gateway_nginx.rs reads HIVE_AGENT_FRONTEND_DIR (injected by hive-c0re.nix
as ${cfg.frontend}/agent). When set, agents.conf emits per-agent split
blocks instead of the old single proxy_pass:
# Compiled assets — immutable nix store path, cache 1y
location ^~ /agent/<name>/static/ {
alias <frontend>/static/;
expires 1y; add_header Cache-Control "public, immutable, ...";
}
# Static dist + proxy fallback
location /agent/<name>/ {
alias <frontend>/;
try_files $uri $uri.html $uri/index.html @<name>_dynamic;
}
location @<name>_dynamic {
proxy_pass <upstream>; # api, events, icon, login, …
…proxy headers unchanged…
}
try_files path resolution (nginx applies alias mapping first):
$uri — exact file (/static/app.js → static/app.js)
$uri.html — bare-path fallback (/stats → stats.html)
$uri/index.html — directory index (/ → index.html)
@<name>_dynamic — proxy catchall for anything not in the dist
Adding pages to the frontend dist works automatically — no generator
change needed. Per-agent extraFiles (in mergedDist, not in the base
nix-store path) continue to proxy to the agent daemon.
frontend is a nix store path injected at build time — only [a-z0-9/._-],
no shell metacharacters — safe to interpolate without sanitization;
comment added documenting this assumption.
Without HIVE_AGENT_FRONTEND_DIR the existing single-proxy block is
emitted unchanged — backward-compatible for deployments without the env.
render() takes frontend_dir as a parameter so tests exercise both code
paths safely in parallel. 13 tests: 7 legacy, 6 split-mode. No clippy
warnings in changed files.
nix/modules/hive-c0re.nix: inject HIVE_AGENT_FRONTEND_DIR = "${cfg.frontend}/agent".
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