build: Add with-appdata option

This is mostly useful to avoid a newer gettext dependency
for translating the appdata file but it is also just useless
data for some distros without any app store.

Closes #2219

data/misc/meson.build

@@ -3,6 +3,7 @@ metainfodir = join_paths(get_option('datadir'), 'metainfo')
 desktop_utils = find_program('desktop-file-validate', required: false)
 
 if get_option('with-gtk')
+  if get_option('with-appdata')
     hexchat_appdata = i18n.merge_file(
       input: 'io.github.Hexchat.appdata.xml.in',
       output: 'io.github.Hexchat.appdata.xml',
@@ -17,6 +18,7 @@ if get_option('with-gtk')
         args: ['validate-relax', hexchat_appdata]
       )
     endif
+  endif
 
   desktop_conf = configuration_data()
   if get_option('with-dbus')
@@ -68,7 +70,7 @@ if get_option('with-theme-manager')
   )
 endif
 
-if get_option('with-plugin')
+if get_option('with-plugin') and get_option('with-appdata')
   plugin_metainfo = []
 
   # FIXME: These should all get translated somewhere

meson_options.txt

@@ -28,6 +28,9 @@ option('with-theme-manager', type: 'boolean', value: false,
 option('dbus-service-use-appid', type: 'boolean', value: false,
   description: 'Rename dbus service to match app-id, required for Flatpak'
 )
+option('with-appdata', type: 'boolean',
+  description: 'Install appdata files for app stores'
+)
 
 # Plugins
 option('with-checksum', type: 'boolean',