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88 lines
3.9 KiB
Markdown
88 lines
3.9 KiB
Markdown
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# Release 1.11 (2016-01-19)
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This is primarily a bug fix release. It also has a number of new
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features:
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- `nix-prefetch-url` can now download URLs specified in a Nix
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expression. For example,
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$ nix-prefetch-url -A hello.src
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will prefetch the file specified by the `fetchurl` call in the
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attribute `hello.src` from the Nix expression in the current
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directory, and print the cryptographic hash of the resulting file on
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stdout. This differs from `nix-build -A
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hello.src` in that it doesn't verify the hash, and is thus useful
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when you’re updating a Nix expression.
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You can also prefetch the result of functions that unpack a tarball,
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such as `fetchFromGitHub`. For example:
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$ nix-prefetch-url --unpack https://github.com/NixOS/patchelf/archive/0.8.tar.gz
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or from a Nix expression:
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$ nix-prefetch-url -A nix-repl.src
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- The builtin function `<nix/fetchurl.nix>` now supports downloading
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and unpacking NARs. This removes the need to have multiple downloads
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in the Nixpkgs stdenv bootstrap process (like a separate busybox
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binary for Linux, or curl/mkdir/sh/bzip2 for Darwin). Now all those
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files can be combined into a single NAR, optionally compressed using
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`xz`.
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- Nix now supports SHA-512 hashes for verifying fixed-output
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derivations, and in `builtins.hashString`.
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- The new flag `--option build-repeat
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N` will cause every build to be executed N+1 times. If the build
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output differs between any round, the build is rejected, and the
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output paths are not registered as valid. This is primarily useful
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to verify build determinism. (We already had a `--check` option to
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repeat a previously succeeded build. However, with `--check`,
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non-deterministic builds are registered in the DB. Preventing that
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is useful for Hydra to ensure that non-deterministic builds don't
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end up getting published to the binary cache.)
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- The options `--check` and `--option
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build-repeat N`, if they detect a difference between two runs of the
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same derivation and `-K` is given, will make the output of the other
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run available under `store-path-check`. This makes it easier to
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investigate the non-determinism using tools like `diffoscope`, e.g.,
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$ nix-build pkgs/stdenv/linux -A stage1.pkgs.zlib --check -K
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error: derivation ‘/nix/store/l54i8wlw2265…-zlib-1.2.8.drv’ may not
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be deterministic: output ‘/nix/store/11a27shh6n2i…-zlib-1.2.8’
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differs from ‘/nix/store/11a27shh6n2i…-zlib-1.2.8-check’
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$ diffoscope /nix/store/11a27shh6n2i…-zlib-1.2.8 /nix/store/11a27shh6n2i…-zlib-1.2.8-check
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…
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├── lib/libz.a
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│ ├── metadata
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│ │ @@ -1,15 +1,15 @@
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│ │ -rw-r--r-- 30001/30000 3096 Jan 12 15:20 2016 adler32.o
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…
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│ │ +rw-r--r-- 30001/30000 3096 Jan 12 15:28 2016 adler32.o
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…
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- Improved FreeBSD support.
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- `nix-env -qa --xml --meta` now prints license information.
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- The maximum number of parallel TCP connections that the binary cache
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substituter will use has been decreased from 150 to 25. This should
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prevent upsetting some broken NAT routers, and also improves
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performance.
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- All "chroot"-containing strings got renamed to "sandbox". In
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particular, some Nix options got renamed, but the old names are
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still accepted as lower-priority aliases.
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This release has contributions from Anders Claesson, Anthony Cowley,
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Bjørn Forsman, Brian McKenna, Danny Wilson, davidak, Eelco Dolstra,
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Fabian Schmitthenner, FrankHB, Ilya Novoselov, janus, Jim Garrison, John
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Ericson, Jude Taylor, Ludovic Courtès, Manuel Jacob, Mathnerd314, Pascal
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Wittmann, Peter Simons, Philip Potter, Preston Bennes, Rommel M.
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Martinez, Sander van der Burg, Shea Levy, Tim Cuthbertson, Tuomas
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Tynkkynen, Utku Demir and Vladimír Čunát.
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