Add cargo new --workspace to create a workspace

[camelid]

Describe the problem you are trying to solve

One has to manually create a new directory and setup a Cargo.toml, rather than being able to simply run cargo new foo --workspace and have a basic template set-up.

Describe the solution you'd like

Add the option --workspace to cargo new that creates a new workspace with the provided name.

Notes

The feature is not too important, but it seems like it would streamline the process of creating a new workspace a bit.

For general template support, see #5151

For adding workspace members to a workspace, see #6378

[pksunkara]

Just wanted to chime in and say that we have been looking to implement this with pksunkara/cargo-workspaces#15. Once that PR is merged, you should be able to do cargo ws init.

[buzmeg]

Should this also be closed as postponed per #8411 ?

[Stargateur]

@buzmeg why is there another issue that ask about this feature ?

[H2rmone]

Same confusion here. In Javascript community, tools like lerna, yarn workspace and nx both have command to create workspace project. Cargo workspace includes many feature, I think it will save a lot of beginners' time if we have command to create workspace project like cargo new --workspace.

[dobromyslov]

Are there any plans to implement this feature? Looks like the templates feature was postponed last year.

[drebbe-intrepid]

Any update with this? I would love this feature also.

[epage]

I've clarified the title and linked out to #6378 since I always get these mixed up.

As for plans to move forward with this, someone would need to step up and work on a design for this which at least acknowledges the needs of #6378 so one doesn't block the other.

My gut feeling is there are enough use cases with various needs that we'd be better served by research into #5151.

[BartMassey]

I will admit to typing cargo init --workspace in a directory containing a bunch of project directories just now and expecting it to "just work", adding all the project directories as workspace members. It would be great if this is possible, as its current omission violates the principle of least surprise a bit I think.

Ah well, off to handwrite a workspace Cargo.toml.