Re: [Telegram-Desktop]: Help with packaging

[Ricardo Wurmus <rekado@elephly.net>]

Raghav Gururajan <rg@raghavgururajan.name> writes:

> Hello Guix!
>
>> With this email, I have attached the complete diff, which is to be 
>> applied on top of master.
>
> I have attached wrong file before. Here is the correct one attached.

The error you posted is this:

--8<---------------cut here---------------start------------->8---
Traceback (most recent call last):
  File "/gnu/store/q9rm8h9imazsq2c4qiv2yjpvlvliywqb-python-3.8.2/lib/python3.8/xml/etree/ElementTree.py", line 786, in _get_writer
    write = file_or_filename.write
AttributeError: 'str' object has no attribute 'write'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/tmp/guix-build-tdesktop-2.5.1.drv-0/source/Telegram/build/changelog2appdata.py", line 73, in <module>
    main()
  File "/tmp/guix-build-tdesktop-2.5.1.drv-0/source/Telegram/build/changelog2appdata.py", line 68, in main
    update_appdata(args.appdata_path,
  File "/tmp/guix-build-tdesktop-2.5.1.drv-0/source/Telegram/build/changelog2appdata.py", line 60, in update_appdata
    appdata.write(appdata_path, encoding="utf-8", xml_declaration=True)
  File "/gnu/store/q9rm8h9imazsq2c4qiv2yjpvlvliywqb-python-3.8.2/lib/python3.8/xml/etree/ElementTree.py", line 756, in write
    with _get_writer(file_or_filename, enc_lower) as write:
  File "/gnu/store/q9rm8h9imazsq2c4qiv2yjpvlvliywqb-python-3.8.2/lib/python3.8/contextlib.py", line 113, in __enter__
    return next(self.gen)
  File "/gnu/store/q9rm8h9imazsq2c4qiv2yjpvlvliywqb-python-3.8.2/lib/python3.8/xml/etree/ElementTree.py", line 792, in _get_writer
    file = open(file_or_filename, "w", encoding=encoding,
PermissionError: [Errno 13] Permission denied: '/tmp/guix-build-tdesktop-2.5.1.drv-0/build/Telegram/telegramdesktop.appdata.xml'
--8<---------------cut here---------------end--------------->8---

Because you are fetching from git and the git checkout is not writable
You need a build phase like this:

--8<---------------cut here---------------start------------->8---
         (add-after 'unpack 'make-writable
           (lambda _
             (map make-file-writable
                  (find-files "." ".*"))
             #t))
--8<---------------cut here---------------end--------------->8---


-- 
Ricardo