Re: [mythtv-users] Incorrect listings after DST clock change (UK)

Around about 31/03/11 09:42, Neil Bird typed ...
> Attached stand-alone[ish] parse tester [no args/network needed], taking the
> bit from the rt grabber's 'start time' code.

   I've traced it as far as I can, and it would *seem* to be a bug in XMLTV. 
  I say “seem”, as if it was a legitimate bug, I'd expect others to see it.


   The problem stems from XMLTV.pm's init. of Date::Manip in a BEGIN 
statement (line 2112 of my current version):

   Date::Manip::Date_Init("TZ=UTC");


   This forces *DM5* to set it's TZ config. to UTC, so when it parses 
"20110331060000 +0100" it returns the answer in UTC not localtime, as the 
script expects.  I added printing the $Date::Manip::Cnf{TZ} value in my 
previously posted example:

Input is '2011033106:00'
First utc_offset call produced '20110331060000 +0100'
   Implicit timezone calculated to be '+0100'
Date::Manip::DM5 using TZ=UTC
ParseDate output: 2011033105:00:00
parse_date -> '2011033105:00:00'
parse_local_date -> '2011033105:00:00'
date_to_local -> '2011033105:00:00 +0100'
Got '20110331050000 +0100'


   You can see from the ParseDate output that that's where the rogue 05:00 
appears (the grabber then confuses matters by throwing the current TZ string 
back on the end for re-parsing, getting the time wrong in the process).


   If I stop XMLTV from passing that initial TZ=UTC, it all starts working 
properly:

Input is '2011033106:00'
First utc_offset call produced '20110331060000 +0100'
   Implicit timezone calculated to be '+0100'
Date::Manip::DM5 using TZ=BST
ParseData output: 2011033106:00:00
parse_date -> '2011033106:00:00'
parse_local_date -> '2011033106:00:00'
date_to_local -> '2011033106:00:00 +0100'
Got '20110331060000 +0100'

   Not the correctly calculated (by DM5) TZ=BST now.


   Oddly, the TZ init. in XMLTV must have been added *for* DM5, as that 
setting has no effect in DM6 (in DM5 is sets $Cnf{TZ}, in DM6 I can't see it 
doing anything:  it doesn't match anything so gets ignored).

   Colour me totally confused.

-- 
[neil@fnx ~]# rm -f .signature
[neil@fnx ~]# ls -l .signature
ls: .signature: No such file or directory
[neil@fnx ~]# exit


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