Concurrently

Run multiple processes concurrently, with support for cargo.

Written in Rust with ☕

Install with Cargo

$ cargo install concurrently

Getting Started

Create a tasks.toml file in the root of your project:

[tasks.client]
workspace = true  # Run the client cargo workspace member
retries = 3       # Retry 3 times before exiting
delay = "1s"      # Wait 1 second before running

[tasks.server]
workspace = true  # Run the server cargo workspace member
release = true    # Run in --release mode

[tasks.db]
command = [
  "docker",
  "run",
  "postgres",
]

Now you can simply run concurrently:

$ cargo concurrently

Config

Common

These configs are optional, and can be used with all tasks.

Config	Type
prepare	String	Runs a command before starting the task.
delay	String	Waits before starting the task. This can be in the format of "1s", "100ms", etc.
retries	Number	Retries this task before exiting all other tasks.

Shell Task

Shell task runs a shell command.

Config	Type
command	String or Array	Runs the command as the task.

Cargo Task

Cargo tasks are built using cargo with cargo build -p <name> where name is the name of the task.

cargo must be set to true for a task to be a cargo task.

Config	Type
cargo	Bool	If set to true, treats this task as a cargo crate. The crate will be built on startup.
release	Bool	Builds for release.
features	[String]	Array of feature flags.