Commit graph

6666 commits

Author SHA1 Message Date
regnat 838f862f4f doc: Wrap at 80 characters 2021-06-02 11:26:04 +02:00
Théophane Hufschmitt 7565308d04
Fix a documentation typo
Co-authored-by: Eelco Dolstra <edolstra@gmail.com>
2021-06-02 11:25:47 +02:00
regnat 7d651f5c3f throw_ -> reportError
This function might or might not throw depending on the value of
`keepGoing`, so naming it `throw_` was a bit confusing
2021-06-02 11:24:31 +02:00
regnat d12b12a15b Let nix flake check keep going when keep-going is set
When the `keep-going` option is set to `true`, make `nix flake check`
continue as much as it can before failing.

The UI isn’t perfect as-it-is as all the lines currently start with a
mostly useless `error (ignored): error:` prefix, but I’m not sure what
the best output would be, so I’ll leave it as-it-is for the time being

(This is a bit hijacking the `keep-going` flag as it’s supposed to be a
build-time only thing. But I think it’s faire to reuse it here).

Fix https://github.com/NixOS/nix/issues/4450
2021-06-02 11:13:12 +02:00
regnat 5985b8b527 Check the CA hash when importing stuff in the local store
When adding a path to the local store (via `LocalStore::addToStore`),
ensure that the `ca` field of the provided `ValidPathInfo` does indeed
correspond to the content of the path.
Otherwise any untrusted user (or any binary cache) can add arbitrary
content-addressed paths to the store (as content-addressed paths don’t
need a signature).
2021-06-01 15:09:24 +02:00
Eelco Dolstra 48396d940e
Merge pull request #4866 from alyssais/libdl
Only link with libdl on Linux
2021-06-01 11:50:50 +02:00
Eelco Dolstra b8fbfc80fd
Merge pull request #4864 from jeremyschlatter/fix-typo
Fix typo in documentation
2021-06-01 11:49:46 +02:00
Eelco Dolstra caef6f4314
Merge pull request #4734 from p01arst0rm/fix-s3-ifdef
unified macro style for ENABLE_S3
2021-06-01 11:30:21 +02:00
Alyssa Ross c57ab17687
Only link with libdl on Linux
Linux is (as far as I know) the only mainstream operating system that
requires linking with libdl for dlopen.  On BSD, libdl doesn't exist,
so on non-FreeBSD BSDs linking will currently fail.  On macOS, it's
apparently just a symlink to libSystem (macOS libc), presumably
present for compatibility with things that assume Linux.

So the right thing to do here is to only add -ldl on Linux, not to add
it for everything that isn't FreeBSD.
2021-06-01 08:05:21 +00:00
Jeremy Schlatter f674f7f434
Fix typo in documentation 2021-06-01 00:05:34 -07:00
Timothy Klim 4da9ec772c Add .tar.zst support for TarballInputScheme 2021-05-29 16:03:26 +07:00
Eelco Dolstra b10256af51
Merge pull request #4849 from NixOS/ca/fix-nix-store--export
Make the Nar hash non modulo
2021-05-28 10:48:36 +02:00
regnat a22755721b Recursively substitute the realisations
Make sure that whenever we substitute a realisation, we also substitute
its entire closure
2021-05-26 18:44:17 +02:00
regnat 1f3ff0d193 Aso track the output path of the realisation dependencies 2021-05-26 17:09:21 +02:00
regnat cb46d70794 Add a db migration script 2021-05-26 16:59:09 +02:00
regnat 63ebfc73c5 Make copyPaths copy the whole realisations closure
Otherwise registering the realisations on the remote side might fail as
it now expects a complete closure
2021-05-26 16:59:09 +02:00
regnat 8c30acc3e8 Properly track the drvoutput references when building 2021-05-26 16:59:09 +02:00
regnat af3afd25ea Add a method to compute the closure of a realisation
Only considers the closure in term of `Realisation`, ignores all the
opaque inputs.

Dunno whether that’s the nicest solution, need to think it through a bit
2021-05-26 16:59:09 +02:00
regnat eca6ff06d6 Store the realisation deps on the local store 2021-05-26 16:59:09 +02:00
regnat 7ce0441d80 Add a dependencies field to DrvOutputInfo
Currently never used, nor set but will be useful shortly
2021-05-26 16:59:09 +02:00
regnat 7616268812 Always send the realisations as JSON
Align all the worker protocol with `buildDerivation` which inlines the
realisations as one opaque json blob.
That way we don’t have to bother changing the remote store protocol
when the definition of `Realisation` changes, as long as we keep the
json backwards-compatible
2021-05-26 16:59:09 +02:00
regnat 129384bcf3 Remove the remaining occurenceses of a NarHash modulo 2021-05-26 09:39:29 +02:00
regnat 79ae9e4558 Make the Nar hash non modulo
It makes much more sense to have the Nar hash be a plain straight hash
rather than a hash modulo
2021-05-25 10:58:43 +02:00
Michael Adler 9e9a8456d7 fix doc: nix profile info -> nix profile list
Signed-off-by: Michael Adler <therisen06@gmail.com>
2021-05-24 12:36:08 +02:00
regnat a8416866cf Always send the realisations as JSON
Align all the worker protocol with `buildDerivation` which inlines the
realisations as one opaque json blob.
That way we don’t have to bother changing the remote store protocol
when the definition of `Realisation` changes, as long as we keep the
json backwards-compatible
2021-05-19 11:45:16 +02:00
regnat 184558834a Extract a generic computeClosure function
Move the `closure` logic of `computeFSClosure` to its own (templated) function.

This doesn’t bring much by itself (except for the ability to properly
test the “closure” functionality independently from the rest), but it
allows reusing it (in particular for the realisations which will require
a very similar closure computation)
2021-05-19 11:44:58 +02:00
Eelco Dolstra 7234cf39be
Merge pull request #4831 from matthewbauer/fix-extra-slash-in-canon-path
Fix extra slash in canonPath output
2021-05-19 11:10:43 +02:00
Matthew Bauer 3d90ab9345 Fix extra slash in canonPath output
When you have a symlink like:

  /tmp -> ./private/tmp

you need to resolve ./private/tmp relative to /tmp’s dir: ‘/’. Unlike
any other path output by dirOf, / ends with a slash. We don’t want
trailing slashes here since we will append another slash in the next
comoponent, so clear s like we would if it was a symlink to an absoute
path.

This should fix at least part of the issue in
https://github.com/NixOS/nix/issues/4822, will need confirmation that
it actually fixes the problem to close though.

Introduced in f3f228700a.
2021-05-18 16:38:55 -05:00
regnat 59d0de6ea1 Restore an accidentally suppressed negation
Accidentally removed in ca96f52194. This
caused `nix run` to systematically fail with

```
error: app program '/nix/store/…' is not in the Nix store
```
2021-05-18 13:54:05 +02:00
Eelco Dolstra de77d1b924
Merge pull request #4827 from matthewbauer/run-bashrc-first-in-nix-develop
Source bashrc first in nix develop
2021-05-18 11:31:52 +02:00
Matthew Bauer 5fd8cf7667 Source bashrc first in nix develop
~/.bashrc should be sourced first in the rc script so that PATH &
other env vars give precedence over the bashrc PATH.

Also, in my bashrc I alias rm as:

  alias rm='rm -Iv'

To avoid running this alias (which shows ‘removed '/tmp/nix-shell.*'),
we can just prefix rm with command.
2021-05-17 15:07:00 -05:00
regnat ca96f52194 Split the parsing of an App and its resolving
That way things (like `nix flake check`) can evaluate the `app` outputs
without having to build anything
2021-05-17 17:50:41 +02:00
Eelco Dolstra bd6cf25952
Merge pull request #4819 from NixOS/ca/fix-nix-run
Resolve the program path in `nix run`
2021-05-17 16:28:14 +02:00
Eelco Dolstra 6849ae82de
Merge pull request #4818 from NixOS/ca/cli-use-builtpaths
Enforce the use of properly built paths in libcmd
2021-05-17 16:15:40 +02:00
regnat f0c0052d4b Resolve the program path in nix run
Fix #4768
2021-05-17 09:48:51 +02:00
regnat 2105084645 Enfore the use of properly built paths in libcmd
Replace `DerivedPathWithHints` by a new `BuiltPath` type that serves as
a proof that the corresponding path has been built.
2021-05-17 08:45:08 +02:00
Emily 559a504da7 sandbox: allow SystemVersionCompat.plist on Darwin
For whatever reason, many programs trying to access SystemVersion.plist
also open SystemVersionCompat.plist; this includes Python code and
coreutils’ `cat(1)` (but not the native macOS `/bin/cat`). Illustratory
`dtruss(1m)` output:

    open("/System/Library/CoreServices/SystemVersion.plist\0", 0x0, 0x0)		 = 3 0
    open("/System/Library/CoreServices/SystemVersionCompat.plist\0", 0x0, 0x0)		 = 4 0

I assume this is a Big Sur change relating to the 10.16.x/11.x
version compatibility divide and that it’s something along the lines of
a hook inside libSystem.

Fixes a lot of sandboxed package builds under Big Sur.
2021-05-17 01:24:31 +01:00
Eelco Dolstra 340f831ebe
Merge pull request #4798 from matthewbauer/relock-wait-for-build-slot-goals
Relock wait for build slot goals
2021-05-13 13:07:35 +02:00
Eelco Dolstra 89a4ede92b
Merge pull request #4801 from matthewbauer/fix-tokenize-output-names
Fix tokenize output names in DerivedPath
2021-05-13 13:06:29 +02:00
Matthew Bauer 8c7e043de2 Fix tokenize output names in drv
This should fix the issue described in
https://discourse.nixos.org/t/derivation-does-not-have-wanted-outputs-dev-out/12905.

Specifically, we get an error of

  error: derivation '/nix/store/_.drv' does not have wanted outputs 'dev,out'

when a path like /nix/store/_.drv!dev,out is sent to the daemon.
2021-05-12 21:40:28 -05:00
Matthew Bauer 9a14335845 Relock wait for build slot goals
When we don’t have enough free job slots to run a goal, we put it in
the waitForBuildSlot list & unlock its output locks. This will
continue from where we left off (tryLocalBuild). However, we need the
locks to get reacquired when/if the goal ever restarts. So, we need to
send it back through tryToBuild to get reqacquire those locks.

I think this bug was introduced in
https://github.com/NixOS/nix/pull/4570. It leads to some builds
starting without proper locks.
2021-05-12 12:15:32 -05:00
regnat ec613603ba DerivedPathWithHints -> BuiltPath
Just a renaming for now
2021-05-12 16:19:51 +02:00
Lorenzo Manacorda 4029f4b05b doc: mention Priority for substituters 2021-05-12 13:27:05 +02:00
Eelco Dolstra 7f9759b18d
Merge pull request #4781 from NixOS/locally_cache_the_remote_realisations
Add a realisations disk cache
2021-05-10 20:37:57 +02:00
Eelco Dolstra 8768398d5f
Merge pull request #4787 from Ma27/builtins-ceil-floor
Implement `builtins.floor` and `builtins.ceil` using the C library functions internally
2021-05-10 20:37:27 +02:00
regnat d5d19582ef Simplify the realisations disk cache 2021-05-10 17:47:14 +02:00
regnat ab96c1ee50 Remove useless parents
I never remember the exact syntax of the `switch` statement
2021-05-10 17:36:49 +02:00
Maximilian Bosch bec33858bb
primops: math.h -> cmath
Co-authored-by: Eelco Dolstra <edolstra@gmail.com>
2021-05-10 16:41:10 +02:00
Eelco Dolstra b68a85df0a
Merge pull request #4776 from NixOS/fix-ca-normalization
Properly normalize the content-addressed paths
2021-05-10 16:11:38 +02:00
Maximilian Bosch 7f7f99f350
Implement builtins.floor and builtins.ceil using the C library functions internally
Closes #4782

Note: even though the type is internally called `NixFloat`, it's
actually a `double`.
2021-05-10 12:19:32 +02:00
Eelco Dolstra 2bb49fb6d0
Merge pull request #4786 from matthewbauer/mkdir-local-share-nix
Create parent for trusted list path before writing
2021-05-10 11:14:45 +02:00
Matthew Bauer 2f63cc02de Create parent trusted list path before writing
This makes sure that $HOME/.local/share/nix exists before we try to
write to it.
2021-05-08 21:31:28 -05:00
regnat b66234134f Add a realisations disk cache
Similar to the nar-info disk cache (and using the same db).
This makes rebuilds muuch faster.

- This works regardless of the ca-derivations experimental feature.
  I could modify the logic to not touch the db if the flag isn’t there,
  but given that this is a trash-able local cache, it doesn’t seem to be
  really worth it.
- We could unify the `NARs` and `Realisation` tables to only have one
  generic kv table. This is left as an exercise to the reader.
- I didn’t update the cache db version number as the new schema just
  adds a new table to the previous one, so the db will be transparently
  migrated and is backwards-compatible.

Fix #4746
2021-05-06 17:38:20 +02:00
Matthew Bauer 1e3a9033b7 Use derivation output name from toDerivation
This was previously done in https://github.com/NixOS/nix/pull/4515 but
got clobbered away in https://github.com/NixOS/nix/pull/4594.

--------------------------------------------------------------------------------

This fixes an issue where derivations with a primary output that is
not "out" would fail with:

$ nix profile install nixpkgs#sqlite
error: opening directory '/nix/store/2a2ydlgyydly5czcc8lg12n6qqkfz863-sqlite-3.34.1-bin': No such file or directory

This happens because while derivations produce every output when
built, you might not have them if you didn't build the derivation
yourself (for instance, the store path was fetch from a binary cache).
This uses outputName provided from DerivationInfo which appears to
match the first output of the derivation.
2021-05-05 16:33:05 -05:00
regnat bf485dcf46 Properly normalize the content-addressed paths
Make sure that their timestamp are always normalized.
Otherwise, strange − and non-deterministic − things might happen, like
https://github.com/NixOS/nixpkgs/issues/121813

Fix #4775
2021-05-05 21:00:08 +02:00
regnat dadfbce318 Fix the double-slash in the realisations path
Make sure that we always access the realisations under
`binaryCacheUrl/realisations` and not `binaryCacheUrl//realisations`

Fix #4766
2021-05-04 10:35:34 +02:00
Eelco Dolstra ef13c9c223
Merge pull request #4750 from NinjaTrappeur/nin-build-dry-run-json
nix build: make dry-run to print a json output if --json is enabled
2021-05-03 16:14:29 +02:00
Eelco Dolstra 40378fbcba
Merge pull request #4761 from emilazy/issue-4658-mark-impure-host-deps-as-optional
Mark `__impureHostDeps` paths as optional
2021-05-03 16:13:36 +02:00
Maximilian Bosch e5951a6b2f
Bump version number for DerivedPath changes
I guess I misunderstood John's initial explanation about why wildcards
for outputs are sent to older stores[1]. My `nix-daemon` from 2021-03-26
also has version 1.29, but misses the wildcard[2]. So bumping seems to
be the right call.

[1] https://github.com/NixOS/nix/pull/4759#issuecomment-830812464
[2] 255d145ba7
2021-05-03 01:12:23 +02:00
Emily c4355a52fa Mark __impureHostDeps paths as optional
Starting in macOS 11, the on-disk dylib bundles are no longer available,
but nixpkgs needs to be able to keep compatibility with older versions
that require `/usr/lib/libSystem.B.dylib` in `__impureHostDeps`. Allow
it to keep backwards compatibility with these versions by marking these
dependencies as optional.

Fixes #4658.
2021-05-02 05:30:50 +01:00
Domen Kožar e3e78ee2a2
Merge pull request #4751 from Ma27/storepath-pos
primops/storePath: add trace to pure mode error
2021-04-27 19:05:23 +02:00
Maximilian Bosch e6a360a4d9
primops/storePath: add trace to pure mode error
As described in #4745 it's otherwise fairly hard to understand where
this is coming from. Say you have an expression which uses e.g.
`types.package`:

``` nix
{ outputs = { self, nixpkgs }: {
    packages.x86_64-linux.hello = let
      foo = nixpkgs.lib.evalModules {
        modules = [
          {
            options.foo.bar = with nixpkgs.lib; mkOption { type = types.package; };
          }
          {
            foo.bar = ./.;
          }
        ];
      };
    in builtins.trace foo.config.foo.bar.outPath nixpkgs.legacyPackages.x86_64-linux.hello;
    defaultPackage.x86_64-linux = self.packages.x86_64-linux.hello;
  };
}
```

Then you'll get an error trace like this:

```
error: 'builtins.storePath' is not allowed in pure evaluation mode

       at /nix/store/p4h2x6r80njkb0j2rc1xjhhl99yri3zb-source/lib/attrsets.nix:328:15:

          327|     let
          328|       path' = builtins.storePath path;
             |               ^
          329|       res =

       … while evaluating the attribute 'config.foo.bar.outPath'

       at /nix/store/p4h2x6r80njkb0j2rc1xjhhl99yri3zb-source/lib/attrsets.nix:332:11:

          331|           name = sanitizeDerivationName (builtins.substring 33 (-1) (baseNameOf path'));
          332|           outPath = path';
             |           ^
          333|           outputs = [ "out" ];

       … while evaluating the attribute 'packages.x86_64-linux.hello'

       at /nix/store/6c1rfsqzrhjw1235palzjmf5vihcpci7-source/flake.nix:3:5:

            2| { outputs = { self, nixpkgs }: {
            3|     packages.x86_64-linux.hello = let
             |     ^
            4|       foo = nixpkgs.lib.evalModules {
```

Fixes #4745
2021-04-27 17:24:38 +02:00
Félix Baylac-Jacqué 7dca9c24c4
nix build: make dry-run to print a json output if --json is enabled 2021-04-27 11:28:47 +02:00
Eelco Dolstra fe2bf464cf Merge branch 'remove-trailing-spaces' of github.com:NixOS/nix 2021-04-23 15:09:44 +02:00
regnat 31313d1401 Replace the trailing markdown spaces by a backslash
They are equivalent according to
<https://spec.commonmark.org/0.29/#hard-line-breaks>,
and the trailing spaces tend to be a pain (because the make git
complain, editors tend to want to remove them − the `.editorconfig`
actually specifies that − etc..).
2021-04-23 14:37:21 +02:00
Eelco Dolstra 4549d65b4f
Merge pull request #4732 from NixOS/4725-always-register-the-realisations
Aways register the realisations
2021-04-23 14:22:03 +02:00
Eelco Dolstra 293220bed5
Merge pull request #4440 from Ma27/misc-pos-fixes
Miscellaneous improvements for positioning in eval-errors
2021-04-23 11:10:59 +02:00
regnat d3df747cb6 Revert "Make nix shell fallback to static outputs when needed"
This reverts commit 8d66f5f110.

This fix isn't needed anymore now that the realisations are always
properly registered
2021-04-23 09:34:43 +02:00
p01arst0rm 45473d02c9 unified macro style for ENABLE_S3 2021-04-23 07:30:05 +01:00
regnat 9161e02039 Always register the realisations of input-addressed drvs
Fix #4725
2021-04-22 20:07:02 +02:00
Eelco Dolstra d9864be4b7 Merge branch 'master' of github.com:NixOS/nix 2021-04-22 10:33:00 +02:00
Eelco Dolstra 78a2303b3d Merge branch 'nix-derivation-query-store-path' of https://github.com/matthewbauer/nix 2021-04-22 10:29:18 +02:00
Eelco Dolstra dd83b29b90
Merge pull request #4724 from NixOS/nix-shell-missing-outputs
Make `nix shell` fallback to static outputs when needed
2021-04-22 10:25:55 +02:00
Eelco Dolstra 5385755227 Remove makeDecompressionSource()
This function doesn't support all compression methods (i.e. 'none' and
'br') so it shouldn't be exposed.

Also restore the original decompress() as a wrapper around
makeDecompressionSink().
2021-04-22 10:23:20 +02:00
Eelco Dolstra a6eebcff36 Merge branch 's3-decompress' of https://github.com/lukegb/nix 2021-04-22 10:20:40 +02:00
Luke Granger-Brown 97dde3cdd9 libutil: allow decompression with none/empty method
The S3 store relies on the ability to be able to decompress things with
an empty method, because it just passes the value of the Content-Encoding
directly to decompress.

If the file is not compressed, then this will cause the compression
routine to get confused.

This caused NixOS/nixpkgs#120120.
2021-04-22 02:33:59 +00:00
Antoine Martin ac38c4cdc2 Fix typo in flake doc 2021-04-22 03:07:57 +02:00
Matthew Bauer 428062e578 Get deriver when passing --derivation
This makes Nix look up paths derivations when they are passed as a
store paths. So:

$ nix path-info --derivation /nix/store/0pisd259nldh8yfjvw663mspm60cn5v8-hello-2.10

now gives

/nix/store/qp724w90516n4bk5r9gfb37vzmqdh3z7-hello-2.10.drv

instead of "".

If no deriver is available, Nix now errors instead of silently
ignoring that argument.
2021-04-21 15:32:33 -05:00
regnat 8d66f5f110 Make nix shell fallback to static outputs when needed
In case of pure input-addressed derivations, the build loop doesn't
guaranty that the realisations are stored in the db (if the output paths
are already there or can be substituted, the realisations won't be
registered). This caused `nix shell` to fail in some cases because it
was assuming that the realisations were always existing.

A better (but more involved) fix would probably to ensure that we always
register the realisations, but in the meantime this patches the surface
issue.

Fix #4721
2021-04-21 17:46:27 +02:00
Eelco Dolstra 8d651a1f68 Fix brotli compression of files > 128 KiB
This has been broken since faa31f4084.
2021-04-20 22:54:49 +02:00
Eelco Dolstra b60b0d62d6
Merge pull request #4720 from alyssais/wait
Include sys/wait.h everywhere WIFEXITED etc is used
2021-04-20 16:09:30 +02:00
Alyssa Ross 9ac6534f7c
Include sys/wait.h everywhere WIFEXITED etc is used
This is required on NetBSD, and I think FreeBSD too.
2021-04-19 18:31:58 +00:00
Maximilian Bosch 6905291daf
libcmd/installables: force re-evaluation of cached failures
I think that it's not very helpful to get "cached failures" in a wrong
`flake.nix`. This can be very confusing when debugging a Nix expression.
See for instance NixOS/nixpkgs#118115.

In fact, the eval cache allows a forced reevaluation which is used for
e.g. `nix eval`.

This change makes sure that this is the case for `nix build` as well. So
rather than

    λ ma27 [~/Projects/exp] → ../nix/outputs/out/bin/nix build -L --rebuild --experimental-features 'nix-command flakes'
    error: cached failure of attribute 'defaultPackage.x86_64-linux'

the evaluation of already-evaluated (and failed) attributes looks like
this now:

    λ ma27 [~/Projects/exp] → ../nix/outputs/out/bin/nix build -L --rebuild --experimental-features 'nix-command flakes'
    error: attribute 'hell' missing

           at /nix/store/mrnvi9ss8zn5wj6gpn4bcd68vbh42mfh-source/flake.nix:6:35:

                5|
                6|     packages.x86_64-linux.hello = nixpkgs.legacyPackages.x86_64-linux.hell;
                 |                                   ^
                7|
    (use '--show-trace' to show detailed location information)
2021-04-19 19:51:04 +02:00
Eelco Dolstra 3ee0ecdda0
Merge pull request #4679 from ony/feature/one-pass-canon-path
Optimize canonPath to resolve relative symlinks in one pass
2021-04-15 14:11:51 +02:00
Eelco Dolstra 15f4d4fd43 Drop libbz2 / zlib / lzma dependency + style fixes 2021-04-15 13:55:22 +02:00
Eelco Dolstra 6fb7582413 Merge branch 'libarchive-decompress' of https://github.com/serokell/nix 2021-04-15 13:39:04 +02:00
Eelco Dolstra f716779c1f Merge branch 'revertRemoveJSON' of https://github.com/cgohla/nix 2021-04-15 13:26:56 +02:00
Eelco Dolstra 709a60a045
Merge pull request #4707 from grahamc/defaul-path-restricted-eval
EvalSettings::getDefaultNixPath: respect {restrict,pure}Eval
2021-04-14 11:02:58 +02:00
Eelco Dolstra b47b5f4061
Merge pull request #4708 from NixOS/fix-remote-registerDrvOutput
Fix registerDrvOutput with the daemon
2021-04-14 11:01:36 +02:00
Maximilian Bosch 864ef0e93d
libexpr/primops: review 2021-04-13 23:12:39 +02:00
Maximilian Bosch ad7b47dc85
primops/libexpr: use new attr-call extractor everywhere; use function's pos if attr-set pos == noPos 2021-04-13 23:12:38 +02:00
Maximilian Bosch f60473a077
libexpr/primops: Move attr name extraction into its own function
This now takes care of providing positioning for both the faulting value
and the faulting function call in case of an error.
2021-04-13 23:12:38 +02:00
Maximilian Bosch 7c76964daa
libexpr: misc improvements for proper error position
When working on some more complex Nix code, there are sometimes rather
unhelpful or misleading error messages, especially if coerce-errors are
thrown.

This patch is a first steps towards improving that. I'm happy to file
more changes after that, but I'd like to gather some feedback first.

To summarize, this patch does the following things:

* Attrsets (a.k.a. `Bindings` in `libexpr`) now have a `Pos`. This is
  helpful e.g. to identify which attribute-set in `listToAttrs` is
  invalid.

* The `Value`-struct has a new method named `determinePos` which tries
  to guess the position of a value and falls back to a default if that's
  not possible.

  This can be used to provide better messages if a coercion fails.

* The new `determinePos`-API is used by `builtins.concatMap` now. With
  that change, Nix shows the exact position in the error where a wrong
  value was returned by the lambda.

  To make sure it's still obvious that `concatMap` is the problem,
  another stack-frame was added.

* The changes described above can be added to every other `primop`, but
  first I'd like to get some feedback about the overall approach.
2021-04-13 23:12:38 +02:00
Maximilian Bosch 3550a32b25
primops/derivation: use position of currently evaluated attribute
* The position of the `name`-attribute appears in the trace.
* If e.g. `meta` has no `outPath`-attribute, a `cannot coerce set to
  string` error will be thrown where `pos` points to `name =` which is
  highly misleading.
2021-04-13 23:12:38 +02:00
regnat ed29610cc6 Fix registerDrvOutput with the daemon
Resolve a protocol issue that caused the daemon to endlessly wait for
some information that the client doesn't ever send
2021-04-13 13:58:22 +02:00
Graham Christensen d04969ffa5 EvalSettings::getDefaultNixPath: respect {restrict,pure}Eval
Otherwise Nix may look to invalid locations for channels.
2021-04-12 12:37:15 -04:00
Domen Kožar c2dfda007e
add tests for zstd compression 2021-04-09 23:13:08 +02:00
Eelco Dolstra 42f0246698
Revert "libfetchers/tarball: Lock on effectiveUrl"
This reverts commit fc6bfb261d.

Fixes #4672.
2021-04-09 13:51:57 +02:00
Eelco Dolstra 906adadacd Restore stack size in child processes
Fixes #4673.
2021-04-07 13:40:13 +02:00
Eelco Dolstra 9b9e703df4 restoreSignals() + restoreAffinity() -> restoreProcessContext() 2021-04-07 13:10:02 +02:00
Eelco Dolstra 8a29052cb2 PathSubstitutionGoal: Clean up pipe
If there were many top-level goals (which are not destroyed until the
very end), commands like

  $ nix copy --to 'ssh://localhost?remote-store=/tmp/nix' \
    /run/current-system --no-check-sigs --substitute-on-destination

could fail with "Too many open files". So now we do some explicit
cleanup from amDone(). It would be cleaner to separate goals from
their temporary internal state, but that would be a bigger refactor.
2021-04-07 12:21:31 +02:00
Björn Gohla 9f28dd97ae Revert "Use upstream nlohmann_json"
This reverts commit 4145cd2da0.
2021-04-05 21:24:55 +01:00
John Ericson 125a824228 Document the derived path types. 2021-04-05 10:56:48 -04:00
John Ericson d8fa7517fa buildable.{cc,hh} -> derived-path.{cc,hh} 2021-04-05 10:33:28 -04:00
John Ericson 179582872d Make DerivedPathWithHints a newtype
This allows us to namespace its constructors under it.
2021-04-05 10:05:21 -04:00
John Ericson 9b805d36ac Rename Buildable 2021-04-05 09:52:25 -04:00
John Ericson 9dfb97c987 "newtype" BuildableReq
This makes for better types errors and allows us to give it methods.
2021-04-05 09:35:55 -04:00
John Ericson 4fe41c6db3 No templates for Buildable and BuildableReq 2021-04-05 09:15:25 -04:00
John Ericson 255d145ba7 Use BuildableReq for buildPaths and ensurePath
This avoids an ambiguity where the `StorePathWithOutputs { drvPath, {}
}` could mean "build `brvPath`" or "substitute `drvPath`" depending on
context.

It also brings the internals closer in line to the new CLI, by
generalizing the `Buildable` type is used there and makes that
distinction already.

In doing so, relegate `StorePathWithOutputs` to being a type just for
backwards compatibility (CLI and RPC).
2021-04-05 08:33:00 -04:00
John Ericson 32f4454b9f Move StorePathWithOutput utilities out of store class
These are by no means part of the notion of a store, but rather are
things that happen to use stores. (Or put another way, there's no way
we'd make them virtual methods any time soon.) It's better to move them
out of that too-big class then.

Also, this helps us remove StorePathWithOutputs from the Store interface
altogether next commit.
2021-04-05 08:31:37 -04:00
John Ericson 7a2b566dc8 Move StorePathWithOutputs into its own header/file
In the following commits it will become less prevalent.
2021-04-05 08:31:37 -04:00
John Ericson f7d9f7c338 Pull out Buildable into its own file/header in libnixstore 2021-04-05 08:31:37 -04:00
Mykola Orliuk f3f228700a canonPath in one pass 2021-03-31 04:58:49 +02:00
Bjørn Forsman edd606ae62 fetchGit: don't prefix "refs/heads/" on ref = "HEAD"
This fixes builtins.fetchGit { url = ...; ref = "HEAD"; }, that works in
stable nix (v2.3.10), but is broken in nix master:

  $ ./result/bin/nix repl
  Welcome to Nix version 2.4pre19700101_dd77f71. Type :? for help.

  nix-repl> builtins.fetchGit { url = "https://github.com/NixOS/nix"; ref = "HEAD"; }
  fetching Git repository 'https://github.com/NixOS/nix'fatal: couldn't find remote ref refs/heads/HEAD
  error: program 'git' failed with exit code 128

The documentation for builtins.fetchGit says ref = "HEAD" is the
default, so it should also be supported to explicitly pass it.

I came across this issue because poetry2nix can use ref = "HEAD" in some
situations.

Fixes #4674.
2021-03-30 11:21:38 +02:00
Eelco Dolstra dd77f71afe LocalBinaryCacheStore::upsertFile(): Fix race
When multiple threads try to upsert the same file, this could fail.

Fixes #4667.
2021-03-26 17:10:15 +01:00
Eelco Dolstra 4638bcfb2c Fix some typos
Fixes #4671.
2021-03-26 16:14:38 +01:00
Eelco Dolstra d1cb956bf2
Merge pull request #4650 from samueldr/fix/registry-config-dir
Use the appropriate config dir for the registry
2021-03-24 13:37:19 +01:00
Eelco Dolstra 1581c3e8ef
Merge pull request #4603 from DavHau/davhau-improve-nix-conf-help-builders
improve man page for nix.conf (builders)
2021-03-23 16:13:02 +01:00
Eelco Dolstra 6749d9e057
Merge pull request #4646 from Ma27/support-scoped-v6
Fix Nix to properly work with stores using a scoped IPv6 address
2021-03-23 15:03:47 +01:00
DavHau 0f40561c78 nix.conf builders: refer to manual page 2021-03-23 10:19:00 +07:00
John Ericson f44206e719 Fix typos in the last PR #4656 2021-03-22 15:18:48 +00:00
John Ericson 9d309de0de Clean up serialization for BuildResult
A few versioning mistakes were corrected:

- In 27b5747ca7, Daemon protocol had some
  version `>= 0xc` that should have been `>= 0x1c`, or `28` since the
  other conditions used decimal.

- In a2b69660a9, legacy SSH gated new CAS
  info on version 6, but version 5 in the server. It is now 6
  everywhere.

Additionally, legacy ssh was sending over more metadata than the daemon
one was. The daemon now sends that data too.

CC @regnat

Co-authored-by: Cole Helbling <cole.e.helbling@outlook.com>
2021-03-22 14:57:41 +00:00
Samuel Dionne-Riel 66b857244f Use the appropriate config dir for the registry 2021-03-19 15:20:47 -04:00
Eelco Dolstra 3e0e443181 ProgressBar: Respect verbosity level
This makes its behaviour consistent with SimpleLogger.
2021-03-19 17:56:39 +01:00
Eelco Dolstra ef83ced4e1 Restore 'nix flake info' as a deprecated alias 2021-03-19 17:21:37 +01:00
Eelco Dolstra 8a5203d3b8
Merge pull request #4648 from hercules-ci/remove-unimplemented-hashAlgoOpt
Remove unimplemented hashAlgoOpt
2021-03-17 20:51:09 +01:00
Robert Hensing a61112aadf Remove unimplemented hashAlgoOpt
It was in the header but never implemented.
2021-03-17 11:27:11 +01:00
Maximilian Bosch ddcef3bcbb
Fix Nix to properly work with stores using a scoped IPv6 address
According to RFC4007[1], IPv6 addresses can have a so-called zone_id
separated from the actual address with `%` as delimiter. In contrast to
Nix 2.3, the version on `master` doesn't recognize it as such:

    $ nix ping-store --store ssh://root@fe80::1%18 --experimental-features nix-command
    warning: 'ping-store' is a deprecated alias for 'store ping'
    error: --- Error ----------------------------------------------------------------- nix
    don't know how to open Nix store 'ssh://root@fe80::1%18'

I modified the IPv6 match-regex accordingly to optionally detect this
part of the address. As we don't seem to do anything special with it, I
decided to leave it as part of the URL for now.

Fixes #4490

[1] https://tools.ietf.org/html/rfc4007
2021-03-16 19:14:42 +01:00
Eelco Dolstra 66fa1c7375 Merge 'nix flake {info,list-inputs}' into 'nix flake metadata'
Fixes #4613.
2021-03-16 17:19:04 +01:00
Eelco Dolstra 77f5d171e1 --override-input: Imply --no-write-lock-file
Fixes #3779.
2021-03-16 16:53:39 +01:00
Eelco Dolstra ccb8a403ee
Merge pull request #4587 from obsidiansystems/derivation-goal-detect-invalid-output
Throw error for derivation goal with bogus wanted output
2021-03-15 16:49:44 +01:00
Eelco Dolstra c0073f6268
Merge pull request #4580 from obsidiansystems/restore-test-build-remote-ca-fixed
Restore now-working build-remote-content-addressed-fixed test
2021-03-15 16:48:28 +01:00
Eelco Dolstra 91ea9c52ee
Merge pull request #4624 from NixOS/ca/realisation-nix-command
Add a `nix realisation` command for working on realisations
2021-03-15 16:37:09 +01:00
regnat 703c98c6cb Properly sign the unresolved drvs
Don't let them inherit the signature from the parent one (because it
makes no sense to do so), but re-sign them after they have been built
2021-03-15 16:35:17 +01:00
regnat 54ced9072b Check the signatures when copying store paths around
Broken atm
2021-03-15 16:35:14 +01:00
regnat 3e6017f911 pathInfoIsTrusted -> pathInfoIsUntrusted
I guess the rationale behind the old name wath that
`pathInfoIsTrusted(info)` returns `true` iff we would need to `blindly`
trust the path (because it has no valid signature and `requireSigs` is
set), but I find it to be a really confusing footgun because it's quite
natural to give it the opposite meaning.
2021-03-15 16:34:49 +01:00
regnat 826877cabf Add some logic for signing realisations
Not exposed anywhere, but built realisations are now signed (and this
should be forwarded when copy-ing them around)
2021-03-15 16:34:49 +01:00
Eelco Dolstra 306c154632
Merge pull request #4592 from NixOS/ca/remote-cache
Substitute content-addressed derivations
2021-03-15 16:22:42 +01:00
Eelco Dolstra 3bb1becdbb
Merge pull request #4566 from orbekk/master
Add support for bare git repositories when using git+file
2021-03-11 10:38:07 +01:00
Yorick 8a0c00b856
Use libarchive for all compression 2021-03-10 22:34:29 +01:00
regnat 89013bdd7e Add a nix realisation command for working on realisations
Currently only has `nix realisation info`, more to come probably
2021-03-09 10:16:44 +01:00
Eelco Dolstra 1c0e3e453d
Merge pull request #4601 from lovesegfault/fix-4598
nix-build: check that envCommand exists
2021-03-08 10:13:39 +01:00
Eelco Dolstra c5a232dda7
Merge pull request #4615 from NixOS/nix-show-stats-with-nix-cmd
Make NIX_SHOW_STATS work with new-style commands
2021-03-08 09:56:59 +01:00
Bernardo Meurer 6e849e3b0a
nix-build: set execfail
When starting a nix-shell with `-i` it was previously possible for it to
silently fail in the scenario where the specified interpreter didn't
exist. This happened due to the `exec` call masking the issue.

With this change we enable `execfail`, which causes the script using
`nix-shell` as interpreter to correctly exit with code 127.

Fixes: #4598
2021-03-04 18:54:45 -08:00
John Ericson 6212e89bf6 Avoid some StorePath -> Path -> StorePath roundtrips
There were done when StorePath was defined in Rust and there were some
FFI issues. This is no longer an issue.
2021-03-05 00:49:46 +00:00
DavHau e16431b466 improve man page for nix.conf (builders) 2021-03-04 16:14:23 +07:00
Eelco Dolstra 665d4ec2da nix repl :doc: Don't return docs for partially applied primops
This gives misleading results for Nixpkgs functions like lib.toUpper.

Fixes #4596.
2021-03-03 17:52:57 +01:00
regnat 7331da99ab Make NIX_SHOW_STATS work with new-style commands 2021-03-02 14:59:12 +01:00
dramforever fc6bfb261d libfetchers/tarball: Lock on effectiveUrl
Basically, if a tarball URL is used as a flake input, and the URL leads
to a redirect, the final redirect destination would be recorded as the
locked URL.

This allows tarballs under https://nixos.org/channels to be used as
flake inputs. If we, as before, lock on to the original URL it would
break every time the channel updates.
2021-03-02 21:56:50 +08:00
John Ericson 7ce10924c7 Fix bad wanted output error as requested
- UsageError -> Error

- include drv path too
2021-03-01 15:07:09 +00:00
Kjetil Orbekk 9931f18c2d Add support for bare git repositories with git+file
Local git repositories are normally used directly instead of
cloning. This commit checks if a repo is bare and forces a
clone.

Co-authored-by: Théophane Hufschmitt <regnat@users.noreply.github.com>
2021-03-01 09:03:25 -05:00
regnat df9d4f88d5 Allow substituting drv outputs when building 2021-03-01 14:00:17 +01:00
regnat 5d1c05b075 SubstitutionGoal -> PathSubstitutionGoal
To prepare for the upcoming DrvOutputSubstitutionGoal
2021-03-01 14:00:17 +01:00
Eelco Dolstra e64cf8e0a3
Merge pull request #4574 from grahamc/libstore-ssh-host-key
libstore: support passing a builder's public SSH host key
2021-03-01 13:12:18 +01:00
John Ericson 4bbd80c536 Throw error for derivation goal with bogus wanted output 2021-02-28 00:19:35 +00:00
John Ericson ae1441e548 Fix testing fixed-output derivations in double sandboxes
What happened was that Nix was trying to unconditionally mount these
paths in fixed-output derivations, but since the outer derivation was
pure, those paths did not exist. The solution is to only mount those
paths when they exist.
2021-02-27 05:23:14 +00:00
Puck Meerburg 7241fdc3d2 Properly propagate libseccomp linker flags 2021-02-26 23:01:16 +00:00
John Ericson 553b79f8c9 Remove unused redirectedBadOutputs 2021-02-26 16:10:54 +00:00
John Ericson d560311f76 Remove temporary #if 0...#endif from previous commit 2021-02-26 16:10:52 +00:00
John Ericson 68f4c728ec Split {,local-}derivation-goal.{cc,hh}
This separates the scheduling logic (including simple hook pathway) from
the local-store needing code.

This should be the final split for now. I'm reasonably happy with how
it's turning out, even before I'm done moving code into
`local-derivation-goal`. Benefits:

1. This will help "witness" that the hook case is indeed a lot simpler,
   and also compensate for the increased complexity that comes from
   content-addressed derivation outputs.

2. It also moves us ever so slightly towards a world where we could use
   off-the-shelf storage or sandboxing, since `local-derivation-goal`
   would be gutted in those cases, but `derivation-goal` should remain
   nearly the same.

The new `#if 0` in the new files will be deleted in the following
commit. I keep it here so if it turns out more stuff can be moved over,
it's easy to do so in a way that preserves ordering --- and thus
prevents conflicts.

N.B.
```sh
git diff HEAD^^ --color-moved --find-copies-harder --patience --stat
```
makes nicer output.
2021-02-26 16:10:26 +00:00
John Ericson 05cc5a8587 Copy {,local-}derivation-goal.{cc,h}
Doing this prior to splitting, so we get better diff with default
options (e.g. on GitHub).
2021-02-26 16:01:47 +00:00
Eelco Dolstra 94637cd7e5
Merge pull request #4477 from NixOS/ca/build-remote
Build ca derivations remotely
2021-02-26 16:54:44 +01:00
regnat f54976d77b Simplify the case where the drv is a purely input-addressed one 2021-02-26 16:35:05 +01:00
Eelco Dolstra 076d2b04da
Update src/libstore/build/derivation-goal.cc 2021-02-26 16:30:12 +01:00
Eelco Dolstra 17c98e03ea
Update src/build-remote/build-remote.cc 2021-02-26 16:29:37 +01:00
Eelco Dolstra 14f51880ba
Update src/build-remote/build-remote.cc 2021-02-26 16:29:30 +01:00
Eelco Dolstra 453c3a603f nix flake update: Recreate the lock file
This is probably what most people expect it to do. Fixes #3781.

There is a new command 'nix flake lock' that has the old behaviour of
'nix flake update', i.e. it just adds missing lock file entries unless
overriden using --update-input.
2021-02-26 14:55:54 +01:00
Eelco Dolstra 20ea1de77d Use std::make_unique 2021-02-26 12:35:29 +01:00
Eelco Dolstra 73daffb81b Merge remote-tracking branch 'origin/deduplicate-static-hashes-computation' 2021-02-26 12:30:25 +01:00
Eelco Dolstra d2803406b5
Merge pull request #4487 from NixOS/ca/copy-drv-outputs
Copy ca derivation outputs
2021-02-26 12:20:42 +01:00
Eelco Dolstra 5edab777d1
Merge pull request #4530 from alyssais/kill
libutil: EPERM from kill(-1, ...) is fine
2021-02-26 12:19:16 +01:00
regnat c43f446f4e Make nix copy work without the ca-derivations flag
The experimental feature was by mistake required for `nix copy` to work
at oll
2021-02-25 17:21:51 +01:00
Théophane Hufschmitt c182aac98a Apply @edolstra stylistic suggestions
Mostly removing useless comments and adding spaces before `&`

Co-authored-by: Eelco Dolstra <edolstra@gmail.com>
2021-02-25 17:21:51 +01:00
regnat 3b76f8f252 Ensure that the ca-derivations bit is set when copying realisations
This should already hold, but better ensure it for future-proof-nees
2021-02-25 17:19:59 +01:00
regnat f67ff1f575 Don't crash when copying realisations to a non-ca remote
Rather throw a proper exception, and catch&log it on the client side
2021-02-25 17:19:59 +01:00
regnat 2e199673a5 Use RealisedPaths in copyPaths
That way we can copy the realisations too (in addition to the store
paths themselves)
2021-02-25 17:18:48 +01:00
Graham Christensen 1130b28824
distributed builds: load remote builder host key from the machines file
This is already used by Hydra, and is very useful when materializing
a remote builder list from service discovery. This allows the service
discovery tool to only sync one file instead of two.
2021-02-25 09:17:34 -05:00
Shea Levy f6c5b05488
Respect command registrations in plugins. 2021-02-24 08:25:45 -05:00
Shea Levy 98d1b64400
Initialize plugins after handling initial command line flags
This is technically a breaking change, since attempting to set plugin
files after the first non-flag argument will now throw an error. This
is acceptable given the relative lack of stability in a plugin
interface and the need to tie the knot somewhere once plugins can
actually define new subcommands.
2021-02-24 08:22:17 -05:00
Shea Levy ec3497c1d6
Bail if plugin-files is set after plugins have been loaded.
We know the flag will be ignored but the user wants it to take effect.
2021-02-24 08:20:48 -05:00
Eelco Dolstra a878c448d8
Merge pull request #4551 from danieldk/system-features-compute-level
Add x86_64 compute levels as system features
2021-02-23 14:30:10 +01:00
regnat ba1a256d08 Make DerivationGoal::drv a full Derivation
This field used to be a `BasicDerivation`, but this `BasicDerivation`
was downcasted to a `Derivation` when needed (implicitely or not), so we
might as well make it a full `Derivation` and upcast it when needed.

This also allows getting rid of a weird duplication in the way we
compute the static output hashes for the derivation. We had to
do it differently and in a different place depending on whether the
derivation was a full derivation or just a basic drv, but we can now do
it unconditionally on the full derivation.

Fix #4559
2021-02-23 14:15:45 +01:00
regnat 527da73690 Properly bypass the registering step when all outputs are present
There was already some logic for that, but it didn't handle the case of
content-addressed outputs, so extend it a bit for that
2021-02-23 08:04:03 +01:00
regnat 69666b951e build-remote: Always register the missing outputs
It's possible that all the paths are already there, but just not
associated to the current drv output
2021-02-23 08:04:03 +01:00
regnat 8c385d16ee Also send ca outputs to the build hook
Otherwise they don't get registered, triggering an assertion failure
at some point later
2021-02-23 08:04:03 +01:00
regnat 27b5747ca7 RemoteStore: Send back the new realisations
To allow it to build ca derivations remotely
2021-02-23 08:04:03 +01:00
regnat a2b69660a9 LegacySSHStore: Send back the new realisations
To allow it to build ca derivations remotely
2021-02-23 08:04:03 +01:00
regnat 5687564a27 LocalStore: Send back the new realisations
To allow it to build ca derivations remotely
2021-02-23 08:04:03 +01:00
regnat 6fbf3fe636 Make the build-hook work with ca derivations
- Pass it the name of the outputs rather than their output paths (as
  these don't exist for ca derivations)
- Get the built output paths from the remote builder
- Register the new received realisations
2021-02-23 08:04:03 +01:00
Shea Levy 35205e2e92
Warn about instability of plugin API 2021-02-22 17:10:55 -05:00
regnat e2f3b2eb42 Make missing auto-call arguments throw an eval error
The PR #4240 changed messag of the error that was thrown when an auto-called
function was missing an argument.
However this change also changed the type of the error, from `EvalError`
to a new `MissingArgumentError`. This broke hydra which was relying on
an `EvalError` being thrown.

Make `MissingArgumentError` a subclass of `EvalError` to un-break hydra.
2021-02-22 16:13:09 +01:00
Eelco Dolstra 574eb2be81
Tweak error message 2021-02-22 15:24:14 +01:00
Daniël de Kok 2de232d2b3 Add x86_64 compute levels as additional system types
When performing distributed builds of machine learning packages, it
would be nice if builders without the required SIMD instructions can
be excluded as build nodes.

Since x86_64 has accumulated a large number of different instruction
set extensions, listing all possible extensions would be unwieldy.
AMD, Intel, Red Hat, and SUSE have recently defined four different
microarchitecture levels that are now part of the x86-64 psABI
supplement and will be used in glibc 2.33:

https://gitlab.com/x86-psABIs/x86-64-ABI
https://lwn.net/Articles/844831/

This change uses libcpuid to detect CPU features and then uses them to
add the supported x86_64 levels to the additional system types. For
example on a Ryzen 3700X:

$ ~/aps/bin/nix -vv --version | grep "Additional system"
Additional system types: i686-linux, x86_64-v1-linux, x86_64-v2-linux, x86_64-v3-linux
2021-02-22 09:11:15 +01:00
Eelco Dolstra 548437c234
Merge pull request #4541 from obsidiansystems/simpler-store-path-command
Deeper `Command` hierarchy to remove redundancy
2021-02-19 16:18:53 +01:00
regnat f483b623e9 Remove the drv resolution caching mechanism
It isn't needed anymore now that don't need to eagerly resolve
everything like we used to do. So we can safely get rid of it
2021-02-19 15:48:31 +01:00
regnat 4bc28c44f2 Store the output hashes in the initialOutputs of the drv goal
That way we
1. Don't have to recompute them several times
2. Can compute them in a place where we know the type of the parent
  derivation, meaning that we don't need the casting dance we had before
2021-02-19 15:48:31 +01:00
Théophane Hufschmitt 0bfbd04369 Don't expose the "bang" drvoutput syntax
It's not fixed nor useful atm, so better keep it hidden

Co-authored-by: Eelco Dolstra <edolstra@gmail.com>
2021-02-19 15:48:31 +01:00
Théophane Hufschmitt 93d9eb78a0 Syntactic fixes
Co-authored-by: Eelco Dolstra <edolstra@gmail.com>
2021-02-19 15:48:31 +01:00
regnat 87c8d3d702 Register the realisations for unresolved drvs
Once a build is done, get back to the original derivation, and register
all the newly built outputs for this derivation.

This allows Nix to work properly with derivations that don't have all
their build inputs available − thus allowing garbage collection and
(once it's implemented) binary substitution
2021-02-19 15:48:31 +01:00
regnat 263f6dbd1c Don't crash nix-build when not all outputs are realised
Change the `nix-build` logic for linking/printing the output paths to allow for
some outputs to be missing. This might happen when the toplevel
derivation didn't have to be built, either because all the required
outputs were already there, or because they have all been substituted.
2021-02-19 15:48:31 +01:00