templates/flake.nix

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{
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description = "Templates of the Sieve of Eratosthenes implemented in various languages";
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outputs = { self, ... }:
let
# Get all project directories
subdirs = dir:
let sub = builtins.readDir dir;
in builtins.filter
(d: sub.${d} == "directory")
(builtins.attrNames sub);
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vowelStart = str: builtins.elem (builtins.substring 0 1 str) [ "a" "e" "i" "o" "u" ];
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concatMapAttrs = func: attr:
builtins.foldl' (x: y: x // y) {}
(builtins.map func attr);
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templateDirs =
builtins.concatMap (lang:
builtins.map
(pkg: { inherit lang pkg; })
(subdirs ./${lang}))
(subdirs ./.);
in {
templates = concatMapAttrs ({ lang, pkg }: {
"${lang}-${pkg}" = {
description = "Packaging a${if vowelStart lang
then "n"
else ""} ${lang} executable using ${pkg}";
path = builtins.filterSource
(path: type: builtins.baseNameOf path != "flake.lock")
./${lang}/${pkg};
};
}) templateDirs // concatMapAttrs (lang: {
"${lang}" = self.templates."${lang}-nixpkgs" // {
description = "Packaging a${if vowelStart lang
then "n"
else ""} ${lang} executable";
};
}) (subdirs ./.);
};
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}