- Make homedir work on windows

- add test cases for homedir

src/cpp-utils/system/homedir.cpp

@@ -1,27 +1,14 @@
 #include "homedir.h"
 #include <sys/types.h>
-#include <pwd.h>
 
 namespace bf = boost::filesystem;
 using std::string;
 
-namespace cpputils {
-    namespace system {
+#if !defined(_MSC_VER)
 
-        HomeDirectory::HomeDirectory()
-                :_home_directory(_get_home_directory()) {
-        }
-
-        HomeDirectory &HomeDirectory::singleton() {
-            static HomeDirectory _singleton;
-            return _singleton;
-        }
-
-        const bf::path &HomeDirectory::get() {
-            return singleton()._home_directory;
-        }
-
-        bf::path HomeDirectory::_get_home_directory() {
+#include <pwd.h>
+namespace {
+	bf::path _get_home_directory() {
 		struct passwd* pwd = getpwuid(getuid());
 		string homedir;
 		if (pwd) {
@@ -36,23 +23,87 @@ namespace cpputils {
 		return homedir;
 	}
 
-        bf::path HomeDirectory::getXDGDataDir() {
+	bf::path _get_appdata_directory() {
 		const char* xdg_data_dir = std::getenv("XDG_DATA_HOME");
 		if (xdg_data_dir != nullptr) {
 			return xdg_data_dir;
 		}
 
-            return cpputils::system::HomeDirectory::get() / ".local" / "share";
+		return _get_home_directory() / ".local" / "share";
+	}
+}
+
+#else
+
+#include <Shlobj.h>
+namespace {
+	struct PathBuffer final {
+		PWSTR path = nullptr;
+
+		~PathBuffer() {
+			CoTaskMemFree(path);
+		}
+	};
+
+	bf::path _get_known_path(KNOWNFOLDERID folderId) {
+		PathBuffer path;
+		HRESULT result_code = ::SHGetKnownFolderPath(folderId, 0, nullptr, &path.path);
+		if (S_OK != result_code) {
+			throw std::runtime_error("Failed getting user home directory. Hresult: " + std::to_string(result_code));
+		}
+		bf::path result(path.path);
+		return result;
 	}
 
-        FakeHomeDirectoryRAII::FakeHomeDirectoryRAII(const boost::filesystem::path &fakeHomeDirectory)
-                :_oldHomeDirectory(HomeDirectory::singleton()._home_directory) {
+	bf::path _get_home_directory() {
+		return _get_known_path(FOLDERID_Profile);
+	}
+
+	bf::path _get_appdata_directory() {
+		return _get_known_path(FOLDERID_LocalAppData);
+	}
+}
+
+#endif
+
+namespace bf = boost::filesystem;
+using std::string;
+
+namespace cpputils {
+    namespace system {
+
+        HomeDirectory::HomeDirectory()
+             : _home_directory(::_get_home_directory())
+			 , _appdata_directory(::_get_appdata_directory()) {
+        }
+
+        HomeDirectory &HomeDirectory::singleton() {
+            static HomeDirectory _singleton;
+            return _singleton;
+        }
+
+        const bf::path &HomeDirectory::get() {
+            return singleton()._home_directory;
+        }
+
+        const bf::path &HomeDirectory::getXDGDataDir() {
+			return singleton()._appdata_directory;
+        }
+
+        FakeHomeDirectoryRAII::FakeHomeDirectoryRAII(const bf::path& fakeHomeDirectory, const bf::path& fakeAppdataDirectory)
+                : _oldHomeDirectory(HomeDirectory::singleton()._home_directory)
+		        , _oldAppdataDirectory(HomeDirectory::singleton()._appdata_directory) {
             HomeDirectory::singleton()._home_directory = fakeHomeDirectory;
+			HomeDirectory::singleton()._appdata_directory = fakeAppdataDirectory;
         }
 
         FakeHomeDirectoryRAII::~FakeHomeDirectoryRAII() {
             // Reset to old (non-fake) value
             HomeDirectory::singleton()._home_directory = _oldHomeDirectory;
+			HomeDirectory::singleton()._appdata_directory = _oldAppdataDirectory;
         }
+
+		FakeTempHomeDirectoryRAII::FakeTempHomeDirectoryRAII()
+			: _tempDir(), _fakeHome(_tempDir.path() / "home", _tempDir.path() / "appdata") {}
     }
 }

src/cpp-utils/system/homedir.h

@@ -5,6 +5,7 @@
 #include <boost/filesystem/path.hpp>
 #include "../macros.h"
 #include <cpp-utils/pointer/unique_ref.h>
+#include "../tempfile/TempDir.h"
 
 namespace cpputils {
     namespace system {
@@ -15,14 +16,14 @@ namespace cpputils {
         public:
             static const boost::filesystem::path &get();
 
-            static boost::filesystem::path getXDGDataDir();
+            static const boost::filesystem::path &getXDGDataDir();
 
         private:
             boost::filesystem::path _home_directory;
+			boost::filesystem::path _appdata_directory;
 
             HomeDirectory();
             static HomeDirectory &singleton();
-            boost::filesystem::path _get_home_directory();
 
             friend class FakeHomeDirectoryRAII;
 
@@ -32,15 +33,27 @@ namespace cpputils {
 
         class FakeHomeDirectoryRAII final {
         public:
-            FakeHomeDirectoryRAII(const boost::filesystem::path &fakeHomeDirectory);
+            FakeHomeDirectoryRAII(const boost::filesystem::path &fakeHomeDirectory, const boost::filesystem::path &fakeAppdataDirectory);
             ~FakeHomeDirectoryRAII();
 
         private:
             boost::filesystem::path _oldHomeDirectory;
+			boost::filesystem::path _oldAppdataDirectory;
 
             DISALLOW_COPY_AND_ASSIGN(FakeHomeDirectoryRAII);
         };
 
+		class FakeTempHomeDirectoryRAII final {
+		public:
+			FakeTempHomeDirectoryRAII();
+
+		private:
+			TempDir _tempDir;
+			FakeHomeDirectoryRAII _fakeHome;
+
+			DISALLOW_COPY_AND_ASSIGN(FakeTempHomeDirectoryRAII);
+		};
+
     }
 }
 

test/cpp-utils/CMakeLists.txt

@@ -46,6 +46,7 @@ set(SOURCES
     assert/assert_include_test.cpp
     assert/assert_debug_test.cpp
     system/MemoryTest.cpp
+    system/HomedirTest.cpp
 )
 
 add_executable(${PROJECT_NAME} ${SOURCES})

test/cpp-utils/system/HomedirTest.cpp

@@ -0,0 +1,71 @@
+#include <gtest/gtest.h>
+#include <cpp-utils/system/homedir.h>
+#include <cpp-utils/tempfile/TempDir.h>
+
+using cpputils::system::HomeDirectory;
+using cpputils::system::FakeHomeDirectoryRAII;
+using cpputils::system::FakeTempHomeDirectoryRAII;
+using cpputils::TempDir;
+
+namespace bf = boost::filesystem;
+
+TEST(HomedirTest, HomedirExists) {
+    EXPECT_TRUE(bf::exists(HomeDirectory::get()));
+}
+
+TEST(HomedirTest, AppDataDirExists) {
+    EXPECT_TRUE(bf::exists(HomeDirectory::getXDGDataDir()));
+}
+
+TEST(HomedirTest, FakeHomeDirectorySetsHomedirCorrectly) {
+    TempDir fakeHomeDir, fakeAppDataDir;
+    FakeHomeDirectoryRAII a(fakeHomeDir.path(), fakeAppDataDir.path());
+
+    EXPECT_EQ(fakeHomeDir.path(), HomeDirectory::get());
+    EXPECT_EQ(fakeAppDataDir.path(), HomeDirectory::getXDGDataDir());
+}
+
+TEST(HomedirTest, FakeHomeDirectoryResetsHomedirCorrectly) {
+    bf::path actualHomeDir = HomeDirectory::get();
+    bf::path actualAppDataDir = HomeDirectory::getXDGDataDir();
+
+    {
+        TempDir fakeHomeDir, fakeAppDataDir;
+        FakeHomeDirectoryRAII a(fakeHomeDir.path(), fakeAppDataDir.path());
+
+        EXPECT_NE(actualHomeDir, HomeDirectory::get());
+        EXPECT_NE(actualAppDataDir, HomeDirectory::getXDGDataDir());
+    }
+    EXPECT_EQ(actualHomeDir, HomeDirectory::get());
+    EXPECT_EQ(actualAppDataDir, HomeDirectory::getXDGDataDir());
+}
+
+TEST(HomedirTest, FakeTempHomeDirectorySetsHomedirCorrectly) {
+    bf::path actualHomeDir = HomeDirectory::get();
+    bf::path actualAppDataDir = HomeDirectory::getXDGDataDir();
+
+    FakeTempHomeDirectoryRAII a;
+
+    EXPECT_NE(actualHomeDir, HomeDirectory::get());
+    EXPECT_NE(actualAppDataDir, HomeDirectory::getXDGDataDir());
+}
+
+TEST(HomedirTest, FakeTempHomeDirectoryResetsHomedirCorrectly) {
+    bf::path actualHomeDir = HomeDirectory::get();
+    bf::path actualAppDataDir = HomeDirectory::getXDGDataDir();
+
+    {
+        FakeTempHomeDirectoryRAII a;
+
+        EXPECT_NE(actualHomeDir, HomeDirectory::get());
+        EXPECT_NE(actualAppDataDir, HomeDirectory::getXDGDataDir());
+    }
+    EXPECT_EQ(actualHomeDir, HomeDirectory::get());
+    EXPECT_EQ(actualAppDataDir, HomeDirectory::getXDGDataDir());
+}
+
+TEST(HomedirTest, FakeTempHomeDirectoryUsesDifferentDirsForHomedirAndAppdataDir) {
+    FakeTempHomeDirectoryRAII a;
+
+    EXPECT_NE(HomeDirectory::get(), HomeDirectory::getXDGDataDir());
+}

test/cryfs/testutils/TestWithFakeHomeDirectory.h

@@ -6,14 +6,8 @@
 #include <cpp-utils/system/homedir.h>
 
 class TestWithFakeHomeDirectory {
-public:
-    TestWithFakeHomeDirectory()
-        :homedir(), fakeHomeDirRAII(homedir.path()) {
-    }
-
 private:
-    cpputils::TempDir homedir;
-    cpputils::system::FakeHomeDirectoryRAII fakeHomeDirRAII;
+    cpputils::system::FakeTempHomeDirectoryRAII fakeHomeDirRAII;
 };
 
 #endif