Don't use env vars for configuration time options

- As a general rule of thumb one shouldn't use environment variables
  for setting configuration options for CMake. The reason for this is
  we don't know when CMake will be executed and re-evaluate that variable.
- e.g. If we run cmake a first time with a var set, and then run make on
  a second session (with no var) and cmake is called because a
  dependency changed, the option would be disabled
- This commit removes the use of environment vars from
  src/nvim/CMakeLists.txt entirely
- Removed SKIP_UNITTEST since it could only be used to remove a target
  at configuration time (and the target was optional anyway)
- Turned SANITIZE into an option, clang-asan.sh now passes cmake
  -DSANITIZE=ON
- Removed SKIP_EXEC since it was disabling a target at configuration time
  (not being used)

.ci/clang-asan.sh

@@ -25,18 +25,16 @@ symbolizer=/usr/local/clang-$clang_version/bin/llvm-symbolizer
 
 setup_prebuilt_deps x64
 
-export SANITIZE=1
 export ASAN_SYMBOLIZER_PATH=$symbolizer
 export ASAN_OPTIONS="detect_leaks=1:log_path=$tmpdir/asan"
 export TSAN_OPTIONS="external_symbolizer_path=$symbolizer:log_path=$tmpdir/tsan"
 
-export SKIP_UNITTEST=1
 export UBSAN_OPTIONS="log_path=$tmpdir/ubsan" # not sure if this works
 
 CMAKE_EXTRA_FLAGS="-DTRAVIS_CI_BUILD=ON -DUSE_GCOV=ON"
 
 # Build and output version info.
-$MAKE_CMD CMAKE_EXTRA_FLAGS="$CMAKE_EXTRA_FLAGS" nvim
+$MAKE_CMD CMAKE_EXTRA_FLAGS="$CMAKE_EXTRA_FLAGS -DSANITIZE=ON" nvim
 build/bin/nvim --version
 
 # Run functional tests.

src/nvim/CMakeLists.txt

@@ -94,8 +94,9 @@ endforeach()
 set_source_files_properties(
   ${CONV_SOURCES} PROPERTIES COMPILE_FLAGS "${COMPILE_FLAGS} -Wno-conversion")
 
+option(SANITIZE "Enable sanitizers when using Clang" OFF)
 if(CMAKE_C_COMPILER_ID MATCHES "Clang")
-  if(DEFINED ENV{SANITIZE})
+  if(SANITIZE)
     message(STATUS "Enabling the sanitizers")
     add_definitions(-DEXITFREE) # is this necessary for LeakSanitizer?
     add_definitions(-fno-sanitize-recover -fno-omit-frame-pointer
@@ -200,17 +201,13 @@ list(APPEND NVIM_LINK_LIBRARIES
     m
     ${CMAKE_THREAD_LIBS_INIT})
 
-if(NOT DEFINED ENV{SKIP_EXEC})
-  add_executable(nvim ${NEOVIM_GENERATED_SOURCES} ${NEOVIM_SOURCES}
-    ${NEOVIM_HEADERS})
-  target_link_libraries(nvim ${NVIM_LINK_LIBRARIES})
-  install_helper(TARGETS nvim)
-endif()
+add_executable(nvim ${NEOVIM_GENERATED_SOURCES} ${NEOVIM_SOURCES}
+  ${NEOVIM_HEADERS})
+target_link_libraries(nvim ${NVIM_LINK_LIBRARIES})
+install_helper(TARGETS nvim)
 
-if(NOT DEFINED ENV{SKIP_UNITTEST})
-  add_library(nvim-test MODULE EXCLUDE_FROM_ALL ${NEOVIM_GENERATED_SOURCES}
+add_library(nvim-test MODULE EXCLUDE_FROM_ALL ${NEOVIM_GENERATED_SOURCES}
     ${NEOVIM_SOURCES} ${NEOVIM_HEADERS})
-  target_link_libraries(nvim-test ${NVIM_LINK_LIBRARIES})
-endif()
+target_link_libraries(nvim-test ${NVIM_LINK_LIBRARIES})
 
 add_subdirectory(po)

src/nvim/po/CMakeLists.txt

@@ -2,8 +2,7 @@ find_package(Gettext)
 find_program(XGETTEXT_PRG xgettext)
 find_program(ICONV_PRG iconv)
 
-if(HAVE_WORKING_LIBINTL AND GETTEXT_FOUND AND XGETTEXT_PRG AND ICONV_PRG AND
-    NOT DEFINED ENV{SKIP_EXEC})
+if(HAVE_WORKING_LIBINTL AND GETTEXT_FOUND AND XGETTEXT_PRG AND ICONV_PRG)
   set(ENV{OLD_PO_FILE_INPUT} yes)
   set(ENV{OLD_PO_FILE_OUTPUT} yes)