Created attachment 959536 [details]
Patch for f21/f22

Scratch builds:

http://koji.fedoraproject.org/koji/taskinfo?taskID=8198486 (x86/armv7)
http://arm.koji.fedoraproject.org/koji/taskinfo?taskID=2795416 (aarch64)
http://ppc.koji.fedoraproject.org/koji/taskinfo?taskID=2192169 (ppc64/le)

(In reply to Yaakov Selkowitz from comment #1)
> http://ppc.koji.fedoraproject.org/koji/taskinfo?taskID=2192169 (ppc64/le)

Correction: http://ppc.koji.fedoraproject.org/koji/taskinfo?taskID=2192168

Created attachment 959537 [details]
Patch for f20

Scratch builds:

http://koji.fedoraproject.org/koji/taskinfo?taskID=8198666 (x86/armv7)
http://ppc.koji.fedoraproject.org/koji/taskinfo?taskID=2192303 (ppc/ppc64)

I understand your concern and intention. Nevertheless, I cannot accept the patch, since:

1) Neither upstream execjs pulls in any JS framework and the choice is up to user.
2) I don't want to force any non-required dependencies. E.g. if we go with therubyracer, but somebody wants to use NodeJS instead, there would be no way how to get rid of therubyracer package from the system. This is unacceptable (especially considering how much dependencies might be pulled in due to this).

The solution for F21 and older is to use comps and I believe that therubyracer is included in rubyonrails group.

For F22, I would consider Recommends dependencies instead of Requires.

(In reply to Vít Ondruch from comment #4)
> I understand your concern and intention. Nevertheless, I cannot accept the
> patch, since:
> 
> 1) Neither upstream execjs pulls in any JS framework and the choice is up to
> user.

On secondary arches, there currently is NO choice, the only upstream-supported JS engine available is JSC.

> 2) I don't want to force any non-required dependencies. E.g. if we go with
> therubyracer, but somebody wants to use NodeJS instead, there would be no
> way how to get rid of therubyracer package from the system. This is
> unacceptable (especially considering how much dependencies might be pulled
> in due to this).

Both therubyracer and nodejs require v8, so the only "extra" dependency in such a scenario would be rubygem-ref:

http://koji.fedoraproject.org/koji/rpminfo?rpmID=5484240
http://koji.fedoraproject.org/koji/rpminfo?rpmID=5768388

> The solution for F21 and older is to use comps and I believe that
> therubyracer is included in rubyonrails group.

That neither helps nor works for secondary arches.

Keep in mind that, due to the runtime tests in %check, that execjs currently cannot even be rebuilt on a secondary arch, e.g.:

http://arm.koji.fedoraproject.org/koji/taskinfo?taskID=2796540

At the minimum, everything but the added Requires: is necessary to make this package both build and run (after installing jsc) on secondary arches.

(In reply to Yaakov Selkowitz from comment #5)
> (In reply to Vít Ondruch from comment #4)
> > I understand your concern and intention. Nevertheless, I cannot accept the
> > patch, since:
> > 
> > 1) Neither upstream execjs pulls in any JS framework and the choice is up to
> > user.
> 
> On secondary arches, there currently is NO choice, the only
> upstream-supported JS engine available is JSC.

If JSC works, it makes sense to enable it by applying your patch. It also makes sense to ask upstream to support JSC not only on Macs, since it seems to be issue for other platforms as well [1].

> Keep in mind that, due to the runtime tests in %check, that execjs currently
> cannot even be rebuilt on a secondary arch, e.g.:
> 
> http://arm.koji.fedoraproject.org/koji/taskinfo?taskID=2796540

We should make it build, definitely.

Unfortunately, trying JSC on x86_64, it just segfaults. Moreover, since the jsc executable is available just in -devel subpackage, I am not sure how well it is supported.

Would you mind to pursue webkitgtk4 maintainer to split the JSC into more reasonable subpackage and make it work actually?


[1] https://github.com/sstephenson/execjs/issues/154#issuecomment-67840655

(In reply to Vít Ondruch from comment #6)
> If JSC works, it makes sense to enable it by applying your patch. It also
> makes sense to ask upstream to support JSC not only on Macs, since it seems
> to be issue for other platforms as well [1].

The patch would need a bit of work to upstream, but it would be easier if we could rely on just "jsc" from webkitgtk4 and not jsc-{1,3} from the now-deprecated webkitgtk{,3}.

> Unfortunately, trying JSC on x86_64, it just segfaults.

The examples shown at https://github.com/sstephenson/execjs WFM on both x86_64 and aarch64 (after patching runtimes.rb).  What exactly did you do?  

> Moreover, since the jsc executable is available just in -devel subpackage, I 
> am not sure how well it is supported.

I imagine that was due to lack of consumers.

> Would you mind to pursue webkitgtk4 maintainer to split the JSC into more
> reasonable subpackage and make it work actually?

Filed bug 1176677.

(In reply to Yaakov Selkowitz from comment #7)
> (In reply to Vít Ondruch from comment #6)
> > If JSC works, it makes sense to enable it by applying your patch. It also
> > makes sense to ask upstream to support JSC not only on Macs, since it seems
> > to be issue for other platforms as well [1].
> 
> The patch would need a bit of work to upstream, but it would be easier if we
> could rely on just "jsc" from webkitgtk4 and not jsc-{1,3} from the
> now-deprecated webkitgtk{,3}.

Yes, sure. I'm interested what upstream thinks about this, since there are more directions in which the patch could be modified.

> > Unfortunately, trying JSC on x86_64, it just segfaults.
> 
> The examples shown at https://github.com/sstephenson/execjs WFM on both
> x86_64 and aarch64 (after patching runtimes.rb).  What exactly did you do? 

This is my SRPM: 

https://vondruch.fedorapeople.org/rubygem-execjs-2.2.2-1.fc22.src.rpm

And the testsuite fails entirely. In a background, the test suite creates file with content such as:

$ cat /tmp/execjs20141222-11666-14a8cabjs
          (function(program, execJS) { execJS(program) })(function() {
  return eval("(function(){ \n1 })()");
}, function(program) {
  var output;
  try {
    result = program();
    if (typeof result == 'undefined' && result !== null) {
      print('["ok"]');
    } else {
      try {
        print(JSON.stringify(['ok', result]));
      } catch (err) {
        print('["err"]');
      }
    }
  } catch (err) {
    print(JSON.stringify(['err', '' + err]));
  }
});



and runs:

$ jsc /tmp/execjs20141222-11666-14a8cabjs
Segmentation fault (core dumped)


> > Would you mind to pursue webkitgtk4 maintainer to split the JSC into more
> > reasonable subpackage and make it work actually?
> 
> Filed bug 1176677.

Thx!

(In reply to Vít Ondruch from comment #8)
> (In reply to Yaakov Selkowitz from comment #7)
> > (In reply to Vít Ondruch from comment #6)
> > > Unfortunately, trying JSC on x86_64, it just segfaults.
> > 
> > The examples shown at https://github.com/sstephenson/execjs WFM on both
> > x86_64 and aarch64 (after patching runtimes.rb).  What exactly did you do? 
> 
> This is my SRPM: 
> 
> https://vondruch.fedorapeople.org/rubygem-execjs-2.2.2-1.fc22.src.rpm
> 
> And the testsuite fails entirely.

Only on rawhide.  On F21 -- which is what I was testing in the first place -- it passes if you uncomment the LANG=en_US.utf8 line.

Since upstream 2.5.0 (released earlier this month), ExecJS now supports Duktape as a backend.  F21+ are all at 2.2.0, so I haven't tested ExecJS with it, but Duktape itself does seem to work properly on AArch64.  Therefore, the combination of a rubygem-execjs version bump and the addition of rubygem-duktape (which will require figuring out how to handle the bundled duktape.c) would provide a lightweight and portable alternative for all arches.

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Does the switch from therubyracer to node for the test suite [1] changes the situation? Is NodeJS supported on all architectures now?


[1] http://pkgs.fedoraproject.org/cgit/rpms/rubygem-execjs.git/commit/?id=3c0f1ff0c98c30d501659beea540aa206f2c3d66

nodejs since 4.x (F24) is supported on both aarch64 and ppc64{,le}.

I don't think there is any action needed at this point. NodeJs is used to execute the test suite and it is available on all supported platforms.