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I copied the configure.ac code about CC_FOR_BUILD from libX11.
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* src/libstore/build.cc (nix::DerivationGoal::startBuilder): Create
/etc/group showing the build user's group.
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* src/libstore/build.cc (nix::DerivationGoal::startBuilder): Fix the GID
of the build user in /etc/passwd.
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* src/libstore/build.cc (nix::DerivationGoal::startBuilder): Don't
display any supplementary groups for `nixbld' in /etc/passwd.
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* Don't refer to config.h in util.hh, because config.h is not
installed (http://hydra.nixos.org/build/303053).
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hooks for silence. It's unnecessary because the remote nix-store
command is already monitoring the real build.
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This prevents remote builders from being killed by the
`max-silent-time' inactivity monitor while they are waiting for a
long garbage collection to finish. This happens fairly often in the
Hydra build farm.
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POSIX locks, and simulates Unix-style file deletion semantics
sufficiently. Note that this means that Nix won't work on Cygwin
1.5 anymore.
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/nix/var/nix/db.
* Removed the function writeStringToFile since it does (almost) the
same thing as writeFile.
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zero bytes long. That makes Nix more robust in case of crashes
(especially on ext4).
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multiple paths specified on the command line (from O(n * m) to O(n +
m), where n is the number of arguments and m is the size of the
closure).
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is enabled by not depending on the deriver.
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works correctly in weird environments where the SIGCHLD handler is
set to "ignore".
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_FILE_OFFSET_BITS=64. Without it, functions like stat() fail on
large file sizes. This happened with a Nix store on squashfs:
$ nix-store --dump /tmp/mnt/46wzqnk4cbdwh1dclhrpqnnz1icak6n7-local-net-cmds > /dev/null
error: getting attributes of path `/tmp/mnt/46wzqnk4cbdwh1dclhrpqnnz1icak6n7-local-net-cmds': Value too large for defined data type
$ stat /tmp/mnt/46wzqnk4cbdwh1dclhrpqnnz1icak6n7-local-net-cmds
File: `/tmp/mnt/46wzqnk4cbdwh1dclhrpqnnz1icak6n7-local-net-cmds'
Size: 0 Blocks: 36028797018963968 IO Block: 1024 regular empty file
(This is a bug in squashfs or mksquashfs, but it shouldn't cause Nix
to fail.)
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tag used in naming 'struct _ATerm'".
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readOnlyMode is set.
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(http://hydra.nixos.org/build/156340).
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the "bytes/blocks freed" statistics.
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less biased towards deleting paths that come alphabetically first
(e.g. /nix/store/000...). This matters when using --max-freed etc.
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collector roots that point (directly or indirectly) to the given
paths.
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root symlink, not just its target. E.g.:
/nix/var/nix/profiles/system-99-link -> /nix/store/76kwf88657nq7wgk1hx3l1z5q91zb9wd-system
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complete set of live and dead paths before starting the actual
deletion, but determines liveness on demand. I.e. for any path in
the store, it first tries to delete all the referrers, and then the
path itself. This means that the collector can start deleting paths
almost immediately.
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(Linux) machines no longer maintain the atime because it's too
expensive, and on the machines where --use-atime is useful (like the
buildfarm), reading the atimes on the entire Nix store takes way too
much time to make it practical.
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fails. This is likely to happen after a `nix-store --optimise',
because some files may have 32000 links (NIX-111).
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show the string, not the ATerm, so we get `trace: bla' instead of
`trace: Str("bla",[])'.
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pass derivation paths to a builder without actually building them.
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trying to upgrade a package.
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manager work on OpenSolaris
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apparently).
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of them leave the evaluator in a continuable state. Also, it should
be less chatty.
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intersectAttrs returns the (right-biased) intersection between two
attribute sets, e.g. every attribute from the second set that also
exists in the first. functionArgs returns the set of attributes
expected by a function.
The main goal of these is to allow the elimination of most of
all-packages.nix. Most package instantiations in all-packages.nix
have this form:
foo = import ./foo.nix {
inherit a b c;
};
With intersectAttrs and functionArgs, this can be written as:
foo = callPackage (import ./foo.nix) { };
where
callPackage = f: args:
f ((builtins.intersectAttrs (builtins.functionArgs f) pkgs) // args);
I.e., foo.nix is called with all attributes from "pkgs" that it
actually needs (e.g., pkgs.a, pkgs.b and pkgs.c). (callPackage can
do any other generic package-level stuff we might want, such as
applying makeOverridable.) Of course, the automatically supplied
arguments can be overriden if needed, e.g.
foo = callPackage (import ./foo.nix) {
c = c_version_2;
};
but for the vast majority of packages, this won't be needed.
The advantages are to reduce the amount of typing needed to add a
dependency (from three sites to two), and to reduce the number of
trivial commits to all-packages.nix. For the former, there have
been two previous attempts:
- Use "args: with args;" in the package's function definition.
This however obscures the actual expected arguments of a
function, which is very bad.
- Use "{ arg1, arg2, ... }:" in the package's function definition
(i.e. use the ellipis "..." to allow arbitrary additional
arguments), and then call the function with all of "pkgs" as an
argument. But this inhibits error detection if you call it with
an misspelled (or obsolete) argument.
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useful for fields like meta.maintainers, meta.priority (which can be
a proper integer now) and even meta.license (if there are multiple
licenses).
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NixOS evaluation errors in particular look intimidating and
generally aren't very useful. Ideally the builtins.throw messages
should be self-contained.
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