alexion
8622b35f48
Add the content tier: a standalone flake that auto-discovers each skill (a directory containing a SKILL.md, at any depth) and exposes it as an individually addressable derivation built by lib.mkSkill. Directories without a SKILL.md are descended through as cosmetic containers; once a SKILL.md is found, that directory's subfolders are its assets, not further skills. Skill names must be globally unique across the tree — a collision is a hard eval-time error, not a warning. A fixture-driven skill-build check under `nix flake check` exercises the recursive walk, the builder, the SKILL.md-at-$out-root contract, the eval-time name passthru, and the collision error. The repo ships no real skill content yet, so packages.<system> is empty today.
43 lines
1.3 KiB
Nix
43 lines
1.3 KiB
Nix
# Recursive skill discovery: one `{ name; src; }` per skill in a source tree.
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lib: root:
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let
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walk =
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dir:
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let
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subdirs = lib.filterAttrs (_: type: type == "directory") (builtins.readDir dir);
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in
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lib.concatLists (
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lib.mapAttrsToList (
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entryName: _:
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let
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child = dir + "/${entryName}";
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in
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# A directory with a SKILL.md is a skill, and its subdirectories are
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# that skill's assets rather than nested skills, so the walk stops here.
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# A directory without one is a cosmetic container to recurse through.
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if (builtins.readDir child) ? "SKILL.md" then
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[
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{
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name = entryName;
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src = child;
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}
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]
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else
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walk child
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) subdirs
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);
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found = walk root;
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names = map (s: s.name) found;
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duplicates = lib.unique (lib.filter (n: lib.count (x: x == n) names > 1) names);
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in
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if duplicates != [ ] then
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throw ''
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Skill name collision: ${lib.concatStringsSep ", " duplicates}.
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Two or more skills under ${toString root} resolve to the same name.
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A skill's name is its leaf directory name and must be globally unique
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across the whole tree, independent of the cosmetic folders above it.
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Rename one of the colliding skills.''
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else
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found
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