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docs(nix): document lib.mkWebapp in branding/README + CLAUDE.md

Browse source 
branding/README's "Integration with NixOS deployment" section now
describes the actual lib.mkWebapp API + the per-host call site, with
a ready-to-paste server-deploy snippet. Also documents the pnpm_10
pin, sharp/autoPatchelfHook handling, and CI=true bypass — anchors
that surface in error logs and benefit from being grep-able.

CLAUDE.md's NixOS deployment paragraph stops calling lib.mkWebapp a
future TODO and points at the API directly.

Adds a `nix build` recipe (default + impure brand override) for local
sanity-checking.

Part of aiolabs/webapp#97.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Padreug 2026-06-10 10:46:17 +02:00
commit 0ede6f70db
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29
branding/README.md
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@ -105,6 +105,33 @@ Outputs land in `public/icons/` (gitignored).
## Integration with NixOS deployment
See [aiolabs/webapp#95](https://git.atitlan.io/aiolabs/webapp/issues/95) for the full architecture. In short: `deploy/server-deploy/hosts/<host>/branding/` will hold per-host brands, and each host's `services/webapp.nix` will call `inputs.webapp.lib.mkWebapp { brandDir = ./../branding; }` once `lib.mkWebapp` is exposed from `flake.nix` (separate follow-up issue).
`flake.nix` exposes `lib.mkWebapp { pkgs, brandDir ? ./branding/default, app ? "main" }` for downstream consumers. Per-host wiring in `deploy/server-deploy/hosts/<host>/services/webapp.nix` looks like:
```nix
{ inputs, pkgs, ... }:
{
services.webapp.apps = {
main = inputs.webapp.lib.mkWebapp { inherit pkgs; brandDir = ./../branding; };
events = inputs.webapp.lib.mkWebapp { inherit pkgs; brandDir = ./../branding; app = "events"; };
wallet = inputs.webapp.lib.mkWebapp { inherit pkgs; brandDir = ./../branding; app = "wallet"; };
};
}
```
`brandDir` is either a path inside this flake (`./branding/<name>`) or an external path (e.g. `./../branding` from server-deploy). Either way Nix copies it into the build sandbox.
Builder details:
- Uses `pkgs.pnpm_10` regardless of consumer's nixpkgs, so the pnpmDeps hash stays stable across downstream nixpkgs versions.
- `pkgs.autoPatchelfHook` + `stdenv.cc.cc.lib` patch the prebuilt `@img/sharp-libvips-linux-*` binaries.
- `CI=true` bypasses pnpm 10's interactive modules-purge prompt in the sandbox.
The architectural payoff: brand and code become independent axes. Logo changes ship via server-deploy commits + redeploys — no webapp release, no `flake.lock` bump.
For local sanity:
```bash
nix build .#main # hub with aiolabs default brand
nix build .#events # events standalone with aiolabs default
# events with a custom brand (the impure way, ad-hoc):
nix build --impure --expr 'let pkgs = import <nixpkgs> {}; flake = builtins.getFlake (toString ./.); in flake.lib.mkWebapp { inherit pkgs; brandDir = /path/to/brand; app = "events"; }'
```