Transfer color interpolation

[pierotofy]

Should fix #113

[pierotofy]

p.s. not sure why circleci is failing, but tests run fine on the dev machine:

root@af356896952a:/webodm/tmp/rio-cogeo# pytest tests
========================== test session starts ==========================
platform linux -- Python 3.6.9, pytest-5.3.2, py-1.8.0, pluggy-0.13.1
rootdir: /webodm/tmp/rio-cogeo
plugins: cov-2.8.1, celery-4.1.0
collected 53 items                                                      

tests/test_cli.py ................                                [ 30%]
tests/test_cogeo.py ..................                            [ 64%]
tests/test_profile.py .............                               [ 88%]
tests/test_utils.py .                                             [ 90%]
tests/test_validate.py ..                                         [ 94%]
tests/test_web.py ...                                             [100%]

=========================== warnings summary ============================
rio_cogeo/profiles.py:183
tests/test_profile.py::test_profiles_webp
  /webodm/tmp/rio-cogeo/rio_cogeo/profiles.py:183: UserWarning: Non-standard compression schema: webp. The output COG might not be fully supported by software not build against latest libtiff.
    " supported by software not build against latest libtiff.".format(key)

tests/test_profile.py::test_profiles_lerc
  /webodm/tmp/rio-cogeo/rio_cogeo/profiles.py:183: UserWarning: Non-standard compression schema: lerc. The output COG might not be fully supported by software not build against latest libtiff.
    " supported by software not build against latest libtiff.".format(key)

tests/test_profile.py::test_profiles_lerc_deflate
  /webodm/tmp/rio-cogeo/rio_cogeo/profiles.py:183: UserWarning: Non-standard compression schema: lerc_deflate. The output COG might not be fully supported by software not build against latest libtiff.
    " supported by software not build against latest libtiff.".format(key)

tests/test_profile.py::test_profiles_lerc_zstd
  /webodm/tmp/rio-cogeo/rio_cogeo/profiles.py:183: UserWarning: Non-standard compression schema: lerc_zstd. The output COG might not be fully supported by software not build against latest libtiff.
    " supported by software not build against latest libtiff.".format(key)

tests/test_validate.py::test_cog_validate_valid
  /usr/local/lib/python3.6/site-packages/rasterio/__init__.py:219: NotGeoreferencedWarning: Dataset has no geotransform set. The identity matrix may be returned.
    s = DatasetReader(path, driver=driver, sharing=sharing, **kwargs)

-- Docs: https://docs.pytest.org/en/latest/warnings.html
==================== 53 passed, 6 warnings in 5.85s =====================

[vincentsarago]

I'm not sure to understand this part to be honest!

[pierotofy]

I started writing an explanation, and then realized that it's not needed. I was thinking that for the cases where add_alpha=True when creating the VRT I needed to remove the alpha band reference (that doesn't seem to be the case). I'll remove it.

[vincentsarago]

so something like

                if len(indexes) == 1:
                    tmp_dst.colorinterp = [ColorInterp.gray]
                else:
                    tmp_dst.colorinterp = [vrt_dst.colorinterp[b - 1] for b in indexes]

should be enough then

[vincentsarago]

let's add

    if isinstance(indexes, int):
        indexes = (indexes,)

at the beginning of the script (L118) so indexes is always a tuple or a list

[pierotofy]

Changes made 👍

[vincentsarago]

thanks @pierotofy, This now lives in #117

[pierotofy]

Fantastic! Thanks @vincentsarago 🥇