the nix store may contain hardlinks: derivations may output them
directly, or users may be using store optimization which automatically
hardlinks identical files in the nix store.
The presence of these links are intended to be a 'transparent'
optimization. However, when creating a squashfs image, the image
will be different depending on whether hard links were present
on the filesystem, leading to reproducibility problems.
By passing '-no-hardlinks' to mksquashfs the files are stored
as duplicates in the squashfs image. Since squashfs has support
for duplicate files this does not lead to a larger image.
For more details see
https://github.com/NixOS/nixpkgs/issues/114331
The hydra tarball step would fail due to the nodes attribute not being
properly inherited. Since we can't execute all the tests and release
steps locally anymore (thanks to the JSONification and faster hydra
eval) these errors will probably keep in appearing.
This is hopefully the last of those introduced by me test runner
refactoring.
Error was seen on hydra (https://hydra.nixos.org/build/129282411):
> unpacking sources
> unpacking source archive /nix/store/bp95x52h6nv3j8apxrryyj2rviw682k1-source
> source root is source
> patching sources
> autoconfPhase
> No bootstrap, bootstrap.sh, configure.in or configure.ac. Assuming this is not an GNU Autotools package.
> configuring
> release name is nixpkgs-21.03pre249116.1088f059401
> git-revision is 1088f05940
> building
> no Makefile, doing nothing
> running tests
> warning: you did not specify '--add-root'; the result might be removed by the garbage collector
> warning: you did not specify '--add-root'; the result might be removed by the garbage collector
> checking Nixpkgs on i686-linux
> checking Nixpkgs on x86_64-linux
> checking Nixpkgs on x86_64-darwin
> checking eval-release.nix
> trace: `mkStrict' is obsolete; use `mkOverride 0' instead.
> trace: `lib.nixpkgsVersion` is deprecated, use `lib.version` instead!
> trace: warning: lib.readPathsFromFile is deprecated, use a list instead
> trace: Warning: `showVal` is deprecated and will be removed in the next release, please use `traceSeqN`
> trace: lib.zip is deprecated, use lib.zipAttrsWith instead
> checking find-tarballs.nix
> trace: `mkStrict' is obsolete; use `mkOverride 0' instead.
> trace: `lib.nixpkgsVersion` is deprecated, use `lib.version` instead!
> trace: warning: lib.readPathsFromFile is deprecated, use a list instead
> trace: Warning: `showVal` is deprecated and will be removed in the next release, please use `traceSeqN`
> trace: lib.zip is deprecated, use lib.zipAttrsWith instead
> error: while evaluating anonymous function at /build/source/maintainers/scripts/find-tarballs.nix:6:1, called from undefined position:
> while evaluating 'operator' at /build/source/maintainers/scripts/find-tarballs.nix:27:16, called from undefined position:
> while evaluating 'immediateDependenciesOf' at /build/source/maintainers/scripts/find-tarballs.nix:39:29, called from /build/source/maintainers/scripts/find-tarballs.nix:27:44:
> while evaluating anonymous function at /build/source/lib/attrsets.nix:234:10, called from undefined position:
> while evaluating anonymous function at /build/source/maintainers/scripts/find-tarballs.nix:40:37, called from /build/source/lib/attrsets.nix:234:16:
> while evaluating 'derivationsIn' at /build/source/maintainers/scripts/find-tarballs.nix:42:19, called from /build/source/maintainers/scripts/find-tarballs.nix:40:40:
> while evaluating 'canEval' at /build/source/maintainers/scripts/find-tarballs.nix:48:13, called from /build/source/maintainers/scripts/find-tarballs.nix:43:9:
> while evaluating the attribute 'nodes' at /build/source/nixos/lib/testing-python.nix:195:23:
> attribute 'nodes' missing, at /build/source/nixos/lib/testing-python.nix:193:16
> build time elapsed: 0m0.122s 0m0.043s 17m51.526s 0m56.668s
> builder for '/nix/store/96rk3c74vrk6m3snm7n6jhis3j640pn4-nixpkgs-tarball-21.03pre249116.1088f059401.drv' failed with exit code 1
In 5500dc8 we introduced the --keep-vm-state flag and defaulted to that
flag not being set. This lead to the `runInMachine` tests not longer
working and that going unnoticed for quite some time now.
Previously you would be able to override only the QEMU package to be
used in the test runner. Frankly that doesn't help a lot if you are
trying to get a graphical session. The graphical session requires the
option in the NixOS module system to bet set to the correct QEMU
package.
In this commit I moved most of the test node configuration and
transformations into the `mkDriver` function (previously called
`driver`). The motivation was to be able to create a `driver` instance
with a given QEMU package that will be used consistently througout the
test expression.
According to Python documentation [0], `bufsize=1` is only meaningful in
text mode. As we don't pass in an argument called `universal_newlines`,
`encoding`, `errors` or `text` the file objects aren't opened in text
mode, which means the argument is ignored with a warning in Python 3.8.
line buffering (buffering=1) isn't supported in binary mode,
the default buffer size will be used
This commit removes this warning that appared when using
interactive test driver built with `-A driver`. This is done by
removing `bufsize=1` from Popen calls.
The default parameter when unspecified for `bufsize` is `-1` which
according to the documentation will be interpreted as
`io.DEFAULT_BUFFER_SIZE`. As mentioned by a warning, Python already
uses default buffer size when providing `buffering=1` parameter for
file objects not opened in text mode.
[0]: https://docs.python.org/3/library/subprocess.html#subprocess.Popen
For a lot of the work the non-interactive drivers are enough and it is
probably a good idea to keep it accessible for debugging without
touching the Nix expression.
Since we previously stripped down the features of `qemu_test` some of
the features users are used to while running tests through the (impure)
driver didn't work anymore. Most notably we lost support for graphical
output and audio. With this change the `driver` attribute uses are more
feature complete version of QEmu compared to the one used in the pure
Nix builds.
This gives us the best of both worlds. Users are able to see the
graphical windows of VMs while CI and regular nix builds do not have to
download all the (unnecessary) dependencies.
Since using flakes disallows the usage of <unstable> (which I use in
some tests), this adds an alternative. By setting specialArgs, all VMs
can get the `unstable` flake input as an arg. This is not possible with
extraConfigurations, as that would lead to infinite recursions.
ecb73fd555 introduced a new keepVmState
CLI flag for test-driver.py. This CLI flags gets forwarded to the
Machine class through create_machine.
It created a regression for the boot tests where __main__ end up not
being evaluated. See
https://github.com/NixOS/nixpkgs/pull/97346#issuecomment-690951837 for
bug report.
Defaulting keepVmState to false when __main__ ends up not being
evaluated.
The previous version of the code would only kick in if the state
directory path pointed at a *file*, which never occurs. Making that
codepath actually work reveals an ordering bug, which this patch fixes
as well.
It also replaces the confusing, imperative case log message "delete VM
state directory" with "deleting VM state directory".
Finally, we hint the user about how to prevent this deletion. IE. by
passing the --keep-vm-state flag.
Bug report:
https://github.com/NixOS/nixpkgs/pull/91046#issuecomment-685568750
Credit goes to Edef for the rebase on top of a recent nixpkgs commit
and for writing most of this commit message.
Co-authored-by: edef <edef@edef.eu>
This reverts commit 1bff6fe17c, reversing
changes made to 2995fa48cb.
There’s presumably nothing wrong with this PR, except that it
conflicts with reverting #96254 which broke several tests (#96699).
Signed-off-by: Anders Kaseorg <andersk@mit.edu>
With the Perl driver, machine.sleep(N) was doing a sleep on the guest
machine instead of the host machine. The new Python test driver however
uses time.sleep(), which instead sleeps on the host.
While this shouldn't make a difference most of the time, it *does*
however make a huge difference if the test machine is loaded and you're
sleeping for a minimum duration of eg. an animation.
I stumbled on this while porting most of all my tests to the new Python
test driver and particularily my video game tests failed on a fairly
loaded machine, whereas they don't with the Perl test driver.
Switching the sleep() method to sleep on the guest instead of the host
fixes this.
Signed-off-by: aszlig <aszlig@nix.build>
This appears to avoid requiring KVM when it’s not available. This is
what I originally though -cpu host did. Unfortunately not much
documentation available from the QEMU side on this, but this appears
to square with help:
$ qemu-system-x86 -cpu help
...
x86 host KVM processor with all supported host features
x86 max Enables all features supported by the accelerator in the current host
...
Whether we actually want to support this not clear, since this only
happens when your CPU doesn’t have full KVM support. Some Nix builders
are lying about kvm support though. Things aren’t too slow without it
though.
Fixes https://github.com/NixOS/nixpkgs/issues/85394
Alternative to https://github.com/NixOS/nixpkgs/pull/83920
- Give a more accurate description of how fileSystems.<name/>.neededForBoot
works
- Give a more detailed description of how fileSystems.<name/>.encrypted.keyFile
works
