Commit graph

3385 commits

Author SHA1 Message Date
Eelco Dolstra a583a2bc59 Run the daemon worker on the same CPU as the client
On a system with multiple CPUs, running Nix operations through the
daemon is significantly slower than "direct" mode:

$ NIX_REMOTE= nix-instantiate '<nixos>' -A system
real    0m0.974s
user    0m0.875s
sys     0m0.088s

$ NIX_REMOTE=daemon nix-instantiate '<nixos>' -A system
real    0m2.118s
user    0m1.463s
sys     0m0.218s

The main reason seems to be that the client and the worker get moved
to a different CPU after every call to the worker.  This patch adds a
hack to lock them to the same CPU.  With this, the overhead of going
through the daemon is very small:

$ NIX_REMOTE=daemon nix-instantiate '<nixos>' -A system
real    0m1.074s
user    0m0.809s
sys     0m0.098s
2013-08-07 14:02:04 +02:00
Eelco Dolstra 263d668222 Set the default GCC optimisation level to -O3 2013-08-06 14:21:46 +02:00
Eelco Dolstra fd7d979c79 Remove obsolete reference to ATerms 2013-08-06 14:15:11 +02:00
Eelco Dolstra 46ffcce0c3 In the profiler output, show function names (if available) 2013-08-02 18:29:23 +00:00
Eelco Dolstra 8e74c0bfd1 Let the ordering operators also work on strings
E.g. ‘"foo" < "bar"’ now works.
2013-08-02 18:53:02 +02:00
Eelco Dolstra 3d77b28eac Add comparison operators ‘<’, ‘<=’, ‘>’ and ‘>=’ 2013-08-02 18:39:40 +02:00
Eelco Dolstra 47701677e8 Add integer ‘-’, ‘*’ and ‘/’ operators 2013-08-02 16:03:02 +00:00
Eelco Dolstra 5d147e125c Add a unary integer negation operator
This allows saying "-1" instead of "builtins.sub 0 1".
2013-08-02 15:43:31 +00:00
Eelco Dolstra 159e621d1a Overload the ‘+’ operator to support integer addition 2013-08-02 15:21:17 +00:00
Eelco Dolstra 511455965e nix-shell: Don't disable Automake dependency tracking
Nixpkgs' stdenv disables dependency tracking by default.  That makes
sense for one-time builds, but in an interactive environment we expect
repeated "make" invocations to do the right thing.
2013-07-31 13:17:50 +02:00
Eelco Dolstra 7df4ef983e Test the delayed with a bit more 2013-07-31 13:12:35 +02:00
Eelco Dolstra 0a470fc345 Make Env smaller
Commit 20866a7031 added a ‘withAttrs’
field to Env, which is annoying because it makes every Env structure
bigger and we allocate millions of them.  E.g. NixOS evaluation took
18 MiB more.  So this commit squeezes ‘withAttrs’ into values[0].
Probably should use a union...
2013-07-31 12:44:21 +02:00
Eelco Dolstra 8ae6d55db1 Don't use NULL 2013-07-31 12:11:14 +02:00
Shea Levy e068f49f7d Avoid thunks when a fromWith var can be looked up without evaluation
Signed-off-by: Shea Levy <shea@shealevy.com>
2013-07-31 11:48:39 +02:00
Shea Levy 20866a7031 Delay evaulation of with attrs until a variable lookup needs them
Evaluation of attribute sets is strict in the attribute names, which
means immediate evaluation of `with` attribute sets rules out some
potentially interesting use cases (e.g. where the attribute names of one
set depend in some way on another but we want to bring those names into
scope for some values in the second set).

The major example of this is overridable self-referential package sets
(e.g. all-packages.nix). With immediate `with` evaluation, the only
options for such sets are to either make them non-recursive and
explicitly use the name of the overridden set in non-overridden one
every time you want to reference another package, or make the set
recursive and use the `__overrides` hack. As shown in the test case that
comes with this commit, though, delayed `with` evaluation allows a nicer
third alternative.

Signed-off-by: Shea Levy <shea@shealevy.com>
2013-07-31 11:48:39 +02:00
Eelco Dolstra 70e68e0ec6 Detect stack overflows
Previously, if the Nix evaluator gets a stack overflow due to a deep
or infinite recursion in the Nix expression, the user gets an
unhelpful message ("Segmentation fault") that doesn't indicate that
the problem is in the user's code rather than Nix itself.  Now it
prints:

  error: stack overflow (possible infinite recursion)

This only works on x86_64-linux and i686-linux.

Fixes #35.
2013-07-30 23:37:10 +02:00
Shea Levy e87d1a63bd killUser: Don't let the child kill itself on Apple
The kill(2) in Apple's libc follows POSIX semantics, which means that
kill(-1, SIGKILL) will kill the calling process too. Since nix has no
way to distinguish between the process successfully killing everything
and the process being killed by a rogue builder in that case, it can't
safely conclude that killUser was successful.

Luckily, the actual kill syscall takes a parameter that determines
whether POSIX semantics are followed, so we can call that syscall
directly and avoid the issue on Apple.

Signed-off-by: Shea Levy <shea@shealevy.com>
2013-07-30 21:25:16 +02:00
Florian Friesdorf 7cf539c728 buildenv: remove special treatment of python files
buildPythonPackage does not leave easy_install.pth and site.py
anymore. A python package that leaves these files is broken. An
exception to this is setuptoolsSite which packages setuptools'
site.py. To include it into a buildenv, this patch is even needed, not
just cosmetic.
2013-07-23 20:13:43 +02:00
Eelco Dolstra 7b09e9f2c4 Add hacking notes plus a script for running nix-shell 2013-07-19 16:51:31 +02:00
Eelco Dolstra 15e5ac8039 nix-shell: Set $IN_NIX_SHELL
This allows scripts to distinguish between a real build and a Nix
shell.
2013-07-19 14:32:05 +02:00
Eelco Dolstra 48858ad5ca nix-shell: Set some environment variables also set by build.cc
Setting $NIX_STORE causes the purity checks in gcc/ld-wrapper to kick
in, so that's why we unset $NIX_ENFORCE_PURITY.
2013-07-19 14:06:58 +02:00
Eelco Dolstra 2bc5de8635 Rename ‘nix-build --run-env’ to ‘nix-shell’ 2013-07-19 12:02:44 +02:00
Eelco Dolstra dc5f2e7da6 nix-build --run-env: Add a ‘--pure’ flag
This causes the environment to be (almost) cleared, thus giving a
shell that more closely resembled the actual Nix derivation.
2013-07-19 11:23:32 +02:00
Eelco Dolstra a4921b8ceb Revert "build-remote.pl: Enforce timeouts locally"
This reverts commit 69b8f9980f.

The timeout should be enforced remotely.  Otherwise, if the garbage
collector is running either locally or remotely, if will block the
build or closure copying for some time.  If the garbage collector
takes too long, the build may time out, which is not what we want.
Also, on heavily loaded systems, copying large paths to and from the
remote machine can take a long time, also potentially resulting in a
timeout.
2013-07-18 12:52:29 +02:00
Shea Levy 16591eb3cc Allow bind-mounting regular files into the chroot
mount(2) with MS_BIND allows mounting a regular file on top of a regular
file, so there's no reason to only bind directories. This allows finer
control over just which files are and aren't included in the chroot
without having to build symlink trees or the like.

Signed-off-by: Shea Levy <shea@shealevy.com>
2013-07-15 16:01:33 +02:00
Eelco Dolstra c3f5413e80 Fix syntax error in unpack-channel 2013-07-12 14:06:05 +02:00
Eelco Dolstra aeb810b01e Garbage collector: Don't follow symlinks arbitrarily
Only indirect roots (symlinks to symlinks to the Nix store) are now
supported.
2013-07-12 14:03:36 +02:00
Gergely Risko 25a00cae5b Add gzip support for channel unpacking 2013-07-12 11:29:37 +02:00
Domen Kožar 620d57f036 doc: typo 2013-07-12 11:27:43 +02:00
Eelco Dolstra 6fcc290619 build-remote.pl: Move "building ..." message to a better place 2013-07-11 17:16:45 +02:00
Eelco Dolstra ed09d0c0a4 nix-build --run-env: Always use Bash
Fixes #113.
Fixes #131.
2013-07-11 14:40:29 +02:00
Eelco Dolstra 656390062a nix-build --run-env: Source $stdenv/setup in the interactive shell
This ensures that not just environment variables are set, but also
shell functions such as unpackPhase, configurePhase and so on.
2013-07-11 14:32:22 +02:00
Ludovic Courtès 212e96f39c Leave `HAVE_HUP_NOTIFICATION' undefined on GNU/Hurd. 2013-07-07 13:21:06 +02:00
Eelco Dolstra b584a42e3d Manual: auto-optimise-store is disabled by default 2013-07-03 18:35:59 +02:00
Eelco Dolstra 5116214343 Add support for uncompressed NARs in binary caches
Issue NixOS/hydra#102.
2013-07-01 21:03:14 +02:00
Eelco Dolstra 7986711632 copy-from-other-stores.pl: Respect $NIX_BIN_DIR 2013-07-01 13:30:28 +02:00
Eelco Dolstra 1917d750a0 copy-from-other-stores.pl: Report downloaded size as 0 2013-07-01 13:29:59 +02:00
Eelco Dolstra 7ccd946407 Don't set $preferLocalBuild and $requiredSystemFeatures in builders
With C++ std::map, doing a comparison like ‘map["foo"] == ...’ has the
side-effect of adding a mapping from "foo" to the empty string if
"foo" doesn't exist in the map.  So we ended up setting some
environment variables by accident.
2013-06-20 18:07:27 +00:00
Eelco Dolstra 5558652709 Don't substitute derivations that have preferLocalBuild set
In particular this means that "trivial" derivations such as writeText
are not substituted, reducing the number of GET requests to the binary
cache by about 200 on a typical NixOS configuration.
2013-06-20 19:26:31 +02:00
Eelco Dolstra 1906cce6fc Increase SQLite's auto-checkpoint interval
Common operations like instantiating a NixOS system config no longer
fitted in 8192 pages, leading to more fsyncs.  So increase this limit.
2013-06-20 14:01:33 +00:00
Eelco Dolstra 9b11165aec Disable the copy-from-other-stores substituter
This substituter basically cannot work reliably since we switched to
SQLite, since SQLite databases may need write access to open them even
just for reading (and in WAL mode they always do).
2013-06-20 12:01:33 +02:00
Eelco Dolstra 22144afa8d Don't keep "disabled" substituters running
For instance, it's pointless to keep copy-from-other-stores running if
there are no other stores, or download-using-manifests if there are no
manifests.  This also speeds things up because we don't send queries
to those substituters.
2013-06-20 11:55:15 +02:00
Eelco Dolstra 2b29e4b852 Bump version 2013-06-17 15:39:45 +02:00
Eelco Dolstra 6016bcd30e Update release notes for Nix 1.5.3 2013-06-17 11:47:38 +02:00
Eelco Dolstra 1b6ee8f4c7 Allow hard links between the outputs of a derivation 2013-06-13 17:29:56 +02:00
Eelco Dolstra cd49ee0897 Fix a security bug in hash rewriting
Before calling dumpPath(), we have to make sure the files are owned by
the build user.  Otherwise, the build could contain a hard link to
(say) /etc/shadow, which would then be read by the daemon and
rewritten as a world-readable file.

This only affects systems that don't have hard link restrictions
enabled.
2013-06-13 17:12:24 +02:00
Eelco Dolstra 1e2c7c04b1 Fix assertion failure in canonicalisePathMetaData() after hash rewriting
The assertion in canonicalisePathMetaData() failed because the
ownership of the path already changed due to the hash rewriting.  The
solution is not to check the ownership of rewritten paths.

Issue #122.
2013-06-13 17:12:06 +02:00
Eelco Dolstra 6cc2a8f8ed computeFSClosure: Only process the missing/corrupt paths
Issue #122.
2013-06-13 16:43:20 +02:00
Eelco Dolstra bfee9a2581 Typo 2013-06-13 14:51:11 +02:00
Eelco Dolstra f9ff67e948 In repair mode, update the hash of rebuilt paths
Otherwise subsequent invocations of "--repair" will keep rebuilding
the path.  This only happens if the path content differs between
builds (e.g. due to timestamps).
2013-06-13 14:46:07 +02:00