Add 'clangformat' target to CMake

... to simplify use of clang-format for formatting
the sources, using ClangFormat.cmake module from
https://github.com/zemasoft/clangformat-cmake .

CMakeLists.txt

@@ -47,6 +47,7 @@ set(LIBRARY_OUTPUT_PATH ${EXECUTABLE_OUTPUT_PATH})
 enable_testing()
 
 include(GNUInstallDirs)
+include(ClangFormat)
 
 option(ADMC_BUILD_DEB "Build the deb package of ADMC." OFF)
 

README.md

@@ -19,6 +19,13 @@ $ make -j12
 
 If the build fails, check build output for missing dependencies.
 
+You can also format the sources by building `clangformat`
+target after `cmake` is run, for example:
+
+```
+make -C build clangformat
+```
+
 # Usage:
 
 This app requires a working Active Directory domain and for the client machine to be connected and logged into the domain. You can find articles about these topics on [ALTLinux wiki](https://www.altlinux.org/%D0%94%D0%BE%D0%BC%D0%B5%D0%BD).

cmake/ClangFormat.cmake

@@ -0,0 +1,52 @@
+# Copyright Tomas Zeman 2019-2020.
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+
+function(prefix_clangformat_setup prefix)
+  if(NOT CLANGFORMAT_EXECUTABLE)
+    set(CLANGFORMAT_EXECUTABLE clang-format)
+  endif()
+
+  if(NOT EXISTS ${CLANGFORMAT_EXECUTABLE})
+    find_program(clangformat_executable_tmp ${CLANGFORMAT_EXECUTABLE})
+    if(clangformat_executable_tmp)
+      set(CLANGFORMAT_EXECUTABLE ${clangformat_executable_tmp})
+      unset(clangformat_executable_tmp)
+    else()
+      message(FATAL_ERROR "ClangFormat: ${CLANGFORMAT_EXECUTABLE} not found! Aborting")
+    endif()
+  endif()
+
+  foreach(clangformat_source ${ARGN})
+    get_filename_component(clangformat_source ${clangformat_source} ABSOLUTE)
+    list(APPEND clangformat_sources ${clangformat_source})
+  endforeach()
+
+  add_custom_target(${prefix}_clangformat
+    COMMAND
+      ${CLANGFORMAT_EXECUTABLE}
+      -style=file
+      -i
+      ${clangformat_sources}
+    WORKING_DIRECTORY
+      ${CMAKE_SOURCE_DIR}
+    COMMENT
+      "Formatting ${prefix} with ${CLANGFORMAT_EXECUTABLE} ..."
+  )
+
+  if(TARGET clangformat)
+    add_dependencies(clangformat ${prefix}_clangformat)
+  else()
+    add_custom_target(clangformat DEPENDS ${prefix}_clangformat)
+  endif()
+endfunction()
+
+function(clangformat_setup)
+  prefix_clangformat_setup(${PROJECT_NAME} ${ARGN})
+endfunction()
+
+function(target_clangformat_setup target)
+  get_target_property(target_sources ${target} SOURCES)
+  prefix_clangformat_setup(${target} ${target_sources})
+endfunction()

src/adldap/CMakeLists.txt

@@ -22,7 +22,7 @@ configure_file("adldap_config.h.in" "adldap_config.h")
 set(CMAKE_AUTOMOC ON)
 set(CMAKE_AUTORCC ON)
 
-add_library(adldap SHARED
+set(ADLDAP_SOURCES
     ad_interface.cpp
     ad_config.cpp
     ad_utils.cpp
@@ -31,7 +31,11 @@ add_library(adldap SHARED
     ad_filter.cpp
     ad_security.cpp
     gplink.cpp
+)
+prefix_clangformat_setup(adldap ${ADLDAP_SOURCES})
 
+
+set(ADLDAP_SAMBA_SOURCES
     samba/gp_manage.c
     samba/ndr_security.c
     samba/dom_sid.c
@@ -39,7 +43,12 @@ add_library(adldap SHARED
     samba/ndr_misc.c
     samba/libsmb_xattr.c
     samba/security_descriptor.c
+)
 
+
+add_library(adldap SHARED
+    ${ADLDAP_SOURCES}
+    ${ADLDAP_SAMBA_SOURCES}
     adldap.qrc
 )
 

src/admc/CMakeLists.txt

@@ -192,6 +192,7 @@ add_executable(admc
     main.cpp
     ${ADMC_SOURCES}
 )
+target_clangformat_setup(admc)
 
 # NOTE: build admc as library to streamline building tests.
 # Tests just link to this lib and use all of admc's code.