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Posted to user@ant.apache.org by broken connection <br...@gmail.com> on 2007/11/12 18:32:56 UTC
Question about "depends" attribute in the target element
Hi Friends,
As far as I knew, if we have "depends" in the target then that target
would run only once. But my target is running multiple times.
For example, I have this:
<target name="targetA">
</target>
<target name="targetB" depends="targetA">
</target>
The execution results as:
targetA
targetA
targetB
But I thought since "targetA" has already been executed it should show up as:
targetA
targetB
And only if targetA has not been executed before, then "targetB"
should execute "targetA" i.e again the same output
targetA
targetB
Please help me guys as to where my understanding is wrong.
Thanks
Mick
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Re: Question about "depends" attribute in the target element
Posted by broken connection <br...@gmail.com>.
Thanks Guys,
Actually i was trying to avoid that conditional looping and trying to set up
new variables just to control the execution of the targets.
Moreover, I think the "unless" should accept the target name to avoid
setting an explicit property eg:
<target name = "first" />
<target name="second" unless="first" />
Anyways, thanks for all your help and time guys...appreciate it.
Mick
On 11/12/07, glenn opdycke-hansen <gl...@gmail.com> wrote:
>
> Perhaps the ant code could create/touch a file at the conclusion of A and
> test if the file is created at the beginning of A. If the file does not
> exist at the start of A, then invoke to actions of A. If the file exists
> at
> the start of A then do not invoke the actions of A.
> A should be refactored to different targets: testA and actionA.
>
> --glenn
>
> On Nov 12, 2007 1:10 PM, broken connection <br...@gmail.com>
> wrote:
>
> > Yeah,I apologize for that....but how can i resolve this guys???
> >
> > I want targetA and targetB to be indepently called under this scenario:
> > targetA can be called independently...
> > targetB always depends on targetA and should make sure targetA is ran
> > before
> > it runs....
> >
> > Any advice???
> >
> > Thanks
> >
> >
> > On 11/12/07, Rick Genter <rg...@silverlink.com> wrote:
> > >
> > > > From: broken connection [mailto: brokenconnection@gmail.com]
> > > > Sent: Monday, November 12, 2007 11:07 AM
> > > > To: Ant Users List
> > > > Subject: Re: Question about "depends" attribute in the target
> element
> > > >
> > > > Thanks Rick,
> > > > But like Glenn specified if you add an extra target then
> > > > everything works
> > > > fine, please see below:
> > >
> > > Yes, that's correct. There's nothing broken.
> > >
> > > If you do "ant first third" first will be run twice. Each target on
> the
> > > command line is invoked independent of the other targets on the
> command
> > > line.
> > >
> > > Ant is not make/gmake.
> > > --
> > > Rick Genter
> > > Principal Software Engineer
> > > Silverlink Communications
> > > rgenter@silverlink.com
> > > www.silverlink.com
> > > Office (781) 425-5763
> > > Mobile (781) 771-9677
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: user-unsubscribe@ant.apache.org
> > > For additional commands, e-mail: user-help@ant.apache.org
> > >
> > >
> >
>
Re: Question about "depends" attribute in the target element
Posted by glenn opdycke-hansen <gl...@gmail.com>.
Perhaps the ant code could create/touch a file at the conclusion of A and
test if the file is created at the beginning of A. If the file does not
exist at the start of A, then invoke to actions of A. If the file exists at
the start of A then do not invoke the actions of A.
A should be refactored to different targets: testA and actionA.
--glenn
On Nov 12, 2007 1:10 PM, broken connection <br...@gmail.com>
wrote:
> Yeah,I apologize for that....but how can i resolve this guys???
>
> I want targetA and targetB to be indepently called under this scenario:
> targetA can be called independently...
> targetB always depends on targetA and should make sure targetA is ran
> before
> it runs....
>
> Any advice???
>
> Thanks
>
>
> On 11/12/07, Rick Genter <rg...@silverlink.com> wrote:
> >
> > > From: broken connection [mailto:brokenconnection@gmail.com]
> > > Sent: Monday, November 12, 2007 11:07 AM
> > > To: Ant Users List
> > > Subject: Re: Question about "depends" attribute in the target element
> > >
> > > Thanks Rick,
> > > But like Glenn specified if you add an extra target then
> > > everything works
> > > fine, please see below:
> >
> > Yes, that's correct. There's nothing broken.
> >
> > If you do "ant first third" first will be run twice. Each target on the
> > command line is invoked independent of the other targets on the command
> > line.
> >
> > Ant is not make/gmake.
> > --
> > Rick Genter
> > Principal Software Engineer
> > Silverlink Communications
> > rgenter@silverlink.com
> > www.silverlink.com
> > Office (781) 425-5763
> > Mobile (781) 771-9677
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: user-unsubscribe@ant.apache.org
> > For additional commands, e-mail: user-help@ant.apache.org
> >
> >
>
Re: Question about "depends" attribute in the target element
Posted by "Scot P. Floess" <fl...@mindspring.com>.
Set a property after you execute targetA - and then use an unless attribute
<target name = "targetA" unless "done">
<property name = "done" value = "true"/>
...
</target>
<target name = "targetB" depends = "targetA">
...
</target>
broken connection wrote:
> Yeah,I apologize for that....but how can i resolve this guys???
>
> I want targetA and targetB to be indepently called under this scenario:
> targetA can be called independently...
> targetB always depends on targetA and should make sure targetA is ran before
> it runs....
>
> Any advice???
>
> Thanks
>
>
> On 11/12/07, Rick Genter <rg...@silverlink.com> wrote:
>
>>> From: broken connection [mailto:brokenconnection@gmail.com]
>>> Sent: Monday, November 12, 2007 11:07 AM
>>> To: Ant Users List
>>> Subject: Re: Question about "depends" attribute in the target element
>>>
>>> Thanks Rick,
>>> But like Glenn specified if you add an extra target then
>>> everything works
>>> fine, please see below:
>>>
>> Yes, that's correct. There's nothing broken.
>>
>> If you do "ant first third" first will be run twice. Each target on the
>> command line is invoked independent of the other targets on the command
>> line.
>>
>> Ant is not make/gmake.
>> --
>> Rick Genter
>> Principal Software Engineer
>> Silverlink Communications
>> rgenter@silverlink.com
>> www.silverlink.com
>> Office (781) 425-5763
>> Mobile (781) 771-9677
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: user-unsubscribe@ant.apache.org
>> For additional commands, e-mail: user-help@ant.apache.org
>>
>>
>>
>
>
--
Scot P. Floess
27 Lake Royale
Louisburg, NC 27549
252-478-8087 (Home)
919-754-4592 (Work)
Chief Architect JPlate http://sourceforge.net/projects/jplate
Chief Architect JavaPIM http://sourceforge.net/projects/javapim
RE: Question about "depends" attribute in the target element
Posted by Rick Genter <rg...@silverlink.com>.
> From: broken connection [mailto:brokenconnection@gmail.com]
> Sent: Monday, November 12, 2007 11:11 AM
> To: Ant Users List
> Subject: Re: Question about "depends" attribute in the target element
>
> Yeah,I apologize for that....but how can i resolve this guys???
>
> I want targetA and targetB to be indepently called under this
> scenario:
> targetA can be called independently...
> targetB always depends on targetA and should make sure
> targetA is ran before
> it runs....
>
> Any advice???
You'll need to structure your build something like this:
<target name="A" unless="A.has.already.run">
<echo>I am target A</echo>
<property name="A.has.already.run" value="true"/>
</target>
<target name="B" depends="A">
<echo>I am target B</echo>
</target>
--
Rick Genter
Principal Software Engineer
Silverlink Communications
rgenter@silverlink.com
www.silverlink.com
Office (781) 425-5763
Mobile (781) 771-9677
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Re: Question about "depends" attribute in the target element
Posted by broken connection <br...@gmail.com>.
Yeah,I apologize for that....but how can i resolve this guys???
I want targetA and targetB to be indepently called under this scenario:
targetA can be called independently...
targetB always depends on targetA and should make sure targetA is ran before
it runs....
Any advice???
Thanks
On 11/12/07, Rick Genter <rg...@silverlink.com> wrote:
>
> > From: broken connection [mailto:brokenconnection@gmail.com]
> > Sent: Monday, November 12, 2007 11:07 AM
> > To: Ant Users List
> > Subject: Re: Question about "depends" attribute in the target element
> >
> > Thanks Rick,
> > But like Glenn specified if you add an extra target then
> > everything works
> > fine, please see below:
>
> Yes, that's correct. There's nothing broken.
>
> If you do "ant first third" first will be run twice. Each target on the
> command line is invoked independent of the other targets on the command
> line.
>
> Ant is not make/gmake.
> --
> Rick Genter
> Principal Software Engineer
> Silverlink Communications
> rgenter@silverlink.com
> www.silverlink.com
> Office (781) 425-5763
> Mobile (781) 771-9677
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@ant.apache.org
> For additional commands, e-mail: user-help@ant.apache.org
>
>
RE: Question about "depends" attribute in the target element
Posted by Rick Genter <rg...@silverlink.com>.
> From: broken connection [mailto:brokenconnection@gmail.com]
> Sent: Monday, November 12, 2007 11:07 AM
> To: Ant Users List
> Subject: Re: Question about "depends" attribute in the target element
>
> Thanks Rick,
> But like Glenn specified if you add an extra target then
> everything works
> fine, please see below:
Yes, that's correct. There's nothing broken.
If you do "ant first third" first will be run twice. Each target on the
command line is invoked independent of the other targets on the command
line.
Ant is not make/gmake.
--
Rick Genter
Principal Software Engineer
Silverlink Communications
rgenter@silverlink.com
www.silverlink.com
Office (781) 425-5763
Mobile (781) 771-9677
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To unsubscribe, e-mail: user-unsubscribe@ant.apache.org
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Re: Question about "depends" attribute in the target element
Posted by broken connection <br...@gmail.com>.
Thanks Rick,
But like Glenn specified if you add an extra target then everything works
fine, please see below:
build.xml:
<project>
<target name="first">
<echo message="target First" />
</target>
<target name="second" depends="first">
<echo message="target Second" />
</target>
<target name="third" depends="first,second">
<echo message="target Third" />
</target>
</project>
Output:
Total time: 0 seconds
C:\Documents and Settings\hjhutty\Desktop\test>ant first second
Buildfile: build.xml
first:
[echo] target First
first:
[echo] target First
second:
[echo] target Second
BUILD SUCCESSFUL
Total time: 0 seconds
C:\Documents and Settings\mick\Desktop\test>ant third
Buildfile: build.xml
first:
[echo] target First
second:
[echo] target Second
third:
[echo] target Third
BUILD SUCCESSFUL
Total time: 0 seconds
And I would like to know the solution for this, how to resolve this issue
then because I thought "depends" would do it for me but as you can see i am
getting stuck...
Thanks
Mick
On 11/12/07, Rick Genter <rg...@silverlink.com> wrote:
>
> > From: broken connection [mailto:brokenconnection@gmail.com]
> > Sent: Monday, November 12, 2007 11:01 AM
> > To: Ant Users List
> > Subject: Re: Question about "depends" attribute in the target element
> >
> > Thanks Glenn,
> > Here's a small test script that i wrote that simulates my
> > environment and
> > proves my findings:
> >
> > build.xml:
> > <project>
> > <target name="first">
> > <echo message="target First" />
> > </target>
> >
> > <target name="second" depends="first">
> > <echo message="target Second" />
> > </target>
> > </project>
> > Output:
> >
> > C:\Documents and Settings\mick\Desktop\test>ant first second
> > Buildfile: build.xml
> >
> > first:
> > [echo] target First
> >
> > first:
> > [echo] target First
> >
> > second:
> > [echo] target Second
> >
> > BUILD SUCCESSFUL
> > Total time: 0 seconds
> > C:\Documents and Settings\hjhutty\Desktop\test>
> >
> > It clearly shows that the first target is run multiple
> > times.Can someone
> > please correct my understanding as to why this is happening.
>
> Ant targets specified on the command line are invoked independently;
> it's as if you specified "ant first ; ant second", with the caveat that
> any properties defined during the execution of the first target will
> still be defined when the second target is executed.
> --
> Rick Genter
> Principal Software Engineer
> Silverlink Communications
> rgenter@silverlink.com
> www.silverlink.com
> Office (781) 425-5763
> Mobile (781) 771-9677
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@ant.apache.org
> For additional commands, e-mail: user-help@ant.apache.org
>
>
RE: Question about "depends" attribute in the target element
Posted by Rick Genter <rg...@silverlink.com>.
> From: broken connection [mailto:brokenconnection@gmail.com]
> Sent: Monday, November 12, 2007 11:01 AM
> To: Ant Users List
> Subject: Re: Question about "depends" attribute in the target element
>
> Thanks Glenn,
> Here's a small test script that i wrote that simulates my
> environment and
> proves my findings:
>
> build.xml:
> <project>
> <target name="first">
> <echo message="target First" />
> </target>
>
> <target name="second" depends="first">
> <echo message="target Second" />
> </target>
> </project>
> Output:
>
> C:\Documents and Settings\mick\Desktop\test>ant first second
> Buildfile: build.xml
>
> first:
> [echo] target First
>
> first:
> [echo] target First
>
> second:
> [echo] target Second
>
> BUILD SUCCESSFUL
> Total time: 0 seconds
> C:\Documents and Settings\hjhutty\Desktop\test>
>
> It clearly shows that the first target is run multiple
> times.Can someone
> please correct my understanding as to why this is happening.
Ant targets specified on the command line are invoked independently;
it's as if you specified "ant first ; ant second", with the caveat that
any properties defined during the execution of the first target will
still be defined when the second target is executed.
--
Rick Genter
Principal Software Engineer
Silverlink Communications
rgenter@silverlink.com
www.silverlink.com
Office (781) 425-5763
Mobile (781) 771-9677
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Re: Question about "depends" attribute in the target element
Posted by broken connection <br...@gmail.com>.
Thanks Glenn,
Here's a small test script that i wrote that simulates my environment and
proves my findings:
build.xml:
<project>
<target name="first">
<echo message="target First" />
</target>
<target name="second" depends="first">
<echo message="target Second" />
</target>
</project>
Output:
C:\Documents and Settings\mick\Desktop\test>ant first second
Buildfile: build.xml
first:
[echo] target First
first:
[echo] target First
second:
[echo] target Second
BUILD SUCCESSFUL
Total time: 0 seconds
C:\Documents and Settings\hjhutty\Desktop\test>
It clearly shows that the first target is run multiple times.Can someone
please correct my understanding as to why this is happening.
Thanks
Mick
On 11/12/07, glenn opdycke-hansen <gl...@gmail.com> wrote:
>
> Could you post the complete Ant script?
> How are you invoking the script and the target(s)?
>
> I noticed if you invoke ant with both targetA and targetB, then targetA
> would be called multiple times.
>
> However if you invoke ant with targetC (below) then targetA is invoked
> once.
>
> <target name="targetC" depends="targetA, targetB">
> <echo>in targetC</echo>
> </target>
>
> --glenn
>
> On Nov 12, 2007 11:32 AM, broken connection <br...@gmail.com>
> wrote:
>
> > Hi Friends,
> > As far as I knew, if we have "depends" in the target then that target
> > would run only once. But my target is running multiple times.
> >
> > For example, I have this:
> >
> > <target name="targetA">
> > </target>
> >
> > <target name="targetB" depends="targetA">
> > </target>
> >
> > The execution results as:
> > targetA
> > targetA
> > targetB
> >
> > But I thought since "targetA" has already been executed it should show
> up
> > as:
> >
> > targetA
> > targetB
> >
> > And only if targetA has not been executed before, then "targetB"
> > should execute "targetA" i.e again the same output
> >
> > targetA
> > targetB
> >
> > Please help me guys as to where my understanding is wrong.
> >
> > Thanks
> > Mick
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: user-unsubscribe@ant.apache.org
> > For additional commands, e-mail: user-help@ant.apache.org
> >
> >
>
Re: Question about "depends" attribute in the target element
Posted by glenn opdycke-hansen <gl...@gmail.com>.
Could you post the complete Ant script?
How are you invoking the script and the target(s)?
I noticed if you invoke ant with both targetA and targetB, then targetA
would be called multiple times.
However if you invoke ant with targetC (below) then targetA is invoked once.
<target name="targetC" depends="targetA, targetB">
<echo>in targetC</echo>
</target>
--glenn
On Nov 12, 2007 11:32 AM, broken connection <br...@gmail.com>
wrote:
> Hi Friends,
> As far as I knew, if we have "depends" in the target then that target
> would run only once. But my target is running multiple times.
>
> For example, I have this:
>
> <target name="targetA">
> </target>
>
> <target name="targetB" depends="targetA">
> </target>
>
> The execution results as:
> targetA
> targetA
> targetB
>
> But I thought since "targetA" has already been executed it should show up
> as:
>
> targetA
> targetB
>
> And only if targetA has not been executed before, then "targetB"
> should execute "targetA" i.e again the same output
>
> targetA
> targetB
>
> Please help me guys as to where my understanding is wrong.
>
> Thanks
> Mick
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@ant.apache.org
> For additional commands, e-mail: user-help@ant.apache.org
>
>
Re: Question about "depends" attribute in the target element
Posted by Matt Benson <gu...@yahoo.com>.
--- Steve Loughran <st...@apache.org> wrote:
> David Weintraub wrote:
> > If you invoke multiple targets on the command
> line, each target will
> > execute, and dependencies will execute
> independently. There is no way
> > of Ant to know if one of the targets you put on
> the command line might
> > affect a later target. For example:
> >
> > $ ant first clean_first second
> >
> > If Ant kept track of targets already executed, it
> would be messed up
> > by the "clean_first" target. Target "second"
> depends upon "first", but
> > "clean_first" destroyed what files "first" had
> built. That's why each
> > target will execute all of its dependencies.
> >
> > However, this works fine:
> >
> > <project name="test">
> > <target name="first"/>
> > <target name="second" depends="first"/>
> > <target name="third" depends="first,second"/>
> > </project>
> >
> > Executing:
> >
> > $ ant third
> > [first]
> > [second]
> > [third]
> >
> > Executes target "first" only a single time
>
> There is actually a way to maybe get Ant to resolve
> dependencies across
> targets on the command line, but it isnt exposed to
> the end user. Inside
> ant there are these things called Executors that
> decide which targets to
> run next. The normal executor runs everything on the
> command line. If
> you go -keepgoing, a new executor runs targets that
> dont depend on
> targets that have failed; it 'keeps going' as well
> as it can. You could
> probably add a new executor that took intra-target
> dependencies into
> account, and switch to it using whichever magic
> property identifies the
> new executor. This is pretty low level though; I
> don't know anyone who
> has done this.
>
This sounds suspiciously like the single-check
executor that runs command-line targets as if they
were all dependencies of another target, similar to
the example the user specified:
ant
-Dant.executor.class=org.apache.tools.ant.helper.SingleCheckExecutor
foo bar
HTH,
Matt
> --
> Steve Loughran
> http://www.1060.org/blogxter/publish/5
> Author: Ant in Action http://antbook.org/
>
>
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Re: Question about "depends" attribute in the target element
Posted by Steve Loughran <st...@apache.org>.
David Weintraub wrote:
> If you invoke multiple targets on the command line, each target will
> execute, and dependencies will execute independently. There is no way
> of Ant to know if one of the targets you put on the command line might
> affect a later target. For example:
>
> $ ant first clean_first second
>
> If Ant kept track of targets already executed, it would be messed up
> by the "clean_first" target. Target "second" depends upon "first", but
> "clean_first" destroyed what files "first" had built. That's why each
> target will execute all of its dependencies.
>
> However, this works fine:
>
> <project name="test">
> <target name="first"/>
> <target name="second" depends="first"/>
> <target name="third" depends="first,second"/>
> </project>
>
> Executing:
>
> $ ant third
> [first]
> [second]
> [third]
>
> Executes target "first" only a single time
There is actually a way to maybe get Ant to resolve dependencies across
targets on the command line, but it isnt exposed to the end user. Inside
ant there are these things called Executors that decide which targets to
run next. The normal executor runs everything on the command line. If
you go -keepgoing, a new executor runs targets that dont depend on
targets that have failed; it 'keeps going' as well as it can. You could
probably add a new executor that took intra-target dependencies into
account, and switch to it using whichever magic property identifies the
new executor. This is pretty low level though; I don't know anyone who
has done this.
--
Steve Loughran http://www.1060.org/blogxter/publish/5
Author: Ant in Action http://antbook.org/
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Re: Question about "depends" attribute in the target element
Posted by David Weintraub <qa...@gmail.com>.
If you invoke multiple targets on the command line, each target will
execute, and dependencies will execute independently. There is no way
of Ant to know if one of the targets you put on the command line might
affect a later target. For example:
$ ant first clean_first second
If Ant kept track of targets already executed, it would be messed up
by the "clean_first" target. Target "second" depends upon "first", but
"clean_first" destroyed what files "first" had built. That's why each
target will execute all of its dependencies.
However, this works fine:
<project name="test">
<target name="first"/>
<target name="second" depends="first"/>
<target name="third" depends="first,second"/>
</project>
Executing:
$ ant third
[first]
[second]
[third]
Executes target "first" only a single time
On Nov 12, 2007 12:32 PM, broken connection <br...@gmail.com> wrote:
> Hi Friends,
> As far as I knew, if we have "depends" in the target then that target
> would run only once. But my target is running multiple times.
>
> For example, I have this:
>
> <target name="targetA">
> </target>
>
> <target name="targetB" depends="targetA">
> </target>
>
> The execution results as:
> targetA
> targetA
> targetB
>
> But I thought since "targetA" has already been executed it should show up as:
>
> targetA
> targetB
>
> And only if targetA has not been executed before, then "targetB"
> should execute "targetA" i.e again the same output
>
> targetA
> targetB
>
> Please help me guys as to where my understanding is wrong.
>
> Thanks
> Mick
>
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David Weintraub
qazwart@gmail.com
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