protoc-rust 3.0.0-alpha.1

protoc --rust_out=... available as API. protoc needs to be in $PATH, protoc-gen-run does not.
Documentation
Build #452661 2021-10-24T20:09:24.718291+00:00
# rustc version
rustc 1.58.0-nightly (91b931926 2021-10-23)
# docs.rs version
docsrs 0.6.0 (06dfd05 2021-10-09)

# build log
[INFO] running `Command { std: "docker" "create" "-v" "/home/cratesfyi/workspace/builds/protoc-rust-3.0.0-alpha.1/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/protoc-rust-3.0.0-alpha.1/source:/opt/rustwide/workdir:ro,Z" "-v" "/home/cratesfyi/workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/home/cratesfyi/workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "DOCS_RS=1" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "3221225472" "--cpus" "2" "--user" "1001:1001" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "rustdoc" "--lib" "-Zrustdoc-map" "--all-features" "-Zunstable-options" "--config=doc.extern-map.registries.crates-io=\"https://docs.rs/{pkg_name}/{version}/x86_64-unknown-linux-gnu\"" "-j2" "--" "-Z" "unstable-options" "--emit=invocation-specific" "--resource-suffix" "-20211023-1.58.0-nightly-91b931926" "--static-root-path" "/" "--cap-lints" "warn" "--disable-per-crate-search", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 011c4977ac60929e8b97bc6843a951facbff0ce9426b9d01141a7d4b407bbee0
[INFO] running `Command { std: "docker" "start" "-a" "011c4977ac60929e8b97bc6843a951facbff0ce9426b9d01141a7d4b407bbee0", kill_on_drop: false }`
[INFO] [stderr]  Documenting protoc-rust v3.0.0-alpha.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `Command { std: "docker" "inspect" "011c4977ac60929e8b97bc6843a951facbff0ce9426b9d01141a7d4b407bbee0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "011c4977ac60929e8b97bc6843a951facbff0ce9426b9d01141a7d4b407bbee0", kill_on_drop: false }`
[INFO] [stdout] 011c4977ac60929e8b97bc6843a951facbff0ce9426b9d01141a7d4b407bbee0