Re: [Nix-dev] concatAttrs :: [attrSet] -> attrSet ?

Hello Daniel, Thus quoth Daniel Peebles at 13:58 on Tue, May 30 2017: > > My favorite interface for this type of operation is from Haskell's > Data.Map, in pseudo-Haskell notation: > > unionWithKey : (String -> a -> a -> a) -> Attrs a -> Atrs a -> Attrs a Right, that's exactly the kind of

Re: [Nix-dev] concatAttrs :: [attrSet] -> attrSet ?

My favorite interface for this type of operation is from Haskell's Data.Map, in pseudo-Haskell notation: unionWithKey : (String -> a -> a -> a) -> Attrs a -> Atrs a -> Attrs a unionWith : (a -> a -> a) -> Attrs a -> Attrs a -> Attrs a unionWith = f: unionWithKey (_: f) This should be sufficient

Re: [Nix-dev] concatAttrs :: [attrSet] -> attrSet ?

Hello Tomasz, Domen, and Volth, Thus quoth Tomasz Czyż at 13:26 on Mon, May 29 2017: > > https://github.com/NixOS/nixpkgs/blob/master/lib/attrsets.nix#L413 is also > handy > > 2017-05-29 13:36 GMT+01:00 Domen Kožar : > >> mkMerge can be used only with NixOS modules. >> >> I do

Re: [Nix-dev] concatAttrs :: [attrSet] -> attrSet ?

Hello Domen, Thus quoth Domen Kožar at 12:16 on Mon, May 29 2017: > > Note that this will fail if you'll nest the attributes, one will override > the other. > > nix-repl> :p concatAttrs [ {x={a =3;};} {x={ b= 4;};} ] > { x = { b = 4; }; } Sure, that seems to follow naturally from the semantics

Re: [Nix-dev] concatAttrs :: [attrSet] -> attrSet ?

https://github.com/NixOS/nixpkgs/blob/master/lib/attrsets.nix#L413 is also handy 2017-05-29 13:36 GMT+01:00 Domen Kožar : > mkMerge can be used only with NixOS modules. > > I do remember some recursive merge function, but can't find it now. > > On Mon, May 29, 2017 at 2:29 PM,

Re: [Nix-dev] concatAttrs :: [attrSet] -> attrSet ?

mkMerge can be used only with NixOS modules. I do remember some recursive merge function, but can't find it now. On Mon, May 29, 2017 at 2:29 PM, Volth wrote: > there is also lib.mkMerge to handle nested attrs > > On 5/29/17, Domen Kožar wrote: > > Note that

Re: [Nix-dev] concatAttrs :: [attrSet] -> attrSet ?

there is also lib.mkMerge to handle nested attrs On 5/29/17, Domen Kožar wrote: > Note that this will fail if you'll nest the attributes, one will override > the other. > > nix-repl> :p concatAttrs [ {x={a =3;};} {x={ b= 4;};} ] > { x = { b = 4; }; } > > > On Sun, May 28, 2017 at

Re: [Nix-dev] concatAttrs :: [attrSet] -> attrSet ?

Note that this will fail if you'll nest the attributes, one will override the other. nix-repl> :p concatAttrs [ {x={a =3;};} {x={ b= 4;};} ] { x = { b = 4; }; } On Sun, May 28, 2017 at 5:23 PM, Sergiu Ivanov wrote: > Hey Leo, > > Thus quoth Leo Gaspard at 13:05 on Sun,

Re: [Nix-dev] concatAttrs :: [attrSet] -> attrSet ?

Hey Leo, Thus quoth Leo Gaspard at 13:05 on Sun, May 28 2017: > On 05/28/2017 02:58 PM, Sergiu Ivanov wrote: >> My use case is quite specific. I do this, approximately: >> >> let func name = { "${name}" = something name; }; >> in concatAttrs (map func [ "name1" "name2" ]) > > If this is

Re: [Nix-dev] concatAttrs :: [attrSet] -> attrSet ?

On 05/28/2017 02:58 PM, Sergiu Ivanov wrote: > My use case is quite specific. I do this, approximately: > > let func name = { "${name}" = something name; }; > in concatAttrs (map func [ "name1" "name2" ]) If this is your use case, you could also be interested in `genAttrs` defined in

Re: [Nix-dev] concatAttrs :: [attrSet] -> attrSet ?

Hello Linus, Thank you for you prompt reply! Thus quoth Linus Heckemann at 12:24 on Sun, May 28 2017: > On 28/05/17 13:18, Sergiu Ivanov wrote: >> >> concatAttrs = attrList: pkgs.lib.fold (x: y: x // y) {} attrList; >> >> Do you see any isssues with such an implementation? >> > > Looks like a

Re: [Nix-dev] concatAttrs :: [attrSet] -> attrSet ?

On 28/05/17 13:18, Sergiu Ivanov wrote: > Hello, > > I found myself in the need of a function which would take a list of > Nix attribute sets and concatenate them to produce one big attribute > set: > > nix-repl> concatAttrs [ {x=1;} {y=2;} ] > {x=1; y=2;} > > I did quite some research online

[Nix-dev] concatAttrs :: [attrSet] -> attrSet ?

Hello, I found myself in the need of a function which would take a list of Nix attribute sets and concatenate them to produce one big attribute set: nix-repl> concatAttrs [ {x=1;} {y=2;} ] {x=1; y=2;} I did quite some research online and in nixpkgs source tree and found a lot of cool