refactor: address code review comments from #1366 (#1390)

See: https://github.com/resin-io/etcher/pull/1366
Signed-off-by: Juan Cruz Viotti <jviotti@openmailbox.org>

Makefile

@@ -156,6 +156,7 @@ TARGET_ARCH_DEBIAN = $(shell ./scripts/build/architecture-convert.sh -r $(TARGET
 PRODUCT_NAME = etcher
 APPLICATION_NAME_LOWERCASE = $(shell echo $(APPLICATION_NAME) | tr A-Z a-z)
 APPLICATION_VERSION_DEBIAN = $(shell echo $(APPLICATION_VERSION) | tr "-" "~")
+CPRF = cp -RLf
 
 # ---------------------------------------------------------------------
 # Rules
@@ -180,26 +181,22 @@ $(BUILD_OUTPUT_DIRECTORY): | $(BUILD_DIRECTORY)
 $(BUILD_DIRECTORY)/electron-$(TARGET_PLATFORM)-$(TARGET_ARCH)-dependencies: package.json npm-shrinkwrap.json \
 	| $(BUILD_DIRECTORY)
 	mkdir $@
-	cp -rf src $@
 	./scripts/build/dependencies-npm.sh -p \
 		-r "$(TARGET_ARCH)" \
 		-v "$(ELECTRON_VERSION)" \
 		-x $@ \
 		-t electron \
 		-s "$(TARGET_PLATFORM)"
-	rm -rf $@/src
 
 $(BUILD_DIRECTORY)/node-$(TARGET_PLATFORM)-$(TARGET_ARCH)-dependencies: package.json npm-shrinkwrap.json \
 	| $(BUILD_DIRECTORY)
 	mkdir $@
-	cp -rf src $@
 	./scripts/build/dependencies-npm.sh -p -f \
 		-r "$(TARGET_ARCH)" \
 		-v "$(NODE_VERSION)" \
 		-x $@ \
 		-t node \
 		-s "$(TARGET_PLATFORM)"
-	rm -rf $@/src
 
 $(BUILD_DIRECTORY)/electron-$(TARGET_PLATFORM)-$(APPLICATION_VERSION)-$(TARGET_ARCH)-app: \
 	$(BUILD_DIRECTORY)/electron-$(TARGET_PLATFORM)-$(TARGET_ARCH)-dependencies \
@@ -207,7 +204,7 @@ $(BUILD_DIRECTORY)/electron-$(TARGET_PLATFORM)-$(APPLICATION_VERSION)-$(TARGET_A
 	./scripts/build/electron-create-resources-app.sh -s . -o $@ \
 		-v $(APPLICATION_VERSION) \
 		-f "$(APPLICATION_FILES)"
-	cp -RLf $</* $@
+	$(CPRF) $</* $@
 
 ifdef ANALYTICS_SENTRY_TOKEN
 	./scripts/build/jq-insert.sh \
@@ -244,8 +241,8 @@ $(BUILD_DIRECTORY)/$(APPLICATION_NAME)-cli-$(TARGET_PLATFORM)-$(APPLICATION_VERS
 	| $(BUILD_DIRECTORY)
 	mkdir $@
 	cp $(word 1,$^) $@
-	cp $(word 2,$^) $@
-	cp -rf $(word 3,$^)/* $@
+	$(CPRF) $(word 2,$^) $@
+	$(CPRF) $(word 3,$^)/* $@
 
 $(BUILD_DIRECTORY)/$(APPLICATION_NAME)-cli-$(TARGET_PLATFORM)-$(APPLICATION_VERSION)-$(TARGET_ARCH).js: \
 	$(BUILD_DIRECTORY)/$(APPLICATION_NAME)-cli-$(TARGET_PLATFORM)-$(APPLICATION_VERSION)-$(TARGET_ARCH)-app \

binding.gyp

@@ -11,7 +11,7 @@
         [ 'OS=="win"', {
           "sources": [
             "src/utils/v8utils.cpp",
-            "src/os/elevate.cpp",
+            "src/os/win32/elevate.cpp",
             "src/elevator_init.cpp",
           ],
           "libraries": [

lib/shared/native-module.js

@@ -28,7 +28,7 @@ const bindings = require('bindings');
  * @returns {Object} native module
  *
  * @example
- * const elevator = bindings.load('elevator');
+ * const elevator = nativeModule.load('elevator');
  */
 exports.load = (moduleName) => {
   return bindings({

lib/shared/permissions.js

@@ -17,7 +17,7 @@
 'use strict';
 
 const os = require('os');
-const bindings = require('./bindings');
+const nativeModule = require('./native-module');
 const Bluebird = require('bluebird');
 const childProcess = Bluebird.promisifyAll(require('child_process'));
 const sudoPrompt = Bluebird.promisifyAll(require('sudo-prompt'));
@@ -146,7 +146,7 @@ exports.elevateCommand = (command, options) => {
   const prefixedCommand = _.concat(exports.getEnvironmentCommandPrefix(options.environment), command);
 
   if (os.platform() === 'win32') {
-    const elevator = Bluebird.promisifyAll(bindings.load('elevator'));
+    const elevator = Bluebird.promisifyAll(nativeModule.load('elevator'));
     return elevator.elevateAsync(_.concat([
       'cmd.exe',
       '/c'

scripts/build/dependencies-npm.sh

@@ -133,6 +133,11 @@ if [ -n "$ARGV_PREFIX" ]; then
     cp "$PWD/binding.gyp" "$ARGV_PREFIX/binding.gyp"
   fi
 
+  # Handle native code, if any
+  if [ -d "$PWD/src" ]; then
+    cp -RLf "$PWD/src" "$ARGV_PREFIX/src"
+  fi
+
   pushd "$ARGV_PREFIX"
   run_install
   popd
@@ -140,6 +145,7 @@ if [ -n "$ARGV_PREFIX" ]; then
   rm -f "$ARGV_PREFIX/package.json"
   rm -f "$ARGV_PREFIX/npm-shrinkwrap.json"
   rm -f "$ARGV_PREFIX/binding.gyp"
+  rm -rf "$ARGV_PREFIX/src"
 else
   run_install
 fi

src/os/elevate.h

@@ -17,6 +17,8 @@
  * limitations under the License.
  */
 
+#ifdef _WIN32
+
 // Fix winsock.h redefinition errors
 #ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
@@ -27,6 +29,8 @@
 #include <windows.h>
 #include <shellapi.h>
 
+#endif
+
 #include <algorithm>
 #include <iterator>
 #include <sstream>

src/os/win32/elevate.cpp

@@ -86,6 +86,8 @@ etcher::ELEVATE_RESULT etcher::Elevate(const std::string &command,
   if (!executeResult) {
     DWORD executeError = GetLastError();
 
+    // We map Windows error codes to our own enum class
+    // so we can normalize all Windows error handling mechanisms.
     switch (executeError) {
     case ERROR_FILE_NOT_FOUND:
       return etcher::ELEVATE_RESULT::ELEVATE_FILE_NOT_FOUND;