[Bug 57205] MimeType values in .desktop files are not regexps

[Ian Jackson]

Public bug reported:

DesktopEntry.py says:
	def getMimeType(self):
		return self.get('MimeType', list=True, type="regex")

However, the MimeType field is not a regexp according to eg
http://standards.freedesktop.org/desktop-entry-spec/0.9.5/ar01s07.html

Callers will have to have been expecting to treat the result like a
compiled re (eg, by calling .match).  However, they are also entitled to
look inside and see re.pattern and some callers (eg, gnome-app-install)
know that there is this lack of quoting bug in pygtk

So there is no good answer to this.  Perhaps it would be best to invent
a getMimeTypeStringList and deprecate the old method.  There are some
cryptic comments in DesktopEntry.py relating to deprecation of MimeType.

To reproduce at least one of the symptoms:
 gnome-app-install --mime-type=text/vndXwapYwml
and observe that an XML editor is offered when in fact no application should be found.  Note that the fix should arrange that
 gnome-app-install
and then typing
 text/vnd.wap.wml
into the search box should still find the XML editor.

** Affects: pygtk (Ubuntu)
     Importance: Untriaged
         Status: Unconfirmed

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MimeType values in .desktop files are not regexps
https://launchpad.net/bugs/57205