Missing python in chroot

[Simon Que]

My chroot is missing python. /usr/bin/python points to python-wrapper, but python-wrapper doesn't exist.

I don't know at what point it broke. I did a repo sync, exited and re-entered the chroot, and ran update_chroot, but update_chroot requires python. So I'm stuck with a busted chroot.

Any recovery tips would be greatly appreciated.

Simon

[Yunlian Jiang]

Can you try to remove the chroot and recreate the chroot?

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[Stéphane Marchesin]

I'm also getting this. Is it related to this change?

https://chromium-review.googlesource.com/#/c/583973/

[Stéphane Marchesin]

FWIW I worked around it by doing cp /usr/bin/python2 /usr/bin/python.

[Simon Que]

I followed the suggestion of recreating the chroot, but that was a very long process and I don't recommend it.

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[Prathmesh Prabhu Chromium]

+Eric Caruso 

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[Daniel Kurtz]

Argh.  This is almost definitely my fault.

It was actually this set of patches that change "app-admin/eselect-python" to "app-eselect/eselect-python":

https://chromium-review.googlesource.com/#/c/574040/

https://chromium-review.googlesource.com/#/c/573885/

Everything seems to be working on the bots and work when creating a new sdk.

However, there is race during update_chroot in an existing chroot where app-admin/eselect-python is unmerged first to resolve the app-eselect/eselect-python blocker (which removes python-wrapper), while in parallel a new python is being emerged, which fails b/c python-wrapper was just removed.  This results in a chroot without a working python.  Note that update_chroot is run automatically as an earlier step during both ./setup_board and ./build_packages.

Here is a bug to track this:

https://bugs.chromium.org/p/chromium/issues/detail?id=749933

As marcheu suggested, a workaround is to do something like this in the chroot:

sudo rm /usr/bin/python

sudo ln -s /usr/bin/python /usr/bin/python2

Looks like I know what I'll be investigating on my last day here in Taipei...

Sorry for the breakage.

-Dan

+Eric Caruso 

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[Tomasz Figa]

I think you might also want to execute "sudo eselect python python2.7" after the update_chroot succeeds, as it doesn't seem to bring the original symbol back and that could lead to your python selection being inconsistent with what is set in eselect python.

Best regards,

Tomasz

+Eric Caruso 

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[Tomasz Figa]

It's "sudo eselect python set python2.7" of course. Sorry for the noise.