Closed
Description
Problem
The environment variables Cargo sets when building crates don't appear to get updated if the crate's Cargo.toml inherits values from the workspace, and the only change between builds is the value in the workspace's Cargo.toml.
Steps
% cat >Cargo.toml <<EOF
[workspace]
members = ["lib"]
package.version = "0.2.0"
package.readme = "beep.md"
EOF
% mkdir -p lib/src
% cat >lib/Cargo.toml <<EOF
[package]
name = "lib"
version = "0.1.0"
edition = "2021"
readme = { workspace = true }
EOF
% cat >lib/src/main.rs <<EOF
fn main() {
println!("Readme: {}", env!("CARGO_PKG_README"));
}
EOF
% cargo run -p lib 2>/dev/null
Readme: ../beep.md
% cat >Cargo.toml <<EOF
[workspace]
members = ["lib"]
package.version = "0.2.0"
package.readme = true
EOF
% # Next command should print ../README.md because the workspace value changed:
% cargo run -p lib 2>/dev/null
Readme: ../beep.md
% # Clearing the cache forces a rebuild, which gives the correct value:
% rm -rf target
% cargo run -p lib 2>/dev/null
Readme: ../README.mdPossible Solution(s)
No response
Notes
No response
Version
cargo 1.79.0 (ffa9cf99a 2024-06-03)
release: 1.79.0
commit-hash: ffa9cf99a594e59032757403d4c780b46dc2c43a
commit-date: 2024-06-03
host: aarch64-apple-darwin
libgit2: 1.7.2 (sys:0.18.3 vendored)
libcurl: 8.1.2 (sys:0.4.72+curl-8.6.0 system ssl:(SecureTransport) LibreSSL/3.3.6)
ssl: OpenSSL 1.1.1w 11 Sep 2023
os: Mac OS 13.5.2 [64-bit]