374 lines
12 KiB
Nix
374 lines
12 KiB
Nix
{ lib }:
|
|
|
|
let
|
|
inherit (lib)
|
|
and
|
|
any
|
|
attrByPath
|
|
attrNames
|
|
compare
|
|
concat
|
|
concatMap
|
|
elem
|
|
filter
|
|
foldl
|
|
foldr
|
|
genericClosure
|
|
head
|
|
imap1
|
|
init
|
|
isAttrs
|
|
isFunction
|
|
isInt
|
|
isList
|
|
lists
|
|
listToAttrs
|
|
mapAttrs
|
|
mergeAttrs
|
|
meta
|
|
nameValuePair
|
|
tail
|
|
toList
|
|
;
|
|
|
|
inherit (lib.attrsets) removeAttrs;
|
|
|
|
# returns default if env var is not set
|
|
maybeEnv = name: default:
|
|
let value = builtins.getEnv name; in
|
|
if value == "" then default else value;
|
|
|
|
defaultMergeArg = x : y: if builtins.isAttrs y then
|
|
y
|
|
else
|
|
(y x);
|
|
defaultMerge = x: y: x // (defaultMergeArg x y);
|
|
foldArgs = merger: f: init: x:
|
|
let arg = (merger init (defaultMergeArg init x));
|
|
# now add the function with composed args already applied to the final attrs
|
|
base = (setAttrMerge "passthru" {} (f arg)
|
|
( z: z // {
|
|
function = foldArgs merger f arg;
|
|
args = (attrByPath ["passthru" "args"] {} z) // x;
|
|
} ));
|
|
withStdOverrides = base // {
|
|
override = base.passthru.function;
|
|
};
|
|
in
|
|
withStdOverrides;
|
|
|
|
|
|
# shortcut for attrByPath ["name"] default attrs
|
|
maybeAttrNullable = maybeAttr;
|
|
|
|
# shortcut for attrByPath ["name"] default attrs
|
|
maybeAttr = name: default: attrs: attrs.${name} or default;
|
|
|
|
|
|
# Return the second argument if the first one is true or the empty version
|
|
# of the second argument.
|
|
ifEnable = cond: val:
|
|
if cond then val
|
|
else if builtins.isList val then []
|
|
else if builtins.isAttrs val then {}
|
|
# else if builtins.isString val then ""
|
|
else if val == true || val == false then false
|
|
else null;
|
|
|
|
|
|
# Return true only if there is an attribute and it is true.
|
|
checkFlag = attrSet: name:
|
|
if name == "true" then true else
|
|
if name == "false" then false else
|
|
if (elem name (attrByPath ["flags"] [] attrSet)) then true else
|
|
attrByPath [name] false attrSet ;
|
|
|
|
|
|
# Input : attrSet, [ [name default] ... ], name
|
|
# Output : its value or default.
|
|
getValue = attrSet: argList: name:
|
|
( attrByPath [name] (if checkFlag attrSet name then true else
|
|
if argList == [] then null else
|
|
let x = builtins.head argList; in
|
|
if (head x) == name then
|
|
(head (tail x))
|
|
else (getValue attrSet
|
|
(tail argList) name)) attrSet );
|
|
|
|
|
|
# Input : attrSet, [[name default] ...], [ [flagname reqs..] ... ]
|
|
# Output : are reqs satisfied? It's asserted.
|
|
checkReqs = attrSet: argList: condList:
|
|
(
|
|
foldr and true
|
|
(map (x: let name = (head x); in
|
|
|
|
((checkFlag attrSet name) ->
|
|
(foldr and true
|
|
(map (y: let val=(getValue attrSet argList y); in
|
|
(val!=null) && (val!=false))
|
|
(tail x))))) condList));
|
|
|
|
|
|
# This function has O(n^2) performance.
|
|
uniqList = { inputList, acc ? [] }:
|
|
let go = xs: acc:
|
|
if xs == []
|
|
then []
|
|
else let x = head xs;
|
|
y = if elem x acc then [] else [x];
|
|
in y ++ go (tail xs) (y ++ acc);
|
|
in go inputList acc;
|
|
|
|
uniqListExt = { inputList,
|
|
outputList ? [],
|
|
getter ? (x: x),
|
|
compare ? (x: y: x==y) }:
|
|
if inputList == [] then outputList else
|
|
let x = head inputList;
|
|
isX = y: (compare (getter y) (getter x));
|
|
newOutputList = outputList ++
|
|
(if any isX outputList then [] else [x]);
|
|
in uniqListExt { outputList = newOutputList;
|
|
inputList = (tail inputList);
|
|
inherit getter compare;
|
|
};
|
|
|
|
condConcat = name: list: checker:
|
|
if list == [] then name else
|
|
if checker (head list) then
|
|
condConcat
|
|
(name + (head (tail list)))
|
|
(tail (tail list))
|
|
checker
|
|
else condConcat
|
|
name (tail (tail list)) checker;
|
|
|
|
lazyGenericClosure = {startSet, operator}:
|
|
let
|
|
work = list: doneKeys: result:
|
|
if list == [] then
|
|
result
|
|
else
|
|
let x = head list; key = x.key; in
|
|
if elem key doneKeys then
|
|
work (tail list) doneKeys result
|
|
else
|
|
work (tail list ++ operator x) ([key] ++ doneKeys) ([x] ++ result);
|
|
in
|
|
work startSet [] [];
|
|
|
|
innerModifySumArgs = f: x: a: b: if b == null then (f a b) // x else
|
|
innerModifySumArgs f x (a // b);
|
|
modifySumArgs = f: x: innerModifySumArgs f x {};
|
|
|
|
|
|
innerClosePropagation = acc: xs:
|
|
if xs == []
|
|
then acc
|
|
else let y = head xs;
|
|
ys = tail xs;
|
|
in if ! isAttrs y
|
|
then innerClosePropagation acc ys
|
|
else let acc' = [y] ++ acc;
|
|
in innerClosePropagation
|
|
acc'
|
|
(uniqList { inputList = (maybeAttrNullable "propagatedBuildInputs" [] y)
|
|
++ (maybeAttrNullable "propagatedNativeBuildInputs" [] y)
|
|
++ ys;
|
|
acc = acc';
|
|
}
|
|
);
|
|
|
|
closePropagationSlow = list: (uniqList {inputList = (innerClosePropagation [] list);});
|
|
|
|
# This is an optimisation of closePropagation which avoids the O(n^2) behavior
|
|
# Using a list of derivations, it generates the full closure of the propagatedXXXBuildInputs
|
|
# The ordering / sorting / comparison is done based on the `outPath`
|
|
# attribute of each derivation.
|
|
# On some benchmarks, it performs up to 15 times faster than closePropagation.
|
|
# See https://github.com/NixOS/nixpkgs/pull/194391 for details.
|
|
closePropagationFast = list:
|
|
builtins.map (x: x.val) (builtins.genericClosure {
|
|
startSet = builtins.map (x: {
|
|
key = x.outPath;
|
|
val = x;
|
|
}) (builtins.filter (x: x != null) list);
|
|
operator = item:
|
|
if !builtins.isAttrs item.val then
|
|
[ ]
|
|
else
|
|
builtins.concatMap (x:
|
|
if x != null then [{
|
|
key = x.outPath;
|
|
val = x;
|
|
}] else
|
|
[ ]) ((item.val.propagatedBuildInputs or [ ])
|
|
++ (item.val.propagatedNativeBuildInputs or [ ]));
|
|
});
|
|
|
|
closePropagation = if builtins ? genericClosure
|
|
then closePropagationFast
|
|
else closePropagationSlow;
|
|
|
|
# calls a function (f attr value ) for each record item. returns a list
|
|
mapAttrsFlatten = f: r: map (attr: f attr r.${attr}) (attrNames r);
|
|
|
|
# attribute set containing one attribute
|
|
nvs = name: value: listToAttrs [ (nameValuePair name value) ];
|
|
# adds / replaces an attribute of an attribute set
|
|
setAttr = set: name: v: set // (nvs name v);
|
|
|
|
# setAttrMerge (similar to mergeAttrsWithFunc but only merges the values of a particular name)
|
|
# setAttrMerge "a" [] { a = [2];} (x: x ++ [3]) -> { a = [2 3]; }
|
|
# setAttrMerge "a" [] { } (x: x ++ [3]) -> { a = [ 3]; }
|
|
setAttrMerge = name: default: attrs: f:
|
|
setAttr attrs name (f (maybeAttr name default attrs));
|
|
|
|
# Using f = a: b = b the result is similar to //
|
|
# merge attributes with custom function handling the case that the attribute
|
|
# exists in both sets
|
|
mergeAttrsWithFunc = f: set1: set2:
|
|
foldr (n: set: if set ? ${n}
|
|
then setAttr set n (f set.${n} set2.${n})
|
|
else set )
|
|
(set2 // set1) (attrNames set2);
|
|
|
|
# merging two attribute set concatenating the values of same attribute names
|
|
# eg { a = 7; } { a = [ 2 3 ]; } becomes { a = [ 7 2 3 ]; }
|
|
mergeAttrsConcatenateValues = mergeAttrsWithFunc ( a: b: (toList a) ++ (toList b) );
|
|
|
|
# merges attributes using //, if a name exists in both attributes
|
|
# an error will be triggered unless its listed in mergeLists
|
|
# so you can mergeAttrsNoOverride { buildInputs = [a]; } { buildInputs = [a]; } {} to get
|
|
# { buildInputs = [a b]; }
|
|
# merging buildPhase doesn't really make sense. The cases will be rare where appending /prefixing will fit your needs?
|
|
# in these cases the first buildPhase will override the second one
|
|
# ! deprecated, use mergeAttrByFunc instead
|
|
mergeAttrsNoOverride = { mergeLists ? ["buildInputs" "propagatedBuildInputs"],
|
|
overrideSnd ? [ "buildPhase" ]
|
|
}: attrs1: attrs2:
|
|
foldr (n: set:
|
|
setAttr set n ( if set ? ${n}
|
|
then # merge
|
|
if elem n mergeLists # attribute contains list, merge them by concatenating
|
|
then attrs2.${n} ++ attrs1.${n}
|
|
else if elem n overrideSnd
|
|
then attrs1.${n}
|
|
else throw "error mergeAttrsNoOverride, attribute ${n} given in both attributes - no merge func defined"
|
|
else attrs2.${n} # add attribute not existing in attr1
|
|
)) attrs1 (attrNames attrs2);
|
|
|
|
|
|
# example usage:
|
|
# mergeAttrByFunc {
|
|
# inherit mergeAttrBy; # defined below
|
|
# buildInputs = [ a b ];
|
|
# } {
|
|
# buildInputs = [ c d ];
|
|
# };
|
|
# will result in
|
|
# { mergeAttrsBy = [...]; buildInputs = [ a b c d ]; }
|
|
# is used by defaultOverridableDelayableArgs and can be used when composing using
|
|
# foldArgs, composedArgsAndFun or applyAndFun. Example: composableDerivation in all-packages.nix
|
|
mergeAttrByFunc = x: y:
|
|
let
|
|
mergeAttrBy2 = { mergeAttrBy = mergeAttrs; }
|
|
// (maybeAttr "mergeAttrBy" {} x)
|
|
// (maybeAttr "mergeAttrBy" {} y); in
|
|
foldr mergeAttrs {} [
|
|
x y
|
|
(mapAttrs ( a: v: # merge special names using given functions
|
|
if x ? ${a}
|
|
then if y ? ${a}
|
|
then v x.${a} y.${a} # both have attr, use merge func
|
|
else x.${a} # only x has attr
|
|
else y.${a} # only y has attr)
|
|
) (removeAttrs mergeAttrBy2
|
|
# don't merge attrs which are neither in x nor y
|
|
(filter (a: ! x ? ${a} && ! y ? ${a})
|
|
(attrNames mergeAttrBy2))
|
|
)
|
|
)
|
|
];
|
|
mergeAttrsByFuncDefaults = foldl mergeAttrByFunc { inherit mergeAttrBy; };
|
|
mergeAttrsByFuncDefaultsClean = list: removeAttrs (mergeAttrsByFuncDefaults list) ["mergeAttrBy"];
|
|
|
|
# sane defaults (same name as attr name so that inherit can be used)
|
|
mergeAttrBy = # { buildInputs = concatList; [...]; passthru = mergeAttr; [..]; }
|
|
listToAttrs (map (n: nameValuePair n concat)
|
|
[ "nativeBuildInputs" "buildInputs" "propagatedBuildInputs" "configureFlags" "prePhases" "postAll" "patches" ])
|
|
// listToAttrs (map (n: nameValuePair n mergeAttrs) [ "passthru" "meta" "cfg" "flags" ])
|
|
// listToAttrs (map (n: nameValuePair n (a: b: "${a}\n${b}") ) [ "preConfigure" "postInstall" ])
|
|
;
|
|
|
|
nixType = x:
|
|
if isAttrs x then
|
|
if x ? outPath then "derivation"
|
|
else "attrs"
|
|
else if isFunction x then "function"
|
|
else if isList x then "list"
|
|
else if x == true then "bool"
|
|
else if x == false then "bool"
|
|
else if x == null then "null"
|
|
else if isInt x then "int"
|
|
else "string";
|
|
|
|
/**
|
|
# Deprecated
|
|
|
|
For historical reasons, imap has an index starting at 1.
|
|
|
|
But for consistency with the rest of the library we want an index
|
|
starting at zero.
|
|
*/
|
|
imap = imap1;
|
|
|
|
# Fake hashes. Can be used as hash placeholders, when computing hash ahead isn't trivial
|
|
fakeHash = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
|
|
fakeSha256 = "0000000000000000000000000000000000000000000000000000000000000000";
|
|
fakeSha512 = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000";
|
|
|
|
in
|
|
|
|
# Everything in this attrset is the public interface of the file.
|
|
{
|
|
inherit
|
|
checkFlag
|
|
checkReqs
|
|
closePropagation
|
|
closePropagationFast
|
|
closePropagationSlow
|
|
condConcat
|
|
defaultMerge
|
|
defaultMergeArg
|
|
fakeHash
|
|
fakeSha256
|
|
fakeSha512
|
|
foldArgs
|
|
getValue
|
|
ifEnable
|
|
imap
|
|
innerClosePropagation
|
|
innerModifySumArgs
|
|
lazyGenericClosure
|
|
mapAttrsFlatten
|
|
maybeAttr
|
|
maybeAttrNullable
|
|
maybeEnv
|
|
mergeAttrBy
|
|
mergeAttrByFunc
|
|
mergeAttrsByFuncDefaults
|
|
mergeAttrsByFuncDefaultsClean
|
|
mergeAttrsConcatenateValues
|
|
mergeAttrsNoOverride
|
|
mergeAttrsWithFunc
|
|
modifySumArgs
|
|
nixType
|
|
nvs
|
|
setAttr
|
|
setAttrMerge
|
|
uniqList
|
|
uniqListExt
|
|
;
|
|
}
|