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Module alternatives: support RedHat-based OSes

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RedHat-based OSes have a version of update-alternatives which comes from
the chkconfig package and does not support the --query parameter. Work
around that.
This commit is contained in:
Aurélien Bompard 2014-09-22 18:54:39 +02:00
parent b645dd330c
commit 6b5aa62854
1 changed files with 18 additions and 2 deletions
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20
system/alternatives.py
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@ -75,13 +75,14 @@ def main():
current_path = None
all_alternatives = []
os_family = None
(rc, query_output, query_error) = module.run_command(
[UPDATE_ALTERNATIVES, '--query', name]
)
# Gather the current setting and all alternatives from the query output.
# Query output should look something like this:
# Query output should look something like this on Debian systems:
# Name: java
# Link: /usr/bin/java
@ -102,6 +103,7 @@ def main():
# java.1.gz /usr/lib/jvm/java-7-openjdk-amd64/jre/man/man1/java.1.gz
if rc == 0:
os_family = "Debian"
for line in query_output.splitlines():
split_line = line.split(':')
if len(split_line) == 2:
@ -113,13 +115,27 @@ def main():
all_alternatives.append(value)
elif key == 'Link' and not link:
link = value
elif rc == 2:
os_family = "RedHat"
# This is the version of update-alternatives that is shipped with
# chkconfig on RedHat-based systems. Try again with the right options.
(rc, query_output, query_error) = module.run_command(
[UPDATE_ALTERNATIVES, '--list']
)
for line in query_output.splitlines():
line_name, line_mode, line_path = line.strip().split("\t")
if line_name != name:
continue
current_path = line_path
break
if current_path != path:
if module.check_mode:
module.exit_json(changed=True, current_path=current_path)
try:
# install the requested path if necessary
if path not in all_alternatives:
# (unsupported on the RedHat version)
if path not in all_alternatives and os_family == "Debian":
module.run_command(
[UPDATE_ALTERNATIVES, '--install', link, name, path, str(DEFAULT_LINK_PRIORITY)],
check_rc=True