Re: [netcdfgroup] 4.2-rc1, ncgen, _Format attribute

• To: dmh@xxxxxxxxxxxxxxxx, Russ Rew <russ@xxxxxxxxxxxxxxxx>
• Subject: Re: [netcdfgroup] 4.2-rc1, ncgen, _Format attribute
• From: Jim Cowie <cowie@xxxxxxxx>
• Date: Wed, 01 Feb 2012 21:56:32 -0700

This was not a 'no flags' case as I was using -o to create the output file. 

Thanks


Dennis Heimbigner <dmh@xxxxxxxxxxxxxxxx> wrote:

>Yes, I forgot about the -b flag.
>That is the appropriate one to use.
>
>Russ Rew wrote:
>>> Jim-
>>> Unfortunately, ncgen has always treated
>>> the no flags case as being just a syntax
>>> check. I agree with your intent, but
>>> we are captives of history and back compatability.
>> 
>> I think ncgen could still treat no flags as a syntax check, but use of
>> -b or -o specifying an output file means a netCDF output should be
>> generated.  In that case, I don't see the need for specifying a "-k"
>> when the type of output can be inferred from the CDL.
>> 
>> This request was actually entered a few months ago in Jira ticket
>> NCF-124:
>> 
>>   https://www.unidata.ucar.edu/jira/browse/NCF-124
>> 
>> I don't think it would violate our backward compatibility commitment,
>> which is about APIs and data.
>> 
>> --Russ
>> 
>>> Jim Cowie wrote:
>>>> Hi,
>>>>
>>>> I built netcdf-4.2-rc1 and I was not able to create a file using ncgen 
>>>> unless I included the '-k kind' option. With this option omitted, 
>>>> nothing happens.
>>>>
>>>> I hope this is not intentional because it would be a step in the wrong 
>>>> direction. My goal is to *never* use the -k option, but rather to use 
>>>> the _Format attribute within the CDL to define the output file type at 
>>>> run-time. Based on earlier discussions I've had with Unidata, and some 
>>>> documentation I've seen, this was the intent of the _Format attribute. 
>>>> Using -k would override what is in the CDL. Now I'm not sure what to think.
>>>>
>>>> Thanks ...
>>>>
>>>> Jim Cowie
>>>>
>>>>
>>>>
>>>>
>>>>
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    • From: Jim Cowie