Add Linux Support

Sources/EvolutionMetadataExtraction/CommandLineSupport.swift

@@ -10,6 +10,10 @@
 import Foundation
 import ArgumentParser
 
+#if canImport(FoundationNetworking)
+import FoundationNetworking // Required on Linux
+#endif
+
 nonisolated(unsafe) private var VERBOSE_ENABLED: Bool = false // Set once in `validate(verbose:)`, read once for `verboseEnabled`.
 func verbosePrint(_ items: Any..., additionalCondition: Bool = true, separator: String = " ", terminator: String = "\n\n") {
     if verboseEnabled && additionalCondition { print(items, separator: separator, terminator: terminator) }

Sources/EvolutionMetadataExtraction/Extractors/EvolutionMetadataExtractor.swift

@@ -49,7 +49,7 @@ struct EvolutionMetadataExtractor {
                 implementationVersionSet.insert(version)
             }
         }
-        let implementationVersions =  implementationVersionSet.sorted(using: SortDescriptor(\.self))
+        let implementationVersions =  implementationVersionSet.sorted { $0.compare($1, options: .numeric) == .orderedAscending }
 
         verbosePrint("Implementation Versions:", implementationVersions)
         let formattedExtractionDate = extractionJob.jobMetadata.extractionDate.formatted(.iso8601)

Sources/EvolutionMetadataExtraction/Utilities/FoundationExtensions.swift

@@ -9,6 +9,20 @@
 
 import Foundation
 
+#if canImport(FoundationNetworking)
+import FoundationNetworking // Required for Linux
+#endif
+
+// Declare Core Foundation constants not available on Linux
+#if os(Linux)
+let kCFNetworkProxiesHTTPEnable = "HTTPEnable"
+let kCFNetworkProxiesHTTPProxy = "HTTPProxy"
+let kCFNetworkProxiesHTTPPort = "HTTPPort"
+let kCFNetworkProxiesHTTPSEnable = "HTTPSEnable"
+let kCFNetworkProxiesHTTPSProxy = "HTTPSProxy"
+let kCFNetworkProxiesHTTPSPort = "HTTPSPort"
+#endif // os(Linux)
+
 // Dictionary extension accepts an array of keys to search for.
 // The first key found returns a tuple of the key and its value.
 // Used to find acceptable name variations in headers and environment variables.

Sources/EvolutionMetadataExtraction/Utilities/Networking.swift

@@ -10,6 +10,10 @@
 import Foundation
 import EvolutionMetadataModel
 
+#if canImport(FoundationNetworking)
+import FoundationNetworking // Required for Linux
+#endif
+
 struct PreviousResultsFetcher {
 
     static let previousResultsURL = URL(string: "https://download.swift.org/swift-evolution/v1/evolution.json")!

Sources/EvolutionMetadataExtraction/Utilities/Snapshot.swift

@@ -174,7 +174,12 @@ struct Snapshot {
             guard addedFilenames.isEmpty else { fatalError("Not all files copied: \(addedFilenames)") }
         }
 
+#if os(Linux)
+        try FileManager.default.createDirectory(at: outputURL.deletingLastPathComponent(), withIntermediateDirectories: true)
+        try FileManager.default.moveItem(at: temporarySnapshotDirectory, to: outputURL)
+#else
         try FileManager.default.createDirectory(at: outputURL, withIntermediateDirectories: true)
         _ = try FileManager.default.replaceItemAt(outputURL, withItemAt: temporarySnapshotDirectory, options: [.usingNewMetadataOnly])
+#endif
     }
 }