Hi Viraj,
Oops, wrong verbose. My fault -- I should've been clearer. I didn't mean
for you to set the "verbose" attribute of <javac>, but to run Ant with the
-verbose flag. Eg:
$ ant -verbose build-main
Thanks,
Diane
--- Viraj Purang <[EMAIL PROTECTED]> wrote:
> HI,
> The <Javac> task with the verbose option gave s0ome information but
> not
> good enough to lead me to deuce anything significant.
>
> The directory in question has 6 files and it compiles all 6 while it
> should
> do only one.
> build-main:
> [javac] Compiling 6 source files to
> C:\CVS1\builder\client\build\classes
> [javac] [parsed
> C:\CVS1\builder\client\com\spincircuit\utils\ErrorMessage.java in 531
> ms]
> [javac] [parsed
> C:\CVS1\builder\client\com\spincircuit\utils\Mail.java
> in 100 ms]
> [javac] [parsed
> C:\CVS1\builder\client\com\spincircuit\utils\MailException.java in 0 ms]
> [javac] [parsed
> C:\CVS1\builder\client\com\spincircuit\utils\PropertyLocator.java in 71
> ms]
> [javac] [parsed
> C:\CVS1\builder\client\com\spincircuit\utils\SwitchPathSlash.java in 20
> ms]
> [javac] [parsed
> C:\CVS1\builder\client\com\spincircuit\utils\TimeStamp.java in 30 ms]
> Which means that all the local files(in the current directory) are being
> parsed for compilation
>
> For all other files it gives me a
> [javac] [loaded c:\jdk1.3\jre\lib\rt.jar(java/util/Locale.class) in
> 60 ms]
> [javac] [loaded
> c:\jdk1.3\jre\lib\rt.jar(java/util/ResourceBundle.class) in 30
> [javac] [loaded c:\jdk1.3\jre\lib\rt.jar(java/lang/Object.class) in
> 10 ms]
> [javac] [loaded c:\jdk1.3\jre\lib\rt.jar(java/lang/Exception.class)
> in 0 ms]
> [javac] [loaded c:\jdk1.3\jre\lib\rt.jar(java/lang/Throwable.class)
> in 0 ms]
> and all these LOADED files are external files (outside the directory
> ...from
> the classpath)
>
> Regards,
> Viraj Purang
>
>
> -----Original Message-----
> From: Diane Holt [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, June 14, 2001 12:41 PM
> To: [EMAIL PROTECTED]
> Subject: RE: Java Dependencies ...
>
>
> Well, the page you pointed me to has this to say about using the
> -Xdepend
> flag:
> -Xdepend Recursively search all reachable classes for more recent
> source files to recompile. This option will more reliably
> discover classes that need to be recompiled, but can slow
> down the compilation process drastically.
>
> So, if all it's doing is looking for source-files that are newer than
> their classfile counterpart (which is what that says to me -- although
> I'm
> not sure what "reachable classes" means), then I don't see it being
> useful
> when using Ant's <javac> task, since that's what the task itself does.
>
> As for the <depend> task -- my understanding is that if you change a
> source-file that other source-files depend on, then running the <depend>
> task should remove all those dependents' classfiles, which will cause
> them
> to be handed off to the compiler when you then run the <javac> task
> (since
> the <javac> task will compile any source-file that either a) is newer
> than
> its corresponding classfile, or b) has no corresponding classfile.
>
> As for why all your source compiles every time you run the <javac> task
> --
> if it's doing it even when no source-file has changed, then I'd suggest
> running ant with the -verbose flag, which will give you output from
> <javac> telling you why it's compiling those files (it tends to be
> because
> it can't find the classfile). If it's doing it when you've changed a
> source-file that the whole world depends on, and you're running the
> <depend> task first, then it would be because all those classfiles are
> gone.
>
> Diane
>
> --- Viraj Purang <[EMAIL PROTECTED]> wrote:
> > Hi Diane,
> > It definitely helped me...
> >
> >
> > But I do remember having read in the "javac" description on
> java.sun.com
> > that javac's handling of "The need for recompilation" is not
> dependable
> > and
> > -depend option is more desirable to use. eg:
> > http://java.sun.com/products/jdk/1.2/docs/tooldocs/win32/javac.html
> >
> > "By default, javac considers a class file out of date only if it is
> > older
> > than the source file. (The -Xdepend option specifies a slower but more
> > reliable procedure."
> >
> >
> > Another clarification is about the javac task itself : you said
> >
> > "In any case, it isn't used to associate a dependency from the
> > classfiles to
> > the sourcefiles -- that's done by the <javac> task itself".
> >
> > Do you mean that the functionality is taken care of, by the "javac
> task
> > implementation in ANT" OR
> > comes to Ant intrinsically because "Javac executable which Ant
> > implementation from java.sun.com is supposed to handle this
> behaviour".
> >
> >
> > I have just completed a compilation script using Ant ...and based on
> > deductions I make regarding (which files are (re-)compiled and which
> are
> > not) I shall get back to you with more questions...
> >
> > I am currently using something like ...
> >
> > <target name="build-main">
> >
> > <depend srcdir="com/spincircuit"
> > destdir="{client.build}/classes"
> > cache="depcache"
> > closure="yes"/>
> >
> > <javac srcdir="com/spincircuit"
> destdir="${client.build}/classes"
> > depend="on"
> >
> >
>
classpath="${symbeans.jar}:${jsdk.jar}:${activation.jar}:${xerces.jar}:${ser
> > vlet.jar}:${mail.jar}:${jaws.jar}:
> >
>
${sfc.jar}:${bsf.jar}:${js.jar}:${jsse.jar}:${jnet.jar}:${jcert.jar}:${basev
> > ol}"
> > deprecation="off" debug="on" optimize="off" target="1.2"
> > excludes="**/CVS/**">
> > </javac>
> >
> > </target>
> >
> > Can you suggest the expected outcome of this set of statements ?
> >
> > Regards,
> > Viraj Purang
> >
> >
> >
> >
>
>
> =====
> ([EMAIL PROTECTED])
>
>
>
> __________________________________________________
> Do You Yahoo!?
> Spot the hottest trends in music, movies, and more.
> http://buzz.yahoo.com/
=====
([EMAIL PROTECTED])
__________________________________________________
Do You Yahoo!?
Spot the hottest trends in music, movies, and more.
http://buzz.yahoo.com/
