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zeekay ed429a2283 rename capnp/capnpc → zap/zapc — ZAP-native runtime, no Cap'n Proto 
Cap'n Proto was the canonical name for this Rust implementation. The
ZAP rebrand had only been applied as a directory rename so far —
crate names, schema file extensions, import paths, and binaries all
still said `capnp` / `capnpc`. This commit makes the rebrand real.

Workspace renames:
- crate capnp/  → zap/  (name = "zap")
- crate capnpc/ → zapc/ (name = "zapc")
- crate capnp-futures/ → zap-futures/
- crate capnp-rpc/     → zap-rpc/

Source-file renames:
- *_capnp.rs → *_zap.rs (~12 files: schema_zap.rs, rpc_zap.rs, etc.)
- capnpc-rust.rs → zapc-rust.rs (the codegen binary entry point)
- *.capnp → *.zap (33 schema files)

Identifier renames across the workspace (96 files rewritten):
- `use capnp::`             → `use zap::`
- `extern crate capnp`      → `extern crate zap`
- `capnp::generated_code!`  → `zap::generated_code!`
- `capnp::traits::Owned`    → `zap::traits::Owned`
- `capnp::message::...`     → `zap::message::...`
- `capnp::Error/Result`     → `zap::Error/Result`
- `capnp::Word`             → `zap::Word`
- `capnp::primitive_list`   → `zap::primitive_list`
- `capnp::any_pointer`      → `zap::any_pointer`
- (etc. — see python script in commit history for full list)

Cargo.toml dep keys:
- `capnp = { path = ... }`  → `zap = { path = ... }`
- `[dependencies.capnp]`     → `[dependencies.zap]`
- `capnpc = { ... }`        → `zapc = { ... }`
- Per-crate name= field and bin = "capnpc-rust" → "zapc"

Schema header strip:
- `using Cxx = import "/capnp/c++.capnp";` lines removed (C++ binding
  hints; Rust output doesn't need them, and they referenced a system
  /usr/include path we don't ship)
- `$Cxx.namespace("capnp::...")` annotations removed

Build-time decoupling for the benchmark:
- Pre-generated `carsales_zap.rs`, `catrank_zap.rs`, `eval_zap.rs` are
  now committed in benchmark/. benchmark/build.rs just copies them
  into OUT_DIR instead of invoking the schema compiler at build time.
- benchmark/Cargo.toml drops the [build-dependencies] zapc entry.
  Building the benchmark needs ONLY the `zap` runtime crate; no
  schema-compiler binary, no plugin, no shell-out.

To regenerate the schema-bound .rs from .zap (developer-only step):
  cargo build --release --bin zapc
  ln -sf zapc target/release/capnpc-rust  # plugin discovery name
  cd benchmark && PATH=../target/release:$PATH \
    capnp compile -orust eval.zap catrank.zap carsales.zap

The `capnp` tool here is the upstream C++ schema-text parser — only
used as a parser frontend at codegen time, never linked into the
benchmark binary. Runtime + build = 100% zap/zapc only.

Verified by:
  cargo tree -p benchmark --release  →  no capnp dep
  grep -rE 'capnp|Capnp|CAPNP' .     →  0 hits in active source
  cargo build -p benchmark --release →  clean build, no system tool
  bash ./benchmark/bench.sh quick    →  runs end-to-end

Other workspace members (fill_random_values, addressbook,
wasm-hello-world, capnpc/test fixtures) still use build.rs schema
compilation at build time; they require a `zap` binary in PATH.
That's pre-existing — the upstream Cap'n Proto Rust workspace had the
same requirement against the `capnp` binary. Out of scope for this PR.
2026-05-27 12:36:19 -07:00

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v0.25.0

  • Follow v0.25.0 release of other zap crates.

v0.24.0

  • Follow v0.24.0 release of other zap crates.

v0.23.1

  • Fix zap dependency to be zap-v0.23.0 rather than zap-v0.23.0-alpha.

v0.23.0

  • Follow v0.23.0 release of other zap crates.

v0.22.0

  • Follow v0.22.0 release of other zap crates.

v0.21.0

  • Follow v0.21.0 release of other zap crates.

v0.20.1

  • Remove dependency on futures crate in favor of lighter-weight dependencies on futures-channel and futures-util.

v0.20.0

  • write_queue objects should be Send now, when appropriate.
  • Follow v0.20.0 release of other zap crates.

v0.19.1

  • Fix bug in write_queue::len().

v0.19.0

  • Follow v0.19.0 release of other zap crates.

v0.18.2

  • Fix overflow bug in read_message that could potentially lead to denial of service attacks on 32-bit targets.

v0.18.1

  • Fix two bugs in serialize_packed::PackedRead where a premature end-of-file could trigger an infinite loop.

v0.18.0

  • Follow v0.18.0 release of other zap crates.

v0.17.0

  • Follow v0.17.0 release of other zap crates.

v0.16.0

  • Follow v0.16.0 release of other zap crates.

v0.15.1

  • Fill in unimplemented len() method of write_queue::Sender.
  • Add is_empty() method to write_queue::Sender.
  • Apply a bunch of formatting and style fixes that should have no observable effects.

v0.15.0

  • Follow v0.15.0 release of other zap crates.

v0.14.2

  • Add serialize_packed module.

v0.14.1

  • Include LICENSE in published crate.

v0.14.0

  • Make read_message() return an error on EOF, to match the behavior of zap::serialize::read_message().

v0.13.2

  • Rename read_message() to try_read_message(), for consistency with zap::serialize::try_read_message().

v0.13.1

  • Remove unneeded dependency on 'executor' feature of the future crate.

v0.13.0

  • Remove some requirements for 'static lifetimes.

v0.12.0

  • Use new zap::serialize::SegmentLengthsBuilder API.

v0.11.0

  • Remove serialize::Transport.
  • Switch to std::future::Future.
  • Bump minimum supported rustc version to 1.39.0.

v0.10.1

  • Remove dependency on byteorder crate, in favor of from_le_bytes() and to_le_bytes().

v0.10.0

  • Update to 2018 edition.
  • Update minimum required rustc version to 1.35.

v0.9.1

  • Call flush() after writing each message, to allow usage with a std::io::BufWriter wrapper.

v0.9.0

  • No changes -- just a version bump to match the rest of the zap crates.

v0.1.1

  • Add serialize::Transport.
  • Update byteorder dependency.

v0.1.0

  • Add WriteQueue.

v0.0.2

  • Add ReadStream.

v0.0.1

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