Gradle build progress

Mark Fortner phidias51 at
Sun Mar 24 16:13:15 PDT 2013

Just out of curiosity, does anyone know if there's a registry entry on
Windows that corresponds to the JAVA_HOME variable? Also, when you use the
control panel to determine what the default version of java is, there must
be some preference/registry entry being set. I don't have a Windows box to
try this on, but perhaps someone who does could take a look.

On Mar 23, 2013 10:53 PM, "Richard Bair" <richard.bair at> wrote:

> > I can confirm I have the same problem that Peter has (btw, I tried with
> Gradle 1.3 and seem to work to the same extent that 1.4 does). I guess the
> real solution is to open another couple of bits of code ;)
> I may have found the root cause here (or at least, a root cause). The
> basic problem is that on Windows the JRE is installed twice -- once in jre8
> and once in jdk1.8.0/jre. Which one the developer might have on their path
> is anyone's guess (but if their system is like mine, it will be jre8). The
> other platforms don't do this -- at least, definitely not on Mac and I have
> yet to see this on Linux. The result is that the logic that tried to guess
> the JDK directory location didn't work on windows. I'm not sure this new
> logic is really going to work either in the long term, but it works for
> today. If there is a more bulletproof solution that doesn't require every
> developer to manually specify JDK_HOME or JAVA_HOME, then I'd like to know
> it!
> Here it is, in all its grizzly glory:
> // Get the JDK_HOME automatically based on the version of Java used to
> execute gradle. Or, if specified,
> // use a user supplied JDK_HOME, BINARY_STUB, JAVAC, and/or JAVAH, all of
> which may be specified
> // independently (or we'll try to get the right one based on other
> supplied info). There is a really
> // odd situation on windows where you can have two JRE's on the same
> system(!!!):
> //    c:\Program Files (x86)\Java\jdk1.8.0\jre
> //    c:\Program Files (x86)\Java\jre8\
> // Because of this, you may sometimes get the jdk's JRE (in which case the
> logic we used to have here
> // was correct and consistent with all other platforms), or it might be
> the standalone JRE (for the love!).
> // So what we have to do is add some special windows-only logic here to
> figure out the JDK based on the
> // wrong JRE, if we happen to have gotten the wrong JRE.
> ext.JAVA_HOME = System.getProperty("java.home");
> def javaHomeFile = file(JAVA_HOME);
> defineProperty("JDK_HOME",
> == "jre" ?
>         javaHomeFile.getParent().toString() :
>"jre") ?
>         new File(javaHomeFile.getParent(),
> "jdk1.${}.0").toString() :
>         JAVA_HOME); // we have to bail and set it to something and this is
> as good as any!
> In order to debug your system, run something simple like:
> gradle projects --info
> See what is reported for the JAVA_HOME and JDK_HOME and BINARY_STUB. If
> JDK_HOME isn't pointing to the actual JDK directory (and you haven't
> manually specified the BINARY_STUB) you will have problems. If the
> BINARY_STUB isn't pointing to the jfxrt.jar of the latest JDK directory,
> then you'll have problems (unless you copied that file somewhere else and
> are pointing at it instead).
> Richard

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