Remove unspecified Python version case

- removes lockfile copies without version
- enforces that `buildpack.python_version` is always specified (major_pythons['3'] in cases where it could have been falsy before)
- warns when Python version is unspecified, which ensures future reproducibility failures

repo2docker/buildpacks/conda/__init__.py

@@ -165,49 +165,54 @@ class CondaBuildPack(BaseImage):
             "conda/activate-conda.sh": "/etc/profile.d/activate-conda.sh",
         }
         py_version = self.python_version
+        if not py_version or len(py_version.split(".")) != 2:
+            raise ValueError(
+                f"{self.__class__.__name__}.python_version must always be specified as 'x.y', e.g. '3.10', got {py_version}."
+            )
         self.log.info(f"Building conda environment for python={py_version}\n")
         # Select the frozen base environment based on Python version.
         # avoids expensive and possibly conflicting upgrades when changing
         # major Python versions during upgrade.
-        # If no version is specified or no matching X.Y version is found,
+        conda_platform = self._conda_platform()
-        # the default base environment is used.
-        frozen_name = f"environment-{self._conda_platform()}.lock"
-        pip_frozen_name = "requirements.txt"
-        if py_version:
-            conda_platform = self._conda_platform()
-            if self.separate_kernel_env:
-                self.log.warning(
-                    f"User-requested packages for legacy Python version {py_version} will be installed in a separate kernel environment.\n"
-                )
-                lockfile_name = f"environment.py-{py_version}-{conda_platform}.lock"
-                if not os.path.exists(os.path.join(HERE, lockfile_name)):
-                    raise ValueError(
-                        f"Python version {py_version} on {conda_platform} is not supported!"
-                    )
-                files[
-                    f"conda/{lockfile_name}"
-                ] = self._kernel_environment_file = "/tmp/env/kernel-environment.lock"
 
-                requirements_file_name = f"requirements.py-{py_version}.pip"
+        if self.separate_kernel_env:
-                if os.path.exists(os.path.join(HERE, requirements_file_name)):
+            # setup kernel environment (separate from server)
-                    files[
+            # server runs with default env
-                        f"conda/{requirements_file_name}"
+            server_py_version = self.major_pythons["3"]
-                    ] = (
+            self.log.warning(
-                        self._kernel_requirements_file
+                f"User-requested packages for legacy Python version {py_version} will be installed in a separate kernel environment in $KERNEL_PYTHON_PREFIX.\n"
-                    ) = "/tmp/env/kernel-requirements.txt"
+                f"Jupyter Server will run with {server_py_version} in $NB_PYTHON_PREFIX.\n"
-            else:
+            )
-                py_frozen_name = (
+            lockfile_name = f"environment.py-{py_version}-{conda_platform}.lock"
-                    f"environment.py-{py_version}-{self._conda_platform()}.lock"
+            if not os.path.exists(os.path.join(HERE, lockfile_name)):
+                raise ValueError(
+                    f"Python version {py_version} on {conda_platform} is not supported!"
                 )
-                if os.path.exists(os.path.join(HERE, py_frozen_name)):
+            files[
-                    frozen_name = py_frozen_name
+                f"conda/{lockfile_name}"
-                    pip_frozen_name = f"requirements.py-{py_version}.pip"
+            ] = self._kernel_environment_file = "/tmp/env/kernel-environment.lock"
-                else:
+
-                    raise ValueError(
+            requirements_file_name = f"requirements.py-{py_version}.pip"
-                        f"Python version {py_version} {self._conda_platform()} is not supported!"
+            if os.path.exists(os.path.join(HERE, requirements_file_name)):
-                    )
+                files[
+                    f"conda/{requirements_file_name}"
+                ] = self._kernel_requirements_file = "/tmp/env/kernel-requirements.txt"
+        else:
+            # server and kernel are the same
+            server_py_version = py_version
+
+        # setup the server Python environment
+        conda_frozen_name = f"environment.py-{server_py_version}-{conda_platform}.lock"
+        pip_frozen_name = f"requirements.py-{server_py_version}.pip"
+
+        if not os.path.exists(os.path.join(HERE, conda_frozen_name)):
+            # no env, not supported
+            raise ValueError(
+                f"Python version {server_py_version} on {conda_platform} is not supported!"
+            )
+
         files[
-            "conda/" + frozen_name
+            "conda/" + conda_frozen_name
         ] = self._nb_environment_file = "/tmp/env/environment.lock"
 
         # add requirements.txt, if present
@@ -267,8 +272,9 @@ class CondaBuildPack(BaseImage):
     def python_version(self):
         """Detect the Python version for a given `environment.yml`
 
-        Will return 'x.y' if version is found (e.g '3.6'),
+        Will always return an `x.y` version.
-        or a Falsy empty string '' if not found.
+        If no version is found, the default Python version is used,
+        via self.major_pythons['3'].
 
         Version information below the minor level is dropped.
         """
@@ -286,13 +292,17 @@ class CondaBuildPack(BaseImage):
 
             # extract major.minor
             if py_version:
-                if len(py_version) == 1:
+                py_version_info = py_version.split(".")
-                    self._python_version = self.major_pythons.get(py_version[0])
+                if len(py_version_info) == 1:
+                    self._python_version = self.major_pythons[py_version_info[0]]
                 else:
                     # return major.minor
-                    self._python_version = ".".join(py_version.split(".")[:2])
+                    self._python_version = ".".join(py_version_info[:2])
             else:
-                self._python_version = ""
+                self._python_version = self.major_pythons["3"]
+                self.log.warning(
+                    f"Python version unspecified, using current default Python version {self._python_version}. This will change in the future."
+                )
 
         return self._python_version
 

repo2docker/buildpacks/conda/environment-linux-64.lock

@@ -1,150 +0,0 @@
-# AUTO GENERATED FROM environment.py-3.10.yml, DO NOT MANUALLY MODIFY
-# Frozen on 2023-02-03 12:34:24 UTC
-# Generated by conda-lock.
-# platform: linux-64
-# input_hash: 9fd16b0f6d64e86a62e326694b74a429aef5dd7b227a96b4f0e2425851e4e016
-@EXPLICIT
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-https://conda.anaconda.org/conda-forge/linux-64/ld_impl_linux-64-2.40-h41732ed_0.conda#7aca3059a1729aa76c597603f10b0dd3
-https://conda.anaconda.org/conda-forge/linux-64/libstdcxx-ng-12.2.0-h46fd767_19.tar.bz2#1030b1f38c129f2634eae026f704fe60
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-https://conda.anaconda.org/conda-forge/noarch/sniffio-1.3.0-pyhd8ed1ab_0.tar.bz2#dd6cbc539e74cb1f430efbd4575b9303
-https://conda.anaconda.org/conda-forge/noarch/soupsieve-2.3.2.post1-pyhd8ed1ab_0.tar.bz2#146f4541d643d48fc8a75cacf69f03ae
-https://conda.anaconda.org/conda-forge/noarch/tomli-2.0.1-pyhd8ed1ab_0.tar.bz2#5844808ffab9ebdb694585b50ba02a96
-https://conda.anaconda.org/conda-forge/linux-aarch64/tornado-6.2-py310hdc54845_1.tar.bz2#343c5468b69f14f4009cfcf8ae286f98
-https://conda.anaconda.org/conda-forge/noarch/traitlets-5.9.0-pyhd8ed1ab_0.conda#d0b4f5c87cd35ac3fb3d47b223263a64
-https://conda.anaconda.org/conda-forge/noarch/typing_extensions-4.4.0-pyha770c72_0.tar.bz2#2d93b130d148d7fc77e583677792fc6a
-https://conda.anaconda.org/conda-forge/noarch/webencodings-0.5.1-py_1.tar.bz2#3563be4c5611a44210d9ba0c16113136
-https://conda.anaconda.org/conda-forge/noarch/websocket-client-1.5.0-pyhd8ed1ab_0.conda#6df990e93f39e91a3f45d4d885404d56
-https://conda.anaconda.org/conda-forge/noarch/wheel-0.38.4-pyhd8ed1ab_0.tar.bz2#c829cfb8cb826acb9de0ac1a2df0a940
-https://conda.anaconda.org/conda-forge/noarch/widgetsnbextension-4.0.5-pyhd8ed1ab_0.conda#2af53b3894fb9bdbb3679c0d31028b1b
-https://conda.anaconda.org/conda-forge/noarch/zipp-3.12.0-pyhd8ed1ab_0.conda#edc3568566cc48335f0b5d86d40fdbb9
-https://conda.anaconda.org/conda-forge/noarch/anyio-3.6.2-pyhd8ed1ab_0.tar.bz2#8ada050fa88f26916fc1e76e368a49fd
-https://conda.anaconda.org/conda-forge/noarch/asttokens-2.2.1-pyhd8ed1ab_0.conda#bf7f54dd0f25c3f06ecb82a07341841a
-https://conda.anaconda.org/conda-forge/noarch/babel-2.11.0-pyhd8ed1ab_0.tar.bz2#2ea70fde8d581ba9425a761609eed6ba
-https://conda.anaconda.org/conda-forge/noarch/backports.functools_lru_cache-1.6.4-pyhd8ed1ab_0.tar.bz2#c5b3edc62d6309088f4970b3eaaa65a6
-https://conda.anaconda.org/conda-forge/noarch/beautifulsoup4-4.11.2-pyha770c72_0.conda#88b59f6989f0ed5ab3433af0b82555e1
-https://conda.anaconda.org/conda-forge/noarch/bleach-6.0.0-pyhd8ed1ab_0.conda#d48b143d01385872a88ef8417e96c30e
-https://conda.anaconda.org/conda-forge/linux-aarch64/cffi-1.15.1-py310hf0c4615_3.conda#a2bedcb1d205485ea32fe5d2bd6fd970
-https://conda.anaconda.org/conda-forge/noarch/comm-0.1.2-pyhd8ed1ab_0.conda#3c78af4752bb1600ebe5e83ef4588eaa
-https://conda.anaconda.org/conda-forge/noarch/importlib-metadata-6.0.0-pyha770c72_0.conda#691644becbcdca9f73243450b1c63e62
-https://conda.anaconda.org/conda-forge/noarch/importlib_resources-5.10.2-pyhd8ed1ab_0.conda#de76905f801c22fc43e624058574eab3
-https://conda.anaconda.org/conda-forge/noarch/jedi-0.18.2-pyhd8ed1ab_0.conda#b5e695ef9c3f0d27d6cd96bf5adc9e07
-https://conda.anaconda.org/conda-forge/noarch/jinja2-3.1.2-pyhd8ed1ab_1.tar.bz2#c8490ed5c70966d232fdd389d0dbed37
-https://conda.anaconda.org/conda-forge/noarch/matplotlib-inline-0.1.6-pyhd8ed1ab_0.tar.bz2#b21613793fcc81d944c76c9f2864a7de
-https://conda.anaconda.org/conda-forge/noarch/pexpect-4.8.0-pyh1a96a4e_2.tar.bz2#330448ce4403cc74990ac07c555942a1
-https://conda.anaconda.org/conda-forge/noarch/pip-23.0-pyhd8ed1ab_0.conda#85b35999162ec95f9f999bac15279c02
-https://conda.anaconda.org/conda-forge/noarch/pygments-2.14.0-pyhd8ed1ab_0.conda#c78cd16b11cd6a295484bd6c8f24bea1
-https://conda.anaconda.org/conda-forge/noarch/python-dateutil-2.8.2-pyhd8ed1ab_0.tar.bz2#dd999d1cc9f79e67dbb855c8924c7984
-https://conda.anaconda.org/conda-forge/linux-aarch64/ruamel.yaml-0.17.21-py310h761cc84_2.tar.bz2#98c0b13f20fcb4f5080554d137e39b37
-https://conda.anaconda.org/conda-forge/noarch/terminado-0.17.1-pyh41d4057_0.conda#3788984d535770cad699efaeb6cb3037
-https://conda.anaconda.org/conda-forge/noarch/tinycss2-1.2.1-pyhd8ed1ab_0.tar.bz2#7234c9eefff659501cd2fe0d2ede4d48
-https://conda.anaconda.org/conda-forge/noarch/typing-extensions-4.4.0-hd8ed1ab_0.tar.bz2#be969210b61b897775a0de63cd9e9026
-https://conda.anaconda.org/conda-forge/linux-aarch64/argon2-cffi-bindings-21.2.0-py310h761cc84_3.tar.bz2#bba0e5198226ac75f17857b43483d054
-https://conda.anaconda.org/conda-forge/linux-aarch64/brotlipy-0.7.0-py310h761cc84_1005.tar.bz2#66934993368d01f896652925d3ac7e66
-https://conda.anaconda.org/conda-forge/linux-aarch64/cryptography-39.0.0-py310he4ba0b1_0.conda#fac36b7b925b4661f56d67d54578c28e
-https://conda.anaconda.org/conda-forge/noarch/importlib_metadata-6.0.0-hd8ed1ab_0.conda#a67d43e1527a37199dd8db913366f68e
-https://conda.anaconda.org/conda-forge/noarch/jsonschema-4.17.3-pyhd8ed1ab_0.conda#723268a468177cd44568eb8f794e0d80
-https://conda.anaconda.org/conda-forge/noarch/jupyterlab_pygments-0.2.2-pyhd8ed1ab_0.tar.bz2#243f63592c8e449f40cd42eb5cf32f40
-https://conda.anaconda.org/conda-forge/noarch/mako-1.2.4-pyhd8ed1ab_0.tar.bz2#0d072f0edc017b6318dbab701e053f94
-https://conda.anaconda.org/conda-forge/noarch/platformdirs-2.6.2-pyhd8ed1ab_0.conda#0b4cc3f8181b0d8446eb5387d7848a54
-https://conda.anaconda.org/conda-forge/linux-aarch64/sqlalchemy-2.0.1-py310h734f5e8_0.conda#1a4c6b08354b1f988b87ee363fe72767
-https://conda.anaconda.org/conda-forge/noarch/stack_data-0.6.2-pyhd8ed1ab_0.conda#e7df0fdd404616638df5ece6e69ba7af
-https://conda.anaconda.org/conda-forge/noarch/wcwidth-0.2.6-pyhd8ed1ab_0.conda#078979d33523cb477bd1916ce41aacc9
-https://conda.anaconda.org/conda-forge/noarch/alembic-1.9.1-pyhd8ed1ab_0.conda#5519188d282629ce4fef73eb87285cbe
-https://conda.anaconda.org/conda-forge/noarch/argon2-cffi-21.3.0-pyhd8ed1ab_0.tar.bz2#a0b402db58f73aaab8ee0ca1025a362e
-https://conda.anaconda.org/conda-forge/linux-aarch64/jupyter_core-5.2.0-py310h4c7bcd0_0.conda#27c243e89c335ad7f5c43da8579abcc2
-https://conda.anaconda.org/conda-forge/noarch/jupyter_telemetry-0.1.0-pyhd8ed1ab_1.tar.bz2#bb9ebdb6d5aa2622484aff1faceee181
-https://conda.anaconda.org/conda-forge/noarch/oauthlib-3.2.2-pyhd8ed1ab_0.tar.bz2#8f882b197fd9c4941a787926baea4868
-https://conda.anaconda.org/conda-forge/noarch/prompt-toolkit-3.0.36-pyha770c72_0.conda#4d79ec192e0bfd530a254006d123b9a6
-https://conda.anaconda.org/conda-forge/noarch/pyopenssl-23.0.0-pyhd8ed1ab_0.conda#d41957700e83bbb925928764cb7f8878
-https://conda.anaconda.org/conda-forge/noarch/certipy-0.1.3-py_0.tar.bz2#23486713ef5712923e7c57cae609b22e
-https://conda.anaconda.org/conda-forge/noarch/ipython-8.9.0-pyh41d4057_0.conda#399217b9b00e59e990585576eeca3dde
-https://conda.anaconda.org/conda-forge/noarch/jupyter_client-8.0.2-pyhd8ed1ab_0.conda#cbb8d182b6053ce14b5fe60ef1e36fbb
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-https://conda.anaconda.org/conda-forge/noarch/ipykernel-6.21.1-pyh210e3f2_0.conda#225e7869419b8bcae5d3165eba50204d
-https://conda.anaconda.org/conda-forge/noarch/nbclient-0.7.2-pyhd8ed1ab_0.conda#6c7b0d75b66a220274bb5a28c23197f2
-https://conda.anaconda.org/conda-forge/noarch/requests-2.28.2-pyhd8ed1ab_0.conda#11d178fc55199482ee48d6812ea83983
-https://conda.anaconda.org/conda-forge/noarch/ipywidgets-8.0.2-pyhd8ed1ab_1.tar.bz2#81b7f46918555bf911ad2ba2f3259094
-https://conda.anaconda.org/conda-forge/noarch/jupyterhub-base-3.1.1-pyh2a2186d_0.conda#78fc5dfd4577a7ba172fa65eb64b6afb
-https://conda.anaconda.org/conda-forge/noarch/nbconvert-core-7.2.9-pyhd8ed1ab_0.conda#a9e1826152e79416db71c51b0d3af28c
-https://conda.anaconda.org/conda-forge/noarch/jupyter_server-1.23.5-pyhd8ed1ab_0.conda#e3ae1d46749f48a1875b560fca41cb0c
-https://conda.anaconda.org/conda-forge/noarch/nbconvert-pandoc-7.2.9-pyhd8ed1ab_0.conda#4a8dc94c7c2f3736dc4b91ec345d5b4b
-https://conda.anaconda.org/conda-forge/noarch/jupyter-resource-usage-0.7.0-pyhd8ed1ab_0.conda#c57567d49d926826b1f852712ac8acfa
-https://conda.anaconda.org/conda-forge/noarch/jupyterlab_server-2.19.0-pyhd8ed1ab_0.conda#9dc0706ec2f8e13b7a0db9d6a19051ff
-https://conda.anaconda.org/conda-forge/noarch/nbconvert-7.2.9-pyhd8ed1ab_0.conda#523aaa3affb003ab0e68dbc24c9027f4
-https://conda.anaconda.org/conda-forge/noarch/notebook-shim-0.2.2-pyhd8ed1ab_0.tar.bz2#40be846cd4e78672a40e43db9dae753c
-https://conda.anaconda.org/conda-forge/noarch/nbclassic-0.5.1-pyhd8ed1ab_0.conda#cf832e3d48ef22528c676ed6e4b4085a
-https://conda.anaconda.org/conda-forge/noarch/notebook-6.4.12-pyha770c72_0.tar.bz2#77fc67c5bbea44fd41e8bbe2ac82d1ad
-https://conda.anaconda.org/conda-forge/noarch/jupyter-offlinenotebook-0.2.2-pyh1d7be83_0.tar.bz2#fe55056ce4bc4bd4953ba440270735fb
-https://conda.anaconda.org/conda-forge/noarch/jupyterlab-3.4.8-pyhd8ed1ab_0.tar.bz2#6fbf13b0e8a6fa24bbae91205e8ce467
-https://conda.anaconda.org/conda-forge/noarch/nteract_on_jupyter-2.1.3-py_0.tar.bz2#1430ccd983ae6b161e2fbf4377965f7a
-https://conda.anaconda.org/conda-forge/noarch/jupyterhub-singleuser-3.1.1-pyh2a2186d_0.conda#6d0a3394efe9ff7c0ad1ed03a6ca3720

repo2docker/buildpacks/conda/freeze.py

@@ -11,8 +11,6 @@ python freeze.py [3.8]
 
 import os
 import pathlib
-import shutil
-import sys
 from argparse import ArgumentParser
 from datetime import datetime
 from subprocess import check_call
@@ -22,8 +20,6 @@ from ruamel.yaml import YAML
 HERE = pathlib.Path(os.path.dirname(os.path.abspath(__file__)))
 
 ENV_FILE = HERE / "environment.yml"
-FROZEN_FILE_T = os.path.splitext(ENV_FILE)[0] + "-{platform}.lock"
-
 ENV_FILE_T = HERE / "environment.py-{py}.yml"
 
 yaml = YAML(typ="rt")
@@ -126,7 +122,6 @@ if __name__ == "__main__":
         default=("linux-64", "linux-aarch64"),
     )
     args = parser.parse_args()
-    default_py = "3.10"
     for py in args.py:
         for platform in args.platform:
             env_file = pathlib.Path(str(ENV_FILE_T).format(py=py))
@@ -135,5 +130,3 @@ if __name__ == "__main__":
                 os.path.splitext(env_file)[0] + f"-{platform}.lock"
             )
             freeze(env_file, frozen_file, platform)
-            if py == default_py:
-                shutil.copy(frozen_file, FROZEN_FILE_T.format(platform=platform))

repo2docker/buildpacks/pipfile/__init__.py

@@ -64,15 +64,19 @@ class PipfileBuildPack(CondaBuildPack):
 
         # extract major.minor
         if py_version:
-            if len(py_version.split(".")) == 1:
+            py_version_info = py_version.split(".")
-                self._python_version = self.major_pythons.get(py_version[0])
+            if len(py_version_info) == 1:
+                self._python_version = self.major_pythons[py_version_info[0]]
             else:
                 # return major.minor
-                self._python_version = ".".join(py_version.split(".")[:2])
+                self._python_version = ".".join(py_version_info[:2])
             return self._python_version
         else:
             # use the default Python
             self._python_version = self.major_pythons["3"]
+            self.log.warning(
+                f"Python version unspecified, using current default Python version {self._python_version}. This will change in the future."
+            )
             return self._python_version
 
     def get_preassemble_script_files(self):

repo2docker/buildpacks/python/__init__.py

@@ -23,6 +23,9 @@ class PythonBuildPack(CondaBuildPack):
             # not a Python runtime (e.g. R, which subclasses this)
             # use the default Python
             self._python_version = self.major_pythons["3"]
+            self.log.warning(
+                f"Python version unspecified, using current default Python version {self._python_version}. This will change in the future."
+            )
             return self._python_version
 
         py_version_info = runtime.split("-", 1)[1].split(".")

tests/unit/test_env_yml.py

@@ -1,8 +1,6 @@
 """
 Test if the environment.yml is empty or it constains other data structure than a dictionary
 """
-import os
-import sys
 
 import pytest
 
@@ -15,8 +13,8 @@ def test_empty_env_yml(tmpdir):
     p.write("")
     bp = buildpacks.CondaBuildPack()
     py_ver = bp.python_version
-    # If the environment.yml is empty python_version will get an empty string
+    # If the environment.yml is empty, python_version will get the default Python version
-    assert py_ver == ""
+    assert py_ver == bp.major_pythons["3"]
 
 
 def test_no_dict_env_yml(tmpdir):