cargo new with workspace: exclude/include

[dumindu]

Problem

Currently when we run cargo new command inside a workspace, it gives following warnings,

warning: compiling this new package may not work due to invalid workspace configuration

current package believes it's in a workspace when it's not:
current:   /path/to/workspace/new_crate/Cargo.toml
workspace: /path/to/workspace/new_crate/Cargo.toml

this may be fixable by adding `new_crate ` to the `workspace.members` array of the manifest located at: /path/to/workspace/Cargo.toml
Alternatively, to keep it out of the workspace, add the package to the `workspace.exclude` array, or add an empty `[workspace]` table to the package's manifest.

Additionally, while running cargo run new_crate it gives following errors(but no issue with cargo run --bin new_crate)

warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
   Compiling api v0.1.0 (/path/to/workspace/new_crate)
    Finished dev [unoptimized + debuginfo] target(s) in 0.18s
     Running `target/debug/api api`

Proposed Solution

1. We can add following commands

• cargo new -we and cargo new -wi
• cargo new --workspace exclude and cargo new --workspace include

2. The scope of the resolver is bit unclear for me. If we add cargo workspace command, we can add more subcommands I think.

Notes

No response

[epage]

This was always meant to be an intermediate state which was addressed in #12779 which will be released in 1.75 next week. We went the opinionated route of always adding to the workspace.

[dumindu]

Duplicate: #6378