Require Python 3.9 to run repo2docker

.github/workflows/docker.yml

@@ -29,7 +29,7 @@ on:
 
 jobs:
   docker:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout code
         uses: actions/checkout@v4

.github/workflows/release.yml

@@ -29,12 +29,12 @@ on:
 
 jobs:
   build-n-publish:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.9"
+          python-version: "3.13"
 
       - name: install build requirements
         run: |
@@ -62,7 +62,7 @@ jobs:
           password: ${{ secrets.PYPI_PASSWORD }}
 
   publish-docker:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     env:
       DEFAULT_REGISTRY: quay.io
       IMAGE_NAME: jupyterhub/repo2docker

.github/workflows/test.yml

@@ -50,8 +50,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ubuntu_version: ["22.04"]
-        python_version: ["3.9"]
+        ubuntu_version: ["24.04"]
+        python_version: ["3.13"]
         repo_type:
           - base
           - conda
@@ -64,17 +64,13 @@ jobs:
           - unit
           - venv
           - contentproviders
+          # Playwright test
+          - ui
         include:
-          # The actions/setup-python action with Python version 3.6 isn't
-          # possible to use with the ubuntu-22.04 runner, so we use ubuntu-20.04
-          # for this test where Python 3.6 remain available.
-          - ubuntu_version: "20.04"
-            python_version: "3.6"
+          # The earliest actions/setup-python versions depend on the runner.
+          - ubuntu_version: "22.04"
+            python_version: "3.9"
             repo_type: venv
-          # Playwright test
-          - ubuntu_version: "24.04"
-            python_version: "3.13"
-            repo_type: ui
 
     steps:
       - uses: actions/checkout@v4

.pre-commit-config.yaml

@@ -15,10 +15,10 @@ repos:
     hooks:
       - id: pyupgrade
         args:
-          - --py36-plus
+          - --py38-plus
         # check-tmp is a Python based test script run in created environments
-        # that can be at least Python 3.5 even though we require Python 3.6 for
-        # repo2docker itself.
+        # that can be Python 3.5, older than the Python version required to run
+        # repo2docker.
         exclude: check-tmp
 
   # Autoformat: Python code
@@ -27,12 +27,11 @@ repos:
     hooks:
       - id: black
         args:
-          - --target-version=py36
-          - --target-version=py37
-          - --target-version=py38
           - --target-version=py39
           - --target-version=py310
           - --target-version=py311
+          - --target-version=py312
+          - --target-version=py313
 
   # Autoformat: Python code
   - repo: https://github.com/pycqa/isort

README.md

@@ -36,7 +36,7 @@ For more information, please visit
 
 1. Docker to build & run the repositories. The [community edition](https://store.docker.com/search?type=edition&offering=community)
    is recommended.
-2. Python 3.6+.
+2. Python 3.9+.
 
 Supported on Linux and macOS. [See documentation note about Windows support.](http://repo2docker.readthedocs.io/en/latest/install.html#note-about-windows-support)
 

repo2docker/buildpacks/base.py

@@ -236,7 +236,7 @@ def __init__(self, base_image):
             )
         self.platform = ""
 
-    @lru_cache()
+    @lru_cache
     def get_packages(self):
         """
         List of packages that are installed in this BuildPack.
@@ -246,7 +246,7 @@ def get_packages(self):
         """
         return set()
 
-    @lru_cache()
+    @lru_cache
     def get_base_packages(self):
         """
         Base set of apt packages that are installed for all images.
@@ -265,7 +265,7 @@ def get_base_packages(self):
             "gettext-base",
         }
 
-    @lru_cache()
+    @lru_cache
     def get_build_env(self):
         """
         Ordered list of environment variables to be set for this image.
@@ -281,7 +281,7 @@ def get_build_env(self):
         """
         return []
 
-    @lru_cache()
+    @lru_cache
     def get_env(self):
         """
         Ordered list of environment variables to be set for this image.
@@ -296,7 +296,7 @@ def get_env(self):
         """
         return []
 
-    @lru_cache()
+    @lru_cache
     def get_path(self):
         """
         Ordered list of file system paths to look for executables in.
@@ -306,14 +306,14 @@ def get_path(self):
         """
         return []
 
-    @lru_cache()
+    @lru_cache
     def get_labels(self):
         """
         Docker labels to set on the built image.
         """
         return self.labels
 
-    @lru_cache()
+    @lru_cache
     def get_build_script_files(self):
         """
         Dict of files to be copied to the container image for use in building.
@@ -338,7 +338,7 @@ def _check_stencila(self):
                     f"Found a stencila manifest.xml at {root}. Stencila is no longer supported."
                 )
 
-    @lru_cache()
+    @lru_cache
     def get_build_scripts(self):
         """
         Ordered list of shell script snippets to build the base image.
@@ -360,7 +360,7 @@ def get_build_scripts(self):
 
         return []
 
-    @lru_cache()
+    @lru_cache
     def get_preassemble_script_files(self):
         """
         Dict of files to be copied to the container image for use in preassembly.
@@ -374,7 +374,7 @@ def get_preassemble_script_files(self):
         """
         return {}
 
-    @lru_cache()
+    @lru_cache
     def get_preassemble_scripts(self):
         """
         Ordered list of shell snippets to build an image for this repository.
@@ -391,7 +391,7 @@ def get_preassemble_scripts(self):
         """
         return []
 
-    @lru_cache()
+    @lru_cache
     def get_assemble_scripts(self):
         """
         Ordered list of shell script snippets to build the repo into the image.
@@ -418,7 +418,7 @@ def get_assemble_scripts(self):
         """
         return []
 
-    @lru_cache()
+    @lru_cache
     def get_post_build_scripts(self):
         """
         An ordered list of executable scripts to execute after build.
@@ -431,7 +431,7 @@ def get_post_build_scripts(self):
         """
         return []
 
-    @lru_cache()
+    @lru_cache
     def get_start_script(self):
         """
         The path to a script to be executed at container start up.
@@ -672,22 +672,22 @@ def _filter_tar(tarinfo):
 
 
 class BaseImage(BuildPack):
-    @lru_cache()
+    @lru_cache
     def get_build_env(self):
         """Return env directives required for build"""
         return [
             ("APP_BASE", "/srv"),
         ]
 
-    @lru_cache()
+    @lru_cache
     def get_env(self):
         """Return env directives to be set after build"""
         return []
 
     def detect(self):
         return True
 
-    @lru_cache()
+    @lru_cache
     def get_preassemble_scripts(self):
         scripts = []
         try:
@@ -727,19 +727,19 @@ def get_preassemble_scripts(self):
 
         return scripts
 
-    @lru_cache()
+    @lru_cache
     def get_assemble_scripts(self):
         """Return directives to run after the entire repository has been added to the image"""
         return []
 
-    @lru_cache()
+    @lru_cache
     def get_post_build_scripts(self):
         post_build = self.binder_path("postBuild")
         if os.path.exists(post_build):
             return [post_build]
         return []
 
-    @lru_cache()
+    @lru_cache
     def get_start_script(self):
         start = self.binder_path("start")
         if os.path.exists(start):

repo2docker/buildpacks/conda/__init__.py

@@ -46,7 +46,7 @@ def _conda_platform(self):
             return "linux-aarch64"
         raise ValueError(f"Unknown platform {self.platform}")
 
-    @lru_cache()
+    @lru_cache
     def get_build_env(self):
         """Return environment variables to be set.
 
@@ -90,13 +90,13 @@ def get_build_env(self):
             env.append(("KERNEL_PYTHON_PREFIX", "${NB_PYTHON_PREFIX}"))
         return env
 
-    @lru_cache()
+    @lru_cache
     def get_env(self):
         """Make kernel env the default for `conda install`"""
         env = super().get_env() + [("CONDA_DEFAULT_ENV", "${KERNEL_PYTHON_PREFIX}")]
         return env
 
-    @lru_cache()
+    @lru_cache
     def get_path(self):
         """Return paths (including conda environment path) to be added to
         the PATH environment variable.
@@ -111,7 +111,7 @@ def get_path(self):
         path.append("${NPM_DIR}/bin")
         return path
 
-    @lru_cache()
+    @lru_cache
     def get_build_scripts(self):
         """
         Return series of build-steps common to all Python 3 repositories.
@@ -149,7 +149,7 @@ def get_build_scripts(self):
 
     major_pythons = {"2": "2.7", "3": "3.10"}
 
-    @lru_cache()
+    @lru_cache
     def get_build_script_files(self):
         """
         Dict of files to be copied to the container image for use in building.
@@ -374,7 +374,7 @@ def separate_kernel_env(self):
             self.kernel_env_cutoff_version
         )
 
-    @lru_cache()
+    @lru_cache
     def get_preassemble_script_files(self):
         """preassembly only requires environment.yml
 
@@ -388,7 +388,7 @@ def get_preassemble_script_files(self):
                 assemble_files[environment_yml] = environment_yml
         return assemble_files
 
-    @lru_cache()
+    @lru_cache
     def get_env_scripts(self):
         """Return series of build-steps specific to this source repository."""
         scripts = []
@@ -455,14 +455,14 @@ def get_env_scripts(self):
             ]
         return scripts
 
-    @lru_cache()
+    @lru_cache
     def get_preassemble_scripts(self):
         scripts = super().get_preassemble_scripts()
         if self._should_preassemble_env:
             scripts.extend(self.get_env_scripts())
         return scripts
 
-    @lru_cache()
+    @lru_cache
     def get_assemble_scripts(self):
         scripts = super().get_assemble_scripts()
         if not self._should_preassemble_env:

repo2docker/buildpacks/julia/julia_project.py

@@ -69,7 +69,7 @@ def julia_version(self):
             raise RuntimeError("Failed to find a matching Julia version: {compat}")
         return match
 
-    @lru_cache()
+    @lru_cache
     def get_build_env(self):
         """Get additional environment settings for Julia and Jupyter
 
@@ -112,11 +112,11 @@ def project_dir(self):
         else:
             return "${REPO_DIR}"
 
-    @lru_cache()
+    @lru_cache
     def get_env(self):
         return super().get_env() + [("JULIA_PROJECT", self.project_dir)]
 
-    @lru_cache()
+    @lru_cache
     def get_path(self):
         """Adds path to Julia binaries to user's PATH.
 
@@ -127,7 +127,7 @@ def get_path(self):
         """
         return super().get_path() + ["${JULIA_PATH}/bin"]
 
-    @lru_cache()
+    @lru_cache
     def get_build_scripts(self):
         """
         Return series of build-steps common to "ALL" Julia repositories
@@ -156,7 +156,7 @@ def get_build_scripts(self):
             ),
         ]
 
-    @lru_cache()
+    @lru_cache
     def get_assemble_scripts(self):
         """
         Return series of build-steps specific to "this" Julia repository