Commit graph

3614 commits

Author SHA1 Message Date
Eelco Dolstra
c5c0617d6f Mention --no-sandbox if sandboxing is unsupported 2023-02-07 22:59:46 +01:00
Eelco Dolstra
bc1d9fd8b5 Check whether we can use PID namespaces
In unprivileged podman containers, /proc is not fully visible (there
are other filesystems mounted on subdirectories of /proc). Therefore
we can't mount a new /proc in the sandbox that matches the PID
namespace of the sandbox. So this commit automatically disables
sandboxing if /proc is not fully visible.
2023-02-07 22:51:53 +01:00
Eelco Dolstra
fb2f7f5dcc Fix auto-uid-allocation in Docker containers
This didn't work because sandboxing doesn't work in Docker. However,
the sandboxing check is done lazily - after clone(CLONE_NEWNS) fails,
we retry with sandboxing disabled. But at that point, we've already
done UID allocation under the assumption that user namespaces are
enabled.

So let's get rid of the "goto fallback" logic and just detect early
whether user / mount namespaces are enabled.

This commit also gets rid of a compatibility hack for some ancient
Linux kernels (<2.13).
2023-02-07 22:51:53 +01:00
Jörg Thalheim
f20d3726dd advertise transport encoding in http transfers to
tl;dr: With this 1 line change I was able to get a speedup of 1.5x on 1Gbit/s
wan connections by enabling zstd compression in nginx.

Also nix already supported all common compression format for http
transfer, webservers usually only enable them if they are advertised
through the Accept-Encoding header.

This pull requests makes nix advertises content compression support for
zstd, br, gzip and deflate.

It's particular useful to add transparent compression for binary caches
that serve packages from the host nix store in particular nix-serve,
nix-serve-ng and harmonia.

I tried so far gzip, brotli and zstd, whereas only zstd was able to bring
me performance improvements for 1Gbit/s WAN connections.

The following nginx configuration was used in combination with the
[zstd module](https://github.com/tokers/zstd-nginx-module) and
[harmonia](https://github.com/nix-community/harmonia/)

```nix
{
  services.nginx.virtualHosts."cache.yourhost.com" = {
    locations."/".extraConfig = ''
      proxy_pass http://127.0.0.1:5000;
      proxy_set_header Host $host;
      proxy_redirect http:// https://;
      proxy_http_version 1.1;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection $connection_upgrade;

      zstd on;
      zstd_types application/x-nix-archive;
    '';
  };
}
```

For testing I unpacked a linux kernel tarball to the nix store using
this command `nix-prefetch-url --unpack https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-6.1.8.tar.gz`.

Before:

```console
$ nix build && rm -rf /tmp/hello  && time ./result/bin/nix copy --no-check-sigs --from https://cache.thalheim.io --to 'file:///tmp/hello?compression=none' '/nix/store/j42mahch5f0jvfmayhzwbb88sw36fvah-linux-6.1.8.tar.gz'
warning: Git tree '/scratch/joerg/nix' is dirty

real    0m18,375s
user    0m2,889s
sys     0m1,558s
```

After:

```console
$ nix build && rm -rf /tmp/hello  && time ./result/bin/nix copy --no-check-sigs --from https://cache.thalheim.io --to 'file:///tmp/hello?compression=none' '/nix/store/j42mahch5f0jvfmayhzwb
b88sw36fvah-linux-6.1.8.tar.gz'

real    0m11,884s
user    0m4,130s
sys     0m1,439s
```

Signed-off-by: Jörg Thalheim <joerg@thalheim.io>

Update src/libstore/filetransfer.cc

Co-authored-by: Théophane Hufschmitt <7226587+thufschmitt@users.noreply.github.com>
2023-02-03 12:33:38 +00:00
Eelco Dolstra
dbe0748f97
Merge pull request #7739 from obsidiansystems/user-settings
Move `trustedUsers` and `allowedUsers` to separate config struct
2023-02-03 11:55:37 +01:00
John Ericson
a47e055e09 Move trustedUsers and allowedUsers to separate config struct
These settings are not needed for libstore at all, they are just used by
the nix daemon *command* for authorization on unix domain sockets. My
moving them to a new configuration struct just in that file, we avoid
them leaking anywhere else.

Also, it is good to break up the mammoth `Settings` struct in general.
Issue #5638 tracks this.

The message is not changed because I do not want to regress in
convenience to the user. Just saying "this connection is not trusted"
doesn't tell them out to fix the issue. The ideal thing to do would be
to somehow parameterize `processCommand` on how the error should be
displayed, so different sorts of connections can display different
information to the user based on how authentication is performed for the
connection in question. This, however, is a good bit more work, so it is
left for the future.

This came up with me thinking about the tcp:// store (#5265). The larger
project is not TCP *per se*, but the idea that it should be possible for
something else to manage access control to services like the Nix Daemon,
and those services simply trust or trust the incoming connection as they
are told. This is a more capability-oriented way of thinking about trust
than "every server implements its own auth separately" as we are used to today.

Its very great that libstore itself already implements just this model,
and so via this refactor I basically want to "enshrine" that so it
continues to be the case.
2023-02-02 14:17:24 -05:00
John Ericson
479c011784 Get rid of the authHook parameter on processConnection
This is (morally) dead code.

As @edolstra pointed out in
https://github.com/NixOS/nix/pull/5226#discussion_r1073470813, this is
no longer needed.

I created this in 8d4162ff9e, so it is
fitting that I now destroy it :).
2023-02-02 12:02:03 -05:00
Shea Levy
895c525d04
daemon: Warn on old clients passing unexpected plugin-files.
The setting itself was already ignored due to exception trying to set pluginFiles.
2023-02-02 06:03:45 -05:00
Shea Levy
92edc38369
Don't send plugin-files to the daemon.
This is radically unsafe and the daemon has already loaded its plugins
anyway.

Fixes cachix/devenv#276
2023-02-01 20:05:56 -05:00
Eelco Dolstra
57a4258426 Remove an unused capture 2023-02-01 20:27:35 +01:00
Théophane Hufschmitt
518da6c6a3
Merge pull request #7716 from obsidiansystems/small-storePath-cleanups
Separate `path.hh` from `content-address.hh`
2023-02-01 16:00:28 +01:00
Eelco Dolstra
b55a946d8d
Merge pull request #7717 from obsidiansystems/delete-dead-code
Delete dead code
2023-02-01 15:57:04 +01:00
Eelco Dolstra
14b0b9ea5a
Merge pull request #7203 from graham33/feature/cpp20
Proposal: Use C++20
2023-02-01 15:41:04 +01:00
Robert Hensing
c9b9260f34
Merge pull request #7713 from obsidiansystems/more-rapid-check
Add more property tests
2023-01-30 18:54:53 +01:00
John Ericson
e21aa43212 Delete dead code
The references set seems to have been unused since `LegacySSHStore`
references were first created in
caa5793b4a.

The method decls never were upstream, and accidentally added by me in
062533f7cd (probably due to `git rerere`).
Sorry!

This reduces the diff from #3746.
2023-01-30 11:29:01 -05:00
John Ericson
560142fec0 Make per-variant Arbitrary impls too
This is a nice idea that @roberth requested. If we could factor our a
generic `std::variant` impl as a follow-up it would be even better!
2023-01-30 10:56:00 -05:00
John Ericson
02e745ba5b Separate path.hh from content-address.hh
It is good to separate concerns; `StorePath` (in general) has nothing to
do with `ContentAddress` anyways.

This reduces the diff from #3746.
2023-01-30 10:14:03 -05:00
John Ericson
f3e272ba02 Avoid some StorePath <-> Path round trips
Avoid needless work and throwing away invariants.

These conversions date back to when `StorePath` was in Rust and there
were issues with it missing utility methods.
2023-01-30 09:37:57 -05:00
Eelco Dolstra
c79b1582a7
Merge pull request #5226 from NixOS/client-side-profiles
Move the default profiles to the user’s home
2023-01-30 12:21:47 +01:00
Théophane Hufschmitt
4aaf0ee52e
Merge branch 'master' into referenceablePaths 2023-01-30 10:31:00 +01:00
John Ericson
ecd3e4ebd7 More property tests
Also put proper comparison methods on `DerivedPath` and
`NixStringContextElem`, which is needed for the tests but good in
general.
2023-01-29 17:09:59 -05:00
John Ericson
ec0c0efec6 Allow unit test infra to be reused across libs' tests
This allows using Arbitrary "instances" defined in libstore-tests in
libexpr-tests, something we will leverage in a moment.
2023-01-29 13:52:57 -05:00
Solène Rapenne
6b2729c81e improve documentation about substituters and trusted users
Co-authored-by: Théophane Hufschmitt <theophane.hufschmitt@tweag.io>
2023-01-26 09:56:44 +01:00
Solène Rapenne
64951d9125 Update src/libstore/daemon.cc
Co-authored-by: Valentin Gagarin <valentin.gagarin@tweag.io>
2023-01-26 09:34:25 +01:00
Solène Rapenne
a96156c58f warnings: enhance the case of untrusted substituter for untrusted user 2023-01-26 09:34:25 +01:00
John Ericson
018e2571aa Test store paths, with property tests
The property test in fact found a bug: we were excluding numbers!
2023-01-23 07:05:50 -05:00
John Ericson
685395332d Better-scope Store forward declarations 2023-01-23 07:05:50 -05:00
John Ericson
7fe308c2f8 Add rapidcheck dependency for testing
Property tests are great!

Co-authored-by: Cole Helbling <cole.e.helbling@outlook.com>
2023-01-23 07:05:50 -05:00
Eelco Dolstra
75c89c3e5e Add test for OutputsSpec::Names
From @Ericson2314.
2023-01-18 16:34:37 +01:00
Eelco Dolstra
95cfd50d25 OutputSpec: Allow all valid output names
Fixes #7624.
2023-01-18 14:14:29 +01:00
John Ericson
3965b0f75f Try again to fix aarch64-linux build failure
f419ab48e6 was on the right track, but
there are a few more missing `raw()` calls to fix.
2023-01-17 09:14:17 -05:00
Théophane Hufschmitt
6bdf4edb77 Keep the default profile the same
It's used as the “system” profile in a bunch of places, so better not
touch it. Besides, it doesn't hurt to keep it since it's owned by root
any way, so it doesn't have the `chown` problem that the user profiles
had and that led to wanting to move them on the client-side.
2023-01-17 14:17:28 +01:00
Théophane Hufschmitt
c80621dbac Don't try to migrate existing profiles
Doing so would be more dangerous than useful, better leave them as-is if
they already exist
2023-01-17 14:17:28 +01:00
Théophane Hufschmitt
0601050755 Migrate the old profiles to the new location
Make sure that we don’t just create the new profiles directory, but that
we also migrate every existing profile to it.
2023-01-17 14:17:28 +01:00
Théophane Hufschmitt
a5919f4754 Move the default profiles to the user’s home
Rather than using `/nix/var/nix/{profiles,gcroots}/per-user/`, put the user
profiles and gcroots under `$XDG_DATA_DIR/nix/{profiles,gcroots}`.

This means that the daemon no longer needs to manage these paths itself
(they are fully handled client-side). In particular, it doesn’t have to
`chown` them anymore (removing one need for root).

This does change the layout of the gc-roots created by nix-env, and is
likely to break some stuff, so I’m not sure how to properly handle that.
2023-01-17 14:17:28 +01:00
John Ericson
f419ab48e6 Try to fix build failure
Failure: https://hydra.nixos.org/build/205357257/nixlog/1

The problem seems to be trying to `std::visit` a derived class of
`std::variant`. Per
https://stackoverflow.com/questions/63616709/incomplete-type-stdvariant-used-in-nested-name-specifier
certain C++ standard library implementations allow this, but others do
not.

The solution is simply to call the `raw` method, which upcasts the
reference back to the `std::variant`.
2023-01-15 15:16:14 -05:00
John Ericson
a416476217 Move ValidPathInfo defintions to path-info.cc
Originally there was no `path-info.*`, then there was `path-info.hh`,
then there was `path-info.cc`, but only for new things. Moving this
stuff over makes everything consistent.
2023-01-13 15:39:19 -05:00
Robert Hensing
fec527bba1
Merge pull request #7597 from tweag/move-implem-bit-to-implem-file
Move the `getBuildLog` implementation to its own implementation file
2023-01-13 20:16:33 +01:00
Robert Hensing
d21f54958e
Merge pull request #6815 from obsidiansystems/better-wanted-outputs
`OutputSpec` for `DerivationGoal` and `DerivedPath`, today's `OutputSpec` -> `ExtendedOutputSpec`
2023-01-13 16:03:12 +01:00
Théophane Hufschmitt
b8a0e9a9b8 Move the getBuildLog implementation to its own implementation file
Keep the header minimal and clean
2023-01-13 11:05:44 +01:00
Théophane Hufschmitt
bdeb6de889
Merge pull request #7430 from tweag/ca/fix-nix-log
Ca/fix nix log
2023-01-13 11:00:56 +01:00
John Ericson
d8512653d4 Write more (extended) output spec tests 2023-01-12 22:05:55 -05:00
John Ericson
d29eb08563 Assert on construction that OutputsSpec::Names is non-empty 2023-01-12 20:52:29 -05:00
John Ericson
e947aa5401 Unit test OuputsSpec::{union_, isSubsetOf} 2023-01-12 20:33:50 -05:00
John Ericson
31875bcfb7 Split OutputsSpec::merge into OuputsSpec::{union_, isSubsetOf}
Additionally get rid of the evil time we made an empty
`OutputSpec::Names()`.
2023-01-12 20:20:27 -05:00
Valentin Gagarin
48b2a3a0d0 remove unncessary cast 2023-01-12 13:23:32 +01:00
John Ericson
0faf5326bd Improve tests for OutputsSpec 2023-01-11 19:09:21 -05:00
John Ericson
5ba6e5d0d9 Remove default constructor from OutputsSpec
This forces us to be explicit.

It also requires to rework how `from_json` works. A `JSON_IMPL` is added
to assist with this.
2023-01-11 19:08:19 -05:00
John Ericson
114a6e2b09 Make it hard to construct an empty OutputsSpec::Names
This should be a non-empty set, and so we don't want people doing this
by accident. We remove the zero-0 constructor with a little inheritance
trickery.
2023-01-11 19:08:19 -05:00
John Ericson
ce2f91d356 Split OutputsSpec and ExtendedOutputsSpec, use the former more
`DerivedPath::Built` and `DerivationGoal` were previously using a
regular set with the convention that the empty set means all outputs.
But it is easy to forget about this rule when processing those sets.
Using `OutputSpec` forces us to get it right.
2023-01-11 18:57:18 -05:00
John Ericson
a7c0cff07f Rename OutputPath -> ExtendedOutputPath
Do this prior to making a new more limitted `OutputPath` we will use in
more places.
2023-01-11 18:55:29 -05:00
John Ericson
a8f45b5e5a Improve OutputsSpec slightly
A few little changes preparing for the rest.
2023-01-11 18:54:50 -05:00
Théophane Hufschmitt
a3ba80357d
Merge pull request #7543 from obsidiansystems/typed-string-context
Parse string context elements properly
2023-01-11 07:09:37 +01:00
Robert Hensing
34a1e0d29b doc/manual: Introduce @docroot@ as a stable base for includable snippets
This way the links are clearly within the manual (ie not absolute paths),
while allowing snippets to reference the documentation root reliably,
regardless of at which base url they're included.
2023-01-10 22:30:41 +01:00
John Ericson
da64f026dd Make clear that StorePathWithOutputs is a deprecated type
- Add a comment

- Put `OutputsSpec` in a different header (First part of #6815)

- Make a few stray uses of it in new code use `DerivedPath` instead.
2023-01-10 11:27:19 -05:00
Théophane Hufschmitt
8d88c3b347
Merge pull request #7307 from hercules-ci/derivation-goal-improve-comment
libstore/derivation-goal: Elaborate a TODO for performance concern
2023-01-06 13:07:57 +01:00
Eelco Dolstra
420ccecc1e
Merge pull request #7557 from NixOS/fix-7529
On macOS with auto-uid-allocation and sandboxing, use the correct gid
2023-01-06 12:35:55 +01:00
Eelco Dolstra
3a98107170
Merge pull request #7542 from edolstra/gc-deadlock
Fix deadlock between auto-GC and addTempRoot()
2023-01-05 17:08:23 +01:00
Eelco Dolstra
0fe2b222d5
Merge pull request #7539 from tweag/fix-nix-why-depends--derivation
Fix `nix why-depends --derivation`
2023-01-05 15:32:04 +01:00
Eelco Dolstra
4e84b532ed On macOS with auto-uid-allocation and sandboxing, use the correct gid
macOS doesn't have user namespacing, so the gid of the builder needs
to be nixbld. The logic got "has sandboxing enabled" confused with
"has user namespaces".

Fixes #7529.
2023-01-05 04:58:55 -08:00
Eelco Dolstra
6991e558dd Move macOS sandbox files to sr/libstore/build 2023-01-04 04:50:45 -08:00
Eelco Dolstra
609a7dc059 Include macOS sandbox files in the Nix binary
This basically reverts 6e5165b773.
It fixes errors like

  sandbox-exec: <internal init prelude>:292:47: unable to open sandbox-minimal.sb: not found

when trying to run a development Nix installed in a user's home
directory.

Also, we're trying to minimize the number of installed files
to make it possible to deploy Nix as a single statically-linked
binary.
2023-01-04 04:36:07 -08:00
Naïm Favier
3c968191f1
move unsafeDiscardReferences out of outputChecks
It's not a check.
2023-01-03 18:53:01 +01:00
Naïm Favier
15f7fa59be
unsafeDiscardReferences
Adds a new boolean structured attribute
`outputChecks.<output>.unsafeDiscardReferences` which disables scanning
an output for runtime references.

    __structuredAttrs = true;
    outputChecks.out.unsafeDiscardReferences = true;

This is useful when creating filesystem images containing their own embedded Nix
store: they are self-contained blobs of data with no runtime dependencies.

Setting this attribute requires the experimental feature
`discard-references` to be enabled.
2023-01-03 17:19:16 +01:00
Eelco Dolstra
28d5b5cd45 Fix deadlock between auto-GC and addTempRoot()
Previously addTempRoot() acquired the LocalStore state lock and waited
for the garbage collector to reply. If the garbage collector is in the
same process (as it the case with auto-GC), this would deadlock as
soon as the garbage collector thread needs the LocalStore state lock.

So now addTempRoot() uses separate Syncs for the state that it
needs. As long at the auto-GC thread doesn't call addTempRoot() (which
it shouldn't), it shouldn't deadlock.

Fixes #3224.
2023-01-03 15:20:21 +01:00
Eelco Dolstra
224b56f10e Move creation of the temp roots file into its own function
This also moves the file handle into its own Sync object so we're not
holding the _state while acquiring the file lock. There was no real
deadlock risk here since locking a newly created file cannot block,
but it's still a bit nicer.
2023-01-03 14:51:23 +01:00
Eelco Dolstra
ae31b5f50f
Merge pull request #7497 from rski/master
src/libstore: Print the reason opening the DB failed
2023-01-03 12:44:14 +01:00
Théophane Hufschmitt
8cac451fce Fix why-depends for CA derivations (again)
This has the same goal as b13fd4c58e81b2b2b0d72caa5ce80de861622610,but
achieves it in a different way in order to not break
`nix why-depends --derivation`.
2023-01-02 17:42:22 +01:00
Théophane Hufschmitt
fb8fc6fda6
Merge pull request #7478 from hercules-ci/make-sure-initNix-called
libstore: Make sure that initNix has been called
2023-01-02 14:12:49 +01:00
Théophane Hufschmitt
e8a3e58171
Merge pull request #7521 from ncfavier/migration-deadlock
Release shared lock before acquiring exclusive lock
2023-01-02 11:08:43 +01:00
Steven Shaw
84b0893725
Fix error message 2023-01-01 12:37:43 +10:00
Eelco Dolstra
8c52f8ea9d
Merge pull request #7524 from ncfavier/sandbox-paths-closure
doc: sandbox-paths computes closures
2022-12-29 19:45:51 +01:00
Naïm Favier
d5d2f50ebb
doc: sandbox-paths computes closures 2022-12-28 17:09:20 +01:00
Naïm Favier
81c3f99b36
Release shared lock before acquiring exclusive lock
In principle, this should avoid deadlocks where two instances of Nix are
holding a shared lock on big-lock and are both waiting to get an
exclusive lock.

However, it seems like `flock(2)` is supposed to do this automatically,
so it's not clear whether this is actually where the problem comes from.
2022-12-27 15:58:14 +01:00
Robert Hensing
aba6eb348e libstore: Make sure that initNix has been called
Prevent bugs like https://github.com/cachix/cachix/pull/477
2022-12-24 14:39:30 +01:00
Eelco Dolstra
c164d304f3 nix develop: Set personality
This makes 'nix develop' set the Linux personality in the same way
that the actual build does, allowing a command like 'nix develop
nix#devShells.i686-linux.default' on x86_64-linux to work correctly.
2022-12-23 16:33:55 +01:00
rski
d034ed1891 src/libstore: Print the reason opening the DB failed
Without this, the error is lost, and it makes for a hard to debug
situation. Also remove some of the busyness inside the sqlite_open_v2
args.

The errcode returned is not the extended one. The only way to make open
return an extended code, would be to add SQLITE_OPEN_EXRESCODE to the
flags. In the future it might be worth making this change,
which would also simplify the existing SQLiteError code.
2022-12-23 02:55:51 +02:00
mupdt
bc8ab21c5a [PDT] TDE-3114: prevent a race-condition when creating the S3 cache 2022-12-21 04:50:40 -05:00
Robert Hensing
c965f35de7 Improve sqlite error messages
They did not include the detailed error message, losing essential
information for troubleshooting.

Example message:

    warning: creating statement 'insert or rplace into NARs(cache, hashPart, namePart, url, compression, fileHash, fileSize, narHash, narSize, refs, deriver, sigs, ca, timestamp, present) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 1)': at offset 10: SQL logic error, near "rplace": syntax error (in '/tmp/nix-shell.grQ6f7/nix-test/tests/binary-cache/test-home/.cache/nix/binary-cache-v6.sqlite')

It's not the best example; more important information will be in
the message for e.g. a constraint violation.

I don't see why this specific error is printed as a warning, but
that's for another commit.
2022-12-17 14:51:37 +01:00
Taeer Bar-Yam
e5eb05c599 getBuildLog: factor out resolving derivations 2022-12-15 15:58:54 -05:00
Eelco Dolstra
0687e16c4a Fix a crash in DerivedPath::Built::toJSON() with impure derivations
The use of 'nullptr' here didn't result in a null JSON value, but in a
nullptr being cast to a string, which aborts.
2022-12-15 16:02:27 +01:00
Naïm Favier
1f3c0a3c1d
Allow disabling build users by unsetting build-users-group
Unsetting `build-users-group` (without `auto-allocate-uids` enabled)
gives the following error:

```
src/libstore/lock.cc:25: static std::unique_ptr<nix::UserLock> nix::SimpleUserLock::acquire(): Assertion `settings.buildUsersGroup != ""' failed.
```

Fix the logic in `useBuildUsers` and document the default value
for `build-users-group`.
2022-12-14 00:40:30 +01:00
John Ericson
5273cf4c97 Merge remote-tracking branch 'upstream/master' into indexed-store-path-outputs 2022-12-12 17:40:49 -05:00
John Ericson
dabb03b8d0 Merge remote-tracking branch 'upstream/master' into indexed-store-path-outputs 2022-12-12 17:36:02 -05:00
John Ericson
dc075dcdd0
Apply suggestions from code review
Co-authored-by: Eelco Dolstra <edolstra@gmail.com>
2022-12-12 16:26:10 -05:00
Eelco Dolstra
ae5f62a894 Move isUri() and resolveUri() out of filetransfer.cc
These are purely related to NIX_PATH / -I command line parsing, so put
them in libexpr.
2022-12-12 14:05:35 +01:00
Eelco Dolstra
7396844676
Merge pull request #7421 from edolstra/lazy-trees-trivial-changes
Trivial changes from the lazy-trees branch
2022-12-12 13:52:56 +01:00
John Ericson
1879c7c95e
Merge branch 'master' into indexed-store-path-outputs 2022-12-12 07:33:36 -05:00
Théophane Hufschmitt
2affb19c92
Merge pull request #7409 from tweag/fix-6383
check the store for input before failing (hopefully fix #6383)
2022-12-09 06:33:30 +01:00
Taeer Bar-Yam
3b27181ee5 fix missing function after rebase 2022-12-08 16:59:21 -05:00
regnat
04b113f6cb Fix nix log with CA derivations
Fix #6209

When trying to run `nix log <installable>`, try first to resolve the derivation pointed to
by `<installable>` as it is the resolved one that holds the build log.

This has a couple of shortcomings:
1. It’s expensive as it requires re-reading the derivation
2. It’s brittle because if the derivation doesn’t exist anymore or can’t
   be resolved (which is the case if any one of its build inputs is missing),
   then we can’t access the log anymore

However, I don’t think we can do better (at least not right now).
The alternatives I see are:
1. Copy the build log for the un-resolved derivation. But that means a
   lot of duplication
2. Store the results of the resolving in the db. Which might be the best
   long-term solution, but leads to a whole new class of potential
   issues.
2022-12-08 16:03:20 -05:00
Eelco Dolstra
703d863a48 Trivial changes from the lazy-trees branch 2022-12-07 14:06:34 +01:00
Linus Heckemann
8e0946e8df Remove repeat and enforce-determinism options
These only functioned if a very narrow combination of conditions held:

- The result path does not yet exist (--check did not result in
  repeated builds), AND
- The result path is not available from any configured substituters, AND
- No remote builders that can build the path are available.

If any of these do not hold, a derivation would be built 0 or 1 times
regardless of the repeat option. Thus, remove it to avoid confusion.
2022-12-07 11:36:48 +01:00
Taeer Bar-Yam
1c8de7d3d0 improve style 2022-12-06 11:25:38 -05:00
Eelco Dolstra
54906bc93c
Merge pull request #7382 from fricklerhandwerk/doc-automatic-uid
move documentation on `auto-allocate-uids` to options docs
2022-12-06 11:31:34 +01:00
Eelco Dolstra
484578d3f9
Tweak option descriptions 2022-12-06 10:30:36 +01:00
Taeer Bar-Yam
8c7661da09 check the store for input before failing (hopefully fix #6383) 2022-12-05 23:22:38 -05:00
Taeer Bar-Yam
e4f9f3bf24 check the store for input before failing (hopefully fix #6700) 2022-12-05 11:27:47 -05:00
Eelco Dolstra
1e6a5d1ff6 Clean up cgroup handling in getMaxCPU()
Also, don't assume in LocalDerivationGoal that cgroups are mounted on
/sys/fs/cgroup.
2022-12-02 12:59:13 +01:00
Eelco Dolstra
1211e59a03 Move cgroup.{cc,hh} to libutil 2022-12-02 12:38:03 +01:00