Merge pull request #1177 from artemcm/VerboseDepScan

[Dependency Scanning] Print dependency scanning invocation if '-v' is specified

Author: artemcm

Sources/SwiftDriver/ExplicitModuleBuilds/ModuleDependencyScanning.swift

@@ -152,6 +152,13 @@ public extension Driver {
     let scannerJob = try dependencyScanningJob()
     let forceResponseFiles = parsedOptions.hasArgument(.driverForceResponseFiles)
     let dependencyGraph: InterModuleDependencyGraph
+    
+    if parsedOptions.contains(.v) {
+      let arguments: [String] = try executor.resolver.resolveArgumentList(for: scannerJob,
+                                                                          useResponseFiles: .disabled)
+      stdoutStream <<< arguments.map { $0.spm_shellEscaped() }.joined(separator: " ") <<< "\n"
+      stdoutStream.flush()
+    }
 
     let isSwiftScanLibAvailable = !(try initSwiftScanLib())
     if isSwiftScanLibAvailable {