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build progress.
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when upgrading Nix.
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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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* The garbage collector now also prints the number of blocks freed.
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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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* nix-store --register-validity: option to supply the content hash of
each path.
* Removed compatibility with Nix <= 0.7 stores.
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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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need any info on substitutable paths, we just call the substituters
(such as download-using-manifests.pl) directly. This means that
it's no longer necessary for nix-pull to register substitutes or for
nix-channel to clear them, which makes those operations much faster
(NIX-95). Also, we don't have to worry about keeping nix-pull
manifests (in /nix/var/nix/manifests) and the database in sync with
each other.
The downside is that there is some overhead in calling an external
program to get the substitutes info. For instance, "nix-env -qas"
takes a bit longer.
Abolishing the substitutes table also makes the logic in
local-store.cc simpler, as we don't need to store info for invalid
paths. On the downside, you cannot do things like "nix-store -qR"
on a substitutable but invalid path (but nobody did that anyway).
* Never catch interrupts (the Interrupted exception).
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environment cleanly even when an exception is thrown from a
destructor. We still crash, but we don't take all other Nix
processes with us.
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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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--export' into the Nix store, and optionally check the cryptographic
signatures against /nix/etc/nix/signing-key.pub. (TODO: verify
against a set of public keys.)
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path. This is like `nix-store --dump', only it also dumps the
meta-information of the store path (references, deriver). Will add
a `--sign' flag later to add a cryptographic signature, which we
will use for exchanging store paths between build farm machines in a
secure manner.
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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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`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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instead of forking a worker.
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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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client.
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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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mode. Presumably nix-worker would be setuid to the Nix store user.
The worker performs all operations on the Nix store and database, so
the caller can be completely unprivileged.
This is already much more secure than the old setuid scheme, since
the worker doesn't need to do Nix expression evaluation and so on.
Most importantly, this means that it doesn't need to access any user
files, with all resulting security risks; it only performs pure
store operations.
Once this works, it is easy to move to a daemon model that forks off
a worker for connections established through a Unix domain socket.
That would be even more secure.
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