# Check the CMake source tree and report anything suspicious...
#
message("=============================================================================")
message("CTEST_FULL_OUTPUT (Avoid ctest truncation of output)")
message("")
message("CMake_BINARY_DIR='${CMake_BINARY_DIR}'")
message("CMake_SOURCE_DIR='${CMake_SOURCE_DIR}'")
message("CVS_EXECUTABLE='${CVS_EXECUTABLE}'")
message("ENV{DASHBOARD_TEST_FROM_CTEST}='$ENV{DASHBOARD_TEST_FROM_CTEST}'")
message("")


# Is the build directory the same as or underneath the source directory?
# (i.e. - is it an "in source" build?)
#
set(in_source_build 0)

if(CMake_SOURCE_DIR STREQUAL "${CMake_BINARY_DIR}")
  message("build dir *is* source dir")
  set(in_source_build 1)
else()
  string(LENGTH "${CMake_SOURCE_DIR}" src_len)
  string(LENGTH "${CMake_BINARY_DIR}" bin_len)

  if(bin_len GREATER src_len)
    math(EXPR substr_len "${src_len}+1")
    string(SUBSTRING "${CMake_BINARY_DIR}" 0 ${substr_len} bin_dir)
    if(bin_dir STREQUAL "${CMake_SOURCE_DIR}/")
      message("build dir is under source dir")
      set(in_source_build 1)
    endif()
  endif()
endif()

message("src_len='${src_len}'")
message("bin_len='${bin_len}'")
message("substr_len='${substr_len}'")
message("bin_dir='${bin_dir}'")
message("in_source_build='${in_source_build}'")
message("")


# Check with "cvs -q -n up -dP" if there are any local modifications to the
# CMake source tree:
#
message("=============================================================================")
message("Copy/paste this command to reproduce:")
message("cd \"${CMake_SOURCE_DIR}\" && \"${CVS_EXECUTABLE}\" -q -n up -dP")
message("")
execute_process(COMMAND ${CVS_EXECUTABLE} -q -n up -dP
  WORKING_DIRECTORY ${CMake_SOURCE_DIR}
  OUTPUT_VARIABLE ov
  ERROR_VARIABLE ev
  RESULT_VARIABLE rv)

message("Results of running '${CVS_EXECUTABLE} -q -n up -dP'")
message("rv='${rv}'")
message("ov='${ov}'")
message("ev='${ev}'")
message("")

# Analyze cvs output:
#
set(additions 0)
set(conflicts 0)
set(modifications 0)
set(nonadditions 0)

if(NOT ov STREQUAL "")
  string(REPLACE ";" "\\\\;" lines "${ov}")
  string(REPLACE "\n" "E;" lines "${lines}")

  foreach(line ${lines})
    message("'${line}'")

    # But do not consider files that exist just because some user poked around
    # the file system with Windows Explorer or with the Finder from a Mac...
    # ('Thumbs.db' and '.DS_Store' files...)
    #
    set(consider 1)
    set(ignore_files_regex "^(. |.*(/|\\\\))(\\.DS_Store|Thumbs.db)E$")
    if(line MATCHES "${ignore_files_regex}")
      message("   line matches '${ignore_files_regex}' -- not considered")
      set(consider 0)
    endif()

    if(consider)
      if(line MATCHES "^A ")
        message("   locally added file/directory detected...")
        set(additions 1)
      endif()

      if(line MATCHES "^C ")
        message("   conflict detected...")
        set(conflicts 1)
      endif()

      if(line MATCHES "^M ")
        message("   locally modified file detected...")
        set(modifications 1)
      endif()

      if(line MATCHES "^\\? ")
        message("   locally non-added file/directory detected...")
        set(nonadditions 1)
      endif()
    endif()
  endforeach()
endif()

message("=============================================================================")
message("additions='${additions}'")
message("conflicts='${conflicts}'")
message("modifications='${modifications}'")
message("nonadditions='${nonadditions}'")
message("")


# Decide if the test passes or fails:
#
message("=============================================================================")

if("$ENV{DASHBOARD_TEST_FROM_CTEST}" STREQUAL "")

  # developers are allowed to have local additions and modifications...
  set(is_dashboard 0)
  message("interactive test run")
  message("")

else()

  set(is_dashboard 1)
  message("dashboard test run")
  message("")

  # but dashboard machines are not allowed to have local additions or modifications...
  if(additions)
    message(FATAL_ERROR "test fails: local source tree additions")
  endif()

  if(modifications)
    message(FATAL_ERROR "test fails: local source tree modifications")
  endif()

  #
  # It's a dashboard run if ctest was run with '-D ExperimentalTest' or some
  # other -D arg on its command line or if ctest is running a -S script to run
  # a dashboard... Running ctest like that sets the DASHBOARD_TEST_FROM_CTEST
  # env var.
  #

endif()


# ...and nobody is allowed to have local non-additions or conflicts...
# Not even developers.
#
if(nonadditions)
  if(in_source_build AND is_dashboard)
    message("
warning: test results confounded because this is an 'in-source' build - cannot
distinguish between non-added files that are in-source build products and
non-added source files that somebody forgot to 'cvs add'... - this is only ok
if this is intentionally an in-source dashboard build... Developers should
use out-of-source builds to verify a clean source tree with this test...

Allowing test to pass despite the warning message...
")
  else()
    message(FATAL_ERROR "test fails: local source tree non-additions: use cvs add before committing, or remove the files from the source tree")
  endif()
endif()

if(conflicts)
  message(FATAL_ERROR "test fails: local source tree conflicts: resolve before committing")
endif()


# Still here? Good then...
#
message("test passes")
message("")
