Improve on using features of a dependency in plrust function #325
Description
PL/Rust does not handle using features for a dependencies quite well currently.
For instance, I have made serde an allowed dependency with the feature derive
$ > cat plrust_allowed_dependencies.toml
serde = { version = "1.0", features = ["derive"] }
But when i try to define a function with serde as dependency and enable the derive marco, it errors out because it expect the value of a dependency to be a string not a toml table
postgres=# CREATE FUNCTION foo (r INT, g INT, b INT) RETURNS INT AS
$$
CREATE FUNCTION table_deps (r INT, g INT, b INT) RETURNS TEXT STRICT AS
$$
[dependencies]
serde = { version = "1.0", features = ["derive"] }
rand = "*"
[code]
use serde::{Serialize, Deserialize};
#[derive(Debug, Serialize, Deserialize)]
struct Color {
r: u8,
g: u8,
b: u8,
}
let r = r as u8;
let g = g as u8;
let b = b as u8;
Ok(Some(format!("{:?}", Color{ r, g, b})))
$$ language plrust;
$$ language plrust;
ERROR:
0: dependency serde with values Table({"features": Array([String("derive")]), "version": String("1.0")}) is malformatted. Only strings are supported
Location:
plrust/src/user_crate/mod.rs:355
Backtrace omitted. Run with RUST_BACKTRACE=1 environment variable to display it.
Run with RUST_BACKTRACE=full to include source snippets.
postgres=#