gnome: add support for update-mime-database

Fixes #10865

Author: Paolo Borelli

docs/markdown/Gnome-module.md

@@ -415,3 +415,5 @@ It takes the following keyword arguments:
   `<prefix>/<datadir>/icons/hicolor`.
 - `update_desktop_database`: *Since 0.59.0* If set to `true`, update cache of
   MIME types handled by desktop files in `<prefix>/<datadir>/applications`.
+- `update_mime_database`: *Since 0.64.0* If set to `true`, update cache of
+  MIME types in `<prefix>/<datadir>/mime`.

docs/markdown/snippets/gnome_update_mime_database.md

@@ -0,0 +1,5 @@
+## Added `update_mime_database` to `gnome.post_install()`
+
+Applications that install a `.xml` file containing a `mime-type` need to update
+the cache upon installation. Most applications do that using a custom script,
+but it can now be done by Meson directly.

mesonbuild/modules/gnome.py

@@ -58,6 +58,7 @@ class PostInstall(TypedDict):
         gio_querymodules: T.List[str]
         gtk_update_icon_cache: bool
         update_desktop_database: bool
+        update_mime_database: bool
 
     class CompileSchemas(TypedDict):
 
@@ -282,6 +283,7 @@ def __init__(self, interpreter: 'Interpreter') -> None:
         self.install_gio_querymodules: T.List[str] = []
         self.install_gtk_update_icon_cache = False
         self.install_update_desktop_database = False
+        self.install_update_mime_database = False
         self.devenv: T.Optional[build.EnvironmentVariables] = None
         self.native_glib_version: T.Optional[str] = None
         self.methods.update({
@@ -332,6 +334,7 @@ def _print_gdbus_warning() -> None:
         KwargInfo('gio_querymodules', ContainerTypeInfo(list, str), default=[], listify=True),
         KwargInfo('gtk_update_icon_cache', bool, default=False),
         KwargInfo('update_desktop_database', bool, default=False, since='0.59.0'),
+        KwargInfo('update_mime_database', bool, default=False, since='0.64.0'),
     )
     @noPosargs
     @FeatureNew('gnome.post_install', '0.57.0')
@@ -370,6 +373,13 @@ def post_install(self, state: 'ModuleState', args: T.List['TYPE_var'], kwargs: '
             script = state.backend.get_executable_serialisation([prog, '-q', appdir])
             script.skip_if_destdir = True
             rv.append(script)
+        if kwargs['update_mime_database'] and not self.install_update_mime_database:
+            self.install_update_mime_database = True
+            prog = state.find_program('update-mime-database')
+            appdir = os.path.join(datadir_abs, 'mime')
+            script = state.backend.get_executable_serialisation([prog, appdir])
+            script.skip_if_destdir = True
+            rv.append(script)
         return ModuleReturnValue(None, rv)
 
     @typed_pos_args('gnome.compile_resources', str, (str, mesonlib.File, build.CustomTarget, build.CustomTargetIndex, build.GeneratedList))