feat: add --topic flag to load handler from xs store#37
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Load the request handler from a store topic instead of a file. When combined with -w, the server tails the topic and hot-reloads on updates. If the topic is empty, a 503 placeholder page is served with instructions for populating it via xs append. Also fixes -c to conflict with the script positional at the clap level and removes square brackets from the preamble options line.
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--topic
--topicruns the server with a handler closure stored on the xs stream instead of from a file. Requires--store.With
-w, the server tails the topic and reloads when it's updated:When the topic is empty, a placeholder closure serves a 503 with instructions. The placeholder lives at
examples/topic-placeholder.nuand is baked into the binary viainclude_str!.Other changes
-cnow conflicts withscriptat the clap level (was runtime only)src/store.rs; CLI args gated behind#[cfg(feature = "cross-stream")]file_source,stdin_source, andStore::topic_sourcefollow the same shape — send initial script, optionally spawn watcher