On 2007-07-03 18:35:01 +0200, "Brian E. Fox" <[EMAIL PROTECTED]> said:
Is this a proposal on the wiki that is being summarized, or the whole =
Just first thoughts... I'm relatively new to this, so any help or
comments are welcome.
thing? If it's the whole thing, I have some questions:
1. Why a default value and a required flag? If it's required, when would =
the default be used?
Either can be omitted. You're right that specifying both at the same
time does not make sense. It is an error if a property is unspecified
and required, and there is no default value. If a property is
unspecified and has a default value, it is used.
2. How is the option value activated? Is this implying that these are =
the only valid values and an error should be thrown if it doesn't match?
If specified, option values are the only valid ones.
3. Can values be specified using a regex or wildcards?
That would sure be nice.
=20
(btw most of this can be done using the snapshot enforcer with the =
requireProperty rule)
Using the enforcer plugin is optional, while the proposal would force
people to declare their variables.
Regards,
Jochen
________________________________
From: news on behalf of Jochen Kuhnle
Sent: Tue 7/3/2007 12:05 PM
To: dev@maven.apache.org
Subject: Proposal: Required declaration of properties in pom.xml
Hi,
currently, Maven does not require declaration of properties used in the
pom, you just use them anywhere you like. Usually, if a property is
missing, bad things tend to happen because it is replaced with the
string "null". On a good day, resources from "translations-null-null"
aren't included in the build, on bad days it's worse... And when you
find the missing property in a pom you haven't written, you have to
figure out what "${lopt}" means and what its legal values are...
So instead typing
<properties>
<lopt>en_US</lopt>
</properties>
this proposal wants you to write
<properties>
<property>
<name>lopt</name>
<defaultValue>en_US</defaultValue>
<required>true</required>
<description>Locale to use</description>
<options>
<option>
<value>de_DE</value>
<description>Use German =
locale</description>
</option>
</options>
</property>
</properties>
Of course, Maven should display an error if a required variable is
missing. And it would be nice to have "help:describe-properties"...
Regards,
Jochen
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