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Issue #231.
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Ludo reported this error:
unexpected Nix daemon error: boost::too_few_args: format-string refered to more arguments than were passed
coming from this line:
printMsg(lvlError, run.program + ": " + string(err, 0, p));
The problem here is that the string ends up implicitly converted to a
Boost format() object, so % characters are treated specially. I
always assumed (wrongly) that strings are converted to a format object
that outputs the string as-is.
Since this assumption appears in several places that may be hard to
grep for, I've added some C++ type hackery to ensures that the right
thing happens. So you don't have to worry about % in statements like
printMsg(lvlError, "foo: " + s);
or
throw Error("foo: " + s);
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The daemon now creates /dev deterministically (thanks!). However, it
expects /dev/kvm to be present.
The patch below restricts that requirement (1) to Linux-based systems,
and (2) to systems where /dev/kvm already exists.
I’m not sure about the way to handle (2). We could special-case
/dev/kvm and create it (instead of bind-mounting it) in the chroot, so
it’s always available; however, it wouldn’t help much since most likely,
if /dev/kvm missing, then KVM support is missing.
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Currently, clients cannot recover from an isValidPath RPC with an
invalid path parameter because the daemon closes the connection when
that happens.
More precisely:
1. in performOp, wopIsValidPath case, ‘readStorePath’ raises an
‘Error’ exception;
2. that exception is caught by the handler in ‘processConnection’;
3. the handler determines errorAllowed == false, and thus exits after
sending the message.
This last part is fixed by calling ‘startWork’ early on, as in the patch
below.
The same reasoning could be applied to all the RPCs that take one or
more store paths as inputs, but isValidPath is, by definition, likely to
be passed invalid paths in the first place, so it’s important for this
one to allow recovery.
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Fixes #225.
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Since the meta attributes were not sorted, attribute lookup could
fail, leading to package priorities and active flags not working
correctly.
Broken since 0f24400d90daf65cf20142a662f8245008437e2c.
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This reverts commit 273322c7732093a354e86df82cf75d6604b8bce8.
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Not bind-mounting the /dev from the host also solves the problem with
/dev/shm being a symlink to something not in the chroot.
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If we're evaluating some application ‘v = f x’, we can't store ‘f’
temporarily in ‘v’, because if ‘f x’ refers to ‘v’, it will get ‘f’
rather than an infinite recursion error.
Unfortunately, this breaks the tail call optimisation introduced in
c897bac54954373f63511702731fe2cb23c0c98e.
Fixes #217.
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We were relying on SubstitutionGoal's destructor releasing the lock,
but if a goal is a top-level goal, the destructor won't run in a
timely manner since its reference count won't drop to zero. So
release it explicitly.
Fixes #178.
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Fixes #68.
Fixes #117.
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Fixes #121. Note that we don't warn about missing $NIX_PATH entries
because it's intended that some may be missing (cf. the default
$NIX_PATH on NixOS, which includes paths like /etc/nixos/nixpkgs for
backward compatibility).
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It defaults to false and can be overridden by RemoteStore.
Untested currently, just quickly put this together
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--dry-run is more consistent with nix-env and nix-store.
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line
This is basically a shortcut for ‘echo 'expr...' | nix-instantiate -’.
Also supported by nix-build and nix-shell.
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The flag ‘--check’ to ‘nix-store -r’ or ‘nix-build’ will cause Nix to
redo the build of a derivation whose output paths are already valid.
If the new output differs from the original output, an error is
printed. This makes it easier to test if a build is deterministic.
(Obviously this cannot catch all sources of non-determinism, but it
catches the most common one, namely the current time.)
For example:
$ nix-build '<nixpkgs>' -A patchelf
...
$ nix-build '<nixpkgs>' -A patchelf --check
error: derivation `/nix/store/1ipvxsdnbhl1rw6siz6x92s7sc8nwkkb-patchelf-0.6' may not be deterministic: hash mismatch in output `/nix/store/4pc1dmw5xkwmc6q3gdc9i5nbjl4dkjpp-patchelf-0.6.drv'
The --check build fails if not all outputs are valid. Thus the first
call to nix-build is necessary to ensure that all outputs are valid.
The current outputs are left untouched: the new outputs are either put
in a chroot or diverted to a different location in the store using
hash rewriting.
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Mac OS X doesn't allow renaming a read-only directory.
http://hydra.nixos.org/build/9113895
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In particular, do replacing of valid paths during repair later. This
prevents us from replacing a valid path after the build fails.
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E.g. "--max-freed 10G" means "free ten gigabytes".
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This will allow Hydra to detect that a build should not be marked as
"permanently failed", allowing it to be retried later.
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Signed-off-by: Shea Levy <shea@shealevy.com>
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Signed-off-by: Shea Levy <shea@shealevy.com>
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Signed-off-by: Shea Levy <shea@shealevy.com>
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Signed-off-by: Shea Levy <shea@shealevy.com>
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Signed-off-by: Shea Levy <shea@shealevy.com>
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Signed-off-by: Shea Levy <shea@shealevy.com>
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Signed-off-by: Shea Levy <shea@shealevy.com>
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Signed-off-by: Shea Levy <shea@shealevy.com>
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This substituter connects to a remote host, runs nix-store --serve
there, and then forwards substituter commands on to the remote host and
sends their results to the calling program. The ssh-substituter-hosts
option can be specified as a list of hosts to try.
This is an initial implementation and, while it works, it has some
limitations:
* Only the first host is used
* There is no caching of query results (all queries are sent to the
remote machine)
* There is no informative output (such as progress bars)
* Some failure modes may cause unhelpful error messages
* There is no concept of trusted-ssh-substituter-hosts
Signed-off-by: Shea Levy <shea@shealevy.com>
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Signed-off-by: Shea Levy <shea@shealevy.com>
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Also remove signing support
Signed-off-by: Shea Levy <shea@shealevy.com>
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Signed-off-by: Shea Levy <shea@shealevy.com>
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