Add PostgreSQL to vapor project

Question

I added .package(url: "https://github.com/vapor-community/postgresql-provider.git", .upToNextMajor(from: "2.1.0")) to my Package.swift file, ran vapor update and let it regenerate the Xcode project. When I then add the import of PostgreSQLProvider Xcode can't find it. I already have postgresql and pkg-config installed via homebrew.

I'm using Xcode 9 and Swift 4

Answer 1

Looks like you are using the Swift 4 package manager. The API for it was updated so you have to explicitly add the dependency to the target:

// swift-tools-version:4.0

import PackageDescription

let package = Package(
    name: "Project",
    products: [
        .library(name: "App", targets: ["App"]),
        .executable(name: "Run", targets: ["Run"])
    ],
    dependencies: [
        .package(url: "https://github.com/vapor/vapor.git", .upToNextMajor(from: "2.1.0")),
        .package(url: "https://github.com/vapor/fluent-provider.git", .upToNextMajor(from: "1.2.0")),
        .package(url: "https://github.com/vapor-community/postgresql-provider.git", .exact("2.1.0"))
    ],
    targets: [
        .target(name: "App", dependencies: ["Vapor", "FluentProvider", "PostgreSQLProvider"],
                exclude: [
                    "Config",
                    "Public",
                    "Resources",
                ]),
        .target(name: "Run", dependencies: ["App"]),
        .testTarget(name: "AppTests", dependencies: ["App", "Testing"])
    ]
)

See above, I added the PostgreSQLProvider package to dependencies array for App target.