Remove deprecated functions in meson files

Author: stsdc

data/meson.build

@@ -32,7 +32,7 @@ install_data(
 i18n.merge_file(
     input: 'monitor.desktop.in',
     output: meson.project_name() + '.desktop',
-    po_dir: meson.source_root() / 'po' / 'extra',
+    po_dir: meson.project_source_root() / 'po' / 'extra',
     type: 'desktop',
     install: true,
     install_dir: datadir / 'applications'
@@ -41,7 +41,7 @@ i18n.merge_file(
 i18n.merge_file(
     input: meson.project_name() + '.metainfo.xml.in',
     output: meson.project_name() + '.metainfo.xml',
-    po_dir: join_paths(meson.source_root(), 'po', 'extra'),
+    po_dir: meson.project_source_root() / 'po' / 'extra',
     install: true,
     install_dir: join_paths(datadir, 'metainfo')
 )

src/Indicator/meson.build

@@ -21,5 +21,5 @@ shared_module(
     icons_gresource,
     dependencies: indicator_dependencies,
     install: true,
-    install_dir : wingpanel_dep.get_pkgconfig_variable('indicatorsdir', define_variable: ['libdir', libdir]),
+    install_dir: wingpanel_dep.get_variable('indicatorsdir', pkgconfig_define: ['libdir', libdir])
 )

tests/meson.build

@@ -4,9 +4,9 @@ test_sources = files(run_command('list-src.sh', check: true).stdout().strip().sp
 test(
     'monitor-statusbar-test', 
     executable('monitor-statusbar-test', test_sources, [
-        meson.source_root() / 'src/Widgets/Statusbar/Statusbar.vala',
-        meson.source_root() / 'src/Resources/ResourcesSerialized.vala',
-        meson.source_root() / 'src/Utils.vala'
+        meson.project_source_root() / 'src/Widgets/Statusbar/Statusbar.vala',
+        meson.project_source_root() / 'src/Resources/ResourcesSerialized.vala',
+        meson.project_source_root() / 'src/Utils.vala'
     ],
     project_config,
     dependencies: app_dependencies),