diskimage-builder/diskimage_builder/elements/svc-map/bin/svc-map
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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#!/usr/local/bin/dib-python
# Copyright 2012 Hewlett-Packard Development Company, L.P.
# Copyright 2014 Red Hat, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import os
import sys
import yaml
def load_service_mapping(filepath="/usr/share/svc-map/services"):
if not os.path.isfile(filepath):
return {}
with open(filepath, 'r') as data_file:
return yaml.safe_load(data_file.read())
def main():
for arg in sys.argv[1:]:
# We need to support the service name being different when installing
# from source vs. packages. So, if the requested service file already
# exists, just use that.
if os.path.exists('/lib/systemd/system/%s.service' % arg): # systemd
print(arg)
elif os.path.exists('/etc/init/%s.conf' % arg): # upstart
print(arg)
else:
service_map = load_service_mapping()
name = service_map.get(arg, arg)
print(name)
sys.exit(0)
if __name__ == '__main__':
main()