quoteKey k} = { ${valsStr} }" ] else | ||
| outputKeyVal k v; | ||
|
|
||
| # Returns a list of strings; one string per line | ||
| outputKeyVal = k: v: | ||
| let | ||
| ty = tomlTy v; | ||
| in | ||
| if ty == "bool" || ty == "int" then | ||
| [ "${quoteKey k} = ${outputValInner v}" ] | ||
| else | ||
| if ty == "string" then | ||
| [ "${quoteKey k} = ${quoteString v}" ] | ||
| else | ||
| if ty == "list_of_attrs" then | ||
| concatMap ( | ||
| inner: | ||
| [ "[[${k}]]" ] ++ (concatLists (mapAttrsToList outputKeyValInner inner)) | ||
| ) v | ||
| else | ||
| if ty == "list" then | ||
| let | ||
| vals = map quoteString v; | ||
| valsStr = concatStringsSep ", " vals; | ||
| in | ||
| [ "${quoteKey k} = [ ${valsStr} ]" ] else | ||
| if ty == "set" then | ||
| [ "[${k}]" ] ++ (concatLists (mapAttrsToList outputKeyValInner v)) | ||
| else abort "Not implemented: type ${ty} for key ${k}"; | ||
|
|
||
| tomlTy = x: | ||
| if typeOf x == "string" then "string" else | ||
| if typeOf x == "bool" then "bool" else | ||
| if typeOf x == "int" then "int" else | ||
| if typeOf x == "float" then "float" else | ||
| if typeOf x == "set" then | ||
| if lib.isDerivation x then "string" else "set" else | ||
| if typeOf x == "list" then | ||
| if length x == 0 then "list" | ||
| else | ||
| let | ||
| ty = typeOf (elemAt x 0); | ||
| in | ||
| #assert (all (v: typeOf v == ty) x); | ||
| if ty == "set" then "list_of_attrs" else "list" | ||
| else abort "Not implemented: toml type for ${typeOf x}"; | ||
|
|
||
| toTOML = attrs: | ||
| assert (typeOf attrs == "set"); | ||
| let | ||
| byTy = lib.foldl | ||
| ( | ||
| acc: x: | ||
| let | ||
| ty = tomlTy x.v; | ||
| in | ||
| acc // { "${ty}" = (acc.${ty} or []) ++ [ x ]; } | ||
| ) | ||
| {} (mapAttrsToList (k: v: { inherit k v; }) attrs); | ||
| in | ||
| concatMapStringsSep "\n" | ||
| (kv: concatStringsSep "\n" (outputKeyVal kv.k kv.v)) | ||
| ( | ||
| (byTy.string or []) ++ (byTy.int or []) ++ (byTy.float or []) ++ (byTy.list or []) ++ (byTy.list_of_attrs or []) ++ (byTy.set or []) | ||
| ) | ||
| ; | ||
| in | ||
| toTOML |
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