Certainly!
I would like to allow targets to "dynamically" add other targets to execute
onsuccess or onfailure. The simplest solution I can think of is to define an
onsuccess and an onfailure target to handle the appropriate situation and
provide a property where the other targets can add their extra handler:
[example]
<property name="nant.onsuccess" value="teardown.success" />
<property name="nant.onfailure" value="teardown.failure" />
<property name="teardown.success.targets" value="" /><!-- default: empty string
-->
<property name="teardown.failure.targets" value="" /><!-- default: empty string
-->
<target name="teardown.success">
<foreach item="String" in="${teardown.success.targets}" delim=" "
property="${teardown.target}">
<call target="${teardown.target}" />
</foreach>
</target>
<target name="teardown.failure">
<foreach item="String" in="${teardown.failure.targets}" delim=" "
property="${teardown.target}">
<call target="${teardown.target}" />
</foreach>
</target>
[/example]
This system can then by used at "runtime" by other tasks to add handlers to the
two cases:
[example]
<target name="init">
<!-- add a handler at runtime when init is executed -->
<property name="teardown.failure.targets" value=" preundo
${teardown.failure.targets} postundo" />
</target>
<target name="preundo" />
<target name="postundo" />
[/example]
In this example preundo would be a target that gets execute prior to any
targets already present in teardown.failure.targets. Likewise postundo would
get executed after the current teardown.failure.targets. One must use great
care to make sure that one includes teardown.failure.targets or
teardown.success.targets when changing their value or one completely redefines
them.
A better solution would be to encapsulate this all behind custom tasks and
provide custom functions to better manage the addition (and perhaps removal) of
handler targets and their order of execution. Then each target needing to add a
onsuccess handler could do something like this:
[example]
<property name="nant.onsuccess" value="teardown.success" />
<target name="teardown.success">
<onsuccess execute="true" />
</target>
<target name="init">
<onsuccess>
<addhandler target="processlogs" priority="1" />
</onsuccess>
</target>
[/example]
You can imagine how <removehandler> would be used. <onfailure> would be used in
a very similar fashion.
Implementing this might be trickier. OnSuccessTask and OnFailureTask would be
logical singletons and I'm not sure if NAnt's execution model would conflict
with them. Perhaps if each instance of OnSuccessTask and OnFailureTask simply
define actions to be taken on the internal SuccessSingleton and
FailureSingleton... that might work. Anyway, it's and idea.
Please don't hesitate to ask if you need more clarification. I hope this
clarifies what I was trying to do and the two solutions I've come thought up.
--Edwin
________________________________________
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Butler, Mark A
Mr IPI Gramm Tech
Sent: Wednesday, January 26, 2005 1:43 PM
To: [EMAIL PROTECTED] Sourceforge. Net
Subject: RE: [Nant-users] Specifying a Finally target
I was thinking along the line of...
<property name="nant.onsuccess" value="target1" />
<target name="target1"
<call target="target2"/>
<call target="target3"/>
</target>
Can you post your workaround for the edification of the uninitiated? (Me)
MArk B.
-----Original Message-----
From: Castro, Edwin Gabriel (Firing Systems Engr.) [mailto:[EMAIL PROTECTED]
Sent: Wednesday, January 26, 2005 1:35 PM
To: Butler, Mark A Mr IPI Gramm Tech; [EMAIL PROTECTED] Sourceforge. Net
Subject: RE: [Nant-users] Specifying a Finally target
Like this:
<property name="nant.onsuccess" value="target1 target2 target3" />
I need to add targets dynamically at runtime. There's no problem if nant
doesn't support this natively. The workaround is quite trivial and I've already
implemented it. I was just wondering if nant already allowed for this.
________________________________________
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Butler, Mark A
Mr IPI Gramm Tech
Sent: Wednesday, January 26, 2005 12:09 PM
To: [EMAIL PROTECTED] Sourceforge. Net
Subject: RE: [Nant-users] Specifying a Finally target
You can put more tasks within the onsuccess and onfailure.
MArk B.
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