build: Add meson build system

Reuse the generated dbus interface .xml files from fprintd to avoid
unnecessary copies.

meson.build

@@ -0,0 +1,159 @@
+project('fprintd', 'c',
+    version: '1.90.0',
+    license: 'GPLv2+',
+    default_options: [
+        'buildtype=debugoptimized',
+        'warning_level=1',
+        'c_std=gnu99',
+    ],
+    meson_version: '>= 0.50.0')
+
+gnome = import('gnome')
+i18n = import('i18n')
+
+cc = meson.get_compiler('c')
+host_system = host_machine.system()
+glib_min_version = '2.56'
+libfprint_min_version = '1.90.0'
+
+fprintd_installdir = get_option('prefix') / get_option('libexecdir')
+fprintd_plugindir = get_option('prefix') / get_option('libdir') / meson.project_name() / 'modules'
+storage_path = get_option('prefix') / get_option('localstatedir') / 'lib/fprint'
+localedir = get_option('prefix') / get_option('localedir')
+datadir = get_option('prefix') / get_option('datadir')
+sysconfdir = get_option('sysconfdir')
+if get_option('prefix') != '/usr'
+    sysconfdir = get_option('prefix') / sysconfdir
+endif
+
+common_cflags = cc.get_supported_arguments([
+    '-fno-strict-aliasing',
+    '-Wall',
+    '-Wcast-align',
+    '-Werror=address',
+    '-Werror=array-bounds',
+    '-Werror=empty-body',
+    '-Werror=implicit',
+    '-Werror=init-self',
+    '-Werror=int-to-pointer-cast',
+    '-Werror=main',
+    '-Werror=missing-braces',
+    '-Werror=nonnull',
+    '-Werror=pointer-to-int-cast',
+    '-Werror=return-type',
+    '-Werror=sequence-point',
+    '-Werror=trigraphs',
+    '-Werror=write-strings',
+    '-Wformat-nonliteral',
+    '-Wformat-security',
+    '-Wformat=2',
+    '-Wignored-qualifiers',
+    '-Wimplicit-function-declaration',
+    '-Wlogical-op',
+    '-Wmissing-declarations',
+    '-Wmissing-format-attribute',
+    '-Wmissing-include-dirs',
+    '-Wmissing-noreturn',
+    '-Wmissing-prototypes',
+    '-Wnested-externs',
+    '-Wold-style-definition',
+    '-Wpointer-arith',
+    '-Wshadow',
+    '-Wstrict-prototypes',
+    '-Wtype-limits',
+    '-Wundef',
+    '-Wunused',
+])
+add_project_arguments(common_cflags, language: 'c')
+
+# Dependencies
+glib_dep = dependency('glib-2.0', version: '>=' + glib_min_version)
+gio_dep = dependency('gio-2.0', version: '>=' + glib_min_version)
+gmodule_dep = dependency('gmodule-2.0', version: '>=' + glib_min_version)
+libfprint_dep = dependency('libfprint-2', version: '>=' + libfprint_min_version)
+polkit_gobject_dep = dependency('polkit-gobject-1', version: '>= 0.91')
+dbus_dep = dependency('dbus-1', required: false)
+dbus_glib_dep = dependency('dbus-glib-1')
+libsystemd_dep = dependency('libsystemd', required: get_option('pam'))
+pam_dep = cc.find_library('pam',
+    required: get_option('pam'),
+    has_headers: 'security/pam_modules.h',
+)
+
+pod2man = find_program('pod2man', required: get_option('man'))
+xsltproc = find_program('xsltproc', required: get_option('gtk_doc'))
+
+# StateDirectory was introduced in systemd 235
+systemd_dep = dependency('systemd', version: '>= 235')
+systemd_unit_dir = get_option('systemd_system_unit_dir')
+
+if systemd_unit_dir == ''
+    systemd_unit_dir = systemd_dep.get_pkgconfig_variable('systemdsystemunitdir')
+endif
+
+dbus_service_dir = get_option('dbus_service_dir')
+dbus_data_dir = datadir
+dbus_interfaces_dir = ''
+
+if dbus_dep.found()
+    if dbus_service_dir == ''
+        dbus_service_dir = dbus_dep.get_pkgconfig_variable('system_bus_services_dir')
+    endif
+    dbus_interfaces_dir = dbus_dep.get_pkgconfig_variable('interfaces_dir')
+    dbus_data_dir = dbus_dep.get_pkgconfig_variable('datadir')
+endif
+
+dbus_conf_dir = dbus_data_dir / 'dbus-1/system.d'
+
+if dbus_service_dir == ''
+    dbus_service_dir = datadir / 'dbus-1/system-services'
+endif
+if dbus_interfaces_dir == ''
+    dbus_interfaces_dir = datadir / 'dbus-1/interfaces'
+endif
+
+polkit_policy_directory = polkit_gobject_dep.get_pkgconfig_variable('policydir')
+
+# Tests dependencies
+pam_wrapper_dep = dependency('pam_wrapper', required: get_option('pam'))
+
+xmllint = find_program('xmllint', required: false)
+python3 = find_program('python3') # No meson without it!
+python3_test_modules = {
+    'cairo': true,
+    'dbus': true,
+    'dbusmock': true,
+    'gi': true,
+    'pypamtest': get_option('pam'),
+}
+python3_available_modules = []
+
+foreach module, required : python3_test_modules
+    if required and run_command(python3, '-c', 'import @0@'.format(module)).returncode() != 0
+        error('Python3 module \'' + module + '\' required by test suite not found')
+    endif
+endforeach
+
+cdata = configuration_data()
+cdata.set_quoted('GETTEXT_PACKAGE', meson.project_name())
+cdata.set_quoted('PACKAGE_VERSION', meson.project_version())
+cdata.set_quoted('VERSION', meson.project_version())
+cdata.set_quoted('SYSCONFDIR', sysconfdir)
+
+config_h = configure_file(
+  input: 'config.h.meson',
+  output: 'config.h',
+  configuration: cdata
+)
+
+subdir('src')
+subdir('data')
+subdir('utils')
+if get_option('pam')
+    subdir('pam')
+endif
+if get_option('gtk_doc')
+    subdir('doc')
+endif
+subdir('tests')
+subdir('po')