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# MIT licensed
# Copyright (c) 2022 Pekka Ristola <pekkarr [at] protonmail [dot] com>, et al.
from nvchecker.api import session, RichResult, GetVersionError
CRAN_URL = 'https://cran.r-project.org/package=%s/DESCRIPTION'
VERSION_FIELD = 'Version: '
async def request(pkg):
url = CRAN_URL % pkg
res = await session.get(url)
return res.body.decode('utf-8', errors='ignore')
async def get_version(name, conf, *, cache, **kwargs):
package = conf.get('cran', name)
desc = await cache.get(package, request)
for line in desc.splitlines():
if line.startswith(VERSION_FIELD):
version = line[len(VERSION_FIELD):]
break
else:
raise GetVersionError('Invalid DESCRIPTION file')
return RichResult(
version = version,
url = f'https://cran.r-project.org/web/packages/{package}/',
)
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