Add ClangFormat rules

cmake/CLangFormat.cmake

@@ -0,0 +1,59 @@
+#  Copyright (C) 2017 KeePassXC Team <team@keepassxc.org>
+#
+#  This program is free software: you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation, either version 2 or (at your option)
+#  version 3 of the License.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+set(EXCLUDED_DIRS
+    # third-party directories
+    zxcvbn/
+    http/qhttp/
+    streams/QtIOCompressor
+    # objective-c directories
+    autotype/mac
+)
+
+set(EXCLUDED_FILES
+    # third-party files
+    streams/qtiocompressor.cpp
+    streams/qtiocompressor.h
+    gui/KMessageWidget.h
+    gui/KMessageWidget.cpp
+    tests/modeltest.cpp
+    tests/modeltest.h
+    # objective-c files
+    core/ScreenLockListenerMac.h
+    core/ScreenLockListenerMac.cpp
+)
+
+file(GLOB_RECURSE ALL_SOURCE_FILES *.cpp *.h)
+foreach (SOURCE_FILE ${ALL_SOURCE_FILES})
+    foreach (EXCLUDED_DIR ${EXCLUDED_DIRS})
+        string(FIND ${SOURCE_FILE} ${EXCLUDED_DIR} SOURCE_FILE_EXCLUDED)
+        if (NOT ${SOURCE_FILE_EXCLUDED} EQUAL -1)
+            list(REMOVE_ITEM ALL_SOURCE_FILES ${SOURCE_FILE})
+        endif ()
+    endforeach ()
+    foreach (EXCLUDED_FILE ${EXCLUDED_FILES})
+        if (${SOURCE_FILE} MATCHES ".*${EXCLUDED_FILE}$")
+            list(REMOVE_ITEM ALL_SOURCE_FILES ${SOURCE_FILE})
+        endif ()
+    endforeach ()
+endforeach ()
+
+add_custom_target(
+        format
+        COMMAND clang-format
+        -style=file
+        -i
+        ${ALL_SOURCE_FILES}
+)