Merge branch 'master' into chem_snap

include(Testing)

include(CodeCoverage)

include(CodingStandard)

###############################################################################

# Print package summary

if(CMAKE_VERSION VERSION_LESS 3.12)

    find_package(PythonInterp 3.5 QUIET) # Deprecated since version 3.12

    if(PYTHONINTERP_FOUND)

        set(Python3_EXECUTABLE ${PYTHON_EXECUTABLE})

        set(Python3_VERSION ${PYTHON_VERSION_STRING})

    endif()

else()

    find_package(Python3 COMPONENTS Interpreter QUIET)

endif()

if (Python3_EXECUTABLE)

    if(Python3_VERSION VERSION_GREATER_EQUAL 3.5)

        add_custom_target(

          check-whitespace

          ${Python3_EXECUTABLE} ${LAMMPS_TOOLS_DIR}/coding_standard/whitespace.py .

          WORKING_DIRECTORY  ${LAMMPS_DIR}

          COMMENT "Check for whitespace errors")

        add_custom_target(

          check-permissions

          ${Python3_EXECUTABLE} ${LAMMPS_TOOLS_DIR}/coding_standard/permissions.py .

          WORKING_DIRECTORY  ${LAMMPS_DIR}

          COMMENT "Check for permission errors")

        add_custom_target(

          fix-whitespace

          ${Python3_EXECUTABLE} ${LAMMPS_TOOLS_DIR}/coding_standard/whitespace.py -f .

          WORKING_DIRECTORY  ${LAMMPS_DIR}

          COMMENT "Fix whitespace errors")

        add_custom_target(

          fix-permissions

          ${Python3_EXECUTABLE} ${LAMMPS_TOOLS_DIR}/coding_standard/permissions.py -f .

          WORKING_DIRECTORY  ${LAMMPS_DIR}

          COMMENT "Fix permission errors")

    endif()

endif()

# Find clang-format

find_program(ClangFormat_EXECUTABLE NAMES clang-format

                                          clang-format-10.0

                                          clang-format-9.0

                                          clang-format-8.0

                                          clang-format-7.0

                                          clang-format-6.0

                                     DOC "clang-format executable")

mark_as_advanced(ClangFormat_EXECUTABLE)

if(ClangFormat_EXECUTABLE)

  # find version

  execute_process(COMMAND ${ClangFormat_EXECUTABLE} --version

                  OUTPUT_VARIABLE clang_format_version

                  ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)

  if(clang_format_version MATCHES "^clang-format version .*")

    # Arch Linux

    # clang-format version 10.0.0

    # Ubuntu 18.04 LTS Output

    # clang-format version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)

    string(REGEX REPLACE "clang-format version ([0-9.]+).*"

                         "\\1"

                         ClangFormat_VERSION

                         "${clang_format_version}")

  elseif(clang_format_version MATCHES ".*LLVM version .*")

    # CentOS 7 Output

    # LLVM (http://llvm.org/):

    #   LLVM version 3.4.2

    #   Optimized build.

    #   Built Nov  1 2018 (15:06:24).

    #   Default target: x86_64-redhat-linux-gnu

    #   Host CPU: x86-64

    string(REGEX REPLACE ".*LLVM version ([0-9.]+).*"

                         "\\1"

                         ClangFormat_VERSION

                         "${clang_format_version}")

  else()

    set(ClangFormat_VERSION "0.0")

  endif()

endif()

include(FindPackageHandleStandardArgs)

find_package_handle_standard_args(ClangFormat REQUIRED_VARS ClangFormat_EXECUTABLE VERSION_VAR ClangFormat_VERSION)

.TH LAMMPS "2 June 2020" "2020-06-02"

.TH LAMMPS "15 June 2020" "2020-06-15"

.SH NAME

.B LAMMPS

\- Molecular Dynamics Simulator.