treewide: Use nixpkgs fetchers for npins

plugins: switch from neodev to lazydev

npins/sources.nix

@@ -0,0 +1,85 @@
+# Based off of:
+# https://github.com/NixOS/nixpkgs/blob/776c3bee4769c616479393aeefceefeda16b6fcb/pkgs/tools/nix/npins/source.nix
+{
+  lib,
+  fetchurl,
+  fetchgit,
+  fetchzip,
+}:
+builtins.mapAttrs
+(
+  _: let
+    getZip = {
+      url,
+      hash,
+      ...
+    }:
+      fetchzip {
+        inherit url;
+        sha256 = hash;
+        extension = "tar";
+      };
+    mkGitSource = {
+      repository,
+      revision,
+      url ? null,
+      hash,
+      ...
+    } @ attrs:
+      assert repository ? type;
+        if url != null
+        then getZip attrs
+        else
+          assert repository.type == "Git"; let
+            urlToName = url: rev: let
+              matched = builtins.match "^.*/([^/]*)(\\.git)?$" repository.url;
+              short = builtins.substring 0 7 rev;
+              appendShort =
+                if (builtins.match "[a-f0-9]*" rev) != null
+                then "-${short}"
+                else "";
+            in "${
+              if matched == null
+              then "source"
+              else builtins.head matched
+            }${appendShort}";
+            name = urlToName repository.url revision;
+          in
+            fetchgit {
+              inherit name;
+              inherit (repository) url;
+              rev = revision;
+              sha256 = hash;
+            };
+
+    mkPyPiSource = {
+      url,
+      hash,
+      ...
+    }:
+      fetchurl {
+        inherit url;
+        sha256 = hash;
+      };
+  in
+    spec:
+      assert spec ? type; let
+        func =
+          {
+            Git = mkGitSource;
+            GitRelease = mkGitSource;
+            PyPi = mkPyPiSource;
+            Channel = getZip;
+          }
+          .${spec.type}
+          or (builtins.throw "Unknown source type ${spec.type}");
+      in
+        spec // {outPath = func spec;}
+)
+(
+  let
+    json = lib.importJSON ./sources.json;
+  in
+    assert lib.assertMsg (json.version == 3) "Npins version mismatch!";
+      json.pins
+)