I am looking for help with using Ivy and environment variables. Is there any
way to conditionally use an environment variable in ivysettings.xml, and if it
is not set, then fall back on a default? Basically, what we want is something
like that if the IVY_SERVER environment variable is set, use it, otherwise
default to http://ivy:8081/. Kind of like how shell would do it with a
definition like ${IVY_SERVER:-http://ivy:8081}. I can’t find a way to achieve
this same behavior in Ivy.
We tried this in ivysettings.xml:
<properties environment="env"/>
<property name="ivy.repos.server" value="${env.IVY_SERVER}" override="false"/>
<property name="ivy.repos.server" value="http://ivy:8081"; override="false"/>
And it doesn't work. ivy.repos.server either ends up with the value of the
environment variable IVY_SERVER (which is desirable) or the value
${env.IVY_SERVER} if no environment variable is defined (which is undesirable).
So, in our attempt, the second property setting never happens.
Now I understand this is the way it works in ant, so this make Ivy consistent
with how ant works. However, ant has “condition”, which can achieve the actual
effect that we want like this:
<condition property="ivy.repos.server" value="${env.IVY_SERVER}">
<isset property="env.IVY_SERVER"/>
</condition>
<property name="ivy.repos.server" value="http://ivy:8081"/>
Is there a way to do this with Ivy? If not, that makes it pretty impossible to
allow users to use environment variables to override the default behavior of
the system.
Any help would be appreciated. Thanks in advance.
-J.C.
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