Trouble with Emerge

[Patrick Spendrin]

Am 25.02.2012 12:02, schrieb Pedro Lopez-Cabanillas:
> On Saturday 25 February 2012, Patrick Spendrin wrote:
>> Am 25.02.2012 01:19, schrieb Pedro Lopez-Cabanillas:
>>> On Tuesday 21 February 2012, Andre Heinecke wrote:
>>>> Am Donnerstag 16 Februar 2012 11:20:52 schrieb erle tveit-hansen:
>>>>> Hi!
>>>>> I'm having trouble getting KDE using Emerge. I have edited kdesettings 
> and
>>>>> run kdeenv, but when I try to run emerge qt I get an error message 
> saying
>>>>> there's a syntax error on line 168 of emerge.py, even though I haven't
>>>>> touched it.. I assume this is caused by some other error, but I have no
>>>>> idea what. Any help is appreciated.
>>>>
>>>> There were no changes to this file recently and it works here of course, 
> can 
>>>> you please check with git diff that it is really unchanged and also 
> please 
>>>> check your Python Version. You need Python 2.7 for emerge.
>>>
>>> http://techbase.kde.org/Getting_Started/Build/Windows/emerge says:
>>> "Beginning from the KDE 4.8 (including master and the frameworks branch) 
>>> Python 3.2 will be required."
>>>
>>> The 4.8 announcement at 
>>>
> http://windows.kde.org/news.php#itemKDESoftwareCompilation480forWindowsavailable
>>> also suggests that KDE 4.8 has moved to Python 3.
>>>
>>> Following the previous documents, anybody trying emerge for KDE 4.8 will 
>>> install Python 3.2, which doesn't work (throws a syntax error on line 168 
> of 
>>> emerge.py)
>>
>> Hm, does the same happen for the python3 branch btw.? Those two should
>> be similar. There is one more thing I can think of: Python registers the
>> file extension .py to whichever python was installed last. Theoretically
>> emerge shouldn't depend on that (at least we have tried to remove that),
>> but you never know. Also please make sure that the environment variable
>> PYTHONPATH is set to the location of your python 3.2. I'll have a new
>> clean computer available to set up in a few days, if this error doesn't
>> go away, I'll try to find it then.
> 
> I've started with a clean system, without any previous Python version. Then, 
> I've installed Python 3.2 following the advices in the document: 
> "techbase.kde.org/Getting_Started/Build/Windows/emerge". In order to get the 
> emerge tool, this document provides a command line:
> 
> 	git clone git://anongit.kde.org/emerge.git
> 
> I have master/trunk just after getting emerge from the git repository. With 
> Python 3.2 I get a syntax error in emerge.py, line 168.
> 
> C:\kderoot\emerge\bin>emerge --help
>   File "C:\kderoot\emerge\bin\emerge.py", line 168
>     """
>       ^
> SyntaxError: invalid syntax

If that is the (old) master branch, then that is to be expected, because
master (which is the default branch you checkout) is still only working
with python 2.7.

> 
>>>
>>> Can anybody clarify if there is something that requires Python 3 for KDE 
> 4.8,  
>>> And if not, please fix the documentation?
>>
>> Python 3 is required for using the kde-4.8 branch to build KDE 4.8.
> 
> I can confirm that Python 3.2 works with the emerge-kde-4.8 branch, but fails 
> with the master/trunk branch. This is weird, isn't the master branch supposed 
> to be  newer, and the currently developing one?

Well, originally we started doing python 3 work as a branch from master.
After a while, we made kde-4.8 branch from python3 and adapted it to the
needs. All the time we kept master so updates for the old python 2 can
still be done. In some days I will rename master to master-old, make
python3 be the new master branch.

> 
> The document is not clear about the relationship between emerge branches and 
> Python versions.
> 
> Additionally, git cloning and switching branches is unfriendly, and the 
> documentation is too sparse at this point. There should be a strong remark 
> that after cloning the emerge repository the user needs to switch the branch 
> for the KDE version he wants to compile. A friendlier alternative would be to 
> offer a zip file containing a basic "C:\kderoot" directory for the last stable 
> KDE release containing emerge, the most basic development tools and up to date 
> documentation.

There is another point why we already thought of doing that: you need a
second git client to checkout emerge, emerge itself will ignore that and
just redownload one.
I think we will probably rethink if we can provide something like that.
Since Ralf started something like that already once, maybe he can say
something about it.

> 
> Regards,
> Pedro

regards,
Patrick