Depends on all database crates regardless of features

[stepantubanov]

Bug Description

Installs sqlx-sqlite and sqlx-postgres even when only mysql feature is selected.

Minimal Reproduction

Cargo.toml file:

[package]
name = "example-sqlx"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
sqlx = { version = "0.7", features = ["runtime-tokio-rustls", "mysql"] }

Execute cargo check. Contents of Cargo.lock:

...

[[package]]
name = "libsqlite3-sys"
version = "0.26.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "afc22eff61b133b115c6e8c74e818c628d6d5e7a502afea6f64dee076dd94326"
dependencies = [
 "cc",
 "pkg-config",
 "vcpkg",
]

...

[[package]]
name = "sqlx"
version = "0.7.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8e58421b6bc416714d5115a2ca953718f6c621a51b68e4f4922aea5a4391a721"
dependencies = [
 "sqlx-core",
 "sqlx-macros",
 "sqlx-mysql",
 "sqlx-postgres",
 "sqlx-sqlite",
]

...

Info

• SQLx version: 0.7.1
• SQLx features enabled: ["runtime-tokio-rustls", "mysql"]
• Database server and version: not applicable
• Operating system: macOS
• rustc --version: rustc 1.71.0 (8ede3aae2 2023-07-12)

[kyrias]

Bug Description

Installs sqlx-sqlite and sqlx-postgres even when only mysql feature is selected.

This is incorrect. Cargo builds lockfiles assuming all features are enabled. That does not mean that those dependencies are actually built.

[stepantubanov]

@kyrias
Thanks! Found this issue: rust-lang/cargo#10801