diskimage-builder/diskimage_builder/elements/dib-python/environment.d/50-dib-python-version
Nir Magnezi ee46e2f9b7 Add version-less RHEL element for RHEL7 and RHEL8
Make a version-less RHEL element to handle both '7' and '8' DIB_RELEASE.
The element usage should align with other elements which operate in the
same way such as the Fedora element.

Additionally, this patch adds support for RHEL8 that operates with
Python 3.
As of now, users of diskimage-builder will still be able to use the
'rhel7' element, or migrate to 'rhel' and specify their respective
DIB_RELEASE value.

* mount the xfs file-system for extraction as read-only.  vaguely
  based on explaination in [1] and the fact we only read the image
  data into a tar, so can ignore this.

    XFS (dm-1): Superblock has unknown read-only compatible features (0x4) enabled.

* Use the redhat system python as the dib-python version.  dib was
  ahead of it's time making an abstracted python interpreter for
  system work ;) the system python should work for running the various
  dib element scripts.

[1] https://unix.stackexchange.com/questions/247550/unmountable-xfs-filesystem

Redhat-Bug: https://bugzilla.redhat.com/show_bug.cgi?id=1700253
Co-Authored-By: Ian Wienand <iwienand@redhat.com>
Change-Id: I90540675c70bb475d9db2ae24f81c648a31f3f95
2019-05-29 11:28:53 +03:00

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# Pick which distros we need to force python2 and which to python3
if [ -z "${DIB_PYTHON_VERSION:-}" ]; then
if [ "$DISTRO_NAME" == "ubuntu" ]; then
if [ "$DIB_RELEASE" == "trusty" ]; then
DIB_PYTHON_VERSION=2
fi
elif [ "$DISTRO_NAME" == "debian" ]; then
DIB_PYTHON_VERSION=2
elif [ "$DISTRO_NAME" == "fedora" ]; then
if [ "$DIB_RELEASE" -le 22 ]; then
DIB_PYTHON_VERSION=2
fi
elif [ "$DISTRO_NAME" == "centos" ]; then
DIB_PYTHON_VERSION=2
elif [ "$DISTRO_NAME" == "centos7" ]; then
DIB_PYTHON_VERSION=2
elif [ "$DISTRO_NAME" == "rhel7" ]; then
# TODO(nmagnezi): Remove this when the 'rhel7' element gets replaced by 'rhel'
DIB_PYTHON_VERSION=2
elif [ "$DISTRO_NAME" == "rhel" ]; then
if [ "$DIB_RELEASE" -le 7 ]; then
DIB_PYTHON_VERSION=2
elif [ "$DIB_RELEASE" -ge 8 ]; then
DIB_PYTHON_VERSION=3
fi
elif [ "$DISTRO_NAME" == "opensuse" ]; then
DIB_PYTHON_VERSION=2
fi
fi
if [ -z "${DIB_PYTHON_VERSION:-}" ]; then
DIB_PYTHON_VERSION=3
fi
export DIB_PYTHON_VERSION
export DIB_PYTHON=python${DIB_PYTHON_VERSION}
# Local variables:
# mode: sh
# End: