Program is the only public interface. (#574)

Sources/iTunes/Array+Codable.swift

@@ -8,7 +8,7 @@
 import Foundation
 
 extension Array where Element: Codable {
-  public func jsonData() throws -> Data {
+  func jsonData() throws -> Data {
     let encoder = JSONEncoder()
     encoder.outputFormatting = [.prettyPrinted, .sortedKeys]
     encoder.dateEncodingStrategy = .iso8601

Sources/iTunes/BackupCommand.swift

@@ -65,8 +65,8 @@ enum DestinationContext: EnumerableFlag {
 extension SchemaConstraints: EnumerableFlag {}
 extension Source: EnumerableFlag {}
 
-public struct BackupCommand: AsyncParsableCommand {
-  public static let configuration = CommandConfiguration(
+struct BackupCommand: AsyncParsableCommand {
+  static let configuration = CommandConfiguration(
     commandName: "backup",
     abstract: "Backs up music data.",
     version: iTunesVersion
@@ -122,7 +122,7 @@ public struct BackupCommand: AsyncParsableCommand {
   }
 
   /// Validates the input matrix.
-  public func validate() throws {
+  func validate() throws {
     if destination == .db && outputFile == nil {
       throw ValidationError("--db requires outputDirectory to be set")
     }
@@ -132,13 +132,11 @@ public struct BackupCommand: AsyncParsableCommand {
     }
   }
 
-  public func run() async throws {
+  func run() async throws {
     let tracks = try await source.gather(reduce: reduce)
 
     try await destination.context(outputFile: outputFile).emit(
       tracks, branch: "main", tagPrefix: tagPrefix, version: Self.configuration.version,
       schemaOptions: laxSchema.schemaOptions)
   }
-
-  public init() {}  // This is public and empty to help the compiler.
 }

Sources/iTunes/Batch/BatchCommand.swift

@@ -10,10 +10,10 @@ import Foundation
 
 extension Batch: EnumerableFlag {}
 
-public struct BatchCommand: AsyncParsableCommand {
+struct BatchCommand: AsyncParsableCommand {
   private static let fileName = "itunes.json"
 
-  public static let configuration = CommandConfiguration(
+  static let configuration = CommandConfiguration(
     commandName: "batch",
     abstract: "Create many sql source or databases from a git repository.",
     version: iTunesVersion
@@ -59,13 +59,11 @@ public struct BatchCommand: AsyncParsableCommand {
   )
   var outputDirectory: URL
 
-  public func run() async throws {
+  func run() async throws {
     let configuration = GitTagData.Configuration(
       directory: gitDirectory, tagPrefix: tagPrefix, fileName: Self.fileName)
     try await batch.build(
       configuration, outputDirectory: outputDirectory,
       schemaOptions: laxSchema.schemaOptions)
   }
-
-  public init() {}  // This is public and empty to help the compiler.
 }

Sources/iTunes/Data+Utf8String.swift

@@ -8,7 +8,7 @@
 import Foundation
 
 extension Data {
-  public func asUTF8String() throws -> String {
+  func asUTF8String() throws -> String {
     enum DataUTF8Error: Error {
       case cannotConvertToUTF8String
     }

Sources/iTunes/GitTagData.swift

@@ -75,7 +75,7 @@ struct GitTagData {
     let branch: String?
     let fileName: String
 
-    public init(
+    init(
       directory: URL, tagPrefix: String = "", branch: String? = nil, fileName: String
     ) {
       self.directory = directory
@@ -118,7 +118,7 @@ struct GitTagData {
 
       var index = 0
 
-      mutating public func next() async throws -> TagData? {
+      mutating func next() async throws -> TagData? {
         guard !Task.isCancelled else { return nil }
 
         guard index < tags.count else { return nil }

Sources/iTunes/PackageBuildInfo+Version.swift

@@ -27,4 +27,4 @@ extension PackageBuild {
   }
 }
 
-public let iTunesVersion = PackageBuild.info.version
+let iTunesVersion = PackageBuild.info.version

Sources/iTunes/Patch/PatchCommand.swift

@@ -3,10 +3,10 @@ import Foundation
 
 extension Repairable: EnumerableFlag {}
 
-public struct PatchCommand: AsyncParsableCommand {
+struct PatchCommand: AsyncParsableCommand {
   private static let fileName = "itunes.json"
 
-  public static let configuration = CommandConfiguration(
+  static let configuration = CommandConfiguration(
     commandName: "patch",
     abstract: "Creates patches for itunes.json data.",
     version: iTunesVersion
@@ -36,11 +36,9 @@ public struct PatchCommand: AsyncParsableCommand {
   @Option(help: "The corrections to apply when creating this patch (as a JSON string).")
   var correction: String = ""
 
-  public func run() async throws {
+  func run() async throws {
     let configuration = GitTagData.Configuration(
       directory: gitDirectory, tagPrefix: sourceTagPrefix, fileName: PatchCommand.fileName)
     print(try await repairable.gather(configuration, correction: correction))
   }
-
-  public init() {}  // This is public and empty to help the compiler.
 }

Sources/iTunes/Repair/RepairCommand.swift

@@ -54,10 +54,10 @@ extension Patchable {
   }
 }
 
-public struct RepairCommand: AsyncParsableCommand {
+struct RepairCommand: AsyncParsableCommand {
   private static let fileName = "itunes.json"
 
-  public static let configuration = CommandConfiguration(
+  static let configuration = CommandConfiguration(
     commandName: "repair",
     abstract: "Repairs git repositories with itunes.json using a patch file.",
     version: iTunesVersion
@@ -99,7 +99,7 @@ public struct RepairCommand: AsyncParsableCommand {
   @Option(help: "The destination git branch. Defaults to the patchable type name.")
   var destinationBranch: String?
 
-  public func run() async throws {
+  func run() async throws {
     let patch = try patchable.createPatch(patchURL)
 
     let sourceConfiguration = GitTagData.Configuration(
@@ -116,6 +116,4 @@ public struct RepairCommand: AsyncParsableCommand {
       destinationTagPrefix: destinationTagPrefix,
       destinationConfiguration: destinationConfiguration, version: Self.configuration.version)
   }
-
-  public init() {}  // This is public and empty to help the compiler.
 }