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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 49cd7387ad nix-push: create a manifest-less binary cache 
Manifests are a huge pain, since users need to run nix-pull directly
or indirectly to obtain them.  They tend to be large and lag behind
the available binaries; also, the downloaded manifests in
/nix/var/nix/manifest need to be in sync with the Nixpkgs sources.  So
we want to get rid of them.

The idea of manifest-free operation works as follows.  Nix is
configured with a set of URIs of binary caches, e.g.

  http://nixos.org/binary-cache

Whenever Nix needs a store path X, it checks each binary cache for the
existence of a file <CACHE-URI>/<SHA-256 hash of X>.narinfo, e.g.

  http://nixos.org/binary-cache/bi1gh9...ia17.narinfo

The .narinfo file contains the necessary information about the store
path that was formerly kept in the manifest, i.e., (relative) URI of
the compressed NAR, references, size, hash, etc.  For example:

  StorePath: /nix/store/xqp4l88cr9bxv01jinkz861mnc9p7qfi-neon-0.29.6
  URL: 1bjxbg52l32wj8ww47sw9f4qz0r8n5vs71l93lcbgk2506v3cpfd.nar.bz2
  CompressedHash: sha256:1bjxbg52l32wj8ww47sw9f4qz0r8n5vs71l93lcbgk2506v3cpfd
  CompressedSize: 202542
  NarHash: sha256:1af26536781e6134ab84201b33408759fc59b36cc5530f57c0663f67b588e15f
  NarSize: 700440
  References: 043zrsanirjh8nbc5vqpjn93hhrf107f-bash-4.2-p24 cj7a81wsm1ijwwpkks3725661h3263p5-glibc-2.13 ...
  Deriver: 4idz1bgi58h3pazxr3akrw4fsr6zrf3r-neon-0.29.6.drv
  System: x86_64-linux

Nix then knows that it needs to download

  http://nixos.org/binary-cache/1bjxbg52l32wj8ww47sw9f4qz0r8n5vs71l93lcbgk2506v3cpfd.nar.bz2

to substitute the store path.

Note that the store directory is omitted from the References and
Deriver fields to save space, and that the URL can be relative to the
binary cache prefix.

This patch just makes nix-push create binary caches in this format.
The next step is to make a substituter that supports them.
2012-06-28 17:19:32 -04:00
corepkgs Disable building in chroot for Nix's corepkgs 2012-05-09 22:14:36 -04:00
doc Update release notes 2012-06-23 14:59:13 -04:00
misc fixes to nix-worker systemd service descriptor: - remove commented-out lines - register the file for distribution in Makefile.am 2012-05-31 08:59:36 -04:00
perl Support building with the Perl XS bindings disabled 2012-05-10 19:03:23 -04:00
scripts nix-push: create a manifest-less binary cache 2012-06-28 17:19:32 -04:00
src nix-store -r: do substitutions in parallel 2012-06-27 16:58:15 -04:00
tests Urgh, modified the wrong file... 2012-04-14 19:52:58 +02:00
.gitignore Drop the externals directory 2012-03-18 23:54:57 +01:00
AUTHORS * Put something in here. 2004-11-07 20:30:02 +00:00
bootstrap.sh bootstrap: Simplify & make more robust. 2011-09-06 12:11:05 +00:00
build.nix Add an experimental nix-make file 2012-05-21 09:43:01 -04:00
configure.ac Support building with the Perl XS bindings disabled 2012-05-10 19:03:23 -04:00
COPYING * Change this to LGPL to keep the government happy. 2006-04-25 16:41:06 +00:00
INSTALL * Autoconf / Automake configuration and building. 2003-04-04 16:14:56 +00:00
Makefile.am fixes to nix-worker systemd service descriptor: - remove commented-out lines - register the file for distribution in Makefile.am 2012-05-31 08:59:36 -04:00
nix.conf.example * Document --cores in the manual. 2010-08-17 07:22:05 +00:00
nix.spec.in On systems with SystemD, install the service descriptor for nix-worker, and enable and start it 2012-05-31 08:59:36 -04:00
README * Install documentation in $(docdir) (i.e. share/doc/nix). 2008-11-19 13:19:09 +00:00
release.nix Add Emacs to the disk image 2012-05-31 09:50:58 -04:00
substitute.mk Support building with the Perl XS bindings disabled 2012-05-10 19:03:23 -04:00
version Bump version number 2012-05-12 00:07:08 -04:00

README 

Nix is a purely functional package manager.  For installation and
usage instructions, please read the manual, which can be found in
`docs/manual/manual.html', and additionally at the Nix website at
<http://nixos.org/>.


Acknowledgments

This product includes software developed by the OpenSSL Project for
use in the OpenSSL Toolkit (http://www.OpenSSL.org/).