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12 commits

Author SHA1 Message Date
Eelco Dolstra 87873d0d65 Merge remote-tracking branch 'origin/master' into flakes 2019-12-18 14:25:25 +01:00
Eelco Dolstra f8abbdd456 Add priority setting to stores 
This allows overriding the priority of substituters, e.g.

  $ nix-store --store ~/my-nix/ -r /nix/store/df3m4da96d84ljzxx4mygfshm1p0r2n3-geeqie-1.4 \
    --substituters 'http://cache.nixos.org?priority=100 daemon?priority=10'

Fixes #3264.
 2019-12-17 17:17:53 +01:00
Eelco Dolstra c32bba7489
Shut up some warnings 2019-09-24 17:28:18 +02:00
Eelco Dolstra 6644b6099b
Add flake evaluation cache 
This exploits the hermetic nature of flake evaluation to speed up
repeated evaluations of a flake output attribute.

For example (doing 'nix build' on an already present package):

  $ time nix build nixpkgs:firefox

  real    0m1.497s
  user    0m1.160s
  sys     0m0.139s

  $ time nix build nixpkgs:firefox

  real    0m0.052s
  user    0m0.038s
  sys     0m0.007s

The cache is ~/.cache/nix/eval-cache-v1.sqlite, which has entries like

  INSERT INTO Attributes VALUES(
    X'92a907d4efe933af2a46959b082cdff176aa5bfeb47a98fabd234809a67ab195',
    'packages.firefox',
    1,
    '/nix/store/pbalzf8x19hckr8cwdv62rd6g0lqgc38-firefox-67.0.drv /nix/store/g6q0gx0v6xvdnizp8lrcw7c4gdkzana0-firefox-67.0 out');

where the hash 92a9... is a fingerprint over the flake store path and
the contents of the lockfile. Because flakes are evaluated in pure
mode, this uniquely identifies the evaluation result.
 2019-06-07 22:25:48 +02:00
Eelco Dolstra ca14b14200
Use boost::format from the boost package 
Note that this only requires headers from boost so it doesn't add a
runtime dependency.

Also, use Nixpkgs 18.03.
 2018-03-14 19:24:04 +01:00
Eelco Dolstra fd86dd93dd
Improve SQLite busy handling 2017-02-28 13:59:11 +01:00
Eelco Dolstra cb1951e746
Periodically purge binary-cache.sqlite 2017-01-27 15:19:33 +01:00
Eelco Dolstra f294623d1d SQLite:: Add some convenience 2016-08-10 18:05:35 +02:00
Eelco Dolstra 451ebf24ce Cache path info lookups in SQLite 
This re-implements the binary cache database in C++, allowing it to be
used by other Store backends, in particular the S3 backend.
 2016-04-20 14:12:38 +02:00
Eelco Dolstra 80da7a6375 Probably fix SQLITE_BUSY errors 2016-04-05 15:29:56 +02:00
Eelco Dolstra 3d119f0a3b Improve the SQLite wrapper API 
In particular, this eliminates a bunch of boilerplate code.
 2016-03-30 15:50:45 +02:00
Eelco Dolstra d9c5e3bbf0 Factour out SQLite handling 2016-03-30 13:27:25 +02:00