dogfood nixtamal

5 files changed, 121 insertions, 5 deletions

diff --git a/nix/tamal/.editorconfig b/nix/tamal/.editorconfig
new file mode 100644
index 0000000..d029f52
--- /dev/null
+++ b/nix/tamal/.editorconfig
@@ -0,0 +1,8 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_style = tab
+insert_final_newline = true
+trim_trailing_whitespace = true
diff --git a/nix/tamal/default.nix b/nix/tamal/default.nix
new file mode 100644
index 0000000..dcebfbd
--- /dev/null
+++ b/nix/tamal/default.nix
@@ -0,0 +1,97 @@
+/*
+SPDX-FileCopyrightText: 2025 toastal
+SPDX-License-Identifier: ISC
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice & this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED “AS IS” & ISC DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY &
+FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT,
+OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+OF THIS SOFTWARE.
+
+──────────────────────────────────────────────────────────────────────────────
+This file was generated by Nixtamal. Do not edit as it will be overwritten.
+──────────────────────────────────────────────────────────────────────────────
+*/
+{
+	system ? builtins.currentSystem,
+	nixpkgs ? null,
+	bootstrap-nixpkgs-lock-name ? null,
+}:
+
+let lock = builtins.fromJSON (builtins.readFile ./lock.json); in
+assert (lock.v == "0.1.0");
+let
+	try-fetch = name: fetcher:
+		let
+			try-fetch' = failed-urls: url: urls:
+				let result = builtins.tryEval (fetcher url); in
+				if result.success then
+					result.value
+				else
+					let failed-urls' = [ url ] ++ failed-urls; in
+					if builtins.length urls <= 0 then
+						let fus = builtins.concatStringsSep " " failed-urls'; in
+						builtins.throw "Input 「${name}」 fetchable 
+[ ${fus} ]"
+					else
+						try-fetch' failed-urls' (builtins.head urls) (builtins.tail urls);
+		in
+		try-fetch' [ ];
+
+	builtin-fetch-tarball = {name, kind, hash}:
+		try-fetch name (url:
+			builtins.fetchTarball {
+				inherit url;
+				${hash.al} = hash.vl;
+			}
+		) kind.ur kind.ms;
+
+	builtin-to-input = name: input:
+		let k = builtins.head input.kd; in
+		if k == 1 then
+ 			builtin-fetch-tarball {
+ 				inherit name;
+ 				kind = builtins.elemAt input.kd 1;
+ 				hash = input.ha;
+ 			}
+		else
+			throw "Unsupported input kind “${builtins.toString k}”.";
+
+	nixpkgs' = if builtins.isNull nixpkgs then
+		builtin-to-input "nixpkgs-for-nixtamal" (
+			if builtins.isString bootstrap-nixpkgs-lock-name then
+				lock.i.${bootstrap-nixpkgs-lock-name}
+			else
+				lock.i.nixpkgs-nixtamal or lock.i.nixpkgs
+		)
+	else
+		nixpkgs;
+
+	pkgs = import nixpkgs' {inherit system;};
+
+	inherit (pkgs) lib;
+
+	fetch-zip = {name, kind, hash}: pkgs.fetchzip {
+		inherit name;
+		url = kind.ur;
+		${hash.al} = hash.vl;
+	} // lib.optionalAttrs (builtins.length kind.ms > 0) { urls = kind.ms; };
+
+	to-input = name: input:
+		let k = builtins.head input.kd; in
+		if k == 1 then
+ 			fetch-zip {
+ 				inherit name;
+ 				kind = builtins.elemAt input.kd 1;
+ 				hash = input.ha;
+ 			}
+		else
+			throw "Unsupported input kind “${builtins.toString k}”.";
+in
+builtins.mapAttrs to-input lock.i
diff --git a/nix/tamal/lock.json b/nix/tamal/lock.json
new file mode 100644
index 0000000..a4dffa1
--- /dev/null
+++ b/nix/tamal/lock.json
@@ -0,0 +1 @@
+{"v":"0.1.0","i":{"nixpkgs":{"kd":[1,{"ur":"https://github.com/NixOS/nixpkgs/archive/677fbe97984e7af3175b6c121f3c39ee5c8d62c9.tar.gz","ms":[]}],"ha":{"al":"sha256","vl":"1cfnwpvk5x3p5vxkvykzgffy9r3a7via6w4c8yk8rfsa2hrbhrl3"},"lv":"677fbe97984e7af3175b6c121f3c39ee5c8d62c9"}}}
\ No newline at end of file
diff --git a/nix/tamal/manifest.kdl b/nix/tamal/manifest.kdl
new file mode 100644
index 0000000..236392a
--- /dev/null
+++ b/nix/tamal/manifest.kdl
@@ -0,0 +1,13 @@
+version "0.1.0"
+inputs {
+	nixpkgs {
+		archive {
+			url "https://github.com/NixOS/nixpkgs/archive/{{cmd_value}}.tar.gz"
+		}
+		latest-cmd {
+			$ git ls-remote --heads "https://github.com/NixOS/nixpkgs.git" --refs "refs/heads/nixpkgs-unstable"
+			| cut -f1
+		}
+	}
+}
+
diff --git a/release.nix b/release.nix
index 4d9b6b9..0e2ad6a 100644
--- a/release.nix
+++ b/release.nix
@@ -3,12 +3,9 @@
 # SPDX-License-Identifier: LGPL-2.1-or-later                                   │
 #──────────────────────────────────────────────────────────────────────────────┘
 let
-   pkgs_src = builtins.fetchTarball {
-      url = "https://github.com/NixOS/nixpkgs/archive/bd88d6c13ab85cc842b93d53f68d6d40412e5a18.tar.gz";
-      sha256 = "0nxk7d12y1zq7rbfjkspprbh2wac61cjsjaidc94gpv9bd0pbsja";
-   };
+   inputs = import ./nix/tamal { };
 
-   pkgs = import pkgs_src {
+   pkgs = import inputs.nixpkgs {
       overlays = [
          (import ./nix/overlay/default.nix)
          (import ./nix/overlay/development.nix)