Commit graph

1354 commits

Author SHA1 Message Date
Eelco Dolstra
fcddaa4b9b dump(): Use emplace() 2022-01-07 13:23:17 +01:00
Eelco Dolstra
e1a0359b59 isInDir() / isDirOrInDir(): Use std::string_view 2022-01-07 13:23:00 +01:00
pennae
26a8b220eb avoid ostream sentries per json string character
we don't have to create an ostream sentry object for every character of a JSON
string we write. format a bunch of characters and flush them to the stream all
at once instead.

this doesn't affect small numbers of string characters, but larger numbers of
total JSON string characters written gain a lot. at 1MB of total string written
we gain almost 30%, at 16MB it's almost a factor of 3x. large numbers of JSON
string characters do occur naturally in a nixos system evaluation to generate
documentation (though this is now somewhat mitigated by caching the largest part
of nixos option docs).

benchmarked with

  hyperfine 'nix eval --raw --expr "let s = __concatStringsSep \"\" (__genList (_: \"c\") 256); in __toJSON (__genList (_: s) {e})"' --warmup 1 -L e 1,4,256,4096,65536

before:

  Benchmark 1: nix eval --raw --expr "let s = __concatStringsSep \"\" (__genList (_: \"c\") 256); in __toJSON (__genList (_: s) 1)"
    Time (mean ± σ):      12.5 ms ±   0.2 ms    [User: 9.2 ms, System: 4.0 ms]
    Range (min … max):    11.9 ms …  13.1 ms    223 runs

  Benchmark 2: nix eval --raw --expr "let s = __concatStringsSep \"\" (__genList (_: \"c\") 256); in __toJSON (__genList (_: s) 4)"
    Time (mean ± σ):      12.5 ms ±   0.2 ms    [User: 9.3 ms, System: 3.8 ms]
    Range (min … max):    11.9 ms …  13.2 ms    220 runs

  Benchmark 3: nix eval --raw --expr "let s = __concatStringsSep \"\" (__genList (_: \"c\") 256); in __toJSON (__genList (_: s) 256)"
    Time (mean ± σ):      13.2 ms ±   0.3 ms    [User: 9.8 ms, System: 4.0 ms]
    Range (min … max):    12.6 ms …  14.3 ms    205 runs

  Benchmark 4: nix eval --raw --expr "let s = __concatStringsSep \"\" (__genList (_: \"c\") 256); in __toJSON (__genList (_: s) 4096)"
    Time (mean ± σ):      24.0 ms ±   0.4 ms    [User: 19.4 ms, System: 5.2 ms]
    Range (min … max):    22.7 ms …  25.8 ms    119 runs

  Benchmark 5: nix eval --raw --expr "let s = __concatStringsSep \"\" (__genList (_: \"c\") 256); in __toJSON (__genList (_: s) 65536)"
    Time (mean ± σ):     196.0 ms ±   3.7 ms    [User: 171.2 ms, System: 25.8 ms]
    Range (min … max):   190.6 ms … 201.5 ms    14 runs

after:

  Benchmark 1: nix eval --raw --expr "let s = __concatStringsSep \"\" (__genList (_: \"c\") 256); in __toJSON (__genList (_: s) 1)"
    Time (mean ± σ):      12.4 ms ±   0.3 ms    [User: 9.1 ms, System: 4.0 ms]
    Range (min … max):    11.7 ms …  13.3 ms    204 runs

  Benchmark 2: nix eval --raw --expr "let s = __concatStringsSep \"\" (__genList (_: \"c\") 256); in __toJSON (__genList (_: s) 4)"
    Time (mean ± σ):      12.4 ms ±   0.2 ms    [User: 9.2 ms, System: 3.9 ms]
    Range (min … max):    11.8 ms …  13.0 ms    214 runs

  Benchmark 3: nix eval --raw --expr "let s = __concatStringsSep \"\" (__genList (_: \"c\") 256); in __toJSON (__genList (_: s) 256)"
    Time (mean ± σ):      12.6 ms ±   0.2 ms    [User: 9.5 ms, System: 3.8 ms]
    Range (min … max):    12.1 ms …  13.3 ms    209 runs

  Benchmark 4: nix eval --raw --expr "let s = __concatStringsSep \"\" (__genList (_: \"c\") 256); in __toJSON (__genList (_: s) 4096)"
    Time (mean ± σ):      15.9 ms ±   0.2 ms    [User: 11.4 ms, System: 5.1 ms]
    Range (min … max):    15.2 ms …  16.4 ms    171 runs

  Benchmark 5: nix eval --raw --expr "let s = __concatStringsSep \"\" (__genList (_: \"c\") 256); in __toJSON (__genList (_: s) 65536)"
    Time (mean ± σ):      69.0 ms ±   0.9 ms    [User: 44.3 ms, System: 25.3 ms]
    Range (min … max):    67.2 ms …  70.9 ms    42 runs
2022-01-07 06:53:47 +01:00
Alexander Bantyev
581f774284
BaseError::calcWhat: take loggerSettings.showTrace into account
Text representation for errors should include the trace if
--show-trace is passed.
2021-12-28 15:53:21 +03:00
Eelco Dolstra
7feb741e00
Merge pull request #5821 from edolstra/remove-affinity
Remove CPU locking
2021-12-22 20:31:19 +01:00
Naïm Favier
1da1b2b345
Don't insert spaces when completing attribute paths 2021-12-22 16:17:01 +01:00
Eelco Dolstra
9747ea84b4 Remove CPU locking
This was already accidentally disabled in ba87b08. It also no longer
appears to be beneficial, and in fact slow things down, e.g. when
evaluating a NixOS system configuration:

  elapsed time:       median =      3.8170  mean =      3.8202  stddev =      0.0195  min =      3.7894  max =      3.8600  [rejected, p=0.00000, Δ=0.36929±0.02513]
2021-12-22 15:56:25 +01:00
Eelco Dolstra
ec8f24ed3a Ignore EPERM when unsharing FS state
On Docker (but not podman), unshare(CLONE_FS) fails with EPERM. So
let's ignore it and hope nothing bad happens.

Attempted fix for #5777.
2021-12-16 22:02:50 +01:00
Théophane Hufschmitt
6234e1c811
Merge pull request #5702 from baloo/baloo/hide-non-reproducible-settings
reproducibility: hide non-reproducible settings from manual
2021-12-14 09:14:25 +01:00
Yorick van Pelt
0e0de90b35
extract_archive: fix "Hard-link target '...'" error
Fixes #5741
2021-12-10 17:03:51 +01:00
Yorick van Pelt
be1055f2cc
extract_archive: use copy_pathname instead of set_pathname.
Libarchive documentation mentions that archive_entry_set_pathname
expects us to keep the passed string alive, which we don't.
2021-12-10 17:00:32 +01:00
Eelco Dolstra
bc57b3854e
Merge pull request #5695 from obsidiansystems/tidy-logging
Tidy up the logging
2021-12-09 15:31:08 +01:00
Sergei Trofimovich
c32a5f4d38 src/libutil/util.hh: fix build on gcc-11
Due to missing <atomic> declaration the build fails as:

    src/libutil/util.hh:350:24: error: no match for 'operator||' (operand types are 'std::atomic<bool>' and 'bool')
      350 |     if (_isInterrupted || (interruptCheck && interruptCheck()))
          |         ~~~~~~~~~~~~~~ ^~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          |         |                                 |
          |         std::atomic<bool>                 bool
2021-12-01 22:08:05 +00:00
Arthur Gautier
21520297da reproducibility: hide non-reproducible settings from manual
Because the manual is generated from default values which are themselves
generated from various sources (cpuid, bios settings (kvm), number of
cores). This commit hides non-reproducible settings from the manual
output.
2021-12-01 17:25:58 +01:00
John Ericson
1f15441103 Tidy up the logging
Use the macros more, so we properly skip work when the log level
excludes. Also log the daemon operation number on the daemon side.
2021-11-30 20:23:13 +00:00
Eelco Dolstra
6e0cbc666b createTempFile(): Mark file as CLOEEXEC
Fixes #5674.
2021-11-29 11:20:50 +01:00
Alex Shabalin
2970ca18bf Fix a minor data race with _isInterrupted 2021-11-24 14:50:08 +01:00
Jan Tojnar
e96faadcd6 Fix XDG_CONFIG_DIRS fallback
According to XDG Base Directory Specification,
it should fall back to /etc/xdg when the env var is not present.
2021-11-17 14:31:15 +01:00
Eelco Dolstra
8c93a481af Ignore errors unsharing/restoring the mount namespace
This prevents Nix from barfing when run in a container where it
doesn't have the appropriate privileges.
2021-11-16 14:48:44 +01:00
Eelco Dolstra
7a71621b7c Merge branch 'fix-writable-shell' of https://github.com/yorickvP/nix 2021-11-08 21:12:51 +01:00
Eelco Dolstra
6e30d9b69f Merge branch 'master' of https://github.com/alekswn/nix 2021-10-29 14:42:26 +02:00
Eelco Dolstra
a7d4f3411e Merge remote-tracking branch 'origin/master' into non-blocking-gc 2021-10-28 14:56:55 +02:00
Eelco Dolstra
13a7a24ba5 Style 2021-10-27 13:02:37 +02:00
Eelco Dolstra
0d9e050ba7 parseExperimentalFeature(): Initialize atomically 2021-10-26 14:29:48 +02:00
regnat
af99941279 Make experimental-features a proper type
Rather than having them plain strings scattered through the whole
codebase, create an enum containing all the known experimental features.

This means that
- Nix can now `warn` when an unkwown experimental feature is passed
  (making it much nicer to spot typos and spot deprecated features)
- It’s now easy to remove a feature altogether (once the feature isn’t
  experimental anymore or is dropped) by just removing the field for the
  enum and letting the compiler point us to all the now invalid usages
  of it.
2021-10-26 07:02:31 +02:00
Alexey Novikov
64a3b045c1 Fix error detection in 'base64Decode()'
Fixed a bug in initialization of 'base64DecodeChars' variable.
Currently decoder do not fail on invalid Base64 strings.
Added test-case to verify the fix.

Also have made 'base64DecodeChars' to be computed at compile time.
And added a test case to encode/decode string with non-printable charactes.
2021-10-17 12:45:26 +04:00
Yorick van Pelt
fcb8af550f
Restore parent mount namespace in restoreProcessContext
This ensures any started processes can't write to /nix/store (except
during builds). This partially reverts 01d07b1e, which happened because
of #2646.

The problem was only happening after nix downloads anything, causing
me to suspect the download thread. The problem turns out to be:
"A  process  can't  join a new mount namespace if it is sharing
filesystem-related attributes with another process", in this case this
process is the curl thread.

Ideally, we might kill it before spawning the shell process, but it's
inside a static variable in the getFileTransfer() function. So
instead, stop it from sharing FS state using unshare(). A strategy
such as the one from #5057 (single-threaded chroot helper binary) is
also very much on the table.

Fixes #4337.
2021-10-15 16:25:49 +02:00
Eelco Dolstra
eab934cb2a Make the canReachRoots() traversal non-recursive 2021-10-14 12:34:32 +02:00
kvtb
eae29b0385
fix build with gcc11 2021-10-13 18:03:33 +00:00
Eelco Dolstra
dced45f146 strcpy -> memcpy
Co-authored-by: Jörg Thalheim <Mic92@users.noreply.github.com>
2021-10-13 12:12:44 +02:00
Eelco Dolstra
262520fcfe Use a thread per connection 2021-10-13 12:12:44 +02:00
Eelco Dolstra
8614cf1334 Non-blocking garbage collector
The garbage collector no longer blocks other processes from
adding/building store paths or adding GC roots. To prevent the
collector from deleting store paths just added by another process,
processes need to connect to the garbage collector via a Unix domain
socket to register new temporary roots.
2021-10-13 12:12:44 +02:00
Eelco Dolstra
0fac86fd6f Style tweaks 2021-10-13 11:00:10 +02:00
Tom Bereknyei
03bb8f84e0 Add compression level for NARs
Based off on @dtzWill's #2276
2021-10-12 02:14:36 -04:00
Eelco Dolstra
c6718a9d95 Don't reset the logger in a vfork
9c766a40cb broke logging from the
daemon, because commonChildInit is called when starting the build hook
in a vfork, so it ends up resetting the parent's logger. So don't
vfork.

It might be best to get rid of vfork altogether, but that may cause
problems, e.g. when we call an external program like git from the
evaluator.
2021-10-06 13:54:59 +02:00
Eelco Dolstra
e4a5d64a81 Show failing PID 2021-10-05 13:19:55 +02:00
Eelco Dolstra
b299560872 Typo 2021-10-05 11:24:09 +02:00
Eelco Dolstra
43d4d75e22 Connect/bind Unix domain sockets in a child process
In the child process, we can do a chdir() and avoid the problem of the
path not fitting into sockaddr_un.
2021-10-05 10:44:59 +02:00
kvtb
638c73776a
fix creation of NAR files >4GB on 32-bit platforms
`size_t` is 32-bit on 32-bit platforms, while the file size can be bigger
2021-10-02 21:04:01 +00:00
Eelco Dolstra
9c766a40cb Fix 'error: reading a line: Input/output error' in startBuilder()
With -vvvv, the ProgressBar was polluting the stderr of the child,
messing up its \2 message to the parent.
2021-09-27 14:44:21 +02:00
Eelco Dolstra
d8c10028d9 Make setDefault() typed 2021-09-22 14:15:35 +02:00
Eelco Dolstra
817562e694 Add "nix profile rollback" command 2021-09-14 19:32:33 +02:00
Eelco Dolstra
a4ae601b44
Merge pull request #5245 from edolstra/warnings
Change warning messages from yellow to magenta
2021-09-14 11:46:34 +02:00
Eelco Dolstra
16d4922dd2
Merge pull request #5240 from edolstra/builtin-help
nix --help: Display help using lowdown instead of man
2021-09-14 11:31:23 +02:00
Eelco Dolstra
58b5036c54 Change warnings from yellow to magenta
This matches gcc and clang.
2021-09-14 10:42:29 +02:00
Eelco Dolstra
4ffda0af7c ANSI_YELLOW -> ANSI_WARNING 2021-09-14 10:42:29 +02:00
Eelco Dolstra
76e368a3b4 Fix macOS build 2021-09-14 10:07:31 +02:00
Eelco Dolstra
1ba993d07c Fix clang warning 2021-09-14 08:15:33 +02:00
Eelco Dolstra
4ed66735b6 RunOptions: Use designated initializers
Also get rid of _killStderr because it wasn't actually checked
anywhere.
2021-09-13 23:31:04 +02:00
Eelco Dolstra
49a932fb18 nix --help: Display help using lowdown instead of man
Fixes #4476.
Fixes #5231.
2021-09-13 14:45:21 +02:00
Naïm Favier
7f0d177ce7
Add missing include in util.cc 2021-09-08 12:20:08 +02:00
Eelco Dolstra
50a35860ee TarArchive: Small refactoring 2021-08-30 17:02:51 +02:00
Eelco Dolstra
c7a7652725 Don't segfault if archive_entry_pathname() returns null
Issues #4499.
2021-08-30 17:02:39 +02:00
Eelco Dolstra
eda0fee160
Merge pull request #5175 from Pamplemousse/make
Don't overwrite user provided `lib*_LDFLAGS`
2021-08-30 12:44:29 +02:00
Robert Hensing
f10465774f Force all Pos* to be non-null
This fixes a class of crashes and introduces ptr<T> to make the
code robust against this failure mode going forward.

Thanks regnat for the idea of a ref<T> without overhead!

Closes #4895
Closes #4893
Closes #5127
Closes #5113
2021-08-29 18:11:58 +02:00
Pamplemousse
a4c6d319a8 Don't overwrite user provided lib*_LDFLAGS
Signed-off-by: Pamplemousse <xav.maso@gmail.com>
2021-08-25 08:59:19 -07:00
Yaroslav Bolyukin
bbb3bcb165
Replace invalid characters in json logger
Fixes #5159

Signed-off-by: Yaroslav Bolyukin <iam@lach.pw>
2021-08-22 00:26:22 +03:00
Pamplemousse
0da416f820 15f4d4f follow up
* libstore: `bz2` should not be linked
  * libutil: `zlib.h` should not be included

Signed-off-by: Pamplemousse <xav.maso@gmail.com>
2021-08-10 16:04:53 -07:00
Andreas Rammhold
b9c9c25766
libutil: initialize the base64 decode array only once
Previously, despite having a boolean that tracked initialization, the
decode characters have been "calculated" every single time a base64
string was being decoded.

With this change we only initialize the decode array once in a
thread-safe manner.
2021-07-30 21:07:32 +02:00
Alyssa Ross
369ed71858
libutil: use uniform initialization in _deletePath
Otherwise I get a compiler error when building for NetBSD:

src/libutil/util.cc: In function 'void nix::_deletePath(const Path&, uint64_t&)':
src/libutil/util.cc:438:17: error: base operand of '->' is not a pointer
  438 |     AutoCloseFD dirfd(open(dir.c_str(), O_RDONLY));
      |                 ^~~~~
src/libutil/util.cc:439:10: error: 'dirfd' was not declared in this scope
  439 |     if (!dirfd) {
      |          ^~~~~
src/libutil/util.cc:444:17: error: 'dirfd' was not declared in this scope
  444 |     _deletePath(dirfd.get(), path, bytesFreed);
      |                 ^~~~~
2021-07-24 09:19:48 +00:00
Eelco Dolstra
140ccf1368 deletePath(): Return ENFILE instead of EBADF when out of file descriptors
Also remove an erroneous comment.
2021-07-20 20:59:45 +02:00
regnat
9b1f3cbc13 Forward the whole Nix config to the post-build-hook
Fill `NIX_CONFIG` with the value of the current Nix configuration before
calling the post-build-hook.
That way the whole configuration (including the possible
`experimental-features`, a possibly `--store` option or whatever) will
be made available to the hook
2021-07-15 18:41:56 +02:00
Eelco Dolstra
07790fdddf ref: Add equality operators 2021-07-09 14:03:48 +02:00
Domen Kožar
f9d72855ae
Merge pull request #4967 from Pamplemousse/specific_errors
Prefer to throw specific errors
2021-07-03 10:34:56 +02:00
Yestin L. Harrison
0fe84bef72 Add $NO_COLOR check to ANSI escape conditions 2021-07-02 09:33:54 -06:00
Yestin L. Harrison
20cce079f2 Respect TERM=dumb more consistently 2021-07-01 18:19:01 -06:00
Pamplemousse
4a7a8b87cd Prefer to throw specific errors
Signed-off-by: Pamplemousse <xav.maso@gmail.com>
2021-07-01 11:09:31 -07:00
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
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
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
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
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
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
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
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
Mykola Orliuk
f3f228700a canonPath in one pass 2021-03-31 04:58:49 +02:00
Eelco Dolstra
4638bcfb2c Fix some typos
Fixes #4671.
2021-03-26 16:14:38 +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
Yorick van Pelt
8a0c00b856
Use libarchive for all compression 2021-03-10 22:34:29 +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
5edab777d1
Merge pull request #4530 from alyssais/kill
libutil: EPERM from kill(-1, ...) is fine
2021-02-26 12:19:16 +01:00
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
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
37352aa7e1 Support --no-net for backwards compatibility 2021-02-07 20:44:56 +01:00
Alyssa Ross
7c112351d9
libutil: EPERM from kill(-1, ...) is fine
I tested a trivial program that called kill(-1, SIGKILL), which was
run as the only process for an unpriveleged user, on Linux and
FreeBSD.  On Linux, kill reported success, while on FreeBSD it failed
with EPERM.

POSIX says:

> If pid is -1, sig shall be sent to all processes (excluding an
> unspecified set of system processes) for which the process has
> permission to send that signal.

and

> The kill() function is successful if the process has permission to
> send sig to any of the processes specified by pid.  If kill() fails,
> no signal shall be sent.

and

> [EPERM]
>     The process does not have permission to send the signal to any
>     receiving process.

My reading of this is that kill(-1, ...) may fail with EPERM when
there are no other processes to kill (since the current process is
ignored).  Since kill(-1, ...) only attempts to kill processes the
user has permission to kill, it can't mean that we tried to do
something we didn't have permission to kill, so it should be fine to
interpret EPERM the same as success here for any POSIX-compliant
system.

This fixes an issue that Mic92 encountered[1] when he tried to review a
Nixpkgs PR on FreeBSD.

[1]: https://github.com/NixOS/nixpkgs/pull/81459#issuecomment-606073668
2021-02-07 13:56:50 +00:00
regnat
d2091af231 Move the GENERATE_CMP macro to its own file
Despite being an ugly hack, it can probably be useful in a couple extra
places
2021-02-05 11:42:33 +01:00
Eelco Dolstra
8e758d402b Remove mkFlag() 2021-01-27 12:06:03 +01:00
Eelco Dolstra
36c4d6f592 Group common options 2021-01-25 19:03:13 +01:00
Eelco Dolstra
807d963ee8 Group subcommands by category 2021-01-25 18:19:32 +01:00
Eelco Dolstra
b159d23800 Make '--help' do the same as 'help' (i.e. show a manpage) 2021-01-25 14:38:15 +01:00
Eelco Dolstra
488a826842
Merge pull request #4467 from edolstra/error-formatting
Improve error formatting
2021-01-25 12:50:57 +01:00
Eelco Dolstra
b7bfc7ee52
Add FIXME 2021-01-22 12:36:50 +01:00
Eelco Dolstra
55849e153e Change error position formatting
It's now

  at /home/eelco/Dev/nixpkgs/pkgs/applications/misc/hello/default.nix:7:7:

instead of

  at: (7:7) in file: /home/eelco/Dev/nixpkgs/pkgs/applications/misc/hello/default.nix

The new format is more standard and clickable.
2021-01-21 11:02:09 +01:00
Eelco Dolstra
40608342cb Remove trailing whitespace 2021-01-21 11:02:09 +01:00
Eelco Dolstra
8d4268d190 Improve error formatting
Changes:

* The divider lines are gone. These were in practice a bit confusing,
  in particular with --show-trace or --keep-going, since then there
  were multiple lines, suggesting a start/end which wasn't the case.

* Instead, multi-line error messages are now indented to align with
  the prefix (e.g. "error: ").

* The 'description' field is gone since we weren't really using it.

* 'hint' is renamed to 'msg' since it really wasn't a hint.

* The error is now printed *before* the location info.

* The 'name' field is no longer printed since most of the time it
  wasn't very useful since it was just the name of the exception (like
  EvalError). Ideally in the future this would be a unique, easily
  googleable error ID (like rustc).

* "trace:" is now just "…". This assumes error contexts start with
  something like "while doing X".

Example before:

  error: --- AssertionError ---------------------------------------------------------------------------------------- nix
  at: (7:7) in file: /home/eelco/Dev/nixpkgs/pkgs/applications/misc/hello/default.nix

       6|
       7|   x = assert false; 1;
        |       ^
       8|

  assertion 'false' failed
  ----------------------------------------------------- show-trace -----------------------------------------------------
  trace: while evaluating the attribute 'x' of the derivation 'hello-2.10'
  at: (192:11) in file: /home/eelco/Dev/nixpkgs/pkgs/stdenv/generic/make-derivation.nix

     191|         // (lib.optionalAttrs (!(attrs ? name) && attrs ? pname && attrs ? version)) {
     192|           name = "${attrs.pname}-${attrs.version}";
        |           ^
     193|         } // (lib.optionalAttrs (stdenv.hostPlatform != stdenv.buildPlatform && !dontAddHostSuffix && (attrs ? name || (attrs ? pname && attrs ? version)))) {

Example after:

  error: assertion 'false' failed

         at: (7:7) in file: /home/eelco/Dev/nixpkgs/pkgs/applications/misc/hello/default.nix

              6|
              7|   x = assert false; 1;
               |       ^
              8|

         … while evaluating the attribute 'x' of the derivation 'hello-2.10'

         at: (192:11) in file: /home/eelco/Dev/nixpkgs/pkgs/stdenv/generic/make-derivation.nix

            191|         // (lib.optionalAttrs (!(attrs ? name) && attrs ? pname && attrs ? version)) {
            192|           name = "${attrs.pname}-${attrs.version}";
               |           ^
            193|         } // (lib.optionalAttrs (stdenv.hostPlatform != stdenv.buildPlatform && !dontAddHostSuffix && (attrs ? name || (attrs ? pname && attrs ? version)))) {
2021-01-21 11:02:09 +01:00
Eelco Dolstra
1bbc66f865 Merge branch 'slashes-in-github-branches' of https://github.com/Ma27/nix 2021-01-18 12:55:06 +01:00
Domen Kožar
00f99fdfe6
Merge pull request #4240 from bburdette/2259-error-message
2259 error message - "auto-call" error
2021-01-15 18:26:21 +00:00
Eelco Dolstra
e21aee58f6 Fix tests 2021-01-08 14:17:06 +01:00
Eelco Dolstra
17beae299d Support binary unit prefixes in command line arguments 2021-01-08 12:51:19 +01:00
Eelco Dolstra
6548b89cc4 string2Int(): Return std::optional 2021-01-08 12:22:21 +01:00
Eelco Dolstra
29a445840a Remove unused mkFlag1 2021-01-08 11:42:44 +01:00
Eelco Dolstra
1d4954e73e Remove mkFlag integer specialisation 2021-01-08 11:40:36 +01:00
Eelco Dolstra
48a9be2aab Remove mkIntFlag 2021-01-08 10:44:55 +01:00
Eelco Dolstra
a93916b190
Merge pull request #4336 from NixOS/manpages
Documentation for nix subcommands
2020-12-23 21:10:32 +01:00
Eelco Dolstra
1047cb1e53
Command: Remove examples() 2020-12-23 18:26:40 +01:00
Eelco Dolstra
e27044216b Fix tests 2020-12-22 16:23:57 +01:00
Eelco Dolstra
724b7f4fb6 Don't log from inside the logger
This deadlocks ProgressBar, e.g.

  # nix run --impure --no-substitute --store '/tmp/nix2?store=/foo' --expr 'derivation { builder = /nix/store/zi90rxslsm4mlr46l2xws1rm94g7pk8p-busybox-1.31.1-x86_64-unknown-linux-musl/bin/busybox; }'

leads to

  Thread 1 (Thread 0x7ffff6126e80 (LWP 12250)):
  #0  0x00007ffff7215d62 in __lll_lock_wait () from /nix/store/9df65igwjmf2wbw0gbrrgair6piqjgmi-glibc-2.31/lib/libpthread.so.0
  #1  0x00007ffff720e721 in pthread_mutex_lock () from /nix/store/9df65igwjmf2wbw0gbrrgair6piqjgmi-glibc-2.31/lib/libpthread.so.0
  #2  0x00007ffff7ad17fa in __gthread_mutex_lock (__mutex=0x6c5448) at /nix/store/h31cy7jm6g7cfqbhc5pm4rf9c53i3qfb-gcc-9.3.0/include/c++/9.3.0/x86_64-unknown-linux-gnu/bits/gthr-default.h:749
  #3  std::mutex::lock (this=0x6c5448) at /nix/store/h31cy7jm6g7cfqbhc5pm4rf9c53i3qfb-gcc-9.3.0/include/c++/9.3.0/bits/std_mutex.h:100
  #4  std::unique_lock<std::mutex>::lock (this=0x7fffffff09a8, this=0x7fffffff09a8) at /nix/store/h31cy7jm6g7cfqbhc5pm4rf9c53i3qfb-gcc-9.3.0/include/c++/9.3.0/bits/unique_lock.h:141
  #5  std::unique_lock<std::mutex>::unique_lock (__m=..., this=0x7fffffff09a8) at /nix/store/h31cy7jm6g7cfqbhc5pm4rf9c53i3qfb-gcc-9.3.0/include/c++/9.3.0/bits/unique_lock.h:71
  #6  nix::Sync<nix::ProgressBar::State, std::mutex>::Lock::Lock (s=0x6c5448, this=0x7fffffff09a0) at src/libutil/sync.hh:45
  #7  nix::Sync<nix::ProgressBar::State, std::mutex>::lock (this=0x6c5448) at src/libutil/sync.hh:85
  #8  nix::ProgressBar::logEI (this=0x6c5440, ei=...) at src/libmain/progress-bar.cc:131
  #9  0x00007ffff7608cfd in nix::Logger::logEI (ei=..., lvl=nix::lvlError, this=0x6c5440) at src/libutil/logging.hh:88
  #10 nix::getCodeLines (errPos=...) at src/libutil/error.cc:66
  #11 0x00007ffff76073f2 in nix::showErrorInfo (out=..., einfo=..., showTrace=<optimized out>) at /nix/store/h31cy7jm6g7cfqbhc5pm4rf9c53i3qfb-gcc-9.3.0/include/c++/9.3.0/optional:897
  #12 0x00007ffff7ad19e7 in nix::ProgressBar::logEI (this=0x6c5440, ei=...) at src/libmain/progress-bar.cc:134
  #13 0x00007ffff7ab9d10 in nix::Logger::logEI (ei=..., lvl=nix::lvlError, this=0x6c5440) at src/libutil/logging.hh:88
  #14 nix::handleExceptions(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::function<void ()>) (programName="/home/eelco/Dev/nix/outputs/out/bin/nix", fun=...) at src/libmain/shared.cc:328
  #15 0x000000000046226b in main (argc=<optimized out>, argv=<optimized out>) at /nix/store/h31cy7jm6g7cfqbhc5pm4rf9c53i3qfb-gcc-9.3.0/include/c++/9.3.0/ext/new_allocator.h:80
2020-12-22 11:15:29 +01:00
Eelco Dolstra
346baec783
Move doc() to Args 2020-12-21 13:32:23 +01:00
Eelco Dolstra
a8f533b664 Add lvlNotice log level
This is like syslog's LOG_NOTICE: "normal, but significant,
condition".
2020-12-10 16:41:24 +01:00
Maximilian Bosch
93a8a005de
libstore/openStore: fix stores with IPv6 addresses
In `nixStable` (2.3.7 to be precise) it's possible to connect to stores
using an IPv6 address:

  nix ping-store --store ssh://root@2001:db8::1

This is also useful for `nixops(1)` where you could specify an IPv6
address in `deployment.targetHost`.

However, this behavior is broken on `nixUnstable` and fails with the
following error:

  $ nix store ping --store ssh://root@2001:db8::1
  don't know how to open Nix store 'ssh://root@2001:db8::1'

This happened because `openStore` from `libstore` uses the `parseURL`
function from `libfetchers` which expects a valid URL as defined in
RFC2732. However, this is unsupported by `ssh(1)`:

  $ nix store ping --store 'ssh://root@[2001:db8::1]'
  cannot connect to 'root@[2001:db8::1]'

This patch now allows both ways of specifying a store (`root@2001:db8::1`) and
also `root@[2001:db8::1]` since the latter one is useful to pass query
parameters to the remote store.

In order to achieve this, the following changes were made:

* The URL regex from `url-parts.hh` now allows an IPv6 address in the
  form `2001:db8::1` and also `[2001:db8::1]`.

* In `libstore`, a new function named `extractConnStr` ensures that a
  proper URL is passed to e.g. `ssh(1)`:

  * If a URL looks like either `[2001:db8::1]` or `root@[2001:db8::1]`,
    the brackets will be removed using a regex. No additional validation
    is done here as only strings parsed by `parseURL` are expected.

  * In any other case, the string will be left untouched.

* The rules above only apply for `LegacySSHStore` and `SSHStore` (a.k.a
  `ssh://` and `ssh-ng://`).

Unresolved questions:

* I'm not really sure whether we want to allow both variants of IPv6
  addresses in the URL parser. However it should be noted that both seem
  to be possible according to RFC2732:

  > This document incudes an update to the generic syntax for Uniform
  > Resource Identifiers defined in RFC 2396 [URL].  It defines a syntax
  > for IPv6 addresses and allows the use of "[" and "]" within a URI
  > explicitly for this reserved purpose.

* Currently, it's not supported to specify a port number behind the
  hostname, however it seems as this is not really supported by the URL
  parser. Hence, this is probably out of scope here.
2020-12-09 12:23:29 +01:00
Eelco Dolstra
af373c2ece Add deprecated aliases for renamed commands 2020-12-03 22:45:44 +01:00
regnat
a8a96dbaf8 Add forgotten override annotation 2020-12-02 14:23:38 +01:00
Eelco Dolstra
1b79b5b983 read(): Use char * instead of unsigned char *
This gets rid of some pointless casts.
2020-12-02 14:17:27 +01:00
Eelco Dolstra
faa31f4084 Sink: Use std::string_view 2020-12-02 14:17:27 +01:00
Eelco Dolstra
aa68486112 writeFull/writeFile: Use std::string_view 2020-12-02 14:17:27 +01:00
Eelco Dolstra
88798613ee replaceStrings(): Use std::string_view 2020-12-01 13:45:43 +01:00
Eelco Dolstra
c0d1354b7d Macro hygiene 2020-12-01 13:45:06 +01:00
Eelco Dolstra
e224c16d28 Macro hygiene 2020-12-01 13:43:33 +01:00
Dominique Martinet
1fd13d67e8 archive: disable preallocate-contents by default
using fallocate() to preallocate files space does more harm than good:
 - breaks compression on btrfs
 - has been called "not the right thing to do" by xfs developers
(because delayed allocation that most filesystems implement leads to smarter
allocation than what the filesystem needs to do if we upfront fallocate files)
2020-11-26 14:26:57 +01:00
Eelco Dolstra
0287f83057 Ask for confirmation before allowing flake Nix configuration settings 2020-11-26 12:37:23 +01:00
Eelco Dolstra
ef84c780bb
filterANSIEscapes(): Handle UTF-8 characters 2020-11-16 16:41:53 +01:00
Ben Burdette
7d9037035e usage example location 2020-11-11 09:21:26 -07:00
Ricardo M. Correia
108a2dab7e Fix stack overflow introduced in #4206 2020-11-10 04:25:24 +01:00
Eelco Dolstra
b87f84cf55
Fix appending to Setting<StringSet>
Fixes: warning: unknown setting 'extra-sandbox-paths'
2020-11-09 15:04:34 +01:00
Robert Hensing
c4d903ddb0 Fix memory corruption caused by GC-invisible coroutine stacks
Crucially this introduces BoehmGCStackAllocator, but it also
adds a bunch of wiring to avoid making libutil depend on bdw-gc.

Part of the solutions for #4178, #4200
2020-10-30 21:21:59 +01:00
Eelco Dolstra
dc5696b84f Fix test 2020-10-30 12:00:53 +01:00
Eelco Dolstra
7f56cf67ba Fix assertion failure in tab completion for --option 2020-10-29 18:26:35 +01:00
Eelco Dolstra
ff4dea63c9 Generalize extra-* settings
This removes the extra-substituters and extra-sandbox-paths settings
and instead makes every array setting extensible by setting
"extra-<name> = <value>" in the configuration file or passing
"--<name> <value>" on the command line.
2020-10-29 18:17:39 +01:00
Eelco Dolstra
662e67f8de
Merge pull request #4198 from mkenigs/capitalize-JSON
Capitalize JSON for consistency
2020-10-29 07:34:34 +01:00
Matthew Kenigsberg
6a4bf535d8 Capitalize JSON for consistency 2020-10-28 17:54:28 -05:00
Eelco Dolstra
a5019f0508 Consistency 2020-10-28 20:45:57 +01:00
Eelco Dolstra
14aecbb288 BaseSetting<StringMap>::set(): Don't append to previous value 2020-10-26 20:36:46 +01:00
Eelco Dolstra
9d5e9ef0da Move Explicit 2020-10-26 17:01:20 +01:00
John Ericson
64be1c15c2 Add missing include for MAX_PATH
And remove one that we didn't actually need to add
2020-10-15 19:05:17 +00:00
John Ericson
fccef6a7fa Merge remote-tracking branch 'upstream/master' into fix-and-ci-static-builds 2020-10-15 18:55:03 +00:00
John Ericson
aef44cbaa9 Split out commonChildInit 2020-10-11 16:38:46 +00:00
Eelco Dolstra
59bd6e87a4 Completions::add(): Guard against newlines 2020-10-09 21:55:59 +02:00
Eelco Dolstra
ea4b2b985f
Merge pull request #4128 from tweag/extended-completions
Add a zsh completion script
2020-10-09 21:53:12 +02:00
John Ericson
39de73550d Merge remote-tracking branch 'upstream/master' into fix-and-ci-static-builds 2020-10-09 18:26:47 +00:00
Eelco Dolstra
e845d19ae3 Remove Lazy
This fixes a crash during startup when compiling Nix as a single
compilation unit.
2020-10-09 17:54:59 +02:00
Eelco Dolstra
87157b2bd3 writeFile(): Add error context to writeFull() failure
Issue #4092.
2020-10-09 16:02:53 +02:00
regnat
04e5d0e704 Add a description in the completion outputs
Make nix output completions in the form `completion\tdescription`.
This can't be used by bash (afaik), but other shells like zsh or fish
can display it along the completion choices
2020-10-09 09:39:51 +02:00
Eelco Dolstra
be149acfda Serialize exceptions from the sandbox process to the parent
Fixes #4118.
2020-10-07 16:34:03 +02:00
Eelco Dolstra
27ca87c46a Formatting 2020-10-07 16:33:19 +02:00
Maximilian Bosch
59f2dd8e8d
libfetchers/github: allow slashes in refs
Refs #4061
2020-10-06 20:08:51 +02:00