Commit graph

15 commits

Author SHA1 Message Date
Eelco Dolstra
f83acbbfe3
Don't store fragment in FlakeRef 2020-02-02 16:33:19 +01:00
Eelco Dolstra
958ec5de56
Cleanup 2020-02-02 11:31:58 +01:00
Eelco Dolstra
8414685c0f Change lock file format to use an attribute representation of flake refs rather than URLs 2020-01-31 19:16:40 +01:00
Eelco Dolstra
c39c2503f7 Remove debug message 2020-01-27 14:28:57 +01:00
Eelco Dolstra
cc22cf662b Respect lock files of inputs + fine-grained lock file control
When computing a lock file, we now respect the lock files of flake
inputs. This is important for usability / reproducibility. For
example, the 'nixops' flake depends on the 'nixops-aws' and
'nixops-hetzner' repositories. So when the 'nixops' flake is used in
another flake, we want the versions of 'nixops-aws' and
'nixops-hetzner' locked by the the 'nixops' flake because those
presumably have been tested.

This can lead to a proliferation of versions of flakes like 'nixpkgs'
(since every flake's lock file could depend on a different version of
'nixpkgs'). This is not a major issue when using Nixpkgs overlays or
NixOS modules, since then the top-level flake composes those
overlays/modules into *its* version of Nixpkgs and all other versions
are ignored. Lock file computation has been made a bit more lazy so it
won't try to fetch all those versions of 'nixpkgs'.

However, in case it's necessary to minimize flake versions, there now
are two input attributes that allow this. First, you can copy an input
from another flake, as follows:

  inputs.nixpkgs.follows = "dwarffs/nixpkgs";

This states that the calling flake's 'nixpkgs' input shall be the same
as the 'nixpkgs' input of the 'dwarffs' input.

Second, you can override inputs of inputs:

  inputs.nixpkgs.url = github:edolstra/nixpkgs/<hash>;
  inputs.nixops.inputs.nixpkgs.url = github:edolstra/nixpkgs/<hash>;

or equivalently, using 'follows':

  inputs.nixpkgs.url = github:edolstra/nixpkgs/<hash>;
  inputs.nixops.inputs.nixpkgs.follows = "nixpkgs";

This states that the 'nixpkgs' input of the 'nixops' input shall be
the same as the calling flake's 'nixpkgs' input.

Finally, at '-v' Nix now prints the changes to the lock file, e.g.

  $ nix flake update ~/Misc/eelco-configurations/hagbard
  inputs of flake 'git+file:///home/eelco/Misc/eelco-configurations?subdir=hagbard' changed:
    updated 'nixpkgs': 'github:edolstra/nixpkgs/7845bf5f4b3013df1cf036e9c9c3a55a30331db9' -> 'github:edolstra/nixpkgs/03f3def66a104a221aac8b751eeb7075374848fd'
    removed 'nixops'
    removed 'nixops/nixops-aws'
    removed 'nixops/nixops-hetzner'
    removed 'nixops/nixpkgs'
2020-01-24 22:05:11 +01:00
Eelco Dolstra
cd973fa07f Give a better error message when a flake path is not a directory 2020-01-24 13:01:34 +01:00
Eelco Dolstra
9f4d8c6170 Pluggable fetchers
Flakes are now fetched using an extensible mechanism. Also lots of
other flake cleanups.
2020-01-21 22:56:04 +01:00
Eelco Dolstra
ecb3a1afa2 Merge remote-tracking branch 'origin/master' into flakes 2019-12-11 14:53:30 +01:00
Eelco Dolstra
15b888c9a5
cmatch -> smatch 2019-09-27 15:31:09 +02:00
Eelco Dolstra
5961c94097 Flake alias -> id 2019-09-20 14:46:37 +02:00
Eelco Dolstra
aeb7148afd
Some effort to minimize flake dependencies
For example, if the top-level flake depends on
"nixpkgs/release-19.03", and one of its dependencies depends on
"nixpkgs", then the latter will be mapped to "nixpkgs/release-19.03",
rather than whatever the default branch of "nixpkgs" is. Thus you get
only one "nixpkgs" dependency rather than two.

This currently only works in a breadth-first way, so the other way
around (i.e. if the top-level flake depends on "nixpkgs", and a
dependency depends on "nixpkgs/release-19.03") still results in two
"nixpkgs" dependencies.
2019-09-18 23:59:45 +02:00
Eelco Dolstra
2fa7f2a56a
Use git+ prefix in flake URI schemes
Fixes #3045.
2019-09-05 17:15:09 +02:00
Eelco Dolstra
61fdb16aac
Improve error message when a directory is not a flake
So you now get

  $ nix build
  error: path '.' is not a flake (because it does not reference a Git repository)

rather than

  $ nix build
  error: unsupported argument '.'
2019-09-02 17:35:35 +02:00
Eelco Dolstra
d132d057a8
Handle store symlinks in flake directories
E.g. 'nix path-info ./result' inside a flake directory now works
again.
2019-06-21 15:29:05 +02:00
Eelco Dolstra
54aff8430c
Move flake-related stuff to src/libexpr/flake 2019-06-05 16:51:54 +02:00
Renamed from src/libexpr/primops/flakeref.cc (Browse further)