Unresolved imports in workspace member

help
1

Hi, folks!

I have created a few Rust projects, but this is the first time I've tried to use a workspace, and I'm having a problem with dependencies. I'm sure I must be missing something really basic ...

The directory structure of my project looks like this:

.
├── Cargo.lock
├── Cargo.toml
├── LICENSE
├── ocap/
│   ├── Cargo.toml
│   └── src/
│       └── main.rs
├── omega-store/
│   ├── Cargo.toml
│   └── src/
│       ├── card.rs
│       ├── database.rs
│       ├── lib.rs
│       ├── metadata.rs
│       ├── sql_queries.rs
│       └── util.rs
└── otm/
    ├── Cargo.toml
    └── src/
        └── main.rs

ocap and otm are binary crates, which don't yet contain any significant code. omega-store is a library crate, and is what I'm currently working on.

[ROOT]/Cargo.toml:

[workspace]
members = ["ocap", "otm", "omega-store"]
default-members = ["ocap", "otm", "omega-store"]
resolver = "3"

[workspace.package]
version = "0.1.0"
edition = "2024"
authors = ["Caelia R. Chapin <some@email.address>"]
license = "GPL-3.0"

[workspace.dependencies]
chrono = "0.4"
anyhow = "1.0"
configura = "1.1"

omega-store/Cargo.toml:

[package]
name = "omega-store"
version.workspace = true
authors.workspace = true
license.workspace = true

[dependencies]
rusqlite = "0.38"
blake3 = "1.8"
chrono.workspace = true
anyhow.workspace = true

But when I run cargo check, with or without the --workspace flag, in either the project root or the omega-store directory, I get a number of errors like:

error[E0432]: unresolved import `blake3`
 --> omega-store/src/util.rs:5:5
  |
5 | use blake3::hash as b3hash;
  |     ^^^^^^ use of unresolved module or unlinked crate `blake3`

It appears that cargo is failing to find all of my external dependencies. What am I doing wrong?

2

Your package does not specify (or inherit) any edition. Therefore, it defaults to the 2015 edition, which has very different rules for imports and paths, resulting in the errors you see.

3

Oh, wow. Yes. Thank you!