75 lines
1.9 KiB
Swift
75 lines
1.9 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 env: @Sendable () throws -> EnvVars {
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get { self[EnvClient.self].env }
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set { self[EnvClient.self].env = newValue }
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}
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}
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@DependencyClient
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struct EnvClient: Sendable {
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public var env: @Sendable () throws -> EnvVars
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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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public init(
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pandocPath: String = "/bin/pandoc",
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pdfEngine: String = "weasyprint"
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) {
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self.pandocPath = pandocPath
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self.pdfEngine = pdfEngine
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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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}
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}
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extension EnvClient: DependencyKey {
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static let testValue = Self()
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static let liveValue = Self(env: {
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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(ProcessInfo.processInfo.environment, 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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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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