101 lines
3.0 KiB
Swift
101 lines
3.0 KiB
Swift
import Dependencies
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import DependenciesMacros
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import Foundation
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extension DependencyValues {
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/// Holds values defined in the process environment that are needed.
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///
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/// These are generally loaded from a `.env` file, but also have default values,
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/// if not found.
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public var environment: EnvVars {
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get { self[EnvVars.self] }
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set { self[EnvVars.self] = newValue }
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}
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}
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/// Holds values defined in the process environment that are needed.
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///
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/// These are generally loaded from a `.env` file, but also have default values,
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/// if not found.
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public struct EnvVars: Codable, Equatable, Sendable {
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/// The path to the pandoc executable on the system, used to generate pdf's.
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public let pandocPath: String
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/// The pdf engine to use with pandoc when creating pdf's.
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public let pdfEngine: String
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/// The postgres hostname, used for production database connection.
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public let postgresHostname: String?
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/// The postgres username, used for production database connection.
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public let postgresUsername: String?
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/// The postgres password, used for production database connection.
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public let postgresPassword: String?
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/// The postgres database, used for production database connection.
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public let postgresDatabase: String?
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/// The path to the sqlite database, used for development database connection.
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public let sqlitePath: String?
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public init(
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pandocPath: String = "/usr/bin/pandoc",
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pdfEngine: String = "weasyprint",
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postgresHostname: String? = "localhost",
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postgresUsername: String? = "vapor",
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postgresPassword: String? = "super-secret",
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postgresDatabase: String? = "vapor",
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sqlitePath: String? = "db.sqlite"
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) {
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self.pandocPath = pandocPath
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self.pdfEngine = pdfEngine
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self.postgresHostname = postgresHostname
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self.postgresUsername = postgresUsername
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self.postgresPassword = postgresPassword
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self.postgresDatabase = postgresDatabase
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self.sqlitePath = sqlitePath
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}
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enum CodingKeys: String, CodingKey {
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case pandocPath = "PANDOC_PATH"
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case pdfEngine = "PDF_ENGINE"
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case postgresHostname = "POSTGRES_HOSTNAME"
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case postgresUsername = "POSTGRES_USERNAME"
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case postgresPassword = "POSTGRES_PASSWORD"
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case postgresDatabase = "POSTGRES_DATABASE"
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case sqlitePath = "SQLITE_PATH"
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}
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public static func live(_ env: [String: String] = ProcessInfo.processInfo.environment) -> Self {
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// Convert default values into a dictionary.
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let defaults =
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(try? encoder.encode(EnvVars()))
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.flatMap { try? decoder.decode([String: String].self, from: $0) }
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?? [:]
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// Merge the default values with values found in process environment.
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let assigned = defaults.merging(env, uniquingKeysWith: { $1 })
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return (try? JSONSerialization.data(withJSONObject: assigned))
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.flatMap { try? decoder.decode(EnvVars.self, from: $0) }
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?? .init()
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}
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}
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extension EnvVars: TestDependencyKey {
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public static let testValue = Self()
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}
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private let encoder: JSONEncoder = {
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JSONEncoder()
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}()
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private let decoder: JSONDecoder = {
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JSONDecoder()
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}()
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