initial release

Package.swift

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+// swift-tools-version: 5.7
+import PackageDescription
+
+let package = Package(
+    name: "DoNotDisturbPlugin",
+    platforms: [.macOS(.v12)],
+    products: [
+        .plugin(name: "DoNilDisturbPlugin", targets: ["DoNilDisturb"])
+    ],
+    targets: [
+        // Your app or library
+        .executableTarget(
+            name: "MyApp",
+            plugins: [
+                .plugin(name: "DoNilDisturb")
+            ]
+        ),
+        // Your plugin's IMPLEMENTATION
+        .executableTarget(
+            name: "PluginBinary",
+            path: "PluginBinary"
+        ),
+        // Your plugin's INTERFACE
+        .plugin(
+            name: "DoNilDisturb",
+            capability: .buildTool(),
+            dependencies: [
+                .target(name: "PluginBinary")
+            ]
+        )
+    ]
+)

PluginBinary/PluginBinary.swift

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+import Foundation
+
+extension String: Error { }
+
+@main class PluginBinary {
+    static func main() throws {
+        let outputURL = URL(fileURLWithPath: ProcessInfo.processInfo.arguments[1])
+        let content: String
+
+        if (9.0...18.0 ~= Date().time) { // Your 9-6 basically
+            // Working hours
+            content = "// All is good, do not disturb is off."
+        } else {
+            // DND
+            content = #"#error("Do not disturb is ON")"#
+        }
+
+        try content.write(to: outputURL, atomically: true, encoding: .utf8)
+    }
+}
+
+// https://stackoverflow.com/a/62616907/208205
+// https://creativecommons.org/licenses/by-sa/4.0/
+extension Date {
+    /// time returns a double for which the integer represents the hours from 1 to 24 and the decimal value represents the minutes.
+    var time: Double {
+        Double(Calendar.current.component(.hour, from: self)) + Double(Calendar.current.component(.minute, from: self)) / 100
+    }
+}

Plugins/DoNilDisturb/DoNotDisturbPlugin.swift

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+import Foundation
+import PackagePlugin
+
+@main
+struct DoNilDisturb: BuildToolPlugin {
+
+    func createBuildCommands(context: PackagePlugin.PluginContext, target: PackagePlugin.Target) async throws -> [PackagePlugin.Command] {
+        let output = context.pluginWorkDirectory.appending(["DND.swift"])
+
+        return [
+            .buildCommand(
+                displayName: "Do Not Disturb",
+                executable: try context.tool(named: "PluginBinary").path,
+                arguments: [output.string],
+                outputFiles: [output]
+            )
+        ]
+    }
+}

README.md

@@ -1,2 +1,32 @@
-# DoNilDisturbPlugin
-A plugin for your Xcode project that stops you from working outside work hours
+# DoNilDisturb Swift Plugin
+
+Use Xcode 14+ to make use of this amazing and novel Swift plugin in your package.
+
+The plugin stops you from working on your 9-5 project outside of 9-5 hours:
+
+![Project failing to compile with a message that do not disturb is on](etc/dnd.png)
+
+Add this to your dependencies in your Package.swift:
+
+```swift
+.package(url: "https://github.com/icanzilb/DoNilDisturbPlugin.git", from: "0.0.1"),
+```
+
+**And then**, add the plugin in your target definition(still in Package.swift:
+
+```swift
+.target(
+  name: "MyTarget",
+  plugins: [
+    .plugin(name: "DoNilDisturbPlugin")
+  ]
+)
+```
+
+That's all. Your target will fail to build outside of working hours.
+
+Enjoy your time off work.
+
+## License
+
+MIT, of course.

Sources/MyApp/MyApp.swift

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+import Foundation
+
+@main
+class MyApp {
+    static func main() throws {
+        print("My App runs!")
+        print("But it only builds during workng hours")
+    }
+}

Tests/DoNotDisturbPluginTests/DoNotDisturbPluginTests.swift

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+import XCTest
+@testable import DoNotDisturbPlugin
+
+final class DoNotDisturbPluginTests: XCTestCase {
+    func testExample() throws {
+    }
+}