Binder is broken

[astrojuanlu]

Clicking on the Binder button on the poliastro README produces a build error:

ERROR: Could not find a version that satisfies the requirement astropy<6,>=5.0 (from poliastro) (from versions: 0.1, 0.2, 0.2.1, 0.2.2, 0.2.3, 0.2.4, 0.2.5, 0.3, 0.3.1, 0.3.2, 0.4rc1, 0.4rc2, 0.4, 0.4.1, 0.4.2, 0.4.3, 0.4.4, 0.4.5, 0.4.6, 1.0rc1, 1.0rc2, 1.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7, 1.0.8, 1.0.9, 1.0.10, 1.0.11, 1.0.12, 1.0.13, 1.1b1, 1.1rc1, 1.1rc2, 1.1, 1.1.post1, 1.1.post2, 1.1.1, 1.1.2, 1.2rc1, 1.2, 1.2.1, 1.2.2, 1.3rc1, 1.3, 1.3.1, 1.3.2, 1.3.3, 2.0rc1, 2.0, 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.0.5, 2.0.6, 2.0.7, 2.0.8, 2.0.9, 2.0.10, 2.0.11, 2.0.12, 2.0.13, 2.0.14, 2.0.15, 2.0.16, 3.0rc1, 3.0rc2, 3.0, 3.0.1, 3.0.2, 3.0.3, 3.0.4, 3.0.5, 3.1rc1, 3.1rc2, 3.1, 3.1.1, 3.1.2, 3.2rc1, 3.2rc2, 3.2, 3.2.1, 3.2.2, 3.2.3, 4.0rc1, 4.0rc2, 4.0, 4.0.1, 4.0.1.post1, 4.0.2, 4.0.3, 4.0.4, 4.0.5, 4.0.6.dev27461, 4.0.6, 4.1rc1, 4.1rc2, 4.1, 4.2rc1, 4.2, 4.2.1, 4.3rc1, 4.3, 4.3.post1, 4.3.1)
ERROR: No matching distribution found for astropy<6,>=5.0

Full logs:

Waiting for build to start...
Picked Git content provider.
Cloning into '/tmp/repo2docker6k9y_a59'...
HEAD is now at da11159b Merge pull request #1455 from airpods69/disabled-parallel-jit-for-32bit
Building conda environment for python=3.7Using PythonBuildPack builder
Building conda environment for python=3.7Building conda environment for python=3.7Step 1/53 : FROM buildpack-deps:bionic
 ---> 872a6bfe806a
Step 2/53 : ENV DEBIAN_FRONTEND=noninteractive
 ---> Using cache
 ---> fdb66914281a
Step 3/53 : RUN apt-get -qq update &&     apt-get -qq install --yes --no-install-recommends locales > /dev/null &&     apt-get -qq purge &&     apt-get -qq clean &&     rm -rf /var/lib/apt/lists/*
 ---> Using cache
 ---> ef83f7c7d9bc
Step 4/53 : RUN echo "en_US.UTF-8 UTF-8" > /etc/locale.gen &&     locale-gen
 ---> Using cache
 ---> 796c2774b0e4
Step 5/53 : ENV LC_ALL en_US.UTF-8
 ---> Using cache
 ---> c19b4d807a80
Step 6/53 : ENV LANG en_US.UTF-8
 ---> Using cache
 ---> 8a9a285ceb8d
Step 7/53 : ENV LANGUAGE en_US.UTF-8
 ---> Using cache
 ---> 207182a8cf48
Step 8/53 : ENV SHELL /bin/bash
 ---> Using cache
 ---> cb8c24a0df89
Step 9/53 : ARG NB_USER
 ---> Using cache
 ---> 3d5dbb21472e
Step 10/53 : ARG NB_UID
 ---> Using cache
 ---> eb272c03bac7
Step 11/53 : ENV USER ${NB_USER}
 ---> Using cache
 ---> 605f6daca236
Step 12/53 : ENV HOME /home/${NB_USER}
 ---> Using cache
 ---> 968e3deecb51
Step 13/53 : RUN groupadd         --gid ${NB_UID}         ${NB_USER} &&     useradd         --comment "Default user"         --create-home         --gid ${NB_UID}         --no-log-init         --shell /bin/bash         --uid ${NB_UID}         ${NB_USER}
 ---> Using cache
 ---> 9b9973ee9acb
Step 14/53 : RUN apt-get -qq update &&     apt-get -qq install --yes --no-install-recommends        less        unzip        > /dev/null &&     apt-get -qq purge &&     apt-get -qq clean &&     rm -rf /var/lib/apt/lists/*
 ---> Using cache
 ---> 7ad7b7e65c17
Step 15/53 : EXPOSE 8888
 ---> Using cache
 ---> 1a717657346b
Step 16/53 : ENV APP_BASE /srv
 ---> Using cache
 ---> 01295c0331cc
Step 17/53 : ENV CONDA_DIR ${APP_BASE}/conda
 ---> Using cache
 ---> 1a8a04f8ad03
Step 18/53 : ENV NB_PYTHON_PREFIX ${CONDA_DIR}/envs/notebook
 ---> Using cache
 ---> f42d7b06d38f
Step 19/53 : ENV NPM_DIR ${APP_BASE}/npm
 ---> Using cache
 ---> ca82bd3e68e7
Step 20/53 : ENV NPM_CONFIG_GLOBALCONFIG ${NPM_DIR}/npmrc
 ---> Using cache
 ---> 0e2e48467abc
Step 21/53 : ENV NB_ENVIRONMENT_FILE /tmp/env/environment.lock
 ---> Using cache
 ---> bf70ac6ddeeb
Step 22/53 : ENV MAMBA_ROOT_PREFIX ${CONDA_DIR}
 ---> Using cache
 ---> 3e9e77944bec
Step 23/53 : ENV MAMBA_EXE ${CONDA_DIR}/bin/mamba
 ---> Using cache
 ---> 68f79ca1ea86
Step 24/53 : ENV KERNEL_PYTHON_PREFIX ${NB_PYTHON_PREFIX}
 ---> Using cache
 ---> cc804c0192cf
Step 25/53 : ENV PATH ${NB_PYTHON_PREFIX}/bin:${CONDA_DIR}/bin:${NPM_DIR}/bin:${PATH}
 ---> Using cache
 ---> 18abf87722a2
Step 26/53 : COPY --chown=1000:1000 build_script_files/-2fusr-2flib-2fpython3-2e8-2fsite-2dpackages-2frepo2docker-2fbuildpacks-2fconda-2factivate-2dconda-2esh-391af5 /etc/profile.d/activate-conda.sh
 ---> Using cache
 ---> 408348028ee9
Step 27/53 : COPY --chown=1000:1000 build_script_files/-2fusr-2flib-2fpython3-2e8-2fsite-2dpackages-2frepo2docker-2fbuildpacks-2fconda-2fenvironment-2epy-2d3-2e7-2elock-4f1154 /tmp/env/environment.lock
 ---> Using cache
 ---> de1e2e1165be
Step 28/53 : COPY --chown=1000:1000 build_script_files/-2fusr-2flib-2fpython3-2e8-2fsite-2dpackages-2frepo2docker-2fbuildpacks-2fconda-2finstall-2dbase-2denv-2ebash-8fbb20 /tmp/install-base-env.bash
 ---> Using cache
 ---> 9e0c1df4b198
Step 29/53 : RUN TIMEFORMAT='time: %3R' bash -c 'time /tmp/install-base-env.bash' && rm -rf /tmp/install-base-env.bash /tmp/env
 ---> Using cache
 ---> 1bd3ede56786
Step 30/53 : RUN mkdir -p ${NPM_DIR} && chown -R ${NB_USER}:${NB_USER} ${NPM_DIR}
 ---> Using cache
 ---> 8cf914de058a
Step 31/53 : USER root
 ---> Using cache
 ---> 0ca1c52b39da
Step 32/53 : ARG REPO_DIR=${HOME}
 ---> Using cache
 ---> 5f1f115a9aa1
Step 33/53 : ENV REPO_DIR ${REPO_DIR}
 ---> Using cache
 ---> daeacca308e4
Step 34/53 : WORKDIR ${REPO_DIR}
 ---> Using cache
 ---> b07fa9eb4d78
Step 35/53 : RUN chown ${NB_USER}:${NB_USER} ${REPO_DIR}
 ---> Using cache
 ---> 795035454d86
Step 36/53 : ENV PATH ${HOME}/.local/bin:${REPO_DIR}/.local/bin:${PATH}
 ---> Using cache
 ---> 64e4ff472d57
Step 37/53 : ENV CONDA_DEFAULT_ENV ${KERNEL_PYTHON_PREFIX}
 ---> Using cache
 ---> 9d78dd212841
Step 38/53 : COPY --chown=1000:1000 src/binder/requirements.txt ${REPO_DIR}/binder/requirements.txt
 ---> da0283ba1cc3
Step 39/53 : USER ${NB_USER}
 ---> Running in 593f82b010f1
Removing intermediate container 593f82b010f1
 ---> 1e1367c48400
Step 40/53 : RUN ${KERNEL_PYTHON_PREFIX}/bin/pip install --no-cache-dir -r "binder/requirements.txt"
 ---> Running in 5aa110e26ab0
Collecting poliastro
  Cloning https://github.com/poliastro/poliastro.git to /tmp/pip-install-3iywrtmd/poliastro_116f4b4abcb04a3894c87010060502af
�[91m  Running command git clone --filter=blob:none -q https://github.com/poliastro/poliastro.git /tmp/pip-install-3iywrtmd/poliastro_116f4b4abcb04a3894c87010060502af
�[0m  Resolved https://github.com/poliastro/poliastro.git to commit da11159b8d00e56125ecff741d683dd06dcd8be8
  Installing build dependencies: started
  Installing build dependencies: finished with status 'done'
  Getting requirements to build wheel: started
  Getting requirements to build wheel: finished with status 'done'
  Preparing metadata (pyproject.toml): started
  Preparing metadata (pyproject.toml): finished with status 'done'
Collecting jupytext>=1.13.3
  Downloading jupytext-1.13.6-py3-none-any.whl (297 kB)
Collecting pyerfa
  Downloading pyerfa-2.0.0.1-cp37-cp37m-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl (746 kB)
Collecting matplotlib!=3.0.1,>=2.0
  Downloading matplotlib-3.5.1-cp37-cp37m-manylinux_2_5_x86_64.manylinux1_x86_64.whl (11.2 MB)
Collecting astroquery>=0.3.9
  Downloading astroquery-0.4.5-py3-none-any.whl (4.5 MB)
Collecting jplephem
  Downloading jplephem-2.17.tar.gz (40 kB)
  Preparing metadata (setup.py): started
  Preparing metadata (setup.py): finished with status 'done'
Collecting numba>=0.46
  Downloading numba-0.55.1-1-cp37-cp37m-manylinux2014_x86_64.manylinux_2_17_x86_64.whl (3.3 MB)
Collecting numpy
  Downloading numpy-1.21.5-cp37-cp37m-manylinux_2_12_x86_64.manylinux2010_x86_64.whl (15.7 MB)
Collecting cached_property
  Downloading cached_property-1.5.2-py2.py3-none-any.whl (7.6 kB)
Collecting pandas
  Downloading pandas-1.3.5-cp37-cp37m-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (11.3 MB)
Collecting plotly<6,>=4.0
  Downloading plotly-5.5.0-py2.py3-none-any.whl (26.5 MB)
Collecting scipy>=1.4.0
  Downloading scipy-1.7.3-cp37-cp37m-manylinux_2_12_x86_64.manylinux2010_x86_64.whl (38.1 MB)
�[91mERROR: Could not find a version that satisfies the requirement astropy<6,>=5.0 (from poliastro) (from versions: 0.1, 0.2, 0.2.1, 0.2.2, 0.2.3, 0.2.4, 0.2.5, 0.3, 0.3.1, 0.3.2, 0.4rc1, 0.4rc2, 0.4, 0.4.1, 0.4.2, 0.4.3, 0.4.4, 0.4.5, 0.4.6, 1.0rc1, 1.0rc2, 1.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7, 1.0.8, 1.0.9, 1.0.10, 1.0.11, 1.0.12, 1.0.13, 1.1b1, 1.1rc1, 1.1rc2, 1.1, 1.1.post1, 1.1.post2, 1.1.1, 1.1.2, 1.2rc1, 1.2, 1.2.1, 1.2.2, 1.3rc1, 1.3, 1.3.1, 1.3.2, 1.3.3, 2.0rc1, 2.0, 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.0.5, 2.0.6, 2.0.7, 2.0.8, 2.0.9, 2.0.10, 2.0.11, 2.0.12, 2.0.13, 2.0.14, 2.0.15, 2.0.16, 3.0rc1, 3.0rc2, 3.0, 3.0.1, 3.0.2, 3.0.3, 3.0.4, 3.0.5, 3.1rc1, 3.1rc2, 3.1, 3.1.1, 3.1.2, 3.2rc1, 3.2rc2, 3.2, 3.2.1, 3.2.2, 3.2.3, 4.0rc1, 4.0rc2, 4.0, 4.0.1, 4.0.1.post1, 4.0.2, 4.0.3, 4.0.4, 4.0.5, 4.0.6.dev27461, 4.0.6, 4.1rc1, 4.1rc2, 4.1, 4.2rc1, 4.2, 4.2.1, 4.3rc1, 4.3, 4.3.post1, 4.3.1)
�[0m�[91mERROR: No matching distribution found for astropy<6,>=5.0
�[0mRemoving intermediate container 5aa110e26ab0
The command '/bin/sh -c ${KERNEL_PYTHON_PREFIX}/bin/pip install --no-cache-dir -r "binder/requirements.txt"' returned a non-zero code: 1Built image, launching...
Failed to connect to event stream

The reason is that Binder is using Python 3.7, which is not supported anymore.

(Discovered by @Yash-10 )

In principle, according to the documentation, the fix is as simple as a binder/runtime.txt file with the contents python-3.10 (so Binder uses the latest supported version of Python).

[astrojuanlu]

cc @manweichan in case you want to give this a shot :)

[astrojuanlu]

@LuisGMM is working on this, he found a possible bug along the way jupyterhub/mybinder.org-user-guide#253 so we will probably switch to conda environment.yml for Binder.

[astrojuanlu]

Fixed in #1465