Handle breaking changes in repo2docker

jupyterhub/repo2docker#1421

Author: manics

.github/workflows/build.yml

@@ -21,6 +21,9 @@ jobs:
         python_version: ["3.9"]
         container_engine:
           - podman
+        repo2docker_version:
+          # Use version in dev-requirements.txt
+          - ""
         repo_type:
           # Only test a subset of the repo2docker tests since we're testing podman,
           # not the full repo2docker functionality
@@ -48,6 +51,10 @@ jobs:
           - python_version: "3.11"
             container_engine: nerdctl
             repo_type: venv/default
+          - python_version: "3.13"
+            container_engine: podman
+            repo_type: base
+            repo2docker_version: e795060aec3555a6203ed79c3676765fb3f3b850
 
     steps:
       - name: Checkout repo
@@ -69,9 +76,16 @@ jobs:
           containerd-rootless-setuptool.sh install
           containerd-rootless-setuptool.sh install-buildkit
 
-      - name: Install
+      - name: Install dependencies
         run: |
           pip install -r dev-requirements.txt
+          if [ -n "${{ matrix.repo2docker_version }}" ]; then
+              pip install git+https://github.com/jupyterhub/repo2docker@${{ matrix.repo2docker_version }}
+          fi
+          pip freeze
+
+      - name: Install
+        run: |
           # Make a wheel and install it to catch possible issues with releases
           python -m build --wheel
           pip install dist/*.whl

repo2podman/podman.py

@@ -381,6 +381,8 @@ def __init__(self, *, parent):
     def build(
         self,
         *,
+        push=False,
+        load=False,
         buildargs=None,
         cache_from=None,
         container_limits=None,
@@ -449,6 +451,11 @@ def build(
         #     except KeyError:
         #         pass
 
+        # load is ignored, only used by docker buildx
+        # https://github.com/jupyterhub/repo2docker/pull/1421/files
+        if push and not tag:
+            raise ValueError("tag required when push=True")
+
         if kwargs:
             raise ValueError("Additional kwargs not supported")
 
@@ -474,6 +481,10 @@ def build(
             ):
                 yield line
 
+        if push:
+            for line in self.push(tag):
+                yield line
+
     def images(self):
         def remove_local(tags):
             if tags:
@@ -503,6 +514,18 @@ def remove_local(tags):
             ]
 
     def inspect_image(self, image):
+        # https://github.com/jupyterhub/repo2docker/pull/1421
+        # Return None if image doesn't exist
+        try:
+            exec_podman(
+                ["image", "exists", image], capture="both", exe=self.podman_executable
+            )
+        except PodmanCommandError as e:
+            if isinstance(e.e, CalledProcessError):
+                if e.e.returncode == 1:
+                    return None
+                raise
+
         lines = exec_podman(
             ["inspect", "--type", "image", "--format", self.format_arg, image],
             capture="stdout",