nix-community/noogle
1
1
Fork 0
mirror of https://github.com/nix-community/noogle.git synced 2024-11-23 18:36:59 +03:00
Code Issues Packages Projects Releases Wiki Activity
bc4c5d81b9
noogle/indexer/test/types.nix
hsjobeki effa51cb39
add alias tracking and bulk tests
2023-11-28 17:28:51 +01:00

1019 lines
39 KiB
Nix
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

# Definitions related to run-time type checking. Used in particular
# to type-check NixOS configurations.
{ lib }:
let
inherit (lib)
elem
flip
isAttrs
isBool
isDerivation
isFloat
isFunction
isInt
isList
isString
isStorePath
toDerivation
toList
;
inherit (lib.lists)
all
concatLists
count
elemAt
filter
foldl'
head
imap1
last
length
tail
;
inherit (lib.attrsets)
attrNames
filterAttrs
hasAttr
mapAttrs
optionalAttrs
zipAttrsWith
;
inherit (lib.options)
getFiles
getValues
mergeDefaultOption
mergeEqualOption
mergeOneOption
mergeUniqueOption
showFiles
showOption
;
inherit (lib.strings)
concatMapStringsSep
concatStringsSep
escapeNixString
hasInfix
isStringLike
;
inherit (lib.trivial)
boolToString
;
inherit (lib.modules)
mergeDefinitions
fixupOptionType
mergeOptionDecls
;
outer_types =
rec {
isType = type: x: (x._type or "") == type;
setType = typeName: value: value // {
_type = typeName;
};
/* Default type merging function
takes two type functors and return the merged type
*/
defaultTypeMerge = f: f':
let
wrapped = f.wrapped.typeMerge f'.wrapped.functor;
payload = f.binOp f.payload f'.payload;
in
# cannot merge different types
if f.name != f'.name
then null
# simple types
else if (f.wrapped == null && f'.wrapped == null)
&& (f.payload == null && f'.payload == null)
then f.type
# composed types
else if (f.wrapped != null && f'.wrapped != null) && (wrapped != null)
then f.type wrapped
# value types
else if (f.payload != null && f'.payload != null) && (payload != null)
then f.type payload
else null;
/* Default type functor */
defaultFunctor = name: {
inherit name;
type = types.${name} or null;
wrapped = null;
payload = null;
binOp = a: b: null;
};
isOptionType = isType "option-type";
/*
Function that creates an optionType to be used in the module system.
Example:
Type:
{
name :: String;
description :: String ?;
descriptionClass :: "noun" | "conjunction" | "composite" ?;
check :: (a -> Bool) ?;
merge ::
emptyValue :: {} ?;
getSubOptions :: ( [String] -> {}) ?;
getSubModules :: ( [Module] ) ?;
substSubModules :: ( [Module] ) ?;
typeMerge ::
functor ::
deprecationMessage ::
nestedTypes ::
}
->
{
name :: String
name check merge emptyValue getSubOptions getSubModules substSubModules
typeMerge functor deprecationMessage nestedTypes descriptionClass;
description = if description == null then name else description;
_type :: "option-type";
};
*/
mkOptionType =
{
# Human-readable representation of the type, should be equivalent to
# the type function name.
name
, # Description of the type, defined recursively by embedding the wrapped type if any.
description ? null
# A hint for whether or not this description needs parentheses. Possible values:
# - "noun": a simple noun phrase such as "positive integer"
# - "conjunction": a phrase with a potentially ambiguous "or" connective.
# - "composite": a phrase with an "of" connective
# See the `optionDescriptionPhrase` function.
, descriptionClass ? null
, # DO NOT USE WITHOUT KNOWING WHAT YOU ARE DOING!
# Function applied to each definition that must return false when a definition
# does not match the type. It should not check more than the root of the value,
# because checking nested values reduces laziness, leading to unnecessary
# infinite recursions in the module system.
# Further checks of nested values should be performed by throwing in
# the merge function.
# Strict and deep type checking can be performed by calling lib.deepSeq on
# the merged value.
#
# See https://github.com/NixOS/nixpkgs/pull/6794 that introduced this change,
# https://github.com/NixOS/nixpkgs/pull/173568 and
# https://github.com/NixOS/nixpkgs/pull/168295 that attempted to revert this,
# https://github.com/NixOS/nixpkgs/issues/191124 and
# https://github.com/NixOS/nixos-search/issues/391 for what happens if you ignore
# this disclaimer.
check ? (x: true)
, # Merge a list of definitions together into a single value.
# This function is called with two arguments: the location of
# the option in the configuration as a list of strings
# (e.g. ["boot" "loader "grub" "enable"]), and a list of
# definition values and locations (e.g. [ { file = "/foo.nix";
# value = 1; } { file = "/bar.nix"; value = 2 } ]).
merge ? mergeDefaultOption
, # Whether this type has a value representing nothingness. If it does,
# this should be a value of the form { value = <the nothing value>; }
# If it doesn't, this should be {}
# This may be used when a value is required for `mkIf false`. This allows the extra laziness in e.g. `lazyAttrsOf`.
emptyValue ? { }
, # Return a flat list of sub-options. Used to generate
# documentation.
getSubOptions ? prefix: { }
, # List of modules if any, or null if none.
getSubModules ? null
, # Function for building the same option type with a different list of
# modules.
substSubModules ? m: null
, # Function that merge type declarations.
# internal, takes a functor as argument and returns the merged type.
# returning null means the type is not mergeable
typeMerge ? defaultTypeMerge functor
, # The type functor.
# internal, representation of the type as an attribute set.
# name: name of the type
# type: type function.
# wrapped: the type wrapped in case of compound types.
# payload: values of the type, two payloads of the same type must be
# combinable with the binOp binary operation.
# binOp: binary operation that merge two payloads of the same type.
functor ? defaultFunctor name
, # The deprecation message to display when this type is used by an option
# If null, the type isn't deprecated
deprecationMessage ? null
, # The types that occur in the definition of this type. This is used to
# issue deprecation warnings recursively. Can also be used to reuse
# nested types
nestedTypes ? { }
}:
{
_type = "option-type";
inherit
name check merge emptyValue getSubOptions getSubModules substSubModules
typeMerge functor deprecationMessage nestedTypes descriptionClass;
description = if description == null then name else description;
};
# optionDescriptionPhrase :: (str -> bool) -> optionType -> str
#
# Helper function for producing unambiguous but readable natural language
# descriptions of types.
#
# Parameters
#
# optionDescriptionPhase unparenthesize optionType
#
# `unparenthesize`: A function from descriptionClass string to boolean.
# It must return true when the class of phrase will fit unambiguously into
# the description of the caller.
#
# `optionType`: The option type to parenthesize or not.
# The option whose description we're returning.
#
# Return value
#
# The description of the `optionType`, with parentheses if there may be an
# ambiguity.
optionDescriptionPhrase = unparenthesize: t:
if unparenthesize (t.descriptionClass or null)
then t.description
else "(${t.description})";
# When adding new types don't forget to document them in
# nixos/doc/manual/development/option-types.xml!
types = rec {
/*
Can be anything.
Merge behavior: None; Merging is disabled.
*/
raw = mkOptionType rec {
name = "raw";
description = "raw value";
descriptionClass = "noun";
check = value: true;
merge = mergeOneOption;
};
/*
Can be anything.
Merge behavior: Custom Logic
*/
anything = mkOptionType {
name = "anything";
description = "anything";
descriptionClass = "noun";
check = value: true;
merge = loc: defs:
let
getType = value:
if isAttrs value && isStringLike value
then "stringCoercibleSet"
else builtins.typeOf value;
# Returns the common type of all definitions, throws an error if they
# don't have the same type
commonType = foldl'
(type: def:
if getType def.value == type
then type
else throw "The option `${showOption loc}' has conflicting option types in ${showFiles (getFiles defs)}"
)
(getType (head defs).value)
defs;
mergeFunction = {
# Recursively merge attribute sets
set = (attrsOf anything).merge;
# Safe and deterministic behavior for lists is to only accept one definition
# listOf only used to apply mkIf and co.
list =
if length defs > 1
then throw "The option `${showOption loc}' has conflicting definitions, in ${showFiles (getFiles defs)}."
else (listOf anything).merge;
# This is the type of packages, only accept a single definition
stringCoercibleSet = mergeOneOption;
lambda = loc: defs: arg: anything.merge
(loc ++ [ "<function body>" ])
(map
(def: {
file = def.file;
value = def.value arg;
})
defs);
# Otherwise fall back to only allowing all equal definitions
}.${commonType} or mergeEqualOption;
in
mergeFunction loc defs;
};
/*
Can be anything.
Merge behavior: Default logic
*/
unspecified = mkOptionType {
name = "unspecified";
description = "unspecified value";
descriptionClass = "noun";
};
/*
Allows Boolean values
Merge behavior: Enabled; see lib.mergeEqualOption;
*/
bool = mkOptionType {
name = "bool";
description = "boolean";
descriptionClass = "noun";
check = isBool;
merge = mergeEqualOption;
};
int = mkOptionType {
name = "int";
description = "signed integer";
descriptionClass = "noun";
check = isInt;
merge = mergeEqualOption;
};
/* Specialized subdomains of int
- ints.between
- ints.unsigned
- ints.u8
- ints.u16
- ints.u32
- ints.s8
- ints.s16
- ints.s32
Example:
(ints.between 0 100).check (-1)
=> false
(ints.between 0 100).check (101)
=> false
(ints.between 0 0).check 0
=> true
*/
ints =
let
betweenDesc = lowest: highest:
"${toString lowest} and ${toString highest} (both inclusive)";
between = lowest: highest:
assert lib.assertMsg (lowest <= highest)
"ints.between: lowest must be smaller than highest";
addCheck int (x: x >= lowest && x <= highest) // {
name = "intBetween";
description = "integer between ${betweenDesc lowest highest}";
};
ign = lowest: highest: name: docStart:
between lowest highest // {
inherit name;
description = docStart + "; between ${betweenDesc lowest highest}";
};
unsign = bit: range: ign 0 (range - 1)
"unsignedInt${toString bit}" "${toString bit} bit unsigned integer";
sign = bit: range: ign (0 - (range / 2)) (range / 2 - 1)
"signedInt${toString bit}" "${toString bit} bit signed integer";
in
{
/* An int with a fixed range.
Example:
(ints.between 0 100).check (-1)
=> false
(ints.between 0 100).check (101)
=> false
(ints.between 0 0).check 0
=> true
*/
inherit between;
unsigned = addCheck types.int (x: x >= 0) // {
name = "unsignedInt";
description = "unsigned integer, meaning >=0";
};
positive = addCheck types.int (x: x > 0) // {
name = "positiveInt";
description = "positive integer, meaning >0";
};
u8 = unsign 8 256;
u16 = unsign 16 65536;
# the biggest int Nix accepts is 2^63 - 1 (9223372036854775808)
# the smallest int Nix accepts is -2^63 (-9223372036854775807)
u32 = unsign 32 4294967296;
# u64 = unsign 64 18446744073709551616;
s8 = sign 8 256;
s16 = sign 16 65536;
s32 = sign 32 4294967296;
};
/*
Port number can be unsigned 16 bit
from 0 to 65536
Alias of ints.u16 for a port number. -> See tye.ints for more infos.
*/
port = ints.u16;
/*
A Float number
For more information about validation see: lib.isFloat
Merge behavior: Enabled; see lib.mergeEqualOption
*/
float = mkOptionType {
name = "float";
description = "floating point number";
descriptionClass = "noun";
check = isFloat;
merge = mergeEqualOption;
};
/*
Can be either an Int or a Float
*/
number = either int float;
numbers =
let
betweenDesc = lowest: highest:
"${builtins.toJSON lowest} and ${builtins.toJSON highest} (both inclusive)";
in
{
between = lowest: highest:
assert lib.assertMsg (lowest <= highest)
"numbers.between: lowest must be smaller than highest";
addCheck number (x: x >= lowest && x <= highest) // {
name = "numberBetween";
description = "integer or floating point number between ${betweenDesc lowest highest}";
};
nonnegative = addCheck number (x: x >= 0) // {
name = "numberNonnegative";
description = "nonnegative integer or floating point number, meaning >=0";
};
positive = addCheck number (x: x > 0) // {
name = "numberPositive";
description = "positive integer or floating point number, meaning >0";
};
};
str = mkOptionType {
name = "str";
description = "string";
descriptionClass = "noun";
check = isString;
merge = mergeEqualOption;
};
nonEmptyStr = mkOptionType {
name = "nonEmptyStr";
description = "non-empty string";
descriptionClass = "noun";
check = x: str.check x && builtins.match "[ \t\n]*" x == null;
inherit (str) merge;
};
# Allow a newline character at the end and trim it in the merge function.
singleLineStr =
let
inherit (strMatching "[^\n\r]*\n?") check merge;
in
mkOptionType {
name = "singleLineStr";
description = "(optionally newline-terminated) single-line string";
descriptionClass = "noun";
inherit check;
merge = loc: defs:
lib.removeSuffix "\n" (merge loc defs);
};
strMatching = pattern: mkOptionType {
name = "strMatching ${escapeNixString pattern}";
description = "string matching the pattern ${pattern}";
descriptionClass = "noun";
check = x: str.check x && builtins.match pattern x != null;
inherit (str) merge;
};
# Merge multiple definitions by concatenating them (with the given
# separator between the values).
separatedString = sep: mkOptionType rec {
name = "separatedString";
description =
if sep == ""
then "Concatenated string" # for types.string.
else "strings concatenated with ${builtins.toJSON sep}"
;
descriptionClass = "noun";
check = isString;
merge = loc: defs: concatStringsSep sep (getValues defs);
functor = (defaultFunctor name) // {
payload = sep;
binOp = sepLhs: sepRhs:
if sepLhs == sepRhs then sepLhs
else null;
};
};
lines = separatedString "\n";
commas = separatedString ",";
envVar = separatedString ":";
# Deprecated; should not be used because it quietly concatenates
# strings, which is usually not what you want.
string = separatedString "" // {
name = "string";
deprecationMessage = "See https://github.com/NixOS/nixpkgs/pull/66346 for better alternative types.";
};
passwdEntry = entryType: addCheck entryType (str: !(hasInfix ":" str || hasInfix "\n" str)) // {
name = "passwdEntry ${entryType.name}";
description = "${optionDescriptionPhrase (class: class == "noun") entryType}, not containing newlines or colons";
};
attrs = mkOptionType {
name = "attrs";
description = "attribute set";
check = isAttrs;
merge = loc: foldl' (res: def: res // def.value) { };
emptyValue = { value = { }; };
};
/*
A package is a top-level store path (/nix/store/hash-name). This includes:
- derivations
- more generally, attribute sets with an `outPath` or `__toString` attribute
pointing to a store path, e.g. flake inputs
- strings with context, e.g. "${pkgs.foo}" or (toString pkgs.foo)
- hardcoded store path literals (/nix/store/hash-foo) or strings without context
("/nix/store/hash-foo"). These get a context added to them using builtins.storePath.
*/
package = mkOptionType {
name = "package";
descriptionClass = "noun";
check = x: isDerivation x || isStorePath x;
merge = loc: defs:
let res = mergeOneOption loc defs;
in if builtins.isPath res || (builtins.isString res && ! builtins.hasContext res)
then toDerivation res
else res;
};
shellPackage = package // {
check = x: isDerivation x && hasAttr "shellPath" x;
};
path = mkOptionType {
name = "path";
descriptionClass = "noun";
check = x: isStringLike x && builtins.substring 0 1 (toString x) == "/";
merge = mergeEqualOption;
};
listOf = elemType: mkOptionType rec {
name = "listOf";
description = "list of ${optionDescriptionPhrase (class: class == "noun" || class == "composite") elemType}";
descriptionClass = "composite";
check = isList;
merge = loc: defs:
map (x: x.value) (filter (x: x ? value) (concatLists (imap1
(n: def:
imap1
(m: def':
(mergeDefinitions
(loc ++ [ "[definition ${toString n}-entry ${toString m}]" ])
elemType
[{ inherit (def) file; value = def'; }]
).optionalValue
)
def.value
)
defs)));
emptyValue = { value = [ ]; };
getSubOptions = prefix: elemType.getSubOptions (prefix ++ [ "*" ]);
getSubModules = elemType.getSubModules;
substSubModules = m: listOf (elemType.substSubModules m);
functor = (defaultFunctor name) // { wrapped = elemType; };
nestedTypes.elemType = elemType;
};
nonEmptyListOf = elemType:
let list = addCheck (types.listOf elemType) (l: l != [ ]);
in list // {
description = "non-empty ${optionDescriptionPhrase (class: class == "noun") list}";
emptyValue = { }; # no .value attr, meaning unset
};
attrsOf = elemType: mkOptionType rec {
name = "attrsOf";
description = "attribute set of ${optionDescriptionPhrase (class: class == "noun" || class == "composite") elemType}";
descriptionClass = "composite";
check = isAttrs;
merge = loc: defs:
mapAttrs (n: v: v.value) (filterAttrs (n: v: v ? value) (zipAttrsWith
(name: defs:
(mergeDefinitions (loc ++ [ name ]) elemType defs).optionalValue
)
# Push down position info.
(map (def: mapAttrs (n: v: { inherit (def) file; value = v; }) def.value) defs)));
emptyValue = { value = { }; };
getSubOptions = prefix: elemType.getSubOptions (prefix ++ [ "<name>" ]);
getSubModules = elemType.getSubModules;
substSubModules = m: attrsOf (elemType.substSubModules m);
functor = (defaultFunctor name) // { wrapped = elemType; };
nestedTypes.elemType = elemType;
};
# A version of attrsOf that's lazy in its values at the expense of
# conditional definitions not working properly. E.g. defining a value with
# `foo.attr = mkIf false 10`, then `foo ? attr == true`, whereas with
# attrsOf it would correctly be `false`. Accessing `foo.attr` would throw an
# error that it's not defined. Use only if conditional definitions don't make sense.
lazyAttrsOf = elemType: mkOptionType rec {
name = "lazyAttrsOf";
description = "lazy attribute set of ${optionDescriptionPhrase (class: class == "noun" || class == "composite") elemType}";
descriptionClass = "composite";
check = isAttrs;
merge = loc: defs:
zipAttrsWith
(name: defs:
let
merged = mergeDefinitions (loc ++ [ name ]) elemType defs;
# mergedValue will trigger an appropriate error when accessed
in
merged.optionalValue.value or elemType.emptyValue.value or merged.mergedValue
)
# Push down position info.
(map (def: mapAttrs (n: v: { inherit (def) file; value = v; }) def.value) defs);
emptyValue = { value = { }; };
getSubOptions = prefix: elemType.getSubOptions (prefix ++ [ "<name>" ]);
getSubModules = elemType.getSubModules;
substSubModules = m: lazyAttrsOf (elemType.substSubModules m);
functor = (defaultFunctor name) // { wrapped = elemType; };
nestedTypes.elemType = elemType;
};
# TODO: deprecate this in the future:
loaOf = elemType: types.attrsOf elemType // {
name = "loaOf";
deprecationMessage = "Mixing lists with attribute values is no longer"
+ " possible; please use `types.attrsOf` instead. See"
+ " https://github.com/NixOS/nixpkgs/issues/1800 for the motivation.";
nestedTypes.elemType = elemType;
};
# Value of given type but with no merging (i.e. `uniq list`s are not concatenated).
uniq = elemType: mkOptionType rec {
name = "uniq";
inherit (elemType) description descriptionClass check;
merge = mergeOneOption;
emptyValue = elemType.emptyValue;
getSubOptions = elemType.getSubOptions;
getSubModules = elemType.getSubModules;
substSubModules = m: uniq (elemType.substSubModules m);
functor = (defaultFunctor name) // { wrapped = elemType; };
nestedTypes.elemType = elemType;
};
unique = { message }: type: mkOptionType rec {
name = "unique";
inherit (type) description descriptionClass check;
merge = mergeUniqueOption { inherit message; };
emptyValue = type.emptyValue;
getSubOptions = type.getSubOptions;
getSubModules = type.getSubModules;
substSubModules = m: uniq (type.substSubModules m);
functor = (defaultFunctor name) // { wrapped = type; };
nestedTypes.elemType = type;
};
# Null or value of ...
nullOr = elemType: mkOptionType rec {
name = "nullOr";
description = "null or ${optionDescriptionPhrase (class: class == "noun" || class == "conjunction") elemType}";
descriptionClass = "conjunction";
check = x: x == null || elemType.check x;
merge = loc: defs:
let nrNulls = count (def: def.value == null) defs; in
if nrNulls == length defs then null
else if nrNulls != 0 then
throw "The option `${showOption loc}` is defined both null and not null, in ${showFiles (getFiles defs)}."
else elemType.merge loc defs;
emptyValue = { value = null; };
getSubOptions = elemType.getSubOptions;
getSubModules = elemType.getSubModules;
substSubModules = m: nullOr (elemType.substSubModules m);
functor = (defaultFunctor name) // { wrapped = elemType; };
nestedTypes.elemType = elemType;
};
functionTo = elemType: mkOptionType {
name = "functionTo";
description = "function that evaluates to a(n) ${optionDescriptionPhrase (class: class == "noun" || class == "composite") elemType}";
descriptionClass = "composite";
check = isFunction;
merge = loc: defs:
fnArgs: (mergeDefinitions (loc ++ [ "<function body>" ]) elemType (map (fn: { inherit (fn) file; value = fn.value fnArgs; }) defs)).mergedValue;
getSubOptions = prefix: elemType.getSubOptions (prefix ++ [ "<function body>" ]);
getSubModules = elemType.getSubModules;
substSubModules = m: functionTo (elemType.substSubModules m);
functor = (defaultFunctor "functionTo") // { wrapped = elemType; };
nestedTypes.elemType = elemType;
};
# A submodule (like typed attribute set). See NixOS manual.
submodule = modules: submoduleWith {
shorthandOnlyDefinesConfig = true;
modules = toList modules;
};
# A module to be imported in some other part of the configuration.
deferredModule = deferredModuleWith { };
# A module to be imported in some other part of the configuration.
# `staticModules`' options will be added to the documentation, unlike
# options declared via `config`.
deferredModuleWith = attrs@{ staticModules ? [ ] }: mkOptionType {
name = "deferredModule";
description = "module";
descriptionClass = "noun";
check = x: isAttrs x || isFunction x || path.check x;
merge = loc: defs: {
imports = staticModules ++ map (def: lib.setDefaultModuleLocation "${def.file}, via option ${showOption loc}" def.value) defs;
};
inherit (submoduleWith { modules = staticModules; })
getSubOptions
getSubModules;
substSubModules = m: deferredModuleWith (attrs // {
staticModules = m;
});
functor = defaultFunctor "deferredModuleWith" // {
type = types.deferredModuleWith;
payload = {
inherit staticModules;
};
binOp = lhs: rhs: {
staticModules = lhs.staticModules ++ rhs.staticModules;
};
};
};
# The type of a type!
optionType = mkOptionType {
name = "optionType";
description = "optionType";
descriptionClass = "noun";
check = value: value._type or null == "option-type";
merge = loc: defs:
if length defs == 1
then (head defs).value
else
let
# Prepares the type definitions for mergeOptionDecls, which
# annotates submodules types with file locations
optionModules = map
({ value, file }:
{
_file = file;
# There's no way to merge types directly from the module system,
# but we can cheat a bit by just declaring an option with the type
options = lib.mkOption {
type = value;
};
}
)
defs;
# Merges all the types into a single one, including submodule merging.
# This also propagates file information to all submodules
mergedOption = fixupOptionType loc (mergeOptionDecls loc optionModules);
in
mergedOption.type;
};
submoduleWith =
{ modules
, specialArgs ? { }
, shorthandOnlyDefinesConfig ? false
, description ? null
}@attrs:
let
inherit (lib.modules) evalModules;
allModules = defs: map
({ value, file }:
if isAttrs value && shorthandOnlyDefinesConfig
then { _file = file; config = value; }
else { _file = file; imports = [ value ]; }
)
defs;
base = evalModules {
inherit specialArgs;
modules = [{
# This is a work-around for the fact that some sub-modules,
# such as the one included in an attribute set, expects an "args"
# attribute to be given to the sub-module. As the option
# evaluation does not have any specific attribute name yet, we
# provide a default for the documentation and the freeform type.
#
# This is necessary as some option declaration might use the
# "name" attribute given as argument of the submodule and use it
# as the default of option declarations.
#
# We use lookalike unicode single angle quotation marks because
# of the docbook transformation the options receive. In all uses
# &gt; and &lt; wouldn't be encoded correctly so the encoded values
# would be used, and use of `<` and `>` would break the XML document.
# It shouldn't cause an issue since this is cosmetic for the manual.
_module.args.name = lib.mkOptionDefault "‹name›";
}] ++ modules;
};
freeformType = base._module.freeformType;
name = "submodule";
in
mkOptionType {
inherit name;
description =
if description != null then description
else freeformType.description or name;
check = x: isAttrs x || isFunction x || path.check x;
merge = loc: defs:
(base.extendModules {
modules = [{ _module.args.name = last loc; }] ++ allModules defs;
prefix = loc;
}).config;
emptyValue = { value = { }; };
getSubOptions = prefix: (base.extendModules
{ inherit prefix; }).options // optionalAttrs (freeformType != null) {
# Expose the sub options of the freeform type. Note that the option
# discovery doesn't care about the attribute name used here, so this
# is just to avoid conflicts with potential options from the submodule
_freeformOptions = freeformType.getSubOptions prefix;
};
getSubModules = modules;
substSubModules = m: submoduleWith (attrs // {
modules = m;
});
nestedTypes = lib.optionalAttrs (freeformType != null) {
freeformType = freeformType;
};
functor = defaultFunctor name // {
type = types.submoduleWith;
payload = {
inherit modules specialArgs shorthandOnlyDefinesConfig description;
};
binOp = lhs: rhs: {
modules = lhs.modules ++ rhs.modules;
specialArgs =
let intersecting = builtins.intersectAttrs lhs.specialArgs rhs.specialArgs;
in if intersecting == { }
then lhs.specialArgs // rhs.specialArgs
else throw "A submoduleWith option is declared multiple times with the same specialArgs \"${toString (attrNames intersecting)}\"";
shorthandOnlyDefinesConfig =
if lhs.shorthandOnlyDefinesConfig == null
then rhs.shorthandOnlyDefinesConfig
else if rhs.shorthandOnlyDefinesConfig == null
then lhs.shorthandOnlyDefinesConfig
else if lhs.shorthandOnlyDefinesConfig == rhs.shorthandOnlyDefinesConfig
then lhs.shorthandOnlyDefinesConfig
else throw "A submoduleWith option is declared multiple times with conflicting shorthandOnlyDefinesConfig values";
description =
if lhs.description == null
then rhs.description
else if rhs.description == null
then lhs.description
else if lhs.description == rhs.description
then lhs.description
else throw "A submoduleWith option is declared multiple times with conflicting descriptions";
};
};
};
# A value from a set of allowed ones.
enum = values:
let
inherit (lib.lists) unique;
show = v:
if builtins.isString v then ''"${v}"''
else if builtins.isInt v then builtins.toString v
else if builtins.isBool v then boolToString v
else ''<${builtins.typeOf v}>'';
in
mkOptionType rec {
name = "enum";
description =
# Length 0 or 1 enums may occur in a design pattern with type merging
# where an "interface" module declares an empty enum and other modules
# provide implementations, each extending the enum with their own
# identifier.
if values == [ ] then
"impossible (empty enum)"
else if builtins.length values == 1 then
"value ${show (builtins.head values)} (singular enum)"
else
"one of ${concatMapStringsSep ", " show values}";
descriptionClass =
if builtins.length values < 2
then "noun"
else "conjunction";
check = flip elem values;
merge = mergeEqualOption;
functor = (defaultFunctor name) // { payload = values; binOp = a: b: unique (a ++ b); };
};
# Either value of type `t1` or `t2`.
either = t1: t2: mkOptionType rec {
name = "either";
description = "${optionDescriptionPhrase (class: class == "noun" || class == "conjunction") t1} or ${optionDescriptionPhrase (class: class == "noun" || class == "conjunction" || class == "composite") t2}";
descriptionClass = "conjunction";
check = x: t1.check x || t2.check x;
merge = loc: defs:
let
defList = map (d: d.value) defs;
in
if all (x: t1.check x) defList
then t1.merge loc defs
else if all (x: t2.check x) defList
then t2.merge loc defs
else mergeOneOption loc defs;
typeMerge = f':
let
mt1 = t1.typeMerge (elemAt f'.wrapped 0).functor;
mt2 = t2.typeMerge (elemAt f'.wrapped 1).functor;
in
if (name == f'.name) && (mt1 != null) && (mt2 != null)
then functor.type mt1 mt2
else null;
functor = (defaultFunctor name) // { wrapped = [ t1 t2 ]; };
nestedTypes.left = t1;
nestedTypes.right = t2;
};
# Any of the types in the given list
oneOf = ts:
let
head' = if ts == [ ] then throw "types.oneOf needs to get at least one type in its argument" else head ts;
tail' = tail ts;
in
foldl' either head' tail';
# Either value of type `coercedType` or `finalType`, the former is
# converted to `finalType` using `coerceFunc`.
coercedTo = coercedType: coerceFunc: finalType:
assert lib.assertMsg (coercedType.getSubModules == null)
"coercedTo: coercedType must not have submodules (it’s a ${
coercedType.description})";
mkOptionType rec {
name = "coercedTo";
description = "${optionDescriptionPhrase (class: class == "noun") finalType} or ${optionDescriptionPhrase (class: class == "noun") coercedType} convertible to it";
check = x: (coercedType.check x && finalType.check (coerceFunc x)) || finalType.check x;
merge = loc: defs:
let
coerceVal = val:
if coercedType.check val then coerceFunc val
else val;
in
finalType.merge loc (map (def: def // { value = coerceVal def.value; }) defs);
emptyValue = finalType.emptyValue;
getSubOptions = finalType.getSubOptions;
getSubModules = finalType.getSubModules;
substSubModules = m: coercedTo coercedType coerceFunc (finalType.substSubModules m);
typeMerge = t1: t2: null;
functor = (defaultFunctor name) // { wrapped = finalType; };
nestedTypes.coercedType = coercedType;
nestedTypes.finalType = finalType;
};
# Augment the given type with an additional type check function.
addCheck = elemType: check: elemType // { check = x: elemType.check x && check x; };
};
};
in
outer_types // outer_types.types
Reference in New Issue View Git Blame Copy Permalink