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https://github.com/idris-lang/Idris2.git
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Nix: make nixpkgs options overridable
This allows for cross-flake testing of content-addressible nix derivations without affecting other users of the flake (which would be the cases if CA-drvs would be hard-coded upstream) and without losing the ability to quickly update to the latest idris2 version (which would happen if a fork of the repo would be used). See also: https://discourse.nixos.org/t/content-addressed-nix-call-for-testers/12881 The flake can still be used as usual, but it will gain an output `overrideOptions`, which can be used like e.g. ```nix let idrisx = idris.overrideOptions { config.contentAddressedByDefault = true; }; in { ... } ```
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49
flake.nix
49
flake.nix
@ -8,26 +8,10 @@
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};
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outputs = { self, nixpkgs, flake-utils, idris-emacs-src }:
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let idris2-version = "0.4.0";
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in flake-utils.lib.eachDefaultSystem (system:
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let pkgs = import nixpkgs { inherit system; };
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idris2Pkg = pkgs.callPackage ./nix/package.nix {
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inherit idris2-version;
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srcRev = self.shortRev or "dirty";
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};
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text-editor = import ./nix/text-editor.nix { inherit pkgs idris-emacs-src idris2Pkg; };
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buildIdrisPkg = { projectName, src, idrisLibraries }:
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pkgs.callPackage ./nix/buildIdris.nix
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{ inherit src projectName idrisLibraries idris2-version; idris2 = idris2Pkg; };
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in if system != "aarch64-linux" then rec {
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checks = with pkgs; import ./nix/test.nix
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{ inherit nixpkgs flake-utils system stdenv runCommand lib; idris = self; };
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packages = rec {
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idris2 = idris2Pkg;
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} // text-editor;
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buildIdris = buildIdrisPkg;
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defaultPackage = packages.idris2;
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} else {}) // rec {
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let
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idris2-version = "0.4.0";
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lib = import ./nix/lib.nix;
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sys-agnostic = rec {
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templates.pkg = {
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path = ./nix/templates/pkg;
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description = "A custom Idris 2 package";
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@ -39,4 +23,29 @@
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defaultTemplate = templates.pkg;
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version = idris2-version;
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};
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per-system = { config ? { }, overlays ? [ ] }: system:
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let
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pkgs = import nixpkgs { inherit config system overlays; };
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idris2Pkg = pkgs.callPackage ./nix/package.nix {
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inherit idris2-version;
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srcRev = self.shortRev or "dirty";
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};
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buildIdris = { projectName, src, idrisLibraries }:
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pkgs.callPackage ./nix/buildIdris.nix
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{ inherit src projectName idrisLibraries idris2-version; idris2 = idris2Pkg; };
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in
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if system != "aarch64-linux" then rec {
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checks = import ./nix/test.nix {
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inherit (pkgs) system stdenv runCommand lib;
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inherit nixpkgs flake-utils;
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idris = self;
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};
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packages =
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{ idris2 = idris2Pkg; }
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// (import ./nix/text-editor.nix { inherit pkgs idris-emacs-src idris2Pkg; });
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inherit buildIdris;
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defaultPackage = packages.idris2;
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} else { };
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in
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lib.mkOvrOptsFlake (opts: flake-utils.lib.eachDefaultSystem (per-system opts) // sys-agnostic);
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}
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12
nix/lib.nix
Normal file
12
nix/lib.nix
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@ -0,0 +1,12 @@
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rec {
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# source: https://nixos.org/guides/nix-pills/override-design-pattern.html
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# but with the ability to change the name of the override method
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makeOverridable = kind: f:
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let inner = oldArgs: (f oldArgs) // { ${kind} = newArgs: inner (oldArgs // newArgs); };
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in inner;
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# create a flake with overridable options. useful because we can't pass
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# fine-grained overrides to flakes otherwise, we can only change inputs
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# (therefore, this can't change inputs per default, and that should also be unnecessary)
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mkOvrOptsFlake = flakefn: makeOverridable "overrideOptions" flakefn { };
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}
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