automatically extracts minimum OS version from app bundle

Author: scriptingosx

.swiftpm/xcode/package.xcworkspace/xcuserdata/armin.briegel.xcuserdatad/UserInterfaceState.xcuserstate

@@ -21,12 +21,18 @@ extension Bundle {
     }
     return nil
   }
+
+  /// Returns LSMinimumSystemVersion if present
+  var minimumSystemVersion: String? {
+    object(forInfoDictionaryKey: "LSMinimumSystemVersion") as? String
+  }
 }
 
 struct AppMetadata {
   let name: String
   let identifier: String
   let version: String
+  let minimumSystemVersion: String?
 
   init(from appURL: URL) throws {
     guard let bundle = Bundle(url: appURL) else {
@@ -47,5 +53,7 @@ struct AppMetadata {
       throw QuickPkgError.infoPlistParsingFailed("Missing version information")
     }
     self.version = version
+
+    self.minimumSystemVersion = bundle.minimumSystemVersion
   }
 }

Sources/quickpkg/AppMetadata.swift

@@ -36,6 +36,7 @@ struct PackageBuilder: Sendable {
     scripts: URL?,
     ownership: Ownership?,
     relocatable: Bool,
+    minOSVersion: String?,
     sign: String?,
     keychain: String?,
     cert: String?,
@@ -74,7 +75,12 @@ struct PackageBuilder: Sendable {
     if let ownership = ownership {
       arguments += ["--ownership", ownership.rawValue]
     }
-    
+
+    if let minOSVersion = minOSVersion {
+      arguments += ["--min-os-version", minOSVersion]
+      logger.log("Minimum OS version: \(minOSVersion)", level: 1)
+    }
+
     if let sign = sign {
       arguments += ["--sign", sign]
     }

Sources/quickpkg/PackageBuilder.swift

@@ -185,6 +185,9 @@ struct QuickPkg: AsyncParsableCommand {
     // Extract metadata from app
     let metadata = try AppMetadata(from: payloadAppURL)
     logger.log("Name: \(metadata.name), ID: \(metadata.identifier), Version: \(metadata.version)", level: 1)
+    if let minOS = metadata.minimumSystemVersion {
+      logger.log("Minimum macOS: \(minOS)", level: 1)
+    }
 
     // Prepare scripts if needed
     var scriptsDir: URL?
@@ -260,6 +263,7 @@ struct QuickPkg: AsyncParsableCommand {
       scripts: scriptsDir,
       ownership: ownership,
       relocatable: relocatable,
+      minOSVersion: metadata.minimumSystemVersion,
       sign: sign,
       keychain: keychain,
       cert: cert,