Use an Aptfile to install geodjango system dependencies.

[n1k0]

This is to circumvent an ongoing issue with Scalingo's geo-buildpack.

Docs:

• Scalingo apt buildpack
• Geodjango ubuntu/debian system dependencies

[n1k0]

Blocked here :

OSError: libblas.so.3: cannot open shared object file: No such file or directory

Details:

Sqlite3 successfully installed.
-----> $ python manage.py collectstatic --noinput
       Traceback (most recent call last):
         File "manage.py", line 21, in <module>
           main()
         File "manage.py", line 17, in main
           execute_from_command_line(sys.argv)
         File "/app/.scalingo/python/lib/python3.8/site-packages/django/core/management/__init__.py", line 401, in execute_from_command_line
           utility.execute()
         File "/app/.scalingo/python/lib/python3.8/site-packages/django/core/management/__init__.py", line 377, in execute
           django.setup()
         File "/app/.scalingo/python/lib/python3.8/site-packages/django/__init__.py", line 24, in setup
           apps.populate(settings.INSTALLED_APPS)
         File "/app/.scalingo/python/lib/python3.8/site-packages/django/apps/registry.py", line 114, in populate
           app_config.import_models()
         File "/app/.scalingo/python/lib/python3.8/site-packages/django/apps/config.py", line 211, in import_models
           self.models_module = import_module(models_module_name)
         File "/app/.scalingo/python/lib/python3.8/importlib/__init__.py", line 127, in import_module
           return _bootstrap._gcd_import(name[level:], package, level)
         File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
         File "<frozen importlib._bootstrap>", line 991, in _find_and_load
         File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
         File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
         File "<frozen importlib._bootstrap_external>", line 783, in exec_module
         File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
         File "/build/1a0165d2-f674-4c7f-9ea6-f8f9a34e9f53/erp/models.py", line 6, in <module>
           from django.contrib.gis.db import models
         File "/app/.scalingo/python/lib/python3.8/site-packages/django/contrib/gis/db/models/__init__.py", line 3, in <module>
           import django.contrib.gis.db.models.functions  # NOQA
         File "/app/.scalingo/python/lib/python3.8/site-packages/django/contrib/gis/db/models/functions.py", line 3, in <module>
           from django.contrib.gis.db.models.fields import BaseSpatialField, GeometryField
         File "/app/.scalingo/python/lib/python3.8/site-packages/django/contrib/gis/db/models/fields.py", line 3, in <module>
           from django.contrib.gis import forms, gdal
         File "/app/.scalingo/python/lib/python3.8/site-packages/django/contrib/gis/forms/__init__.py", line 3, in <module>
           from .fields import (  # NOQA
         File "/app/.scalingo/python/lib/python3.8/site-packages/django/contrib/gis/forms/fields.py", line 2, in <module>
           from django.contrib.gis.gdal import GDALException
         File "/app/.scalingo/python/lib/python3.8/site-packages/django/contrib/gis/gdal/__init__.py", line 28, in <module>
           from django.contrib.gis.gdal.datasource import DataSource
         File "/app/.scalingo/python/lib/python3.8/site-packages/django/contrib/gis/gdal/datasource.py", line 39, in <module>
           from django.contrib.gis.gdal.driver import Driver
         File "/app/.scalingo/python/lib/python3.8/site-packages/django/contrib/gis/gdal/driver.py", line 5, in <module>
           from django.contrib.gis.gdal.prototypes import ds as vcapi, raster as rcapi
         File "/app/.scalingo/python/lib/python3.8/site-packages/django/contrib/gis/gdal/prototypes/ds.py", line 9, in <module>
           from django.contrib.gis.gdal.libgdal import GDAL_VERSION, lgdal
         File "/app/.scalingo/python/lib/python3.8/site-packages/django/contrib/gis/gdal/libgdal.py", line 50, in <module>
           lgdal = CDLL(lib_path)
         File "/app/.scalingo/python/lib/python3.8/ctypes/__init__.py", line 373, in __init__
           self._handle = _dlopen(self._name, mode)
       OSError: libblas.so.3: cannot open shared object file: No such file or directory
 !     Error while running '$ python manage.py collectstatic --noinput'.

Found a similar issue reported to heroku apt-buildpack, with no fix mentioned so far :(

[n1k0]

The standard geo-buildpack seems to be working again on master. I'm closing this, but may reopen if this happens again.