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Cargo Remote

Use with caution, I didn't test this software well and it is a really hacky (at least for now). If you want to test it please create a VM or at least a separate user on your build host

Why I built it

One big annoyance when working on rust projects on my notebook are the compile times. Since I'm using rust nightly for some of my projects I have to recompile rather often. Currently there seem to be no good remote-build integrations for rust, so I decided to build one my own.

Planned capabilities

This first version is very simple (could have been a bash script), but I intend to enhance it to a point where it detects compatibility between local and remote versions, allows (nearly) all cargo commands and maybe even load distribution over multiple machines.

Usage

For now only cargo remote [FLAGS] [OPTIONS] <command> works: it copies the current project to a temporary directory (~/remote-builds/<project_name>) on the remote server, calls cargo <command> remotely and optionally (-c) copies back the resulting target folder. This assumes that server and client are running the same rust version and have the same processor architecture. On the client ssh and rsync need to be installed.

If you want to pass remote flags you have to end the options/flags section using --. E.g. to build in release mode and copy back the result use:

cargo remote -c -- build --release

Configuration

You can place a config file called .cargo-remote.toml in the same directory as your Cargo.toml or at ~/.config/cargo-remote/cargo-remote.toml. There you can define a default remote build host and user. It can be overridden by the -r flag.

Example config file:

remote = "builds@myserver"

Flags and options

USAGE:
    cargo remote [FLAGS] [OPTIONS] <command> [remote options]...

FLAGS:
    -c, --copy-back          Transfer the target folder back to the local machine
        --help               Prints help information
    -h, --transfer-hidden    Transfer hidden files and directories to the build server
    -V, --version            Prints version information

OPTIONS:
    -b, --build-env <build_env>              Set remote environment variables. RUST_BACKTRACE, CC, LIB, etc.  [default:
                                             RUST_BACKTRACE=1]
    -e, --env <env>                          Environment profile. default_value = /etc/profile [default: /etc/profile]
        --manifest-path <manifest_path>      Path to the manifest to execute [default: Cargo.toml]
    -r, --remote <remote>                    Remote ssh build server
    -d, --rustup-default <rustup_default>    Rustup default (stable|beta|nightly) [default: stable]

ARGS:
    <command>              cargo command that will be executed remotely
    <remote options>...    cargo options and flags that will be applied remotely

How to install

git clone https://github.com/paritytech/cargo-remote
cargo install --path cargo-remote/ -f

MacOS Problems

It was reported that the rsync version shipped with MacOS doesn't support the progress flag and thus fails when cargo-remote tries to use it. You can install a newer version by running

brew install rsync

See also #10.

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