feat(examples): in-library chronos CBOR IPC server + cross-platform CI#68
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Adds a standalone IPC example: the library serving itself over a CBOR socket. examples/timer/ipc_chronos/serve.nim compiles into libmy_timer only under -d:ffiIpcServe (every other build untouched) and runs a chronos socket server that, per request, decodes CBOR at the socket edge and calls the library's own async procs directly — native, in-process, zero serialization between the socket and the logic, no FFI boundary, no callback bridge. Exposed as my_timer_serve(address). CBOR (not the native struct ABI) is correct at the wire here: a relay's data is serialized regardless, so native would only relocate the decode and add marshalling for no gain — native locally, CBOR for IPC. serve_host.nim starts it; client.nim is a lib-free chronos client. Both use chronos sockets, so the example builds and runs on Linux, macOS and Windows over TCP (unix sockets are a POSIX bonus). CI: tests/e2e/ipc/run_roundtrip.nim builds the dylib + host + client, spawns the server and round-trips over loopback TCP asserting the replies; wired as `nimble test_ipc` and a 3-OS CI matrix (ubuntu/macos/windows). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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What
A standalone IPC example: the library serving itself over a CBOR socket, plus the automated cross-platform validation it needs. Self-contained on
master(no dependency on the native-ABI stack) inexamples/timer/ipc_chronos/.serve.nimcompiles intolibmy_timeronly under-d:ffiIpcServe(every other build untouched) and runs a chronos socket server that, per request, decodes CBOR at the socket edge and calls the library's own async procs directly — native, in-process, zero serialization between the socket and the logic. No FFI boundary, no callback bridge: the server is the library. Exposed asmy_timer_serve(address).Why CBOR at the wire (not the native struct ABI): a relay's data is serialized regardless, so native would only relocate the decode and add marshalling for no gain — native locally, CBOR for IPC.
Portable
serve_host.nimstarts it;client.nimis a lib-free chronos client. Both use chronos sockets, so the example builds and runs on Linux, macOS and Windows over TCP (unix sockets are a POSIX bonus).CI
tests/e2e/ipc/run_roundtrip.nimbuilds the dylib + host + client, spawns the server and round-trips over loopback TCP asserting the replies — wired asnimble test_ipcand a 3-OS CI matrix (ubuntu/macos/windows). Closes the gap where the IPC story had no automated validation.Validated locally on macOS; the matrix exercises Linux/Windows.
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