35 lines
1.2 KiB
Nix
35 lines
1.2 KiB
Nix
let
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lib = import <nixpkgs/lib>;
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gen = rec {
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# genAttrSets "a" ["hello" "world"]
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# [ { a = "hello"; } { a = "world"; } ]
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genAttrSets = (name: arr: (map (x: {${name}=x; })) arr);
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# addAttrSets "a" [1 2] {e=4;}
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# [ { a = 1; e = 4; } { a = 2; e = 4; } ]
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addAttrSets = (name: arr: set: (map (x: set // {${name}=x; })) arr);
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# attrToList {a=1;}
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# [ { name = "a"; value = 1; } ]
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attrToList = (set: map (name: {name=name; value=set.${name};} ) (builtins.attrNames set));
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# mergeConfig [{e=1;}] {name="a"; value=[1 2]
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# [ { a = 1; e = 1; } { a = 2; e = 1; } ]
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mergeConfig = (arr: new: lib.flatten ( map (x: addAttrSets new.name new.value x) arr));
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# genConfigs {a=[1 2]; b=[3 4];}
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# [ { a = 1; b = 3; } { a = 1; b = 4; } { a = 2; b = 3; } { a = 2; b = 4; } ]
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genConfigs = (config: lib.foldl mergeConfig [{}] (attrToList config));
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# Generate multiple app versions by override with each config
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genApp = (app: configs: map (conf: app.override conf // {conf=conf;}) configs);
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# Generate app version from an array of apps
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genApps = (apps: configs:
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lib.flatten (map (app: genApp app configs) apps));
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};
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in
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gen
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