Anchor feature flag for dependencies is enabled by default?

Question

I'm trying to integrate Raydium into my program. They have different config for devnet and production address based on a feature flag as below:

#[cfg(feature = "devnet")]
declare_id!("CPMDWBwJDtYax9qW7AyRuVC19Cc4L4Vcy4n2BHAbHkCW");
#[cfg(not(feature = "devnet"))]
declare_id!("CPMMoo8L3F4NbTegBCKVNunggL7H1ZpdTHKxQB5qKP1C");

Now I add the Raydium program as a dependency in my own program:

raydium-cp-swap = { git = "https://github.com/raydium-io/raydium-cp-swap", features = [
    "cpi",
    "devnet",
] }

AFAIK, the devnet feature will only be enabled if I manually specify it in the build command, e.g anchor build -- --features "devnet", but in reality it's always enabled, whether I specify the flag or not. The only way for it to not be enabled is to remove the "devnet" flag in the dependency, which is very inconvenient. When I try to print the address, in VSCode it shows the devnet is enabled too:

Does anyone here have a solution to this? basically I want the "devnet" flag to only be enabled if I explicitly specify it in the build command. I want to use the program with both devnet/without devnet configurations.

Answer 1

You're declaring the Raydium dependency with the devnet feature enabled, which means that it will always be built with the devnet feature.

What you really want is to add a devnet feature in your crate, and conditionally enable the devnet feature in the Raydium dependency if it's enabled in your crate.

Try doing this:

[dependencies]
... all other deps ...
raydium-cp-swap = { git = "https://github.com/raydium-io/raydium-cp-swap", features = ["cpi"] }

[features]
devnet = ["raydium-cp-swap/devnet"]

You can read more about Cargo features at https://doc.rust-lang.org/cargo/reference/features.html