Compiling error from git_rev.py

[FernandoGarcia]

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Hi!

The script git_rev.py will cause compiling error when the code is downloaded as .zip instead git clone.

The compiling error:

fatal: not a git repository (or any of the parent directories): .git
Traceback (most recent call last):
  File "git_rev.py", line 4, in <module>
    version = subprocess.check_output(tagcmd, shell=True).decode().strip()
  File "/usr/lib/python3.7/subprocess.py", line 411, in check_output
    **kwargs).stdout
  File "/usr/lib/python3.7/subprocess.py", line 512, in run
    output=stdout, stderr=stderr)

The script searchs for git flags but files from .zip are not a git repository.

Please check this thread for more details.

Best regards.

[pppedrillo]

Related to #486 @MarcoCLA