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A modern, delicious implementation of the Nix package manager, focused on correctness, usability, and growth — and committed to doing right by its community
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Eelco Dolstra 0abb3ad537 Allow content-addressable paths to have references 
This adds a command 'nix make-content-addressable' that rewrites the
specified store paths into content-addressable paths. The advantage of
such paths is that 1) they can be imported without signatures; 2) they
can enable deduplication in cases where derivation changes do not
cause output changes (apart from store path hashes).

For example,

  $ nix make-content-addressable -r nixpkgs.cowsay
  rewrote '/nix/store/g1g31ah55xdia1jdqabv1imf6mcw0nb1-glibc-2.25-49' to '/nix/store/48jfj7bg78a8n4f2nhg269rgw1936vj4-glibc-2.25-49'
  ...
  rewrote '/nix/store/qbi6rzpk0bxjw8lw6azn2mc7ynnn455q-cowsay-3.03+dfsg1-16' to '/nix/store/iq6g2x4q62xp7y7493bibx0qn5w7xz67-cowsay-3.03+dfsg1-16'

We can then copy the resulting closure to another store without
signatures:

  $ nix copy --trusted-public-keys '' ---to ~/my-nix /nix/store/iq6g2x4q62xp7y7493bibx0qn5w7xz67-cowsay-3.03+dfsg1-16

In order to support self-references in content-addressable paths,
these paths are hashed "modulo" self-references, meaning that
self-references are zeroed out during hashing. Somewhat annoyingly,
this means that the NAR hash stored in the Nix database is no longer
necessarily equal to the output of "nix hash-path"; for
content-addressable paths, you need to pass the --modulo flag:

  $ nix path-info --json /nix/store/iq6g2x4q62xp7y7493bibx0qn5w7xz67-cowsay-3.03+dfsg1-16  | jq -r .[].narHash
  sha256:0ri611gdilz2c9rsibqhsipbfs9vwcqvs811a52i2bnkhv7w9mgw

  $ nix hash-path --type sha256 --base32 /nix/store/iq6g2x4q62xp7y7493bibx0qn5w7xz67-cowsay-3.03+dfsg1-16
  1ggznh07khq0hz6id09pqws3a8q9pn03ya3c03nwck1kwq8rclzs

  $ nix hash-path --type sha256 --base32 /nix/store/iq6g2x4q62xp7y7493bibx0qn5w7xz67-cowsay-3.03+dfsg1-16 --modulo iq6g2x4q62xp7y7493bibx0qn5w7xz67
  0ri611gdilz2c9rsibqhsipbfs9vwcqvs811a52i2bnkhv7w9mgw
2019-10-21 17:47:24 +02:00
.github Remove .github/FUNDING.yml 2019-07-23 15:21:23 +02:00
config update config/config.{sub,guess} 2018-08-13 20:00:17 +00:00
contrib function-trace: always show the trace 2019-09-18 23:23:21 +02:00
corepkgs nix-channel: Don't fetch binary-cache-url 2019-06-25 13:27:16 +02:00
doc/manual Merge pull request #2291 from Taneb/master 2019-10-17 12:53:42 +02:00
m4 autoconf: Fix C++17 detection not working on Ubuntu 16.04. 2019-07-03 04:32:25 +02:00
maintainers upload-release.pl: Fix sshfs call 2019-09-04 21:44:40 +02:00
misc Make nix-daemon.plist less fragile on macOS 2019-10-09 12:52:01 +01:00
mk mk: add support for passing LDFLAGS to libs and bins 2019-07-03 04:32:25 +02:00
perl autoconf: Allow overriding CFLAGS/CXXFLAGS from outside. 2019-07-03 04:32:25 +02:00
scripts Fix unset variable in installer 2019-10-19 13:26:06 +10:00
src Allow content-addressable paths to have references 2019-10-21 17:47:24 +02:00
tests Add experimental-features setting 2019-10-21 13:34:44 +02:00
.dir-locals.el Add .dir-locals.el for Emacs 2016-01-28 11:12:04 +01:00
.editorconfig Add .editorconfig 2017-06-05 22:57:28 +01:00
.gitignore Treat plain derivation paths in context as normal paths. 2019-01-13 11:29:55 -05:00
.travis.yml Test the installer 2017-07-14 12:11:04 -04:00
.version Bump version 2019-09-04 15:59:33 +02:00
bootstrap.sh bootstrap: Simplify & make more robust. 2011-09-06 12:11:05 +00:00
configure.ac Use more robust test for libatomics 2019-10-01 21:22:18 -04:00
COPYING * Change this to LGPL to keep the government happy. 2006-04-25 16:41:06 +00:00
local.mk Merge all nix-* binaries into nix 2018-10-26 12:54:00 +02:00
Makefile autoconf: Allow overriding CFLAGS/CXXFLAGS from outside. 2019-07-03 04:32:25 +02:00
Makefile.config.in Get BOOST_LDFLAGS from autoconf, fix Ubuntu 16.04 build. 2019-07-03 04:32:25 +02:00
nix.spec.in Remove world-writability from per-user directories 2019-10-09 23:34:48 +02:00
README.md Add Open Collective 2019-07-18 10:57:26 +02:00
release-common.nix release-common: fix build with config.allowAliases = false 2019-05-30 18:08:33 +03:00
release.nix Fix macOS build 2019-08-28 22:04:45 +02:00
shell.nix fetchGit -> fetchTarball 2019-05-17 22:28:03 +02:00

README.md

Open Collective supporters

Nix, the purely functional package manager

Nix is a new take on package management that is fairly unique. Because of its purity aspects, a lot of issues found in traditional package managers don't appear with Nix.

To find out more about the tool, usage and installation instructions, please read the manual, which is available on the Nix website at http://nixos.org/nix/manual.

Contributing

Take a look at the Hacking Section of the manual. It helps you to get started with building Nix from source.

License

Nix is released under the LGPL v2.1

This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit.