Sign vrt-strings

[TomAugspurger]

xref #32, which also includes feature requests for signing files. This handles the in-memory string portion of things.

The imagined workflow here is something like

$ gdal_translate "STACIT:\"https://planetarycomputer.microsoft.com/api/stac/v1/search?collections=naip&bbox=-100,40,-99,41&datetime=2019-01-01T00:00:00Z%2F..\":asset=image" out.vrt

And then using it from Python like

In [1]: import pathlib, planetary_computer, rioxarray

In [2]: signed_vrt = planetary_computer.sign(pathlib.Path("out.vrt").read_text())

In [3]: ds = rioxarray.open_rasterio(signed_vrt)

In [4]: ds
Out[4]:
<xarray.DataArray (band: 4, y: 25023, x: 161196)>
[16134430032 values with dtype=uint8]
Coordinates:
  * band         (band) int64 1 2 3 4
  * x            (x) float64 4.09e+05 4.09e+05 4.09e+05 ... 5.057e+05 5.057e+05
  * y            (y) float64 4.436e+06 4.436e+06 ... 4.421e+06 4.421e+06
    spatial_ref  int64 0
Attributes:
    scale_factor:  1.0
    add_offset:    0.0
    long_name:     ('Red', 'Green', 'Blue', 'NIR')

[TomAugspurger]

Seems like the pinned version of black didn't work with the latest Python 3.9:

Running black...
Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.9.8/x64/bin/black", line 5, in <module>
    from black import patched_main
  File "/opt/hostedtoolcache/Python/3.9.8/x64/lib/python3.9/site-packages/black/__init__.py", line 52, in <module>
    from typed_ast import ast3, ast27
  File "/opt/hostedtoolcache/Python/3.9.8/x64/lib/python3.9/site-packages/typed_ast/ast3.py", line 40, in <module>
    from typed_ast import _ast3
ImportError: /opt/hostedtoolcache/Python/3.9.8/x64/lib/python3.9/site-packages/typed_ast/_ast3.cpython-39-x86_64-linux-gnu.so: undefined symbol: _PyUnicode_DecodeUnicodeEscape

I bumped those deps in c937cb1

[TomAugspurger]

For the record, this doesn't seem to have a measurable effect on the timing of planetary_computer.sign(url):

# main, after signing a URL to get a cached token
In [5]: %timeit planetary_computer.sign(url)
12.2 µs ± 1.97 µs per loop (mean ± std. dev. of 7 runs, 100000 loops each)

# HEAD
In [4]: %timeit planetary_computer.sign(url)
11.3 µs ± 1.7 µs per loop (mean ± std. dev. of 7 runs, 100000 loops each)

[TomAugspurger]

FYI @lossyrob, I plan to merge this sometime today. It shouldn't have any effect on existing behavior and I think is pretty uncontroversial.

[lossyrob]

🚀