ClojureWasm Bookshelf

A small multi-user bookshelf — register with Google, build your shelf, browse others — served end-to-end by ClojureWasm (cljw), a from-scratch Clojure runtime in Zig, no JVM. It is a "serverless-style" demo: one self-contained binary serving an SPA + JSON API, with SQLite and book-cover colours running in-process through cljw's WebAssembly FFI — no external database, no JVM, no Babashka.

What's inside

• Frontend (src/, ClojureScript + shadow-cljs) — the SPA; the optimized release bundle is committed at resources/public/js/main.js.
• Backend (server/, ClojureWasm) — bookshelf.server serves the SPA + API; bookshelf.db talks to SQLite via (wasm/run "wasm/sqlite3.wasm" …); bookshelf.cover computes cover colours via a Rust Wasm module; bookshelf.auth verifies Google ID tokens.
• Wasm modules (wasm/) — SQLite (vendored amalgamation + a first-party wrapper) and a hand-written Rust cover-colour module. Origins in PROVENANCE.md.
• Storage — data/books.db, created + seeded on first run; persisted on fly.io by a volume.

Run it

cp .envrc.example .envrc      # fill in GOOGLE_CLIENT_ID, then `direnv allow`
./run_local.sh                # builds cljw from source on first run, serves http://localhost:8090

Config (incl. the GOOGLE_CLIENT_ID secret) comes from the environment — locally via direnv, on fly.io via fly secrets set. Deploy details (volume, secrets, repo-select deploy) are in DEPLOY.md. The repo is self-contained: only cljw is built from source (Zig); the SPA and Wasm modules are committed.

License

See the ClojureWasm project for runtime licensing. Demo sources here are provided as-is for illustration.