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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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zombie at a time, so if multiple children died before the handler
got to run, some of them would not be cleaned up.
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build progress.
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* --dry-run: print the paths that we don't know how to build/substitute.
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* The garbage collector now also prints the number of blocks freed.
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in /nix/var/nix/temproots.
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https://svn.nixos.org/repos/nix/nix/branches/no-bdb).
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This isn't usually a problem, except that it causes tests to fail
when performed in a directory with a very long path name. So chdir
to the socket directory and use a relative path name.
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builds (which are done as root...).
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* queryDeriver in daemon mode: don't barf if the other side returns an
empty string (which means there is no deriver).
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in multi-user Nix (NIX-72).
* Client/worker: exchange a protocol version number for future
compatibility.
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(/nix/var/nix/daemon-socket). This allows access to the Nix daemon
to be restricted by setting the mode/ownership on that directory as
desired, e.g.
$ chmod 770 /nix/var/nix/daemon-socket
$ chown root.wheel /nix/var/nix/daemon-socket
to allow only users in the wheel group to use Nix.
Setting the ownership on a socket is much trickier, since the socket
must be deleted and recreated every time the daemon is started
(which would require additional Nix configuration file directives to
specify the mode/ownership, and wouldn't support arbitrary ACLs),
some BSD variants appear to ignore permissions on sockets, and it's
not clear whether the umask is respected on every platform when
creating sockets.
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unexpected conditions in the SIGPOLL handler, since that messes up
the Berkeley DB environment (which a client must never be able to
trigger).
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always requires a signature on the archive. This is to ensure that
unprivileged users cannot add Trojan horses to the Nix store.
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from a source directory. All files for which a predicate function
returns true are copied to the store. Typical example is to leave
out the .svn directory:
stdenv.mkDerivation {
...
src = builtins.filterSource
(path: baseNameOf (toString path) != ".svn")
./source-dir;
# as opposed to
# src = ./source-dir;
}
This is important because the .svn directory influences the hash in
a rather unpredictable and variable way.
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that might mess up the protocol. And besides, the socket file
descriptor is probably closed.
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right thing on FreeBSD 4 (it leaves zombies).
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`nix-store --delete'. But unprivileged users are not allowed to
ignore liveness.
* `nix-store --delete --ignore-liveness': ignore the runtime roots as
well.
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process, so forward the operation.
* Spam the user about GC misconfigurations (NIX-71).
* findRoots: skip all roots that are unreadable - the warnings with
which we spam the user should be enough.
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processes can register indirect roots. Of course, there is still
the problem that the garbage collector can only read the targets of
the indirect roots when it's running as root...
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* SIGIO -> SIGPOLL (POSIX calls it that).
* Use sigaction instead of signal to register the SIGPOLL handler.
Sigaction is better defined, and a handler registered with signal
appears not to interrupt fcntl(..., F_SETLKW, ...), which is bad.
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via the Unix domain socket in /nix/var/nix/daemon.socket. The
server forks a worker process per connection.
* readString(): use the heap, not the stack.
* Some protocol fixes.
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* Allow the worker path to be overriden through the NIX_WORKER
environment variable.
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* Send startup errors to the client.
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between the last worker read/write and the enabling of the signal
handler.
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The problem is that when we kill the client while the worker is
building, and the builder is not writing anything to stderr, then
the worker never notice that the socket is closed on the other side,
so it just continues indefinitely. The solution is to catch SIGIO,
which is sent when the far side of the socket closes, and simulate
an normal interruption. Of course, SIGIO is also sent every time
the client sends data over the socket, so we only enable the signal
handler when we're not expecting any data...
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client.
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from interfering.
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syncWithGC() to allow clients to register GC roots without needing
write access to the global roots directory or the GC lock.
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* Help for nix-worker.
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* addToStore now adds unconditionally, it doesn't use readOnlyMode.
Read-only operation is up to the caller (who can call
computeStorePathForPath).
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* addToStore() and friends: don't do a round-trip to the worker if
we're only interested in the path (i.e., in read-only mode).
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* Added new operation hasSubstitutes(), which is more efficient than
querySubstitutes().size() > 0.
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