Re: [ext] Re: failed to install the python-umap-learn package

2020-09-30 Thread hong...@mdc-berlin.de
Dear Simon,


Thank you so much, the build was successful using:

guix time-machine --commit=cac674d99dc4a332e6210c57ec7f1b8164f66642 \

  -C /tmp/chan.scm \

  -- package -p .guix-profile -i python-umap-learn



best regards,

Hong



From: zimoun 
Sent: 30 September 2020 15:54
To: Li, Hong
Cc: Ludovic Courtès; help-guix@gnu.org
Subject: Re: [ext] Re: failed to install the python-umap-learn package

Dear,

Please run:

   echo "%default-channels" > /tmp/chan.scm
   guix time-machine --commit=cac674d99dc4a332e6210c57ec7f1b8164f66642 \
  -C /tmp/chan.scm \
  -- package -i pyhton-umap-learn

This will fix your initial issue, I guess.

Exactly, this works in the end.

> [h...@max-login3.mdc-berlin.net:~] $ guix time-machine 
> --commit=cd5406effa34fa5cfda7eb7bbd2ccaf5201cf523 -C /tmp/chan.scm  -- 
> package -p guix/new/.guix-profile -i  python-umap-learn

I have not checked in your previous email, but it is the wrong commit.

I tried all succeeded commits, and this commit is the first succeeded one from 
2020-01-07 03:09:35
https://data.guix.gnu.org/repository/1/branch/master/package/python-umap-learn/output-history


> build of 
> /gnu/store/vxf3qwhkahgzfhwp6c63vm8vky9fj5bl-python-scikit-learn-0.20.4.drv 
> failed
> View build log at 
> '/gnu/var/log/guix/drvs/vx/f3qwhkahgzfhwp6c63vm8vky9fj5bl-python-scikit-learn-0.20.4.drv'.
> guix package: error: build of 
> `/gnu/store/vxf3qwhkahgzfhwp6c63vm8vky9fj5bl-python-scikit-learn-0.20.4.drv' 
> failed

It could be expected since the package 'python-scikit-learn' is broken:

https://data.guix.gnu.org/repository/1/branch/master/package/python-scikit-learn/output-history

especially for the commit you are trying (which is not the one you
need for the working 'python-umap-learn' package).


> Why this commit?  'python-umap-learn' should be broken
>
> This commit is the most recent succeeded build from 2020-04-18 19:24:20, you 
> also suggested this commit before.

Ah yeah but then what was the previous commit
cd5406effa34fa5cfda7eb7bbd2ccaf5201cf523? :-)


> [h...@max-login3.mdc-berlin.net:~] $ guix time-machine 
> --commit=cac674d99dc4a332e6210c57ec7f1b8164f66642 -- help
> Updating channel 'guix' from Git repository at 
> 'https://git.savannah.gnu.org/git/guix.git'...
> Updating channel 'guix-bimsb' from Git repository at 
> 'https://github.com/BIMSBbioinfo/guix-bimsb.git'...
> Updating channel 'guix-past' from Git repository at 
> 'https://gitlab.inria.fr/guix-hpc/guix-past'...
> Updating channel 'guix-bimsb-nonfree' from Git repository at 
> 'https://github.com/BIMSBbioinfo/guix-bimsb-nonfree.git'...
[...]
> /builder for 
> `/gnu/store/yaj4m68r6l9jhdb767psz79fm84hb6x6-guix-package-cache.drv' failed 
> to produce output path 
> `/gnu/store/9vpcvp00acz4lvglfs1k69a4i05p5hbw-guix-package-cache'
> build of /gnu/store/yaj4m68r6l9jhdb767psz79fm84hb6x6-guix-package-cache.drv 
> failed
> View build log at 
> '/gnu/var/log/guix/drvs/ya/j4m68r6l9jhdb767psz79fm84hb6x6-guix-package-cache.drv'.
> cannot build derivation 
> `/gnu/store/zz2557r32hsq2ksa53ix4ygaskkrs2qi-profile.drv': 1 dependencies 
> couldn't be built
> guix time-machine: error: build of 
> `/gnu/store/zz2557r32hsq2ksa53ix4ygaskkrs2qi-profile.drv' failed

This comes from the extra 3 channels you added.  If you remove them
(see above), then it should work, I guess.


Hope that helps,
simon


Re: [ext] Re: failed to install the python-umap-learn package

2020-09-30 Thread zimoun
Dear,

Please run:

   echo "%default-channels" > /tmp/chan.scm
   guix time-machine --commit=cac674d99dc4a332e6210c57ec7f1b8164f66642 \
  -C /tmp/chan.scm \
  -- package -i pyhton-umap-learn

This will fix your initial issue, I guess.



> [h...@max-login3.mdc-berlin.net:~] $ guix time-machine 
> --commit=cd5406effa34fa5cfda7eb7bbd2ccaf5201cf523 -C /tmp/chan.scm  -- 
> package -p guix/new/.guix-profile -i  python-umap-learn

I have not checked in your previous email, but it is the wrong commit.

> build of 
> /gnu/store/vxf3qwhkahgzfhwp6c63vm8vky9fj5bl-python-scikit-learn-0.20.4.drv 
> failed
> View build log at 
> '/gnu/var/log/guix/drvs/vx/f3qwhkahgzfhwp6c63vm8vky9fj5bl-python-scikit-learn-0.20.4.drv'.
> guix package: error: build of 
> `/gnu/store/vxf3qwhkahgzfhwp6c63vm8vky9fj5bl-python-scikit-learn-0.20.4.drv' 
> failed

It could be expected since the package 'python-scikit-learn' is broken:

https://data.guix.gnu.org/repository/1/branch/master/package/python-scikit-learn/output-history

especially for the commit you are trying (which is not the one you
need for the working 'python-umap-learn' package).


> Why this commit?  'python-umap-learn' should be broken
>
> This commit is the most recent succeeded build from 2020-04-18 19:24:20, you 
> also suggested this commit before.

Ah yeah but then what was the previous commit
cd5406effa34fa5cfda7eb7bbd2ccaf5201cf523? :-)


> [h...@max-login3.mdc-berlin.net:~] $ guix time-machine 
> --commit=cac674d99dc4a332e6210c57ec7f1b8164f66642 -- help
> Updating channel 'guix' from Git repository at 
> 'https://git.savannah.gnu.org/git/guix.git'...
> Updating channel 'guix-bimsb' from Git repository at 
> 'https://github.com/BIMSBbioinfo/guix-bimsb.git'...
> Updating channel 'guix-past' from Git repository at 
> 'https://gitlab.inria.fr/guix-hpc/guix-past'...
> Updating channel 'guix-bimsb-nonfree' from Git repository at 
> 'https://github.com/BIMSBbioinfo/guix-bimsb-nonfree.git'...
[...]
> /builder for 
> `/gnu/store/yaj4m68r6l9jhdb767psz79fm84hb6x6-guix-package-cache.drv' failed 
> to produce output path 
> `/gnu/store/9vpcvp00acz4lvglfs1k69a4i05p5hbw-guix-package-cache'
> build of /gnu/store/yaj4m68r6l9jhdb767psz79fm84hb6x6-guix-package-cache.drv 
> failed
> View build log at 
> '/gnu/var/log/guix/drvs/ya/j4m68r6l9jhdb767psz79fm84hb6x6-guix-package-cache.drv'.
> cannot build derivation 
> `/gnu/store/zz2557r32hsq2ksa53ix4ygaskkrs2qi-profile.drv': 1 dependencies 
> couldn't be built
> guix time-machine: error: build of 
> `/gnu/store/zz2557r32hsq2ksa53ix4ygaskkrs2qi-profile.drv' failed

This comes from the extra 3 channels you added.  If you remove them
(see above), then it should work, I guess.


Hope that helps,
simon



Re: [ext] Re: failed to install the python-umap-learn package

2020-09-30 Thread hong...@mdc-berlin.de
Dear Simon,


Now the error is coming from python-scikit-learn-0.20.4.

Please find my answers and comments inline.


best regards,

Hong



From: zimoun 
Sent: 30 September 2020 14:11
To: Li, Hong
Cc: Ludovic Courtès; help-guix@gnu.org
Subject: Re: [ext] Re: failed to install the python-umap-learn package

On Wed, 30 Sep 2020 at 13:41, hong...@mdc-berlin.de
 wrote:

> $ guix time-machine --commit=cd5406effa34fa5cfda7eb7bbd2ccaf5201cf523 -- 
> package -p guix/new/.guix-profile -i python3 python-umap-learn
> Updating channel 'guix' from Git repository at 
> 'https://git.savannah.gnu.org/git/guix.git'...
> Updating channel 'guix-bimsb' from Git repository at 
> 'https://github.com/BIMSBbioinfo/guix-bimsb.git'...
> Updating channel 'guix-past' from Git repository at 
> 'https://gitlab.inria.fr/guix-hpc/guix-past'...
> Updating channel 'guix-bimsb-nonfree' from Git repository at 
> 'https://github.com/BIMSBbioinfo/guix-bimsb-nonfree.git'...

[...]

> |builder for `/gnu/store/jvffmvaz1rm0q11c57wmsp08h0slj9ym-guix-past.drv' 
> failed to produce output path 
> `/gnu/store/gg8fs00h7vqx29icijxpd7w99z1p8lmf-guix-past'
> build of /gnu/store/jvffmvaz1rm0q11c57wmsp08h0slj9ym-guix-past.drv failed

The error comes from the channel 'guix-past'.  Well, I will investigate later...
Therefore, you have to turn off this channel.  The simplest is to run:

echo "%default-channels" > /tmp/chan.scm
guix time-machine --commit=cd5406effa34fa5cfda7eb7bbd2ccaf5201cf523 \
  -C /tmp/chan.scm \
 -- package -p guix/new/.guix-profile -i python3 python-umap-learn

Hope that helps.

[h...@max-login3.mdc-berlin.net:~] $ guix time-machine 
--commit=cd5406effa34fa5cfda7eb7bbd2ccaf5201cf523 -C /tmp/chan.scm  -- package 
-p guix/new/.guix-profile -i  python-umap-learn
Updating channel 'guix' from Git repository at 
'https://git.savannah.gnu.org/git/guix.git'...
guile: warning: failed to install locale
guix package: warning: Consider running 'guix pull' followed by
'guix package -u' to get up-to-date packages and security updates.

updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
The following package will be installed:
   python-umap-learn0.3.10  
/gnu/store/yg68y32h1fhngn8mqpfyc8lzfg25df48-python-umap-learn-0.3.10

substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
building /gnu/store/fzcysynrdkz52f077c4hbrdmpwkb01nx-python-numba-0.46.0.drv...
updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
building 
/gnu/store/vxf3qwhkahgzfhwp6c63vm8vky9fj5bl-python-scikit-learn-0.20.4.drv...
100% 'check' 
[###]builder
 for 
`/gnu/store/vxf3qwhkahgzfhwp6c63vm8vky9fj5bl-python-scikit-learn-0.20.4.drv' 
failed with exit code 1
build of 
/gnu/store/vxf3qwhkahgzfhwp6c63vm8vky9fj5bl-python-scikit-learn-0.20.4.drv 
failed
View build log at 
'/gnu/var/log/guix/drvs/vx/f3qwhkahgzfhwp6c63vm8vky9fj5bl-python-scikit-learn-0.20.4.drv'.
guix package: error: build of 
`/gnu/store/vxf3qwhkahgzfhwp6c63vm8vky9fj5bl-python-scikit-learn-0.20.4.drv' 
failed

> [h...@max-login3.mdc-berlin.net:~] $ guix time-machine 
> --commit=cac674d99dc4a332e6210c57ec7f1b8164f66642 -- package -p 
> guix/new/.guix-profile -i python3 python-umap-learn

Why this commit?  'python-umap-learn' should be broken

This commit is the most recent succeeded build from 2020-04-18 19:24:20, you 
also suggested this commit before.

> Updating channel 'guix' from Git repository at 
> 'https://git.savannah.gnu.org/git/guix.git'...
> Updating channel 'guix-bimsb' from Git repository at 
> 'https://github.com/BIMSBbioinfo/guix-bimsb.git'...
> Updating channel 'guix-past' from Git repository at 
> 'https://gitlab.inria.fr/guix-hpc/guix-past'...
> Updating channel 'guix-bimsb-nonfree' from Git repository at 
> 'https://github.com/BIMSBbioinfo/guix-bimsb-nonfree.git'...
> Computing Guix derivation for 'x86_64-linux'...  WARNING: (guix build 
> emacs-build-system): imported module (guix build utils) overrides core 
> binding `delete'|
> The following derivation will be built:
>/gnu/store/zz2557r32hsq2ksa53ix4ygaskkrs2qi-profile.drv
> The following profile hook will be built:
>/gnu/store/yaj4m68r6l9jhdb767psz79fm84hb6x6-guix-package-cache.drv
> building package cache...
> /builder for 
> `/gnu/store/yaj4m68r6l9jhdb767psz79fm84hb6x6-guix-package-cache.drv' failed 
> to produce output path 
> `/gnu/store/9vpcvp00acz4lvglfs1k69a4i05p5hbw-guix-package-cache'
> build of /gnu/store/yaj4m68r6l9jhdb767psz79fm84hb6x6-guix-package-cache.drv 
> failed
> View build log at 
> '/gnu/var/log/guix/drvs/ya/j4m68r6l9jhdb767psz79fm84hb6x6-guix-package-cache

Re: [ext] Re: failed to install the python-umap-learn package

2020-09-30 Thread zimoun
On Wed, 30 Sep 2020 at 13:41, hong...@mdc-berlin.de
 wrote:

> $ guix time-machine --commit=cd5406effa34fa5cfda7eb7bbd2ccaf5201cf523 -- 
> package -p guix/new/.guix-profile -i python3 python-umap-learn
> Updating channel 'guix' from Git repository at 
> 'https://git.savannah.gnu.org/git/guix.git'...
> Updating channel 'guix-bimsb' from Git repository at 
> 'https://github.com/BIMSBbioinfo/guix-bimsb.git'...
> Updating channel 'guix-past' from Git repository at 
> 'https://gitlab.inria.fr/guix-hpc/guix-past'...
> Updating channel 'guix-bimsb-nonfree' from Git repository at 
> 'https://github.com/BIMSBbioinfo/guix-bimsb-nonfree.git'...

[...]

> |builder for `/gnu/store/jvffmvaz1rm0q11c57wmsp08h0slj9ym-guix-past.drv' 
> failed to produce output path 
> `/gnu/store/gg8fs00h7vqx29icijxpd7w99z1p8lmf-guix-past'
> build of /gnu/store/jvffmvaz1rm0q11c57wmsp08h0slj9ym-guix-past.drv failed

The error comes from the channel 'guix-past'.  Well, I will investigate later...
Therefore, you have to turn off this channel.  The simplest is to run:

echo "%default-channels" > /tmp/chan.scm
guix time-machine --commit=cd5406effa34fa5cfda7eb7bbd2ccaf5201cf523 \
  -C /tmp/chan.scm \
 -- package -p guix/new/.guix-profile -i python3 python-umap-learn

Hope that helps.


> [h...@max-login3.mdc-berlin.net:~] $ guix time-machine 
> --commit=cac674d99dc4a332e6210c57ec7f1b8164f66642 -- package -p 
> guix/new/.guix-profile -i python3 python-umap-learn

Why this commit?  'python-umap-learn' should be broken

> Updating channel 'guix' from Git repository at 
> 'https://git.savannah.gnu.org/git/guix.git'...
> Updating channel 'guix-bimsb' from Git repository at 
> 'https://github.com/BIMSBbioinfo/guix-bimsb.git'...
> Updating channel 'guix-past' from Git repository at 
> 'https://gitlab.inria.fr/guix-hpc/guix-past'...
> Updating channel 'guix-bimsb-nonfree' from Git repository at 
> 'https://github.com/BIMSBbioinfo/guix-bimsb-nonfree.git'...
> Computing Guix derivation for 'x86_64-linux'...  WARNING: (guix build 
> emacs-build-system): imported module (guix build utils) overrides core 
> binding `delete'|
> The following derivation will be built:
>/gnu/store/zz2557r32hsq2ksa53ix4ygaskkrs2qi-profile.drv
> The following profile hook will be built:
>/gnu/store/yaj4m68r6l9jhdb767psz79fm84hb6x6-guix-package-cache.drv
> building package cache...
> /builder for 
> `/gnu/store/yaj4m68r6l9jhdb767psz79fm84hb6x6-guix-package-cache.drv' failed 
> to produce output path 
> `/gnu/store/9vpcvp00acz4lvglfs1k69a4i05p5hbw-guix-package-cache'
> build of /gnu/store/yaj4m68r6l9jhdb767psz79fm84hb6x6-guix-package-cache.drv 
> failed
> View build log at 
> '/gnu/var/log/guix/drvs/ya/j4m68r6l9jhdb767psz79fm84hb6x6-guix-package-cache.drv'.
> cannot build derivation 
> `/gnu/store/zz2557r32hsq2ksa53ix4ygaskkrs2qi-profile.drv': 1 dependencies 
> couldn't be built

I do not know why it returns an error here.  What happens if you run:

  guix time-machine --commit=cac674d99dc4a332e6210c57ec7f1b8164f66642 -- help

?

All the best,
simon



Re: [ext] Re: failed to install the python-umap-learn package

2020-09-30 Thread hong...@mdc-berlin.de
/zz2557r32hsq2ksa53ix4ygaskkrs2qi-profile.drv' failed


best regards,

Hong


From: Ludovic Courtès 
Sent: 30 September 2020 10:56:24
To: zimoun
Cc: Li, Hong; help-guix@gnu.org
Subject: [ext] Re: failed to install the python-umap-learn package

Hi,

zimoun  skribis:

> Thank you for pointing out the issue.  Using the Guix Data Service,
>
>   
> https://data.guix.gnu.org/repository/1/branch/master/package/python-umap-learn/output-history

[...]

> From the Guix Data Service, the first offending commit is
> cac674d99dc4a332e6210c57ec7f1b8164f66642 which updates python-cython.

Neat!  We should put that that to good use somehow to quickly notice and
fix regressions: with IRC/email notifications, ‘guix weather’ reporting
info from the Data Service, things like that.

Ludo’.


Re: failed to install the python-umap-learn package

2020-09-30 Thread Ludovic Courtès
Hi,

zimoun  skribis:

> Thank you for pointing out the issue.  Using the Guix Data Service,
>
>   
> https://data.guix.gnu.org/repository/1/branch/master/package/python-umap-learn/output-history

[...]

> From the Guix Data Service, the first offending commit is
> cac674d99dc4a332e6210c57ec7f1b8164f66642 which updates python-cython.

Neat!  We should put that that to good use somehow to quickly notice and
fix regressions: with IRC/email notifications, ‘guix weather’ reporting
info from the Data Service, things like that.

Ludo’.



Re: failed to install the python-umap-learn package

2020-09-29 Thread zimoun
Dear Hong Li,


On Tue, 29 Sep 2020 at 16:09, Ludovic Courtès  wrote:
> "hong...@mdc-berlin.de"  skribis:
>
> > I had a failure when installing python-umap-learn in guix. It took very 
> > long time in the 'check' phase.

Usually, if "guix weather python-umap-learn" says that there is no
substitute, then it is a bad sign. :-)


> > The error does not change before and after 'guix pull'. Could you please 
> > tell me how to solve this problem?

Thank you for pointing out the issue.  Using the Guix Data Service,

  
https://data.guix.gnu.org/repository/1/branch/master/package/python-umap-learn/output-history

one can see the versions which build and the ones which fail (mainly
because dependencies, apparently).  One the last Succeeded row, you
can click on the revision 2020-04-18 19:24:20 which indicates the last
known commit where python-umap-learn builds.  Therefore, you can run:

   guix time-machine --commit=cac674d99dc4a332e6210c57ec7f1b8164f66642 \
  -- package -i pyhton-umap-learn


Hope that helps.


> It would seem that one of the tests of python-numba is failing, perhaps
> in a non-deterministic way.

>From the Guix Data Service, the first offending commit is
cac674d99dc4a332e6210c57ec7f1b8164f66642 which updates python-cython.


All the best,
simon



Re: failed to install the python-umap-learn package

2020-09-29 Thread Ludovic Courtès
Hi,

"hong...@mdc-berlin.de"  skribis:

> I had a failure when installing python-umap-learn in guix. It took very long 
> time in the 'check' phase.
>
> The error does not change before and after 'guix pull'. Could you please tell 
> me how to solve this problem?
>
> Thanks in advance! Please see the screen output below:
>
>
> $ guix package -i python-umap-learn
>
> The following package will be installed:
>python-umap-learn 0.3.10
>
> The following derivations will be built:
>/gnu/store/4sbifbl79yy6xnbnkvj0hvc3i2mp6jcj-python-umap-learn-0.3.10.drv
>/gnu/store/ra7xx13ni736p0kvcsbhsl0g9yhy4d68-python-numba-0.46.0.drv
> building 
> /gnu/store/ra7xx13ni736p0kvcsbhsl0g9yhy4d68-python-numba-0.46.0.drv...
> - 'check' phasebuilder for 
> `/gnu/store/ra7xx13ni736p0kvcsbhsl0g9yhy4d68-python-numba-0.46.0.drv' failed 
> with exit code 1
> build of /gnu/store/ra7xx13ni736p0kvcsbhsl0g9yhy4d68-python-numba-0.46.0.drv 
> failed
> View build log at 
> '/gnu/var/log/guix/drvs/ra/7xx13ni736p0kvcsbhsl0g9yhy4d68-python-numba-0.46.0.drv'.
> guix package: error: build of 
> `/gnu/store/ra7xx13ni736p0kvcsbhsl0g9yhy4d68-python-numba-0.46.0.drv' failed

It would seem that one of the tests of python-numba is failing, perhaps
in a non-deterministic way.

As a stopgap, you should be able to run:

  guix install python-umap-learn --without-tests=python-numba

Note that ‘--without-tests’ was added just a couple of days ago, so you
may need to run ‘guix pull’ to get a recent-enough Guix:

  
https://guix.gnu.org/manual/devel/en/html_node/Package-Transformation-Options.html

HTH,
Ludo’.



failed to install the python-umap-learn package

2020-09-21 Thread hong...@mdc-berlin.de
Dear developers,


I had a failure when installing python-umap-learn in guix. It took very long 
time in the 'check' phase.

The error does not change before and after 'guix pull'. Could you please tell 
me how to solve this problem?

Thanks in advance! Please see the screen output below:


$ guix package -i python-umap-learn

The following package will be installed:
   python-umap-learn 0.3.10

The following derivations will be built:
   /gnu/store/4sbifbl79yy6xnbnkvj0hvc3i2mp6jcj-python-umap-learn-0.3.10.drv
   /gnu/store/ra7xx13ni736p0kvcsbhsl0g9yhy4d68-python-numba-0.46.0.drv
building /gnu/store/ra7xx13ni736p0kvcsbhsl0g9yhy4d68-python-numba-0.46.0.drv...
- 'check' phasebuilder for 
`/gnu/store/ra7xx13ni736p0kvcsbhsl0g9yhy4d68-python-numba-0.46.0.drv' failed 
with exit code 1
build of /gnu/store/ra7xx13ni736p0kvcsbhsl0g9yhy4d68-python-numba-0.46.0.drv 
failed
View build log at 
'/gnu/var/log/guix/drvs/ra/7xx13ni736p0kvcsbhsl0g9yhy4d68-python-numba-0.46.0.drv'.
guix package: error: build of 
`/gnu/store/ra7xx13ni736p0kvcsbhsl0g9yhy4d68-python-numba-0.46.0.drv' failed

$ guix package -i python-numba

The following package will be installed:
   python-numba 0.46.0

The following derivation will be built:
   /gnu/store/ra7xx13ni736p0kvcsbhsl0g9yhy4d68-python-numba-0.46.0.drv
building /gnu/store/ra7xx13ni736p0kvcsbhsl0g9yhy4d68-python-numba-0.46.0.drv...
- 'check' phasebuilder for 
`/gnu/store/ra7xx13ni736p0kvcsbhsl0g9yhy4d68-python-numba-0.46.0.drv' failed 
with exit code 1
build of /gnu/store/ra7xx13ni736p0kvcsbhsl0g9yhy4d68-python-numba-0.46.0.drv 
failed
View build log at 
'/gnu/var/log/guix/drvs/ra/7xx13ni736p0kvcsbhsl0g9yhy4d68-python-numba-0.46.0.drv'.
guix package: error: build of 
`/gnu/store/ra7xx13ni736p0kvcsbhsl0g9yhy4d68-python-numba-0.46.0.drv' failed

$ guix -V
guix (GNU Guix) 90492a9f13b4b8eaa6025d5a18e0b130cf257dbe

best regards,
Hong