release: nix flake with tag-pinned hashes, reproducible tarballs (milestone 40)

flake.nix fetches the release tarballs and carries their SRI hashes in a generated block. The cut tool builds the release locally with the toolchain gates.yml pins, in a normalized nine-variable environment, writes the hashes into flake.nix, and commits it with build.zig.zon as the single bump commit. The package job verifies the pins on the bump commit and the publish job verifies them again on the tag, before anything is uploaded.

The tarballs are written by dist_stage (std.tar.Writer, flate gzip) instead of the runner's tar and gzip, and -ffile-prefix-map keeps checkout paths out of the C objects; two checkouts at different absolute paths produce byte-identical archives. nxdns version, /api/version and the admin footer report the version only: the bump commit cannot know its own sha.
This commit is contained in:
2026-09-08 21:45:22 +02:00
parent 3e57f43e08
commit 22abcd9b7b
41 changed files with 1739 additions and 135 deletions
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@@ -4,6 +4,18 @@ All notable changes to nxdns are recorded here. The format follows [Keep a Chang
Sections are written by hand. Nothing here is generated from commit messages: the point of the file is to say what changed for an operator, which a commit subject rarely does.
## [Unreleased]
### Added
- **A Nix flake with tag-pinned hashes.** `flake.nix` at the repository root builds `nxdns` for `aarch64-linux` and `x86_64-linux` from the release tarballs, and carries their hashes in a generated block. A consumer pins the flake to a release tag and gets the exact bytes that tag published; `docs/how-to/install-with-nix.md` covers the input, the `nixpkgs` follows line, and Renovate.
### Changed
- **The release archive is written by the project's own tool.** `zig build dist` no longer shells out to the runner's `tar` and `gzip`; it writes the tar stream and the gzip container itself, with sorted entries, fixed modes, and zero timestamps. The tarball bytes now depend on the source tree, the compiler, and the admin bundle, and on nothing the host supplies — which is what lets a hash be pinned before CI rebuilds it.
- **The cut pins the release hashes before it commits.** `zig build cut` asserts the local Node, npm, and Zig match the versions CI pins, builds the release from the bumped manifest in a normalized environment, writes the resulting hashes into `flake.nix`, and commits that file alongside `build.zig.zon` as one commit. CI reverifies the pins on the bump commit and again on the tag, before anything is uploaded.
- **`nxdns version` no longer reports a git commit.** The commit is gone from the command's output, from `GET /api/version`, and from the admin footer, which now shows `nxdns v<version>`. A release identifies itself by version, and the bytes are reproducible from the tag, so a commit embedded in the binary told a reader nothing the tag did not.
## [0.0.16] - 2026-09-07
The Overview page is redesigned around the two dashboards people already know — Pi-hole's layout, NextDNS's charts — and every number in the admin is spelled one way.