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links to the inputs.
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if they belong a path that's currently being built. This gets rid
of some Cygwin-specific code.
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accidentally bind-mount a directory twice.
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(http://hydra.nixos.org/nixlog/384/1).
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closure of the inputs. This really enforces that there can't be any
undeclared dependencies on paths in the store. This is done by
creating a fake Nix store and creating bind-mounts or hard-links in
the fake store for all paths in the closure. After the build, the
build output is moved from the fake store to the real store. TODO:
the chroot has to be on the same filesystem as the Nix store for
this to work, but this isn't enforced yet. (I.e. it only works
currently if /tmp is on the same FS as /nix/store.)
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don't have to put the chroot in /nix/var/nix/chroots anymore.
They're back in /tmp now.
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happy.
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bind-mounts we do are only visible to the builder process and its
children. So accidentally doing "rm -rf" on the chroot directory
won't wipe out /nix/store and other bind-mounted directories
anymore. Also, the bind-mounts in the private namespace disappear
automatically when the builder exits.
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read-only operations (like nix-env -qa) work properly when the
daemon isn't running.
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necessary that at least one build hook doesn't return "postpone",
otherwise nix-store will barf ("waiting for a build slot, yet there
are no running children"). So inform the build hook when this is
the case, so that it can start a build even when that would exceed
the maximum load on a machine.
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the client to a temporary directory, as that is highly inefficient.
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being copied 3 times in the worst case. It doesn't run in constant space,
but it didn't do that anyway.
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SHA-256 outputs of fixed-output derivations. I.e. they now produce
the same store path:
$ nix-store --add x
/nix/store/j2fq9qxvvxgqymvpszhs773ncci45xsj-x
$ nix-store --add-fixed --recursive sha256 x
/nix/store/j2fq9qxvvxgqymvpszhs773ncci45xsj-x
the latter being the same as the path that a derivation
derivation {
name = "x";
outputHashAlgo = "sha256";
outputHashMode = "recursive";
outputHash = "...";
...
};
produces.
This does change the output path for such fixed-output derivations.
Fortunately they are quite rare. The most common use is fetchsvn
calls with SHA-256 hashes. (There are a handful of those is
Nixpkgs, mostly unstable development packages.)
* Documented the computation of store paths (in store-api.cc).
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and don't indicate path validity.
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subtle and often hard-to-reproduce bugs where programs in pipes
either barf with a "Broken pipe" message or not, depending on the
exact timing conditions. This particularly happened in GNU M4 (and
Bison, which uses M4).
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build progress.
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disasters involving `rm -rf' on bind mounts. Will try the
definitive fix (per-process mounts, apparently possible via the
CLONE_NEWNS flag in clone()) some other time.
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This fixes problems such as Tcl's PTY handling:
ERROR: The system has no more ptys. Ask your system administrator to
create more.
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accessed time of paths that may be deleted. Anything more recently
used won't be deleted. The time is specified in time_t,
e.g. seconds since 1970-01-01 00:00:00 UTC; use `date +%s' to
convert to time_t from the command line.
Example: to delete everything that hasn't been used in the last two
months:
$ nix-store --gc -v --max-atime $(date +%s -d "2 months ago")
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order of ascending last access time. This is useful in conjunction
with --max-freed or --max-links to prefer deleting non-recently used
garbage, which is good (especially in the build farm) since garbage
may become live again.
The code could easily be modified to accept other criteria for
ordering garbage by changing the comparison operator used by the
priority queue in collectGarbage().
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particular, dietlibc cannot figure out the cwd because the inode of
the current directory doesn't appear in .. (because getdents returns
the inode of the mount point).
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need a writable /tmp (they don't respect $TMPDIR).
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need /etc in the chroot (in particular, /etc/resolv.conf for
fetchurl). Not having /etc/resolv.conf in the chroot is a good
thing, since we don't want normal derivations to download files.
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~/.nix-defexpr, otherwise the attribute cannot be selected with the
`-A' option. Useful if you want to stick a Nix expression directly
in ~/.nix-defexpr.
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when upgrading Nix.
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fail on slow machines. Of course it would be better if this test
wasn't timing dependent...
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downloads.
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* --dry-run: print the paths that we don't know how to build/substitute.
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again. (After the previous substituter mechanism refactoring I
didn't update the code that obtains the references of substitutable
paths.) This required some refactoring: the substituter programs
are now kept running and receive/respond to info requests via
stdin/stdout.
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can do operations like "nix-store -qR <path>" even without the Nix
daemon).
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bytes have been freed, `--max-links' to stop when the Nix store
directory has fewer than N hard links (the latter being important
for very large Nix stores on filesystems with a 32000 subdirectories
limit).
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(There can easily be more than 32000 occurrences of the empty file.)
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* The garbage collector now also prints the number of blocks freed.
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store under the reference relation, since that means that the
garbage collector will need a long time to start deleting paths.
Instead just delete the referrers of a path first.
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https://svn.nixos.org/repos/nix/nix/branches/no-bdb).
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