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enforce stable aws endpoint for cartopy_feature_download.py #1837

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merged 2 commits into from
Sep 3, 2021
Merged

enforce stable aws endpoint for cartopy_feature_download.py #1837

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daed88b
enforce aws endpoint for feature download
bjlittle Sep 3, 2021
1f0802c
stickler fixes et al
bjlittle Sep 3, 2021
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30 changes: 26 additions & 4 deletions tools/cartopy_feature_download.py
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Original file line number Diff line number Diff line change
Expand Up @@ -10,19 +10,24 @@

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

python download.py -h
python cartopy_feature_download.py -h

"""

import argparse
import pathlib

from cartopy import config
from cartopy.feature import Feature, GSHHSFeature, NaturalEarthFeature
from cartopy.io import Downloader
from cartopy.io import Downloader, DownloadWarning


ALL_SCALES = ('110m', '50m', '10m')

# See https://github.com/SciTools/cartopy/pull/1833
URL_TEMPLATE = ('https://naturalearth.s3.amazonaws.com/{resolution}_'
'{category}/ne_{resolution}_{name}.zip')
SHP_NE_SPEC = ('shapefiles', 'natural_earth')

FEATURE_DEFN_GROUPS = {
# Only need one GSHHS resolution because they *all* get downloaded
Expand Down Expand Up @@ -114,11 +119,28 @@ def download_features(group_names, dry_run=True):
action='store_true')
parser.add_argument('--ignore-repo-data', action='store_true',
help='ignore existing repo data when downloading')
parser.add_argument('--no-warn',
action='store_true',
help='ignore cartopy "DownloadWarning" warnings')
args = parser.parse_args()

if args.output:
config['pre_existing_data_dir'] = args.output
config['data_dir'] = args.output
target_dir = pathlib.Path(args.output).expanduser().resolve()
target_dir.mkdir(parents=True, exist_ok=True)
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The exist_ok flag was added in Python 3.5, so I assume it's okay to use here...surely 😜

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I guess you'll just get an error if you want to try with an earlier Python version ;)

config['pre_existing_data_dir'] = target_dir
config['data_dir'] = target_dir
if args.ignore_repo_data:
config['repo_data_dir'] = config['data_dir']
if args.no_warn:
import warnings
warnings.filterwarnings('ignore', category=DownloadWarning)

# Enforce use of stable AWS endpoint, regardless of cartopy version.
# In doing so, this allows users to download this script and execute it
# with any version of cartopy, thus taking advantage of the stable AWS
# endpoint.
# This removes the need to backport the associated fix
# https://github.com/SciTools/cartopy/pull/1833.
config['downloaders'][SHP_NE_SPEC].url_template = URL_TEMPLATE

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