Add support for including Swift packages in the template specification.

Sources/BootstrappKit/Bootstrapp.swift

@@ -12,19 +12,26 @@ public class Bootstrapp {
     public let template: BootstrappTemplate
     public var specification: BootstrappSpecification { template.specification }
     public let parameters: [BootstrappParameter]
+    public let packages: [BootstrappPackage]
     private var blacklistedDirectories: [Path] = []
     private var blacklistedFiles: [Path] = []
 
-    public init(template: BootstrappTemplate, parameters: [BootstrappParameter]) {
+    public init(
+        template: BootstrappTemplate,
+        parameters: [BootstrappParameter],
+        packages: [BootstrappPackage]
+    ) {
         self.template = template
         self.parameters = parameters
+        self.packages = packages
     }
 
     public func instantiateTemplate() throws -> Path {
 
         var context = makeDefaultContext()
         context = applySubstitutions(specification.substitutions, to: context)
         context = applyParameters(parameters, to: context)
+        context = applyPackages(packages, to: context)
 
         let outputPath = try prepareOutputDirectory(accordingTo: specification, with: context)
         let contentPath = template.contentPath
@@ -106,6 +113,15 @@ public class Bootstrapp {
         return context
     }
 
+    private func applyPackages(
+        _ packages: [BootstrappPackage],
+        to inputContext: Context
+    ) -> Context {
+        var context = inputContext
+        context["packages"] = packages
+        return context
+    }
+
     // MARK: - Output Path
 
     private func prepareOutputDirectory(accordingTo specification: BootstrappSpecification,

Sources/BootstrappKit/Model/BootstrappPackage.swift

@@ -0,0 +1,42 @@
+//
+//  Copyright © 2023 Apparata AB. All rights reserved.
+//
+
+import Foundation
+
+public struct BootstrappPackage: Identifiable {
+    public var id: String { name }
+    public let name: String
+    public let url: String
+    public let version: String
+
+    public init(name: String, url: String, version: String) {
+        self.name = name
+        self.url = url
+        self.version = version
+    }
+}
+
+extension BootstrappPackage: Codable {
+
+    enum CodingKeys: String, CodingKey {
+        case id
+        case name
+        case url
+        case version
+    }
+
+    public init(from decoder: Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        name = try container.decode(String.self, forKey: .name)
+        url = try container.decode(String.self, forKey: .url)
+        version = try container.decode(String.self, forKey: .version)
+    }
+
+    public func encode(to encoder: Encoder) throws {
+        var container = encoder.container(keyedBy: CodingKeys.self)
+        try container.encode(name, forKey: .name)
+        try container.encode(url, forKey: .url)
+        try container.encode(version, forKey: .version)
+    }
+}

Sources/BootstrappKit/Model/BootstrappSpecification.swift

@@ -187,6 +187,7 @@ public struct BootstrappSpecification {
     public let parametrizableFiles: [Regex]
     public let includeDirectories: [IncludeDirectories]
     public let includeFiles: [IncludeFiles]
+    public let packages: [BootstrappPackage]
 }
 
 extension BootstrappSpecification.ProjectType: Hashable {
@@ -240,6 +241,7 @@ extension BootstrappSpecification: Codable {
         case parametrizableFiles
         case includeDirectories
         case includeFiles
+        case packages
     }
 
     public init(from decoder: Decoder) throws {
@@ -280,6 +282,7 @@ extension BootstrappSpecification: Codable {
         parametrizableFiles = patterns.map { Regex("^\($0)$") }
         includeDirectories = try container.decodeIfPresent([IncludeDirectories].self, forKey: .includeDirectories) ?? []
         includeFiles = try container.decodeIfPresent([IncludeFiles].self, forKey: .includeFiles) ?? []
+        packages = try container.decodeIfPresent([BootstrappPackage].self, forKey: .packages) ?? []
     }
 
     public func encode(to encoder: Encoder) throws {
@@ -314,6 +317,7 @@ extension BootstrappSpecification: Codable {
         try container.encode(patterns, forKey: .parametrizableFiles)
         try container.encode(includeDirectories, forKey: .includeDirectories)
         try container.encode(includeFiles, forKey: .includeFiles)
+        try container.encode(packages, forKey: .packages)
     }
 }