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ci(nix): harden Update Nix hashes against cache.nixos.org HTTP/2 flakes #209

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Merged
adibhanna merged 1 commit into from
Jun 19, 2026
Merged

ci(nix): harden Update Nix hashes against cache.nixos.org HTTP/2 flakes #209

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18 changes: 14 additions & 4 deletions .github/workflows/nix-update.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,16 @@ permissions:
jobs:
update:
runs-on: ubuntu-latest
env:
# cache.nixos.org intermittently corrupts NAR streams over HTTP/2 (seen as
# "Stream error in the HTTP/2 framing layer" -> zstd corruption). Disable
# HTTP/2 to dodge the bug and retry a few times on transient drops; every
# nix command below also passes --fallback so an unusable substitute builds
# from source instead of failing the run.
NIX_CONFIG: |
http2 = false
download-attempts = 5
connect-timeout = 20
steps:
- uses: actions/checkout@v4

Expand All @@ -34,13 +44,13 @@ jobs:
FAKE="sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA="

# 1) Source hash — the fetchFromGitHub tree for tag v$V.
SRC_HASH=$(nix run nixpkgs#nix-prefetch-github -- ZenNotes zennotes --rev "v$V" | jq -r '.hash // .sha256')
SRC_HASH=$(nix run --fallback nixpkgs#nix-prefetch-github -- ZenNotes zennotes --rev "v$V" | jq -r '.hash // .sha256')
echo "hash (source) = $SRC_HASH"

# 2) npmDepsHash — from the tag's root package-lock.json (npm workspaces
# use one root lockfile, which is what buildNpmPackage hashes).
curl -fsSL "https://raw.githubusercontent.com/ZenNotes/zennotes/v$V/package-lock.json" -o /tmp/package-lock.json
NPM_HASH=$(nix run nixpkgs#prefetch-npm-deps -- /tmp/package-lock.json)
NPM_HASH=$(nix run --fallback nixpkgs#prefetch-npm-deps -- /tmp/package-lock.json)
echo "npmDepsHash = $NPM_HASH"

# Write version + source + npm now; leave vendorHash fake so the Go
Expand All @@ -52,7 +62,7 @@ jobs:
# 3) vendorHash — build the server; the Go vendor fixed-output derivation
# reports the real hash as a mismatch against the fake one.
set +e
nix build .#zennotes-server --no-link 2> build.log
nix build --fallback .#zennotes-server --no-link 2> build.log
set -e
VENDOR_HASH=$(grep -oE 'got:[[:space:]]+sha256-[A-Za-z0-9+/=]+' build.log \
| grep -oE 'sha256-[A-Za-z0-9+/=]+' | head -1 || true)
Expand All @@ -69,7 +79,7 @@ jobs:
cat "$DATA"

- name: Verify the packages build with the new hashes
run: nix build .#zennotes-desktop .#zennotes-server --no-link --print-build-logs
run: nix build --fallback .#zennotes-desktop .#zennotes-server --no-link --print-build-logs

- name: Open a PR with the update
uses: peter-evans/create-pull-request@v6
Expand Down