51 lines
1.7 KiB
Nix
51 lines
1.7 KiB
Nix
{ core-inputs
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, user-inputs
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, snowfall-lib
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}:
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let
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inherit (core-inputs.nixpkgs.lib) assertMsg foldl;
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user-shells-root = snowfall-lib.fs.get-file "shells";
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in
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{
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shell = {
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# Create flake output packages.
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# Type: Attrs -> Attrs
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# Usage: create-shells { inherit channels; src = ./my-shells; overrides = { inherit another-shell; default = "my-shell"; }; }
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# result: { another-shell = ...; my-shell = ...; default = ...; }
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create-shells =
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{ channels
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, src ? user-shells-root
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, overrides ? { }
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}:
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let
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user-shells = snowfall-lib.fs.get-default-nix-files-recursive src;
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create-shell-metadata = shell:
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{
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name = builtins.unsafeDiscardStringContext (snowfall-lib.path.get-parent-directory shell);
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drv = channels.nixpkgs.callPackage shell {
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lib = snowfall-lib.internal.system-lib;
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};
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};
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shells-metadata = builtins.map create-shell-metadata user-shells;
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merge-shells = shells: metadata:
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shells // {
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${metadata.name} = metadata.drv;
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};
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shells-without-default = foldl merge-shells { } shells-metadata;
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default-shell =
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if overrides.default or null == null then
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{ }
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else if builtins.isAttrs overrides.default then
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{ default = overrides.default; }
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else if shells-without-default.${overrides.default} or null != null then
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{ default = shells-without-default.${overrides.default}; }
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else
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{ };
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overrides-without-default = builtins.removeAttrs overrides [ "default" ];
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shells = shells-without-default // default-shell // overrides-without-default;
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in
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shells;
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};
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}
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