The `BUILD_WITH_GEO_LIBRARIES` feature was removed in the previous PR,
and replaced with a warning that the feature is no longer supported.
After further thought I believe it would be best to make this warning
fatal, to prevent unexpected failures at runtime, if consumers of the
library either aren't invoked during the build, or were previously
installed/cached and were dynamically linked against the library.
Continuation of #1113 / @W-7654424@.
The standalone Geo buildpack offers more modern GDAL/GEOS/PROJ library
versions, and can be used by apps in all languages, not just Python:
https://github.com/heroku/heroku-geo-buildpack
As such the Python buildpack's undocumented built-in support was
deprecated back in April 2020, with a scheduled removal date of
6th October 2020:
https://devcenter.heroku.com/changelog-items/1759https://help.heroku.com/D5INLB1A/python-s-build_with_geo_libraries-legacy-feature-is-now-deprecated
Metrics show very few builds continuing to use the built-in support.
Apps with the `BUILD_WITH_GEO_LIBRARIES` env var set will now be shown a
warning directing them to the standalone buildpack, as well as apps that
hit GDAL related pip install errors but aren't using the env var.
This also moves us one step closer to being able to remove
the vendored copy of pip-pop (which is partially broken on
newer pip).
Closes @W-7654424@.
Since the stack is end of life and builds have been disabled:
https://devcenter.heroku.com/changelog-items/1943
There are only two temporarily exempted customers using Python, who
can switch to the Cedar-14 support branch if they still need to build
their Python apps (most of which haven't been built recently).
Closes @W-8054727@.
Ed Morley
kennethreitz