[Bug 60095] PGN files detected as text/plain not application/x-chess-pgn

[Robert Ancell]

Public bug reported:

Nautilus does not correctly identify PGN (portable game notation) files.

To reproduce save the following as foo.pgn:
<snip>
[Event "Local chess game"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "White"]
[Black "Black"]
[Result "*"]

1. e4 d5 2. exd5 Na6 3. Bb5+ *
</snip>

Browsing with Nautilus will display a thumbnail of the text of the file
and right-clicking to get the file properties will show the MIME type as
text/plain.

However /usr/share/mime/packages/freedesktop.org.xml has an entry for .pgn files:
<snip>
  <mime-type type="application/x-chess-pgn">
    <comment>PGN chess game</comment>
    <glob pattern="*.pgn"/>
  </mime-type>
</snip>

If you edit this file and add <sub-class-of type="text/plain"/> after
running update-mime-database then nautilus identifies correctly.

Now, I am unsure if this is a bug in shared-mime-info or nautilus or
both. PGN is a sub-type of text/plain, however there is nothing
ambiguous about the .pgn glob matching.

I am using Ubuntu Dapper (nautilus 2.14.3-0ubuntu1, shared-mime-info
0.17-0ubuntu11)

** Affects: shared-mime-info (Ubuntu)
     Importance: Untriaged
         Status: Unconfirmed

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PGN files detected as text/plain not application/x-chess-pgn
https://launchpad.net/bugs/60095