4 files changed, 46 insertions, 12 deletions

diff --git a/Help/release/dev/cpackifw-package-file-extension.rst b/Help/release/dev/cpackifw-package-file-extension.rst
new file mode 100644
index 0000000..e264081
--- /dev/null
+++ b/Help/release/dev/cpackifw-package-file-extension.rst
@@ -0,0 +1,6 @@
+cpackifw-package-file-extension
+-------------------------------
+
+* The :module:`CPackIFW` module gained new
+  :variable:`CPACK_IFW_PACKAGE_FILE_EXTENSION` variable to customize
+  target binary format.
diff --git a/Modules/CPackIFW.cmake b/Modules/CPackIFW.cmake
index c1cb52f..0210410 100644
--- a/Modules/CPackIFW.cmake
+++ b/Modules/CPackIFW.cmake
@@ -221,6 +221,19 @@
 #  You can use :command:`cpack_ifw_add_package_resources` command to resolve
 #  relative paths.
 #
+# .. variable:: CPACK_IFW_PACKAGE_FILE_EXTENSION
+#
+#  The target binary extension.
+#
+#  On Linux, the name of the target binary is automatically extended with
+#  '.run', if you do not specify the extension.
+#
+#  On Windows, the target is created as an application with the extension
+#  '.exe', which is automatically added, if not supplied.
+#
+#  On Mac, the target is created as an DMG disk image with the extension
+#  '.dmg', which is automatically added, if not supplied.
+#
 # .. variable:: CPACK_IFW_REPOSITORIES_ALL
 #
 #  The list of remote repositories.
diff --git a/Source/CPack/IFW/cmCPackIFWGenerator.cxx b/Source/CPack/IFW/cmCPackIFWGenerator.cxx
index 226ea0a..6861623 100644
--- a/Source/CPack/IFW/cmCPackIFWGenerator.cxx
+++ b/Source/CPack/IFW/cmCPackIFWGenerator.cxx
@@ -164,6 +164,7 @@ int cmCPackIFWGenerator::PackageFiles()
       ifwCmd += " " + this->packageFileNames[0];
     } else {
       ifwCmd += " installer";
+      ifwCmd += this->OutputExtension;
     }
     cmCPackIFWLogger(VERBOSE, "Execute: " << ifwCmd << std::endl);
     std::string output;
@@ -205,7 +206,7 @@ const char* cmCPackIFWGenerator::GetPackagingInstallPrefix()
 
 const char* cmCPackIFWGenerator::GetOutputExtension()
 {
-  return this->ExecutableSuffix.c_str();
+  return this->OutputExtension.c_str();
 }
 
 int cmCPackIFWGenerator::InitializeInternal()
@@ -305,16 +306,29 @@ int cmCPackIFWGenerator::InitializeInternal()
   }
 
   // Executable suffix
-  if (const char* optExeSuffix = this->GetOption("CMAKE_EXECUTABLE_SUFFIX")) {
-    this->ExecutableSuffix = optExeSuffix;
-    if (this->ExecutableSuffix.empty()) {
-      std::string sysName(this->GetOption("CMAKE_SYSTEM_NAME"));
-      if (sysName == "Linux") {
-        this->ExecutableSuffix = ".run";
-      }
-    }
+  std::string exeSuffix(this->GetOption("CMAKE_EXECUTABLE_SUFFIX"));
+  std::string sysName(this->GetOption("CMAKE_SYSTEM_NAME"));
+  if (sysName == "Linux") {
+    this->ExecutableSuffix = ".run";
+  } else if (sysName == "Windows") {
+    this->ExecutableSuffix = ".exe";
+  } else if (sysName == "Darwin") {
+    this->ExecutableSuffix = ".app";
+  } else {
+    this->ExecutableSuffix = exeSuffix;
+  }
+
+  // Output extension
+  if (const char* optOutExt =
+        this->GetOption("CPACK_IFW_PACKAGE_FILE_EXTENSION")) {
+    this->OutputExtension = optOutExt;
+  } else if (sysName == "Darwin") {
+    this->OutputExtension = ".dmg";
   } else {
-    this->ExecutableSuffix = this->cmCPackGenerator::GetOutputExtension();
+    this->OutputExtension = this->ExecutableSuffix;
+  }
+  if (this->OutputExtension.empty()) {
+    this->OutputExtension = this->cmCPackGenerator::GetOutputExtension();
   }
 
   return this->Superclass::InitializeInternal();
diff --git a/Source/CPack/IFW/cmCPackIFWGenerator.h b/Source/CPack/IFW/cmCPackIFWGenerator.h
index 8348cee..9d635f8 100644
--- a/Source/CPack/IFW/cmCPackIFWGenerator.h
+++ b/Source/CPack/IFW/cmCPackIFWGenerator.h
@@ -61,8 +61,8 @@ protected:
   const char* GetPackagingInstallPrefix() CM_OVERRIDE;
 
   /**
-   * @brief Extension of binary installer
-   * @return Executable suffix or value from default implementation
+   * @brief Target binary extension
+   * @return Executable suffix or disk image format
    */
   const char* GetOutputExtension() CM_OVERRIDE;
 
@@ -143,6 +143,7 @@ private:
   std::string BinCreator;
   std::string FrameworkVersion;
   std::string ExecutableSuffix;
+  std::string OutputExtension;
 
   bool OnlineOnly;
   bool ResolveDuplicateNames;