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Chris LuandGitHub
baead6901c
Every workflow that builds the Rust volume server first installed protoc from a package manager - twelve steps across apt, brew and choco. That is 37s per job on a good day, and this week archive.ubuntu.com stalled long enough for four jobs to burn their whole timeout without reaching a build. protoc-bin-vendored ships the compiler as a build-dependency, so it now arrives through the cargo registry the workflows already cache and there is nothing left to install. cargo build works on a machine with no protoc at all, which is worth as much locally as it is in CI. It also pins the version. The apt protoc on ubuntu-22.04 is 3.12, old enough to reject proto3 optional, which is why build.rs passes --experimental_allow_proto3_optional; the vendored one is 31.1. The flag stays, since it costs nothing and keeps a build against an older PROTOC working, and an explicit PROTOC still overrides the vendored binary for packagers who supply their own.