Feature: cargo new --workspace could create a new workspace and embed the new crate under crates/

[poliorcetics]

Problem

I often want to create new projects as workspaces directly.

Currently this isn't possible: I either have to use a template, copy paste from an existing workspace or do it manually.

Proposed Solution

Have cargo new my-crate --workspace create a workspace with the crate being under crates/my-crate and the members being crates/*.

--workspace would take an (optional, default crates) argument to customize the path for the members.

It would create empty [workspace.dependencies] (and [workspace.lints] ?) table(s) with doc link, as is currently done for crate creation.

In the [dependencies] section of the created crate, it could show how to use workspace dependencies instead of specifying them separately in all crates.

Notes

I feel this would be a nice addition to promote workspace usage and a common format for them. It would also make using them when starting a new project much easier.

I haven't found an issue for this but I may easily have missed it, feel free to close/mark as duplicate if that was already asked for.

There's probably more design work to do too, I'm typing the issue after encountering the issue but I haven't spent a long time looking for issues that would crop up from this.

[heisen-li]

@rustbot label +A-workspaces +Command-new +S-needs-design -S-trige

It seems there is a similar proposal here：#8365

[poliorcetics]

I searched for "cargo new --workspace" and that issue didn't surface 😭, mine is clearly a duplicate, closing in favor of the existing one