Export: Remove temp files from cache after export

So far we left most temporary files lying around, so this attempts to
fix that.

I added a helper method to DirAccess to factor out the boilerplate of
creating a DirAccess, checking if the file exists, remove it or print
an error on failure.

10 files changed, 194 insertions, 117 deletions

diff --git a/core/os/dir_access.h b/core/os/dir_access.h
index 704eedae5b..3c0528112b 100644
--- a/core/os/dir_access.h
+++ b/core/os/dir_access.h
@@ -97,6 +97,18 @@ public:
 	virtual Error rename(String p_from, String p_to) = 0;
 	virtual Error remove(String p_name) = 0;
 
+	// Meant for editor code when we want to quickly remove a file without custom
+	// handling (e.g. removing a cache file).
+	static void remove_file_or_error(String p_path) {
+		DirAccess *da = create(ACCESS_FILESYSTEM);
+		if (da->file_exists(p_path)) {
+			if (da->remove(p_path) != OK) {
+				ERR_FAIL_MSG("Cannot remove file or directory: " + p_path);
+			}
+		}
+		memdelete(da);
+	}
+
 	virtual String get_filesystem_type() const = 0;
 	static String get_full_path(const String &p_path, AccessType p_access);
 	static DirAccess *create_for_path(const String &p_path);
diff --git a/editor/editor_export.cpp b/editor/editor_export.cpp
index ed262d9c4f..e1f2635275 100644
--- a/editor/editor_export.cpp
+++ b/editor/editor_export.cpp
@@ -35,6 +35,7 @@
 #include "core/io/resource_saver.h"
 #include "core/io/zip_io.h"
 #include "core/math/crypto_core.h"
+#include "core/os/dir_access.h"
 #include "core/os/file_access.h"
 #include "core/project_settings.h"
 #include "core/script_language.h"
@@ -884,6 +885,7 @@ Error EditorExportPlatform::export_project_files(const Ref<EditorExportPreset> &
 	String engine_cfb = EditorSettings::get_singleton()->get_cache_dir().plus_file("tmp" + config_file);
 	ProjectSettings::get_singleton()->save_custom(engine_cfb, custom_map, custom_list);
 	Vector<uint8_t> data = FileAccess::get_file_as_array(engine_cfb);
+	DirAccess::remove_file_or_error(engine_cfb);
 
 	p_func(p_udata, "res://" + config_file, data, idx, total);
 
@@ -916,8 +918,10 @@ Error EditorExportPlatform::save_pack(const Ref<EditorExportPreset> &p_preset, c
 
 	memdelete(ftmp); //close tmp file
 
-	if (err)
+	if (err != OK) {
+		DirAccess::remove_file_or_error(tmppath);
 		return err;
+	}
 
 	pd.file_ofs.sort(); //do sort, so we can do binary search later
 
@@ -926,11 +930,17 @@ Error EditorExportPlatform::save_pack(const Ref<EditorExportPreset> &p_preset, c
 	if (!p_embed) {
 		// Regular output to separate PCK file
 		f = FileAccess::open(p_path, FileAccess::WRITE);
-		ERR_FAIL_COND_V(!f, ERR_CANT_CREATE);
+		if (!f) {
+			DirAccess::remove_file_or_error(tmppath);
+			ERR_FAIL_V(ERR_CANT_CREATE);
+		}
 	} else {
 		// Append to executable
 		f = FileAccess::open(p_path, FileAccess::READ_WRITE);
-		ERR_FAIL_COND_V(!f, ERR_FILE_CANT_OPEN);
+		if (!f) {
+			DirAccess::remove_file_or_error(tmppath);
+			ERR_FAIL_V(ERR_FILE_CANT_OPEN);
+		}
 
 		f->seek_end();
 		embed_pos = f->get_position();
@@ -995,13 +1005,13 @@ Error EditorExportPlatform::save_pack(const Ref<EditorExportPreset> &p_preset, c
 		f->store_8(0);
 	}
 
-	//save the rest of the data
+	// Save the rest of the data.
 
 	ftmp = FileAccess::open(tmppath, FileAccess::READ);
 	if (!ftmp) {
 		memdelete(f);
-		ERR_EXPLAIN("Can't open file to read from path: " + String(tmppath));
-		ERR_FAIL_V(ERR_CANT_CREATE);
+		DirAccess::remove_file_or_error(tmppath);
+		ERR_FAIL_V_MSG(ERR_CANT_CREATE, "Can't open file to read from path: " + String(tmppath));
 	}
 
 	const int bufsize = 16384;
@@ -1035,6 +1045,7 @@ Error EditorExportPlatform::save_pack(const Ref<EditorExportPreset> &p_preset, c
 	}
 
 	memdelete(f);
+	DirAccess::remove_file_or_error(tmppath);
 
 	return OK;
 }
@@ -1043,8 +1054,6 @@ Error EditorExportPlatform::save_zip(const Ref<EditorExportPreset> &p_preset, co
 
 	EditorProgress ep("savezip", TTR("Packing"), 102, true);
 
-	//FileAccess *tmp = FileAccess::open(tmppath,FileAccess::WRITE);
-
 	FileAccess *src_f;
 	zlib_filefunc_def io = zipio_create_io_from_file(&src_f);
 	zipFile zip = zipOpen2(p_path.utf8().get_data(), APPEND_STATUS_CREATE, NULL, &io);
@@ -1694,11 +1703,18 @@ void EditorExportTextSceneToBinaryPlugin::_export_file(const String &p_path, con
 	bool convert = GLOBAL_GET("editor/convert_text_resources_to_binary_on_export");
 	if (!convert)
 		return;
-	String tmp_path = EditorSettings::get_singleton()->get_cache_dir().plus_file("file.res");
+	String tmp_path = EditorSettings::get_singleton()->get_cache_dir().plus_file("tmpfile.res");
 	Error err = ResourceFormatLoaderText::convert_file_to_binary(p_path, tmp_path);
-	ERR_FAIL_COND(err != OK);
+	if (err != OK) {
+		DirAccess::remove_file_or_error(tmp_path);
+		ERR_FAIL();
+	}
 	Vector<uint8_t> data = FileAccess::get_file_as_array(tmp_path);
-	ERR_FAIL_COND(data.size() == 0);
+	if (data.size() == 0) {
+		DirAccess::remove_file_or_error(tmp_path);
+		ERR_FAIL();
+	}
+	DirAccess::remove_file_or_error(tmp_path);
 	add_file(p_path + ".converted.res", data, true);
 }
 
diff --git a/editor/export_template_manager.cpp b/editor/export_template_manager.cpp
index ecfad4d146..8a5f77c25f 100644
--- a/editor/export_template_manager.cpp
+++ b/editor/export_template_manager.cpp
@@ -422,14 +422,16 @@ void ExportTemplateManager::_http_download_templates_completed(int p_status, int
 				String path = download_templates->get_download_file();
 				template_list_state->set_text(TTR("Download Complete."));
 				template_downloader->hide();
-				int ret = _install_from_file(path, false);
+				bool ret = _install_from_file(path, false);
 				if (ret) {
-					Error err = OS::get_singleton()->move_to_trash(path);
+					// Clean up downloaded file.
+					DirAccessRef da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
+					Error err = da->remove(path);
 					if (err != OK) {
-						EditorNode::get_singleton()->add_io_error(TTR("Cannot remove:") + "\n" + path + "\n");
+						EditorNode::get_singleton()->add_io_error(TTR("Cannot remove temporary file:") + "\n" + path + "\n");
 					}
 				} else {
-					WARN_PRINTS(vformat(TTR("Templates installation failed. The problematic templates archives can be found at '%s'."), path));
+					EditorNode::get_singleton()->add_io_error(vformat(TTR("Templates installation failed.\nThe problematic templates archives can be found at '%s'."), path));
 				}
 			}
 		} break;
@@ -458,7 +460,7 @@ void ExportTemplateManager::_begin_template_download(const String &p_url) {
 
 	Error err = download_templates->request(p_url);
 	if (err != OK) {
-		EditorNode::get_singleton()->show_warning(TTR("Error requesting url: ") + p_url);
+		EditorNode::get_singleton()->show_warning(TTR("Error requesting URL:") + " " + p_url);
 		return;
 	}
 
diff --git a/editor/plugins/asset_library_editor_plugin.cpp b/editor/plugins/asset_library_editor_plugin.cpp
index 4a2295fab2..5679426eb5 100644
--- a/editor/plugins/asset_library_editor_plugin.cpp
+++ b/editor/plugins/asset_library_editor_plugin.cpp
@@ -354,16 +354,16 @@ void EditorAssetLibraryItemDownload::_http_download_completed(int p_status, int
 		} break;
 		case HTTPRequest::RESULT_REQUEST_FAILED: {
 			error_text = TTR("Request failed, return code:") + " " + itos(p_code);
-			status->set_text(TTR("Request Failed."));
+			status->set_text(TTR("Request failed."));
 		} break;
 		case HTTPRequest::RESULT_DOWNLOAD_FILE_CANT_OPEN:
 		case HTTPRequest::RESULT_DOWNLOAD_FILE_WRITE_ERROR: {
-			error_text = TTR("Cannot save response to") + " " + download->get_download_file();
+			error_text = TTR("Cannot save response to:") + " " + download->get_download_file();
 			status->set_text(TTR("Write error."));
 		} break;
 		case HTTPRequest::RESULT_REDIRECT_LIMIT_REACHED: {
 			error_text = TTR("Request failed, too many redirects");
-			status->set_text(TTR("Redirect Loop."));
+			status->set_text(TTR("Redirect loop."));
 		} break;
 		case HTTPRequest::RESULT_TIMEOUT: {
 			error_text = TTR("Request failed, timeout");
@@ -472,9 +472,8 @@ void EditorAssetLibraryItemDownload::_notification(int p_what) {
 }
 void EditorAssetLibraryItemDownload::_close() {
 
-	DirAccess *da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
-	da->remove(download->get_download_file()); //clean up removed file
-	memdelete(da);
+	// Clean up downloaded file.
+	DirAccess::remove_file_or_error(download->get_download_file());
 	queue_delete();
 }
 
diff --git a/editor/pvrtc_compress.cpp b/editor/pvrtc_compress.cpp
index 84cd6da3d9..7cdd900d25 100644
--- a/editor/pvrtc_compress.cpp
+++ b/editor/pvrtc_compress.cpp
@@ -32,6 +32,7 @@
 
 #include "core/io/resource_loader.h"
 #include "core/io/resource_saver.h"
+#include "core/os/dir_access.h"
 #include "core/os/file_access.h"
 #include "core/os/os.h"
 #include "editor_settings.h"
@@ -52,57 +53,75 @@ static void _compress_image(Image::CompressMode p_mode, Image *p_image) {
 					_base_image_compress_pvrtc2_func(p_image);
 				else if (_base_image_compress_pvrtc4_func)
 					_base_image_compress_pvrtc4_func(p_image);
-
 				break;
 			case Image::COMPRESS_PVRTC4:
 				if (_base_image_compress_pvrtc4_func)
 					_base_image_compress_pvrtc4_func(p_image);
-
 				break;
-			default: ERR_FAIL();
+			default:
+				ERR_FAIL_MSG("Unsupported Image compress mode used in PVRTC module.");
 		}
 		return;
 	}
-	String tmppath = EditorSettings::get_singleton()->get_cache_dir();
-
-	List<String> args;
 
+	String tmppath = EditorSettings::get_singleton()->get_cache_dir();
 	String src_img = tmppath.plus_file("_tmp_src_img.png");
 	String dst_img = tmppath.plus_file("_tmp_dst_img.pvr");
 
+	List<String> args;
 	args.push_back("-i");
 	args.push_back(src_img);
 	args.push_back("-o");
 	args.push_back(dst_img);
 	args.push_back("-f");
-	switch (p_mode) {
 
-		case Image::COMPRESS_PVRTC2: args.push_back("PVRTC2"); break;
-		case Image::COMPRESS_PVRTC4: args.push_back("PVRTC4"); break;
-		case Image::COMPRESS_ETC: args.push_back("ETC"); break;
-		default: ERR_FAIL();
+	switch (p_mode) {
+		case Image::COMPRESS_PVRTC2:
+			args.push_back("PVRTC2");
+			break;
+		case Image::COMPRESS_PVRTC4:
+			args.push_back("PVRTC4");
+			break;
+		case Image::COMPRESS_ETC:
+			args.push_back("ETC");
+			break;
+		default:
+			ERR_FAIL_MSG("Unsupported Image compress mode used in PVRTC module.");
 	}
 
 	if (EditorSettings::get_singleton()->get("filesystem/import/pvrtc_fast_conversion").operator bool()) {
 		args.push_back("-pvrtcfast");
 	}
-	if (p_image->has_mipmaps())
+	if (p_image->has_mipmaps()) {
 		args.push_back("-m");
+	}
 
+	// Save source PNG.
 	Ref<ImageTexture> t = memnew(ImageTexture);
 	t->create_from_image(Ref<Image>(p_image), 0);
 	ResourceSaver::save(src_img, t);
 
 	Error err = OS::get_singleton()->execute(ttpath, args, true);
-	ERR_EXPLAIN(TTR("Could not execute PVRTC tool:") + " " + ttpath);
-	ERR_FAIL_COND(err != OK);
+	if (err != OK) {
+		// Clean up generated files.
+		DirAccess::remove_file_or_error(src_img);
+		DirAccess::remove_file_or_error(dst_img);
+		ERR_FAIL_MSG("Could not execute PVRTC tool: " + ttpath);
+	}
 
 	t = ResourceLoader::load(dst_img, "Texture");
-
-	ERR_EXPLAIN(TTR("Can't load back converted image using PVRTC tool:") + " " + dst_img);
-	ERR_FAIL_COND(t.is_null());
+	if (t.is_null()) {
+		// Clean up generated files.
+		DirAccess::remove_file_or_error(src_img);
+		DirAccess::remove_file_or_error(dst_img);
+		ERR_FAIL_MSG("Can't load back converted image using PVRTC tool.");
+	}
 
 	p_image->copy_internals_from(t->get_data());
+
+	// Clean up generated files.
+	DirAccess::remove_file_or_error(src_img);
+	DirAccess::remove_file_or_error(dst_img);
 }
 
 static void _compress_pvrtc2(Image *p_image) {
diff --git a/modules/gdscript/register_types.cpp b/modules/gdscript/register_types.cpp
index b8a13ed91b..62117dcaf3 100644
--- a/modules/gdscript/register_types.cpp
+++ b/modules/gdscript/register_types.cpp
@@ -32,6 +32,7 @@
 
 #include "core/io/file_access_encrypted.h"
 #include "core/io/resource_loader.h"
+#include "core/os/dir_access.h"
 #include "core/os/file_access.h"
 #include "editor/gdscript_highlighter.h"
 #include "gdscript.h"
@@ -117,6 +118,9 @@ public:
 				file = FileAccess::get_file_as_array(tmp_path);
 				add_file(p_path.get_basename() + ".gde", file, true);
 
+				// Clean up temporary file.
+				DirAccess::remove_file_or_error(tmp_path);
+
 			} else {
 
 				add_file(p_path.get_basename() + ".gdc", file, true);
diff --git a/platform/android/export/export.cpp b/platform/android/export/export.cpp
index dc0a63d171..16e49e8a38 100644
--- a/platform/android/export/export.cpp
+++ b/platform/android/export/export.cpp
@@ -32,6 +32,7 @@
 
 #include "core/io/marshalls.h"
 #include "core/io/zip_io.h"
+#include "core/os/dir_access.h"
 #include "core/os/file_access.h"
 #include "core/os/os.h"
 #include "core/project_settings.h"
@@ -1398,8 +1399,9 @@ public:
 			return ERR_UNCONFIGURED;
 		}
 
-		//export_temp
+		// Export_temp APK.
 		if (ep.step("Exporting APK", 0)) {
+			device_lock->unlock();
 			return ERR_SKIP;
 		}
 
@@ -1409,11 +1411,20 @@ public:
 		if (use_reverse)
 			p_debug_flags |= DEBUG_FLAG_REMOTE_DEBUG_LOCALHOST;
 
-		String export_to = EditorSettings::get_singleton()->get_cache_dir().plus_file("tmpexport.apk");
-		Error err = export_project(p_preset, true, export_to, p_debug_flags);
-		if (err) {
-			device_lock->unlock();
-			return err;
+		String tmp_export_path = EditorSettings::get_singleton()->get_cache_dir().plus_file("tmpexport.apk");
+
+#define CLEANUP_AND_RETURN(m_err)                         \
+	{                                                     \
+		DirAccess::remove_file_or_error(tmp_export_path); \
+		device_lock->unlock();                            \
+		return m_err;                                     \
+	}
+
+		// Export to temporary APK before sending to device.
+		Error err = export_project(p_preset, true, tmp_export_path, p_debug_flags);
+
+		if (err != OK) {
+			CLEANUP_AND_RETURN(err);
 		}
 
 		List<String> args;
@@ -1425,7 +1436,7 @@ public:
 
 		if (remove_prev) {
 			if (ep.step("Uninstalling...", 1)) {
-				return ERR_SKIP;
+				CLEANUP_AND_RETURN(ERR_SKIP);
 			}
 
 			print_line("Uninstalling previous version: " + devices[p_device].name);
@@ -1440,7 +1451,7 @@ public:
 
 		print_line("Installing to device (please wait...): " + devices[p_device].name);
 		if (ep.step("Installing to device (please wait...)", 2)) {
-			return ERR_SKIP;
+			CLEANUP_AND_RETURN(ERR_SKIP);
 		}
 
 		args.clear();
@@ -1448,13 +1459,12 @@ public:
 		args.push_back(devices[p_device].id);
 		args.push_back("install");
 		args.push_back("-r");
-		args.push_back(export_to);
+		args.push_back(tmp_export_path);
 
 		err = OS::get_singleton()->execute(adb, args, true, NULL, NULL, &rv);
 		if (err || rv != 0) {
 			EditorNode::add_io_error("Could not install to device.");
-			device_lock->unlock();
-			return ERR_CANT_CREATE;
+			CLEANUP_AND_RETURN(ERR_CANT_CREATE);
 		}
 
 		if (use_remote) {
@@ -1508,7 +1518,7 @@ public:
 		}
 
 		if (ep.step("Running on Device...", 3)) {
-			return ERR_SKIP;
+			CLEANUP_AND_RETURN(ERR_SKIP);
 		}
 		args.clear();
 		args.push_back("-s");
@@ -1528,11 +1538,11 @@ public:
 		err = OS::get_singleton()->execute(adb, args, true, NULL, NULL, &rv);
 		if (err || rv != 0) {
 			EditorNode::add_io_error("Could not execute on device.");
-			device_lock->unlock();
-			return ERR_CANT_CREATE;
+			CLEANUP_AND_RETURN(ERR_CANT_CREATE);
 		}
-		device_lock->unlock();
-		return OK;
+
+		CLEANUP_AND_RETURN(OK);
+#undef CLEANUP_AND_RETURN
 	}
 
 	virtual Ref<Texture> get_run_icon() const {
@@ -2023,8 +2033,16 @@ public:
 		zlib_filefunc_def io2 = io;
 		FileAccess *dst_f = NULL;
 		io2.opaque = &dst_f;
-		String unaligned_path = EditorSettings::get_singleton()->get_cache_dir().plus_file("tmpexport-unaligned.apk");
-		zipFile unaligned_apk = zipOpen2(unaligned_path.utf8().get_data(), APPEND_STATUS_CREATE, NULL, &io2);
+
+		String tmp_unaligned_path = EditorSettings::get_singleton()->get_cache_dir().plus_file("tmpexport-unaligned.apk");
+
+#define CLEANUP_AND_RETURN(m_err)                            \
+	{                                                        \
+		DirAccess::remove_file_or_error(tmp_unaligned_path); \
+		return m_err;                                        \
+	}
+
+		zipFile unaligned_apk = zipOpen2(tmp_unaligned_path.utf8().get_data(), APPEND_STATUS_CREATE, NULL, &io2);
 
 		bool use_32_fb = p_preset->get("graphics/32_bits_framebuffer");
 		bool immersive = p_preset->get("screen/immersive_mode");
@@ -2152,7 +2170,7 @@ public:
 		}
 
 		if (ep.step("Adding Files...", 1)) {
-			return ERR_SKIP;
+			CLEANUP_AND_RETURN(ERR_SKIP);
 		}
 		Error err = OK;
 		Vector<String> cl = cmdline.strip_edges().split(" ");
@@ -2184,7 +2202,7 @@ public:
 					unzClose(pkg);
 					EditorNode::add_io_error("Could not write expansion package file: " + apkfname);
 
-					return OK;
+					CLEANUP_AND_RETURN(ERR_SKIP);
 				}
 
 				cl.push_back("--use_apk_expansion");
@@ -2271,8 +2289,8 @@ public:
 		zipClose(unaligned_apk, NULL);
 		unzClose(pkg);
 
-		if (err) {
-			return err;
+		if (err != OK) {
+			CLEANUP_AND_RETURN(err);
 		}
 
 		if (_signed) {
@@ -2280,7 +2298,7 @@ public:
 			String jarsigner = EditorSettings::get_singleton()->get("export/android/jarsigner");
 			if (!FileAccess::exists(jarsigner)) {
 				EditorNode::add_io_error("'jarsigner' could not be found.\nPlease supply a path in the Editor Settings.\nThe resulting APK is unsigned.");
-				return OK;
+				CLEANUP_AND_RETURN(OK);
 			}
 
 			String keystore;
@@ -2300,7 +2318,7 @@ public:
 				}
 
 				if (ep.step("Signing debug APK...", 103)) {
-					return ERR_SKIP;
+					CLEANUP_AND_RETURN(ERR_SKIP);
 				}
 
 			} else {
@@ -2309,13 +2327,13 @@ public:
 				user = release_username;
 
 				if (ep.step("Signing release APK...", 103)) {
-					return ERR_SKIP;
+					CLEANUP_AND_RETURN(ERR_SKIP);
 				}
 			}
 
 			if (!FileAccess::exists(keystore)) {
 				EditorNode::add_io_error("Could not find keystore, unable to export.");
-				return ERR_FILE_CANT_OPEN;
+				CLEANUP_AND_RETURN(ERR_FILE_CANT_OPEN);
 			}
 
 			List<String> args;
@@ -2333,30 +2351,30 @@ public:
 			args.push_back(keystore);
 			args.push_back("-storepass");
 			args.push_back(password);
-			args.push_back(unaligned_path);
+			args.push_back(tmp_unaligned_path);
 			args.push_back(user);
 			int retval;
 			OS::get_singleton()->execute(jarsigner, args, true, NULL, NULL, &retval);
 			if (retval) {
 				EditorNode::add_io_error("'jarsigner' returned with error #" + itos(retval));
-				return ERR_CANT_CREATE;
+				CLEANUP_AND_RETURN(ERR_CANT_CREATE);
 			}
 
 			if (ep.step("Verifying APK...", 104)) {
-				return ERR_SKIP;
+				CLEANUP_AND_RETURN(ERR_SKIP);
 			}
 
 			args.clear();
 			args.push_back("-verify");
 			args.push_back("-keystore");
 			args.push_back(keystore);
-			args.push_back(unaligned_path);
+			args.push_back(tmp_unaligned_path);
 			args.push_back("-verbose");
 
 			OS::get_singleton()->execute(jarsigner, args, true, NULL, NULL, &retval);
 			if (retval) {
 				EditorNode::add_io_error("'jarsigner' verification of APK failed. Make sure to use a jarsigner from OpenJDK 8.");
-				return ERR_CANT_CREATE;
+				CLEANUP_AND_RETURN(ERR_CANT_CREATE);
 			}
 		}
 
@@ -2365,14 +2383,14 @@ public:
 		static const int ZIP_ALIGNMENT = 4;
 
 		if (ep.step("Aligning APK...", 105)) {
-			return ERR_SKIP;
+			CLEANUP_AND_RETURN(ERR_SKIP);
 		}
 
-		unzFile tmp_unaligned = unzOpen2(unaligned_path.utf8().get_data(), &io);
+		unzFile tmp_unaligned = unzOpen2(tmp_unaligned_path.utf8().get_data(), &io);
 		if (!tmp_unaligned) {
 
-			EditorNode::add_io_error("Could not find temp unaligned APK.");
-			return ERR_FILE_NOT_FOUND;
+			EditorNode::add_io_error("Could not unzip temporary unaligned APK.");
+			CLEANUP_AND_RETURN(ERR_FILE_NOT_FOUND);
 		}
 
 		ret = unzGoToFirstFile(tmp_unaligned);
@@ -2442,7 +2460,7 @@ public:
 		zipClose(final_apk, NULL);
 		unzClose(tmp_unaligned);
 
-		return OK;
+		CLEANUP_AND_RETURN(OK);
 	}
 
 	virtual void get_platform_features(List<String> *r_features) {
diff --git a/platform/javascript/export/export.cpp b/platform/javascript/export/export.cpp
index c68b420c61..69dd038709 100644
--- a/platform/javascript/export/export.cpp
+++ b/platform/javascript/export/export.cpp
@@ -362,12 +362,21 @@ int EditorExportPlatformJavaScript::get_device_count() const {
 
 Error EditorExportPlatformJavaScript::run(const Ref<EditorExportPreset> &p_preset, int p_device, int p_debug_flags) {
 
-	String path = EditorSettings::get_singleton()->get_cache_dir().plus_file("tmp_export.html");
+	String basepath = EditorSettings::get_singleton()->get_cache_dir().plus_file("tmp_js_export");
+	String path = basepath + ".html";
 	Error err = export_project(p_preset, true, path, p_debug_flags);
-	if (err) {
+	if (err != OK) {
+		// Export generates several files, clean them up on failure.
+		DirAccess::remove_file_or_error(basepath + ".html");
+		DirAccess::remove_file_or_error(basepath + ".js");
+		DirAccess::remove_file_or_error(basepath + ".pck");
+		DirAccess::remove_file_or_error(basepath + ".png");
+		DirAccess::remove_file_or_error(basepath + ".wasm");
 		return err;
 	}
 	OS::get_singleton()->shell_open(String("file://") + path);
+	// FIXME: Find out how to clean up export files after running the successfully
+	// exported game. Might not be trivial.
 	return OK;
 }
 
diff --git a/platform/osx/export/export.cpp b/platform/osx/export/export.cpp
index 8cabc45250..56b0a44dbc 100644
--- a/platform/osx/export/export.cpp
+++ b/platform/osx/export/export.cpp
@@ -29,9 +29,11 @@
 /*************************************************************************/
 
 #include "export.h"
+
 #include "core/io/marshalls.h"
 #include "core/io/resource_saver.h"
 #include "core/io/zip_io.h"
+#include "core/os/dir_access.h"
 #include "core/os/file_access.h"
 #include "core/os/os.h"
 #include "core/project_settings.h"
@@ -244,13 +246,17 @@ void EditorExportPlatformOSX::_make_icon(const Ref<Image> &p_icon, Vector<uint8_
 		copy->resize(icon_infos[i].size, icon_infos[i].size);
 
 		if (icon_infos[i].is_png) {
-			//encode png icon
+			// Encode PNG icon.
 			it->create_from_image(copy);
 			String path = EditorSettings::get_singleton()->get_cache_dir().plus_file("icon.png");
 			ResourceSaver::save(path, it);
 
 			FileAccess *f = FileAccess::open(path, FileAccess::READ);
-			ERR_FAIL_COND(!f);
+			if (!f) {
+				// Clean up generated file.
+				DirAccess::remove_file_or_error(path);
+				ERR_FAIL();
+			}
 
 			int ofs = data.size();
 			uint32_t len = f->get_len();
@@ -261,6 +267,10 @@ void EditorExportPlatformOSX::_make_icon(const Ref<Image> &p_icon, Vector<uint8_
 			len = BSWAP32(len);
 			copymem(&data.write[ofs], icon_infos[i].name, 4);
 			encode_uint32(len, &data.write[ofs + 4]);
+
+			// Clean up generated file.
+			DirAccess::remove_file_or_error(path);
+
 		} else {
 			PoolVector<uint8_t> src_data = copy->get_data();
 
@@ -561,7 +571,6 @@ Error EditorExportPlatformOSX::export_project(const Ref<EditorExportPreset> &p_p
 					}
 				}
 			}
-			//bleh?
 		}
 
 		if (data.size() > 0) {
@@ -687,7 +696,8 @@ Error EditorExportPlatformOSX::export_project(const Ref<EditorExportPreset> &p_p
 
 			// Clean up temporary .app dir
 			OS::get_singleton()->move_to_trash(tmp_app_path_name);
-		} else {
+
+		} else { // pck
 
 			String pack_path = EditorSettings::get_singleton()->get_cache_dir().plus_file(pkg_name + ".pck");
 
@@ -747,6 +757,9 @@ Error EditorExportPlatformOSX::export_project(const Ref<EditorExportPreset> &p_p
 					zipCloseFileInZip(dst_pkg_zip);
 				}
 			}
+
+			// Clean up generated file.
+			DirAccess::remove_file_or_error(pack_path);
 		}
 	}
 
diff --git a/platform/uwp/export/export.cpp b/platform/uwp/export/export.cpp
index 024e7f1916..662ee49935 100644
--- a/platform/uwp/export/export.cpp
+++ b/platform/uwp/export/export.cpp
@@ -34,6 +34,7 @@
 #include "core/io/zip_io.h"
 #include "core/math/crypto_core.h"
 #include "core/object.h"
+#include "core/os/dir_access.h"
 #include "core/os/file_access.h"
 #include "core/project_settings.h"
 #include "core/version.h"
@@ -133,8 +134,6 @@ class AppxPackager {
 
 	String progress_task;
 	FileAccess *package;
-	String tmp_blockmap_file_path;
-	String tmp_content_types_file_path;
 
 	Set<String> mime_types;
 
@@ -146,8 +145,8 @@ class AppxPackager {
 
 	String hash_block(const uint8_t *p_block_data, size_t p_block_len);
 
-	void make_block_map();
-	void make_content_types();
+	void make_block_map(const String &p_path);
+	void make_content_types(const String &p_path);
 
 	_FORCE_INLINE_ unsigned int buf_put_int16(uint16_t p_val, uint8_t *p_buf) {
 		for (int i = 0; i < 2; i++) {
@@ -208,9 +207,9 @@ String AppxPackager::hash_block(const uint8_t *p_block_data, size_t p_block_len)
 	return String(base64);
 }
 
-void AppxPackager::make_block_map() {
+void AppxPackager::make_block_map(const String &p_path) {
 
-	FileAccess *tmp_file = FileAccess::open(tmp_blockmap_file_path, FileAccess::WRITE);
+	FileAccess *tmp_file = FileAccess::open(p_path, FileAccess::WRITE);
 
 	tmp_file->store_string("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>");
 	tmp_file->store_string("<BlockMap xmlns=\"http://schemas.microsoft.com/appx/2010/blockmap\" HashMethod=\"http://www.w3.org/2001/04/xmlenc#sha256\">");
@@ -253,9 +252,9 @@ String AppxPackager::content_type(String p_extension) {
 		return "application/octet-stream";
 }
 
-void AppxPackager::make_content_types() {
+void AppxPackager::make_content_types(const String &p_path) {
 
-	FileAccess *tmp_file = FileAccess::open(tmp_content_types_file_path, FileAccess::WRITE);
+	FileAccess *tmp_file = FileAccess::open(p_path, FileAccess::WRITE);
 
 	tmp_file->store_string("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
 	tmp_file->store_string("<Types xmlns=\"http://schemas.openxmlformats.org/package/2006/content-types\">");
@@ -458,8 +457,6 @@ void AppxPackager::init(FileAccess *p_fa) {
 	package = p_fa;
 	central_dir_offset = 0;
 	end_of_central_dir_offset = 0;
-	tmp_blockmap_file_path = EditorSettings::get_singleton()->get_cache_dir().plus_file("tmpblockmap.xml");
-	tmp_content_types_file_path = EditorSettings::get_singleton()->get_cache_dir().plus_file("tmpcontenttypes.xml");
 }
 
 Error AppxPackager::add_file(String p_file_name, const uint8_t *p_buffer, size_t p_len, int p_file_no, int p_total_files, bool p_compress) {
@@ -591,7 +588,9 @@ void AppxPackager::finish() {
 	// Create and add block map file
 	EditorNode::progress_task_step("export", "Creating block map...", 4);
 
-	make_block_map();
+	const String &tmp_blockmap_file_path = EditorSettings::get_singleton()->get_cache_dir().plus_file("tmpblockmap.xml");
+	make_block_map(tmp_blockmap_file_path);
+
 	FileAccess *blockmap_file = FileAccess::open(tmp_blockmap_file_path, FileAccess::READ);
 	Vector<uint8_t> blockmap_buffer;
 	blockmap_buffer.resize(blockmap_file->get_len());
@@ -604,8 +603,11 @@ void AppxPackager::finish() {
 	memdelete(blockmap_file);
 
 	// Add content types
+
 	EditorNode::progress_task_step("export", "Setting content types...", 5);
-	make_content_types();
+
+	const String &tmp_content_types_file_path = EditorSettings::get_singleton()->get_cache_dir().plus_file("tmpcontenttypes.xml");
+	make_content_types(tmp_content_types_file_path);
 
 	FileAccess *types_file = FileAccess::open(tmp_content_types_file_path, FileAccess::READ);
 	Vector<uint8_t> types_buffer;
@@ -618,6 +620,10 @@ void AppxPackager::finish() {
 	types_file->close();
 	memdelete(types_file);
 
+	// Cleanup generated files.
+	DirAccess::remove_file_or_error(tmp_blockmap_file_path);
+	DirAccess::remove_file_or_error(tmp_content_types_file_path);
+
 	// Pre-process central directory before signing
 	for (int i = 0; i < file_metadata.size(); i++) {
 		store_central_dir_header(file_metadata[i]);
@@ -909,7 +915,8 @@ class EditorExportPlatformUWP : public EditorExportPlatform {
 		if (err != OK) {
 
 			String err_string = "Couldn't open temp logo file.";
-
+			// Cleanup generated file.
+			DirAccess::remove_file_or_error(tmp_path);
 			EditorNode::add_io_error(err_string);
 			ERR_FAIL_V_MSG(data, err_string);
 		}
@@ -919,29 +926,7 @@ class EditorExportPlatformUWP : public EditorExportPlatform {
 
 		f->close();
 		memdelete(f);
-
-		// Delete temp file
-		DirAccess *dir = DirAccess::open(tmp_path.get_base_dir(), &err);
-
-		if (err != OK) {
-
-			String err_string = "Couldn't open temp path to remove temp logo file.";
-
-			EditorNode::add_io_error(err_string);
-			ERR_FAIL_V_MSG(data, err_string);
-		}
-
-		err = dir->remove(tmp_path);
-
-		memdelete(dir);
-
-		if (err != OK) {
-
-			String err_string = "Couldn't remove temp logo file.";
-
-			EditorNode::add_io_error(err_string);
-			ERR_FAIL_V_MSG(data, err_string);
-		}
+		DirAccess::remove_file_or_error(tmp_path);
 
 		return data;
 	}