From dfb73342a094871a54185d90841430be087e109c Mon Sep 17 00:00:00 2001
From: Martin Fischer <martin@push-f.com>
Date: Fri, 29 Nov 2024 08:01:14 +0100
Subject: refactor: switch to npins

niv is written in Haskell, while npins is written in Rust. I'm more
comfortable with Rust. npins also seems more actively maintained.

The files in npins/ were generated with:

    nix-shell -p npins
    npins init --bare
    npins add --name nixos channel nixos-24.05
---
 nixos/npins/default.nix  | 80 ++++++++++++++++++++++++++++++++++++++++++++++++
 nixos/npins/sources.json | 11 +++++++
 2 files changed, 91 insertions(+)
 create mode 100644 nixos/npins/default.nix
 create mode 100644 nixos/npins/sources.json

(limited to 'nixos/npins')

diff --git a/nixos/npins/default.nix b/nixos/npins/default.nix
new file mode 100644
index 0000000..5e7d086
--- /dev/null
+++ b/nixos/npins/default.nix
@@ -0,0 +1,80 @@
+# Generated by npins. Do not modify; will be overwritten regularly
+let
+  data = builtins.fromJSON (builtins.readFile ./sources.json);
+  version = data.version;
+
+  mkSource =
+    spec:
+    assert spec ? type;
+    let
+      path =
+        if spec.type == "Git" then
+          mkGitSource spec
+        else if spec.type == "GitRelease" then
+          mkGitSource spec
+        else if spec.type == "PyPi" then
+          mkPyPiSource spec
+        else if spec.type == "Channel" then
+          mkChannelSource spec
+        else
+          builtins.throw "Unknown source type ${spec.type}";
+    in
+    spec // { outPath = path; };
+
+  mkGitSource =
+    {
+      repository,
+      revision,
+      url ? null,
+      hash,
+      branch ? null,
+      ...
+    }:
+    assert repository ? type;
+    # At the moment, either it is a plain git repository (which has an url), or it is a GitHub/GitLab repository
+    # In the latter case, there we will always be an url to the tarball
+    if url != null then
+      (builtins.fetchTarball {
+        inherit url;
+        sha256 = hash; # FIXME: check nix version & use SRI hashes
+      })
+    else
+      assert repository.type == "Git";
+      let
+        urlToName =
+          url: rev:
+          let
+            matched = builtins.match "^.*/([^/]*)(\\.git)?$" 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
+      builtins.fetchGit {
+        url = repository.url;
+        rev = revision;
+        inherit name;
+        # hash = hash;
+      };
+
+  mkPyPiSource =
+    { url, hash, ... }:
+    builtins.fetchurl {
+      inherit url;
+      sha256 = hash;
+    };
+
+  mkChannelSource =
+    { url, hash, ... }:
+    builtins.fetchTarball {
+      inherit url;
+      sha256 = hash;
+    };
+in
+if version == 3 then
+  builtins.mapAttrs (_: mkSource) data.pins
+else
+  throw "Unsupported format version ${toString version} in sources.json. Try running `npins upgrade`"
diff --git a/nixos/npins/sources.json b/nixos/npins/sources.json
new file mode 100644
index 0000000..2deef59
--- /dev/null
+++ b/nixos/npins/sources.json
@@ -0,0 +1,11 @@
+{
+  "pins": {
+    "nixos": {
+      "type": "Channel",
+      "name": "nixos-24.05",
+      "url": "https://releases.nixos.org/nixos/24.05/nixos-24.05.6668.e8c38b73aeb2/nixexprs.tar.xz",
+      "hash": "0lhh36z3fvd3b64dz7an08y3c3shb67aj17ny9z28bs21i3dc5yh"
+    }
+  },
+  "version": 3
+}
\ No newline at end of file
-- 
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