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MNT: Move cartopy feature download script into the package #2263

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Jan 10, 2024
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MNT: Move cartopy feature download script into the package #2263

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4 changes: 3 additions & 1 deletion .github/workflows/ci-testing.yml
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Expand Up @@ -72,7 +72,9 @@ jobs:
shell: bash
run: |
# Check that the downloader tool at least knows where to get the data from (but don't actually download it)
python tools/cartopy_feature_download.py gshhs physical --dry-run
python -m cartopy.feature.download gshhs physical --dry-run
# It should also be available as a script
cartopy_feature_download gshhs physical --dry-run
CARTOPY_GIT_DIR=$PWD
pytest -ra -n 4 \
--color=yes \
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8 changes: 6 additions & 2 deletions tools/cartopy_feature_download.py → lib/cartopy/feature/download/__main__.py
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Expand Up @@ -10,7 +10,7 @@

For detail on how to use this tool, execute it with the `-h` option:

python cartopy_feature_download.py -h
python -m cartopy.feature.download -h

"""

Expand Down Expand Up @@ -107,7 +107,7 @@ def download_features(group_names, dry_run=True):
''.format(category, name, scale, len(geoms)))


if __name__ == '__main__':
def main():
parser = argparse.ArgumentParser(description='Download feature datasets.')
parser.add_argument('group_names', nargs='+',
choices=FEATURE_DEFN_GROUPS,
Expand Down Expand Up @@ -146,3 +146,7 @@ def download_features(group_names, dry_run=True):
config['downloaders'][SHP_NE_SPEC].url_template = URL_TEMPLATE

download_features(args.group_names, dry_run=args.dry_run)


if __name__ == '__main__':
main()
2 changes: 1 addition & 1 deletion pyproject.toml
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Expand Up @@ -56,7 +56,7 @@ plotting = ["pillow>=6.1.0", "scipy>=1.3.1"]
test = ["pytest>=5.1.2", "pytest-mpl>=0.11", "pytest-xdist", "pytest-cov", "coveralls"]

[project.scripts]
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In addition to the Why not leaving it also as executable script that is installed with the package, typically named cartopy_feature_download? Maybe you must declare a main function in the __main__ module for that.

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Yeah, I think you're right, we need to define a function that can be called from the script for that. I moved the content in the if block inside a separate main() function like you suggested.

Now you can access this script via: python -m cartopy.feature.download -h or cartopy_feature_download gshhs physical --dry-run

I guess this just brings up the question of whether this installed script is desired or not. I don't have a major preference either way, but would probably slightly lean towards not including it in the scripts section since it is not a critical piece of cartopy. But, it looks like you @stefraynaud were the one that added this as an installation piece, so maybe it is useful for you as a standalone script? Previously, I think it made sense because it was only accessible via a git clone of the repository to access the tools directory, but now you can execute the module which is installed with the package as well.

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Installing these data once for all is useful when used for instance on a computer node that has no internet access.
I had to solve the problem for several people that don't necessarily git clone cartopy.
It is not critical because of cartopy_offlinedata conda package but not everyone has their own python installation to add this package.
Making it easily accessible as an executable is not difficult once the main function is declared. Then we just have to say "execute cartopy_feature_download -h from whereever your are".

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Agree with the first part on this function being useful without git cloning.

My second part was just suggesting to now tell users from wherever you are type: python -m cartopy.feature.download -h

But, I'm fine either way with including the install script, so left it in for now.

feature_download = "tools.cartopy_feature_download.py:__main__"
cartopy_feature_download = "cartopy.feature.download.__main__:main"

[project.urls]
documentation='https://scitools.org.uk/cartopy/docs/latest/'
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