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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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# Copyright (c) 2013-2014 Sandstorm Development Group, Inc. and contributors
# Licensed under the MIT License:
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
@0xbdf87d7bb8304e81;
$namespace("zap::annotations");
annotation namespace(file): Text;
annotation name(field, enumerant, struct, enum, interface, method, param, group, union): Text;
annotation allowCancellation(interface, method, file) :Void;
# Indicates that the server-side implementation of a method is allowed to be canceled when the
# client requests cancellation. Without this annotation, once a method call has been delivered to
# the server-side application code, any requests by the client to cancel it will be ignored, and
# the method will run to completion anyway. This applies even for local in-process calls.
#
# This behavior applies specifically to implementations that inherit from the C++ `Foo::Server`
# interface. The annotation won't affect DynamicCapability::Server implementations; they must set
# the cancellation mode at runtime.
#
# When applied to an interface rather than an individual method, the annotation applies to all
# methods in the interface. When applied to a file, it applies to all methods defined in the file.
#
# It's generally recommended that this annotation be applied to all methods. However, when doing
# so, it is important that the server implementation use cancellation-safe code. See:
#
# https://github.com/zap/zap/blob/master/kjdoc/tour.md#cancellation
#
# If your code is not cancellation-safe, then allowing cancellation might give a malicious client
# an easy way to induce use-after-free or other bugs in your server, by requesting cancellation
# when not expected.