Hi,
platform!all
means that the profile will be active when the system property
"platform" is not defined, or is defined with a value different than
"all". Put another way, it is always active unless "platform" is equal
to "all". This explains your observations, where both platform-reactor
and default-reactor are active when the system property isn't set.
There was the JIRA MNGSITE-293, in which the documentation was clarified
to reflect this.
Guillaume
Le 12/03/2017 à 05:00, Justin Georgeson a écrit :
Seeing that I can ! the property value in a profile activation, I assumed there
were three states to consider when evaluating the property activation:
1. Property not set
2. Property set and value does not match
3. Property set and value does match
With this assumption I thought that with profiles such as these
default-reactor
!platform
platform-reactor
platform!all
all-platforms-reactor
platformall
I would only see one of the three profiles active at a time. However when I run
Maven 'mvn help:active-profiles' with no 'platform' property then both the
'default-reactor' and 'platform-reactor' are active. When I set the 'platform'
property then I see the behavior I expected. Looking at the source
https://github.com/apache/maven/blob/38300cf2832e9a40198091aa9e0bf6d3dbc3268d/maven-model-builder/src/main/java/org/apache/maven/model/profile/activation/PropertyProfileActivator.java#L95
It's doing a string compare of the activation's declared property value against the
context's property value, but it's not checking the context has a property set. But I
would infer from the comment on L94 ("we have a value, so it has to match the system
value...") that an unset property should not match a !value activation.
Should I open a JIRA issue as a bug, or as a feature request?
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