[jboss-jira] [JBoss JIRA] (WFCORE-4481) CLI control flow improvements
Kabir Khan created WFCORE-4481:
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Summary: CLI control flow improvements
Key: WFCORE-4481
URL: https://issues.jboss.org/browse/WFCORE-4481
Project: WildFly Core
Issue Type: Bug
Components: CLI
Reporter: Kabir Khan
Assignee: Jean Francois Denise
Working on CLI script for the OpenShift images, I have found numerous limitations in the
CLI control flow functionality. I am opening one issue just to record this, if work ever
happens on this I think doing whatever as possible as separate (groups of) RFEs is
reasonable.
The limitations in order of preference
*Support if/else-if*
At the moment it seems you can only do if/else. On its own this is not very useful, it
would also need implementing of 'Combine expressions being tested for' or
'Support nested control structures'
*Combine expressions being tested for*
E.g I can do {{if (outcome == success && result=in-memory) of
/subsystem=batch-jberet:read-attribute(name=default-job-repository)}}. It would be good to
be able to combine more than one of these along the lines of
{code}
if ((outcome == success) of
/subsystem=batch-jberet:read-attribute(name=default-job-repository)) && ((result
== 123) of /other=resource:read-attribute(name=some-attr))
{code}
*Support nested control structures
At the moment you can only have one level of each of if/for/try. For example the following
is allowed:
{code}
for child in /some=resource:read-children-names(child-type=type)
if (result == []) of
/some=resource/type=\$child:read-children-names(child-type=some-type)
try
#do something
end-try
end-if
done
{code}
But I cannot do:
{code}
if (outcome == success) of /some=resource:read-resource
if (outcome == success) of /some=resource/child=thing:read-resource
# do something
end-if
end-if
{code}
The same goes for for and try.
*Variables*
CLI allows you to use `set` to assign a variable. However, apart from substitution into
paths and attribute values they are not very useful. It would be nice to be able to use
them in if/for statements. It would also be nice to store the results of reads. Something
along the lines of
{code}
set (myvar=result && outcome==success) of
/some=resource:read-attribute(name=attr-name)
if ($myvar==https)
# do something
else if ($myvar==http)
# do something else
else
# another thing to do
end-if
{code}
*Array support*
I have
{code}
for serverName in /subsystem=undertow:read-children-names(child-type=server)
if (result == []) of
/subsystem=undertow/server=\$serverName:read-children-names(child-type=https-listener)
{code}
But I am only able to check if the result is empty. I can't check if it for example
contains the string 'https' as one of the entry. Also, apart from being empty we
don't really have a way to know the length.
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