Install ibmmq from a wheel in IBM MQ lowest-dependency tests (#74132)

Lowest-direct resolution picked ibmmq 2.0.6, which is sdist-only and needed
the IBM MQ C client downloaded from public.dhe.ibm.com; the job failed
whenever that host timed out. ibmmq 2.1.0 is the first release with a Linux
x86_64 wheel, so raising the floor removes the download and its manifest.
The tests fall back to the fake ibmmq module when the wheel is installed but
the C client library is not available.

Author: shahar1

Dockerfile.ci

@@ -1553,7 +1553,7 @@ function reinstall_shared_distributions() {
     uv pip install --no-deps $(ls -d /opt/airflow/shared/*/)
 }
 
-PROVIDERS_NEEDING_PRE_EXTRAS_INSTALL=("ibm.mq")
+PROVIDERS_NEEDING_PRE_EXTRAS_INSTALL=()
 
 function run_pre_extras_install_if_registered() {
     local provider_id="${1}"

contributing-docs/12_provider_distributions.rst

@@ -158,8 +158,10 @@ Because the new group is *not* part of ``dev``, a plain ``uv sync`` on a contrib
 will not try to install it. The CI image installs it via ``ci-image``.
 
 **Shape B: the Python package's wheel build needs a proprietary SDK that cannot live in the
-base CI image** (e.g. IBM MQ's ``ibmmq`` needs the IBM MQ Redistributable Client headers and
-``MQ_FILE_PATH`` set at build time). Bundling such SDKs in the base image has licence,
+base CI image** (e.g. ``ibmmq`` releases before 2.1.0 were sdist-only and needed the IBM MQ
+Redistributable Client headers and ``MQ_FILE_PATH`` set at build time). First check whether
+raising the lower bound to a release that ships wheels avoids the build — a download at test
+time makes the job depend on the upstream host being reachable. Bundling such SDKs in the base image has licence,
 maintenance, and image-size costs that the project does not want to pay on every CI run.
 The lowest-direct-dependency provider tests still call ``uv sync --all-extras`` inside the
 provider directory, so simply mocking the package in tests is not enough — the sync itself
@@ -185,7 +187,7 @@ must succeed first. Use the per-provider pre-extras-install manifest:
 
    .. code:: yaml
 
-       # providers/ibm/mq/pre_extras_install.yaml
+       # providers/<id>/pre_extras_install.yaml
        downloads:
          - url: https://public.dhe.ibm.com/.../9.4.0.0-IBM-MQC-Redist-LinuxX64.tar.gz
            sha256: <64 lowercase hex chars>

providers/ibm/mq/docs/index.rst

@@ -139,7 +139,7 @@ Install them when installing from PyPI. For example:
 ====================  ===============================================================================
 Extra                 Dependencies
 ====================  ===============================================================================
-``ibmmq``             ``ibmmq>=2.0.6; platform_machine != "aarch64" and platform_machine != "arm64"``
+``ibmmq``             ``ibmmq>=2.1.0; platform_machine != "aarch64" and platform_machine != "arm64"``
 ``common.messaging``  ``apache-airflow-providers-common-messaging>=2.0.0``
 ====================  ===============================================================================
 

providers/ibm/mq/pre_extras_install.yaml

@@ -72,7 +72,9 @@ dependencies = [
     # Required at Runtime
     # IBM MQ ships its native C client only for Linux x86_64 / Windows x64, so the `ibmmq`
     # bindings cannot be built on ARM. Skip it there (mirrors provider.yaml excluded-platforms).
-    "ibmmq>=2.0.6; platform_machine != \"aarch64\" and platform_machine != \"arm64\"",
+    # 2.1.0 is the first release with a Linux x86_64 wheel; older ones are sdist-only and need the
+    # IBM MQ C client to build.
+    "ibmmq>=2.1.0; platform_machine != \"aarch64\" and platform_machine != \"arm64\"",
 ]
 "common.messaging" = [
     "apache-airflow-providers-common-messaging>=2.0.0"

providers/ibm/mq/pyproject.toml

@@ -34,8 +34,12 @@ def _ensure_fake_ibmmq_if_missing():
     behavior.
     """
 
-    if importlib.util.find_spec("ibmmq") is not None:
-        # Real package available, nothing to do.
+    try:
+        importlib.import_module("ibmmq")
+    except ImportError:
+        # Not installed, or installed from a wheel without the IBM MQ C client (libmqm_r) available.
+        pass
+    else:
         yield
         return
 

providers/ibm/mq/tests/conftest.py

@@ -432,7 +432,7 @@ function reinstall_shared_distributions() {
 # export. Providers cannot run arbitrary code through this hook. Maintainers should
 # review every addition to this list as a privileged change. See
 # contributing-docs/12_provider_distributions.rst.
-PROVIDERS_NEEDING_PRE_EXTRAS_INSTALL=("ibm.mq")
+PROVIDERS_NEEDING_PRE_EXTRAS_INSTALL=()
 
 function run_pre_extras_install_if_registered() {
     local provider_id="${1}"