bug#37551: [PATCH]: Update privacy usage descriptions for macOS 10.15 Catalina (nextstep)

[Artyom Loenko]

Hello there,

Apple has updated requirements related to privacy on macOS Catalina. Now we 
have to specify usage descriptions for the following items to be able to access 
these folders and volumes:

- NSDesktopFolderUsageDescription;
- NSDocumentsFolderUsageDescription;
- NSDownloadsFolderUsageDescription;
- NSRemovableVolumesUsageDescription.

(https://developer.apple.com/documentation/bundleresources/information_property_list/)

Otherwise, it is impossible to work with files in these folders (especially, 
when Desktop and Documents are synchronised with iCloud). Full Disk Access 
permission does not help in this case. The only workaround right now is to run 
Emacs from Terminal.app to inherit Terminal.app permissions.

P.S. There is a simple script that simulates the same behaviour if you want to 
check how it works: 
https://gist.github.com/dive/f64c645a9086afce8e5dd2590071dbf9

This is a simple patch to fix it (these changes are backwards compatible, and 
previous macOS versions ignore these values.):

—————

 nextstep/templates/Info.plist.in | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/nextstep/templates/Info.plist.in b/nextstep/templates/Info.plist.in
index c1e50a8409..70f641cc99 100644
--- a/nextstep/templates/Info.plist.in
+++ b/nextstep/templates/Info.plist.in
@@ -677,5 +677,13 @@ along with GNU Emacs.  If not, see 
<https://www.gnu.org/licenses/>.
        <string>YES</string>
         <key>NSAppleEventsUsageDescription</key>
         <string>Emacs requires permission to send AppleEvents to other 
applications.</string>
+       <key>NSDesktopFolderUsageDescription</key>
+       <string>Emacs requires permission to access the Desktop folder.</string>
+       <key>NSDocumentsFolderUsageDescription</key>
+       <string>Emacs requires permission to access the Documents 
folder.</string>
+       <key>NSDownloadsFolderUsageDescription</key>
+       <string>Emacs requires permission to access the Downloads 
folder.</string>
+       <key>NSRemovableVolumesUsageDescription</key>
+       <string>Emacs requires permission to access files on Removable 
Volumes.</string>
 </dict>
 </plist>

—————

--
Artem