Fix meson deprecations (#107)

README.md

@@ -11,7 +11,7 @@ You'll need the following dependencies:
     libgranite-dev
     libgtk-3-dev
     libwingpanel-dev
-    meson
+    meson >= 0.58.0
     valac
 
 Run `meson` to configure the build environment and then `ninja` to build

meson.build

@@ -1,15 +1,16 @@
 project(
     'nightlight',
     'vala', 'c',
-    version: '2.1.3'
+    version: '2.1.3',
+    meson_version: '>= 0.58.0'
 )
 
 gettext_name = meson.project_name() + '-indicator'
 gnome = import('gnome')
 i18n = import('i18n')
 
 prefix = get_option('prefix')
-libdir = join_paths(prefix, get_option('libdir'))
+libdir = prefix / get_option('libdir')
 
 add_global_arguments('-DGETTEXT_PACKAGE="@0@"'.format(gettext_name), language:'c')
 add_project_arguments('-DG_LOG_DOMAIN="io.elementary.wingpanel.nightlight"', language:'c')
@@ -21,10 +22,10 @@ gresource = gnome.compile_resources(
 )
 
 wingpanel_dep = dependency('wingpanel')
-wingpanel_indicatorsdir = wingpanel_dep.get_pkgconfig_variable('indicatorsdir', define_variable: ['libdir', libdir])
+wingpanel_indicatorsdir = wingpanel_dep.get_variable('indicatorsdir', pkgconfig_define: ['libdir', libdir])
 
 config_data = configuration_data()
-config_data.set_quoted('LOCALEDIR', join_paths(get_option('prefix'), get_option('localedir')))
+config_data.set_quoted('LOCALEDIR', prefix / get_option('localedir'))
 config_data.set_quoted('GETTEXT_PACKAGE', meson.project_name() + '-indicator')
 config_file = configure_file(
     input: 'src/Config.vala.in',

po/extra/meson.build

@@ -1,5 +1,5 @@
 i18n.gettext('extra',
-    args: '--directory=' + meson.source_root(),
+    args: '--directory=' + meson.project_source_root(),
     preset: 'glib',
     install: false,
 )

po/meson.build

@@ -1,5 +1,5 @@
 i18n.gettext(gettext_name,
-    args: '--directory=' + meson.source_root(),
+    args: '--directory=' + meson.project_source_root(),
     preset: 'glib'
 )