106 lines
2.1 KiB
Nix
106 lines
2.1 KiB
Nix
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# This expression returns a list of all fetchurl calls used by ‘expr’.
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{
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expr,
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lib ? import ../../lib,
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}:
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let
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inherit (lib)
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addErrorContext
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attrNames
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concatLists
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const
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filter
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genericClosure
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isAttrs
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isDerivation
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isList
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mapAttrsToList
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optional
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optionals
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;
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root = expr;
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uniqueFiles = map (x: x.file) (genericClosure {
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startSet = map (file: {
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key = with file; (if type == null then "" else type + "+") + hash;
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inherit file;
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}) files;
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operator = const [ ];
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});
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files = map (drv: {
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urls = drv.urls or [ drv.url ];
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hash = drv.outputHash;
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isPatch = (drv ? postFetch && drv.postFetch != "");
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type = drv.outputHashAlgo;
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name = drv.name;
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}) fetchurlDependencies;
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fetchurlDependencies = filter (
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drv:
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drv.outputHash or "" != "" && drv.outputHashMode or "flat" == "flat" && (drv ? url || drv ? urls)
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) dependencies;
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dependencies = map (x: x.value) (genericClosure {
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startSet = map keyDrv (derivationsIn' root);
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operator = { key, value }: map keyDrv (immediateDependenciesOf value);
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});
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derivationsIn' =
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x:
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if !canEval x then
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[ ]
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else if isDerivation x then
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optional (canEval x.drvPath) x
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else if isList x then
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concatLists (map derivationsIn' x)
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else if isAttrs x then
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concatLists (
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mapAttrsToList (n: v: addErrorContext "while finding tarballs in '${n}':" (derivationsIn' v)) x
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)
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else
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[ ];
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keyDrv =
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drv:
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if canEval drv.drvPath then
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{
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key = drv.drvPath;
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value = drv;
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}
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else
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{ };
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immediateDependenciesOf =
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drv:
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concatLists (
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mapAttrsToList (n: v: derivationsIn v) (
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removeAttrs drv (
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[
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"meta"
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"passthru"
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]
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++ optionals (drv ? passthru) (attrNames drv.passthru)
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)
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)
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);
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derivationsIn =
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x:
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if !canEval x then
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[ ]
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else if isDerivation x then
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optional (canEval x.drvPath) x
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else if isList x then
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concatLists (map derivationsIn x)
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else
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[ ];
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canEval = val: (builtins.tryEval val).success;
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in
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uniqueFiles
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