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Shell completion improvements
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https://github.com/flox/nix
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doc: document nix.conf connect-timeout default
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Make InstallableFlake::toValue() and toDerivation() behave consistently
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Support for the `tgz` shorthand was added in
52f5fa948a4784b6a9b707770f4beee6a8674dee.
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Co-authored-by: Cole Helbling <cole.e.helbling@outlook.com>
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`nix eval`: Add option `--read-only`
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assert hash types for Git and Mercurial
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In particular, this means that 'nix eval` (which uses toValue()) no
longer auto-calls functions or functors (because
AttrCursor::findAlongAttrPath() doesn't).
Fixes #6152.
Also use ref<> in a few places, and don't return attrpaths from
getCursor() because cursors already have a getAttrPath() method.
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libfetchers: Fix assertion (Mercurial)
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Allow empty path segments in urls
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libfetchers: Replace regex to clarify intent
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Previously it only logged the builder's path, this changes it to log the
arguments at the same log level, and the environment variables at the
vomit level.
This helped me debug https://github.com/svanderburg/node2nix/issues/75
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See commit 1e1cd6e7a for more information.
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don't assume that rev is a SHA1 hash
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Valid per https://datatracker.ietf.org/doc/html/rfc3986#section-3.3 (and
also somewhat frequently happening for local paths)
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This was a problem when writing a fetcher that uses e.g. sha256 hashes
for revisions. This doesn't actually do anything new, but allows for
creating such fetchers in the future (perhaps when support for Git's
SHA256 object format gains more popularity).
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libutil: Fix restoring mount namespace
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libfetchers: Fix assertion
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The filter expects all paths to have a prefix of the raw `actualUrl`, but
`Store::addToStore(...)` provides absolute canonicalized paths.
To fix this create an absolute and canonicalized path from the `actualUrl` and
use it instead.
Fixes #6195.
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This was caused by SubstitutionGoal not setting the errorMsg field in
its BuildResult. We now get a more descriptive message than in 2.7.0, e.g.
error: path '/nix/store/13mh...' is required, but there is no substituter that can build it
instead of the misleading (since there was no build)
error: build of '/nix/store/13mh...' failed
Fixes #6295.
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Allowing this is a potential security hole, since it allows the user
to specify parameters like 'local-nar-cache'.
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libutil: Reserve memory when en/decoding base64
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`string_view::find_first_not_of(...)` and
`string_view::find_first_of(...)` return `string_view::npos` on error
not `string::npos`.
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The size of the output when encoding to and decoding from base64 is
(roughly) known so we can allocate it in advance to prevent
reallocation.
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doctor: Always show the output
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Fix https://github.com/NixOS/nix/issues/6342
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Fix https://github.com/NixOS/nix/issues/6321
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Saving the cwd fd didn't actually work well -- prior to this commit, the
following would happen:
: ~/w/vc/nix ; doas outputs/out/bin/nix --experimental-features 'nix-command flakes' run nixpkgs#coreutils -- --coreutils-prog=pwd
pwd: couldn't find directory entry in ‘../../../..’ with matching i-node
: ~/w/vc/nix ; doas outputs/out/bin/nix --experimental-features 'nix-command flakes' develop -c pwd
pwd: couldn't find directory entry in ‘../../../..’ with matching i-node
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This doesn't work very well (maybe I'm misunderstanding the desired
implementation):
: ~/w/vc/nix ; doas outputs/out/bin/nix --experimental-features 'nix-command flakes' develop -c pwd
pwd: couldn't find directory entry in ‘../../../..’ with matching i-node
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Co-authored-by: Eelco Dolstra <edolstra@gmail.com>
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It's a GNU extension, as pointed out by pennae.
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Just in case making libutil depend on std::filesystem is unacceptable,
here is the non-filesystem approach.
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I regularly pass around simple scripts by using nix-shell as the script
interpreter, eg. like this:
#!/usr/bin/env nix-shell
#!nix-shell -p dd_rescue coreutils bash -i bash
While this works most of the time, I recently had one occasion where it
would not and the above would result in the following:
$ sudo ./myscript.sh
bash: ./myscript.sh: No such file or directory
Note the "sudo" here, because this error only occurs if we're root.
The reason for the latter is because running Nix as root means that we
can directly access the store, which makes sure we use a filesystem
namespace to make the store writable. XXX - REWORD!
So when stracing the process, I stumbled on the following sequence:
openat(AT_FDCWD, "/proc/self/ns/mnt", O_RDONLY) = 3
unshare(CLONE_NEWNS) = 0
... later ...
getcwd("/the/real/cwd", 4096) = 14
setns(3, CLONE_NEWNS) = 0
getcwd("/", 4096) = 2
In the whole strace output there are no calls to chdir() whatsoever, so
I decided to look into the kernel source to see what else could change
directories and found this[1]:
/* Update the pwd and root */
set_fs_pwd(fs, &root);
set_fs_root(fs, &root);
The set_fs_pwd() call is roughly equivalent to a chdir() syscall and
this is called when the setns() syscall is invoked[2].
[1]: https://github.com/torvalds/linux/blob/b14ffae378aa1db993e62b01392e70d1e585fb23/fs/namespace.c#L4659
[2]: https://github.com/torvalds/linux/blob/b14ffae378aa1db993e62b01392e70d1e585fb23/kernel/nsproxy.c#L346
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profile!: consistent use of url/uri. create new version
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https://hydra.nixos.org/build/171351131
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Impure derivations
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