project(
  'bubblewrap',
  'c',
  version : '0.11.2',
  meson_version : '>=0.49.0',
  default_options : [
    'warning_level=2',
  ],
)

cc = meson.get_compiler('c')
add_project_arguments('-D_GNU_SOURCE', language : 'c')
common_include_directories = include_directories('.')

# Keep this in sync with ostree, except remove -Wall (part of Meson
# warning_level 2) and -Werror=declaration-after-statement
add_project_arguments(
  cc.get_supported_arguments([
    '-Werror=shadow',
    '-Werror=empty-body',
    '-Werror=strict-prototypes',
    '-Werror=missing-prototypes',
    '-Werror=implicit-function-declaration',
    '-Werror=pointer-arith',
    '-Werror=init-self',
    '-Werror=missing-declarations',
    '-Werror=return-type',
    '-Werror=overflow',
    '-Werror=int-conversion',
    '-Werror=parenthesis',
    '-Werror=incompatible-pointer-types',
    '-Werror=misleading-indentation',
    '-Werror=missing-include-dirs',
    '-Werror=aggregate-return',

    # Extra warnings specific to bubblewrap
    '-Werror=switch-default',
    '-Wswitch-enum',

    # Deliberately not warning about these, ability to zero-initialize
    # a struct is a feature
    '-Wno-missing-field-initializers',
    '-Wno-error=missing-field-initializers',
  ]),
  language : 'c',
)

if (
  cc.has_argument('-Werror=format=2')
  and cc.has_argument('-Werror=format-security')
  and cc.has_argument('-Werror=format-nonliteral')
)
  add_project_arguments([
    '-Werror=format=2',
    '-Werror=format-security',
    '-Werror=format-nonliteral',
  ], language : 'c')
endif

bash = find_program('bash', required : false)

if get_option('python') == ''
  python = find_program('python3')
else
  python = find_program(get_option('python'))
endif

libcap_dep = dependency('libcap', required : true)

selinux_dep = dependency(
  'libselinux',
  version : '>=2.1.9',
  # if disabled, Meson will behave as though libselinux was not found
  required : get_option('selinux'),
)

cdata = configuration_data()
cdata.set_quoted(
  'PACKAGE_STRING',
  '@0@ @1@'.format(meson.project_name(), meson.project_version()),
)

if selinux_dep.found()
  cdata.set('HAVE_SELINUX', 1)
  if selinux_dep.version().version_compare('>=2.3')
    cdata.set('HAVE_SELINUX_2_3', 1)
  endif
endif

if get_option('require_userns')
  cdata.set('ENABLE_REQUIRE_USERNS', 1)
endif

if get_option('support_setuid')
  cdata.set('ENABLE_SUPPORT_SETUID', 1)
  warning('running bubblewrap setuid is deprecated and risky. Most recent operating systems support unprivileged user namespaces and we recommend using that. Support for this will be removed in the next version.')
endif

configure_file(
  output : 'config.h',
  configuration : cdata,
)

if meson.is_subproject() and get_option('program_prefix') == ''
  error('program_prefix option must be set when bwrap is a subproject')
endif

if get_option('bwrapdir') != ''
  bwrapdir = get_option('bwrapdir')
elif meson.is_subproject()
  bwrapdir = get_option('libexecdir')
else
  bwrapdir = get_option('bindir')
endif

bwrap = executable(
  get_option('program_prefix') + 'bwrap',
  [
    'bubblewrap.c',
    'bind-mount.c',
    'network.c',
    'utils.c',
  ],
  build_rpath : get_option('build_rpath'),
  install : true,
  install_dir : bwrapdir,
  install_rpath : get_option('install_rpath'),
  dependencies : [selinux_dep, libcap_dep],
)

manpages_xsl = 'http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl'
xsltproc = find_program('xsltproc', required : get_option('man'))
build_man_page = false

if xsltproc.found() and not meson.is_subproject()
  if run_command([
    xsltproc, '--nonet', manpages_xsl,
  ], check : false).returncode() == 0
    message('Docbook XSL found, man page enabled')
    build_man_page = true
  elif get_option('man').enabled()
    error('Man page requested, but Docbook XSL stylesheets not found')
  else
    message('Docbook XSL not found, man page disabled automatically')
  endif
endif

if build_man_page
  custom_target(
    'bwrap.1',
    output : 'bwrap.1',
    input : 'bwrap.xml',
    command : [
      xsltproc,
      '--nonet',
      '--stringparam', 'man.output.quietly', '1',
      '--stringparam', 'funcsynopsis.style', 'ansi',
      '--stringparam', 'man.th.extra1.suppress', '1',
      '--stringparam', 'man.authors.section.enabled', '0',
      '--stringparam', 'man.copyright.section.enabled', '0',
      '-o', '@OUTPUT@',
      manpages_xsl,
      '@INPUT@',
    ],
    install : true,
    install_dir : get_option('mandir') / 'man1',
  )
endif

if not meson.is_subproject()
  subdir('completions')
endif

if get_option('tests')
  subdir('tests')
endif