Potential dependency conflicts between molo-core and wagtail

[NeolithEra]

Hi, as shown in the following full dependency graph of molo-core, molo-core requires wagtail <2.7,>=2.6.2, molo-core requires wagtailmedia <0.4,>=0.3.1 (wagtailmedia 0.3.1 will be installed, i.e., the newest version satisfying the version constraint), and directed dependency wagtailmedia 0.3.1 transitively introduces wagtail >=2.2.

Obviously, there are multiple version constraints set for wagtail in this project. However, according to pip's “first found wins” installation strategy, wagtail 2.6.3 (i.e., the newest version satisfying constraint <2.7,>=2.6.2) is the actually installed version.

Although the first found package version wagtail 2.6.3 just satisfies the later dependency constraint （wagtail <2.7,>=2.6.2), such installed version is very close to the upper bound of the version constraint of wagtail specified by wagtailmedia 0.3.1.

Once wagtailmedia upgrades，its newest version will be installed. Therefore, it will easily cause a dependency conflict (build failure), if the upgraded wagtailmedia version introduces a higher version of wagtail, violating its another version constraint <2.7,>=2.6.2.

According to the release history of wagtailmedia, it habitually upgrates Wagtail in its recent releases. For instance, wagtailmedia 0.1.3 upgrated Wagtail’s constraint from >=1.5.3 to >=1.6.3, and wagtailmedia 0.3.0 upgrated Wagtail’s constraint from >=1.6.3 to >=2.2.

As such, it is a warm warning of a potential dependency conflict issue for molo-core.

Dependency tree

molo-core   - 10.2.5
| +- babel(install version:2.8.0 version range:*)
| | +- pytz(install version:2019.3 version range:>=2015.7)
| +- beautifulsoup4(install version:4.6.0 version range:==4.6.0)
| +- boto(install version:2.49.0 version range:==2.49.0)
| +- cached-property(install version:1.5.1 version range:*)
| +- celery(install version:3.1.26.post2 version range:<4.0)
| +- cookiecutter(install version:1.0.0 version range:==1.0.0)
| +- dj-database-url(install version:0.5.0 version range:*)
| +- Django(install version: version range:<.3,>=2.2.5)
| +- django-cas-ng(install version:3.6.0 version range:<3.7,>=3.6.0)
| | +- django(install version:3.0.5 version range:>=1.11)
| | | +- asgiref (install version: version range:=3.2)
| | | +- pytz(install version:2019.3 version range:*)
| | | +- sqlparse (install version:0.3.1 version range:>=0.2.2)
| | +- python-cas(install version:1.5.0 version range:>=1.4.0)
| | | +- lxml(install version:4.5.0 version range:>=3.4)
| | | +- requests(install version:2.23.0 version range:>=2.11.1)
| | | | +- certifi(install version:2020.4.5.1 version range:>=2017.4.17)
| | | | +- chardet(install version:3.0.4 version range:>=3.0.2,<4)
| | | | +- idna(install version:2.9 version range:>=2.5,<3)
| | | | +- urllib3(install version:1.25.9 version range:>=1.21.1,<1.26)
| | | +- six(install version:1.14.0 version range:>=1.10.0)
| +- django-daterange-filter(install version:1.3.0 version range:*)
| | +- django(install version:3.0.5 version range:*)
| | | +- asgiref (install version: version range:=3.2)
| | | +- pytz(install version:2019.3 version range:*)
| | | +- sqlparse (install version:0.3.1 version range:>=0.2.2)
| +- django-el-pagination(install version:3.1.0 version range:==3.1.0)
| | +- django(install version:3.0.5 version range:>=1.8.0)
| | | +- asgiref (install version: version range:=3.2)
| | | +- pytz(install version:2019.3 version range:*)
| | | +- sqlparse (install version:0.3.1 version range:>=0.2.2)
| +- django-enumfield(install version:1.5 version range:==1.5)
| +- django-extensions(install version:1.9.9 version range:>=1,<2)
| | +- six(install version:1.14.0 version range:>=1.2)
| | +- typing(install version:3.7.4.1 version range:*)
| +- django-google-analytics-app(install version: version range:<.5,>=4.4.0)
| +- django-import-export(install version:2.0.2 version range:*)
| | +- diff-match-patch(install version:20181111 version range:*)
| | +- Django(install version:3.0.5 version range:>=2.0)
| | | +- asgiref (install version: version range:=3.2)
| | | +- pytz(install version:2019.3 version range:*)
| | | +- sqlparse (install version:0.3.1 version range:>=0.2.2)
| | +- tablib(install version:1.1.0 version range:>=0.14.0)
| +- django-libsass(install version:0.8 version range:*)
| | +- django-compressor(install version:2.4 version range:>=1.3)
| | | +- django-appconf(install version:1.0.4 version range:>=1.0.3)
| | | | +- django(install version:3.0.5 version range:*)
| | | +- rcssmin(install version:1.0.6 version range:==1.0.6)
| | | +- rjsmin(install version:1.1.0 version range:==1.1.0)
| | | +- six(install version:1.14.0 version range:>=1.12.0)
| | +- libsass(install version:0.20.0 version range:<1,>=0.7.0)
| +- django-mptt(install version:0.10.0 version range:<0.11,>=0.10.0)
| | +- django(install version:3.0.5 version range:>=1.11)
| | | +- asgiref (install version: version range:=3.2)
| | | +- pytz(install version:2019.3 version range:*)
| | | +- sqlparse (install version:0.3.1 version range:>=0.2.2)
| | +- django-js-asset(install version:1.2.2 version range:*)
| +- django-phonenumber-field(install version:1.3.0 version range:==1.3.0)
| | +- babel(install version:2.8.0 version range:*)
| | | +- pytz(install version:2019.3 version range:>=2015.7)
| | +- django(install version:3.0.5 version range:>=1.5)
| | | +- asgiref (install version: version range:=3.2)
| | | +- pytz(install version:2019.3 version range:*)
| | | +- sqlparse (install version:0.3.1 version range:>=0.2.2)
| +- django-prometheus(install version:2.1.0.dev14 version range:*)
| +- django-storages(install version:1.7.1 version range:==1.7.1)
| | +- django(install version:3.0.5 version range:>=1.11)
| | | +- asgiref (install version: version range:=3.2)
| | | +- pytz(install version:2019.3 version range:*)
| | | +- sqlparse (install version:0.3.1 version range:>=0.2.2)
| +- django-treebeard(install version:4.2.0 version range:==4.2.0)
| +- djangorestframework(install version:3.10.3 version range:==3.10.3)
| +- ImageHash(install version:3.4 version range:==3.4)
| +- markdown(install version:3.2.1 version range:>=3.0.1)
| | +- setuptools (install version:46.1.3 version range:>=36)
| +- mote-praekelt(install version:0.1.6 version range:<0.2,>=0.1.6)
| | +- beautifulsoup4(install version:4.6.0 version range:*)
| | +- dill(install version:0.3.1.1 version range:*)
| | +- django(install version:3.0.5 version range:*)
| | | +- asgiref (install version: version range:=3.2)
| | | +- pytz(install version:2019.3 version range:*)
| | | +- sqlparse (install version:0.3.1 version range:>=0.2.2)
| | +- djangorestframework(install version:3.10.3 version range:*)
| | +- djangorestframework-jwt(install version:1.11.0 version range:*)
| | | +- pyjwt(install version:1.7.1 version range:<2.0.0,>=1.5.2)
| | +- pypandoc(install version:1.5 version range:*)
| | | +- pip(install version:20.0.2 version range:>=8.1.0)
| | | +- setuptools(install version:46.1.3 version range:*)
| | | +- wheel(install version:0.34.2 version range:>=0.25.0)
| | +- pyyaml(install version:5.3.1 version range:*)
| | +- six(install version:1.14.0 version range:*)
| | +- xmltodict(install version:0.12.0 version range:*)
| | +- yamlordereddictloader(install version:0.4.0 version range:*)
| | | +- pyyaml(install version:5.3.1 version range:*)
| +- prometheus_client(install version: version range:*)
| +- raven(install version:6.10.0 version range:<6.11,>=6.10.0)
| +- redis(install version:3.4.1 version range:*)
| +- requests(install version:2.23.0 version range:*)
| | +- certifi(install version:2020.4.5.1 version range:>=2017.4.17)
| | +- chardet(install version:3.0.4 version range:>=3.0.2,<4)
| | +- idna(install version:2.9 version range:>=2.5,<3)
| | +- urllib3(install version:1.25.9 version range:>=1.21.1,<1.26)
| +- setuptools(install version:46.1.3 version range:>=18.5)
| +- six(install version:1.14.0 version range:>=1.12.0)
| +- ujson(install version:1.35 version range:==1.35)
| +- unicodecsv(install version:0.14.1 version range:==0.14.1)
| +- unicore.content(install version:1.0.4 version range:*)
| +- Unidecode(install version:0.04.16 version range:==0.04.16)
| +- wagtail(install version:2.6.3 version range:<2.7,>=2.6.2)
| | +- beautifulsoup4(install version:4.6.0 version range:>=4.5.1,<4.6.1)
| | +- django(install version:2.2.12 version range:>=2.0,<2.3)
| | | +- pytz(install version:2019.3 version range:*)
| | | +- sqlparse(install version:0.3.1 version range:*)
| | +- django-modelcluster(install version:4.4.1 version range:>=4.2,<5.0)
| | | +- pytz(install version:2019.3 version range:>=2015.2)
| | +- django-taggit(install version:0.24.0 version range:<1.0,>=0.23)
| | | +- django(install version:3.0.5 version range:>=1.11)
| | | | +- asgiref (install version: version range:=3.2)
| | | | +- pytz(install version:2019.3 version range:*)
| | | | +- sqlparse (install version:0.3.1 version range:>=0.2.2)
| | +- django-treebeard(install version:4.2.0 version range:>=4.2.0,<5.0)
| | +- djangorestframework(install version:3.10.3 version range:>=3.7.4,<4.0)
| | +- draftjs-exporter(install version:2.1.7 version range:<3.0,>=2.1.5)
| | +- html5lib(install version:1.0.1 version range:>=0.999,<2)
| | | +- six(install version:1.14.0 version range:>=1.9)
| | | +- webencodings(install version:0.5.1 version range:*)
| | +- pillow(install version:6.2.2 version range:<7.0.0,>=4.0.0)
| | | +- black(install version:19.10b0 version range:*)
| | | | +- appdirs(install version:1.4.3 version range:*)
| | | | +- attrs(install version:19.3.0 version range:>=18.1.0)
| | | | +- click(install version:7.1.1 version range:>=6.5)
| | | | +- pathspec(install version:0.8.0 version range:>=0.6,<1)
| | | | +- regex(install version:2020.4.4 version range:*)
| | | | +- toml(install version:0.10.0 version range:>=0.9.4)
| | | | +- typed-ast(install version:1.4.1 version range:>=1.4.0)
| | | +- check-manifest(install version:0.41 version range:*)
| | | | +- pep517(install version:0.8.2 version range:*)
| | | | +- toml(install version:0.10.0 version range:*)
| | | +- coverage(install version:5.1 version range:*)
| | | +- coveralls(install version:2.0.0 version range:*)
| | | | +- coverage(install version:5.1 version range:>=4.1,<6.0)
| | | | +- docopt(install version:0.6.2 version range:>=0.6.1)
| | | | +- requests(install version:2.23.0 version range:>=1.0.0)
| | | +- jarn.viewdoc(install version:2.3 version range:*)
| | | +- olefile(install version:0.46 version range:*)
| | | +- pycodestyle(install version:2.5.0 version range:*)
| | | +- pyflakes(install version:2.2.0 version range:*)
| | | +- pyroma(install version:2.6 version range:*)
| | | | +- docutils(install version:0.16 version range:*)
| | | | +- pygments(install version:2.6.1 version range:*)
| | | | +- setuptools(install version:46.1.3 version range:*)
| | | +- pytest(install version:5.4.1 version range:*)
| | | | +- atomicwrites(install version:1.3.0 version range:>=1.0)
| | | | +- attrs(install version:19.3.0 version range:>=17.4.0)
| | | | +- colorama(install version:0.4.3 version range:*)
| | | | +- importlib-metadata(install version:1.6.0 version range:>=0.12)
| | | | +- more-itertools(install version:8.2.0 version range:>=4.0.0)
| | | | +- packaging(install version:20.3 version range:*)
| | | | +- pathlib2(install version:2.3.5 version range:>=2.2.0)
| | | | +- pluggy(install version:0.13.1 version range:>=0.12,<1.0)
| | | | +- py(install version:1.8.1 version range:>=1.5.0)
| | | | +- wcwidth(install version:0.1.9 version range:*)
| | | +- pytest-cov(install version:2.8.1 version range:*)
| | | | +- coverage(install version:5.1 version range:>=4.4)
| | | | +- pytest(install version:5.4.1 version range:>=3.6)
| | | +- sphinx-rtd-theme(install version:0.4.3 version range:*)
| | | | +- sphinx(install version:3.0.1 version range:*)
| | +- pytz(install version:2019.3 version range:>=2016.6)
| | +- requests(install version:2.23.0 version range:>=2.11.1,<3.0)
| | | +- certifi(install version:2020.4.5.1 version range:>=2017.4.17)
| | | +- chardet(install version:3.0.4 version range:>=3.0.2,<4)
| | | +- idna(install version:2.9 version range:>=2.5,<3)
| | | +- urllib3(install version:1.25.9 version range:>=1.21.1,<1.26)
| | +- six(install version:1.14.0 version range:>=1.11,<2.0)
| | +- unidecode(install version:1.1.1 version range:>=0.04.14,<2.0)
| | +- willow(install version:1.1 version range:<1.2,>=1.1)
| +- wagtailmedia(install version:0.3.1 version range:<0.4,>=0.3.1)
| | +- wagtail(install version:2.6.3 version range:>=2.2)
| | | +- beautifulsoup4(install version:4.6.0 version range:>=4.5.1,<4.6.1)
| | | +- django(install version:2.2.12 version range:>=2.0,<2.3)
| | | | +- pytz(install version:2019.3 version range:*)
| | | | +- sqlparse(install version:0.3.1 version range:*)
| | | +- django-modelcluster(install version:4.4.1 version range:>=4.2,<5.0)
| | | | +- pytz(install version:2019.3 version range:>=2015.2)
| | | +- django-taggit(install version:0.24.0 version range:<1.0,>=0.23)
| | | | +- django(install version:3.0.5 version range:>=1.11)
| | | +- django-treebeard(install version:4.2.0 version range:>=4.2.0,<5.0)
| | | +- djangorestframework(install version:3.10.3 version range:>=3.7.4,<4.0)
| | | +- draftjs-exporter(install version:2.1.7 version range:<3.0,>=2.1.5)
| | | +- html5lib(install version:1.0.1 version range:>=0.999,<2)
| | | | +- six(install version:1.14.0 version range:>=1.9)
| | | | +- webencodings(install version:0.5.1 version range:*)
| | | +- pillow(install version:6.2.2 version range:<7.0.0,>=4.0.0)
| | | | +- black(install version:19.10b0 version range:*)
| | | | +- check-manifest(install version:0.41 version range:*)
| | | | +- coverage(install version:5.1 version range:*)
| | | | +- coveralls(install version:2.0.0 version range:*)
| | | | +- jarn.viewdoc(install version:2.3 version range:*)
| | | | +- olefile(install version:0.46 version range:*)
| | | | +- pycodestyle(install version:2.5.0 version range:*)
| | | | +- pyflakes(install version:2.2.0 version range:*)
| | | | +- pyroma(install version:2.6 version range:*)
| | | | +- pytest(install version:5.4.1 version range:*)
| | | | +- pytest-cov(install version:2.8.1 version range:*)
| | | | +- sphinx-rtd-theme(install version:0.4.3 version range:*)
| | | +- pytz(install version:2019.3 version range:>=2016.6)
| | | +- requests(install version:2.23.0 version range:>=2.11.1,<3.0)
| | | | +- certifi(install version:2020.4.5.1 version range:>=2017.4.17)
| | | | +- chardet(install version:3.0.4 version range:>=3.0.2,<4)
| | | | +- idna(install version:2.9 version range:>=2.5,<3)
| | | | +- urllib3(install version:1.25.9 version range:>=1.21.1,<1.26)
| | | +- six(install version:1.14.0 version range:>=1.11,<2.0)
| | | +- unidecode(install version:1.1.1 version range:>=0.04.14,<2.0)
| | | +- willow(install version:1.1 version range:<1.2,>=1.1)

Thanks for your help. Best, Neolith

[NeolithEra]

Suggested Solution

1. Loosen the version range of wagtail to be >=2.6.2.
2. Remove your direct dependency wagtail, and use the wagtail transitively introduced by wagtailmedia.
3. Change your direct dependency wagtailmedia to be <=0.3.1. @codiebeulaine Which solution do you prefer, 1 ,2or 3? Please let me know your choice. May I pull a request to solve this issue?

[NeolithEra]

@moh-moola，Could you help me review this issue? Thx :p