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Author SHA1 Message Date
Eelco Dolstra d4dcffd643
Add pure evaluation mode
In this mode, the following restrictions apply:

* The builtins currentTime, currentSystem and storePath throw an
  error.

* $NIX_PATH and -I are ignored.

* fetchGit and fetchMercurial require a revision hash.

* fetchurl and fetchTarball require a sha256 attribute.

* No file system access is allowed outside of the paths returned by
  fetch{Git,Mercurial,url,Tarball}. Thus 'nix build -f ./foo.nix' is
  not allowed.

Thus, the evaluation result is completely reproducible from the
command line arguments. E.g.

  nix build --pure-eval '(
    let
      nix = fetchGit { url = https://github.com/NixOS/nixpkgs.git; rev = "9c927de4b179a6dd210dd88d34bda8af4b575680"; };
      nixpkgs = fetchGit { url = https://github.com/NixOS/nixpkgs.git; ref = "release-17.09"; rev = "66b4de79e3841530e6d9c6baf98702aa1f7124e4"; };
    in (import (nix + "/release.nix") { inherit nix nixpkgs; }).build.x86_64-linux
  )'

The goal is to enable completely reproducible and traceable
evaluation. For example, a NixOS configuration could be fully
described by a single Git commit hash. 'nixos-rebuild' would do
something like

  nix build --pure-eval '(
    (import (fetchGit { url = file:///my-nixos-config; rev = "..."; })).system
  ')

where the Git repository /my-nixos-config would use further fetchGit
calls or Git externals to fetch Nixpkgs and whatever other
dependencies it has. Either way, the commit hash would uniquely
identify the NixOS configuration and allow it to reproduced.
2018-01-16 19:23:18 +01:00
Eelco Dolstra fd10f6f241
Show when tests are skipped
Also, don't depend on tput (ncurses). It's really not needed since
ANSI escape sequences have been standardized for 35 years or so.
2017-11-07 12:09:57 +01:00
Eelco Dolstra 838509d1a0
Whitespace 2017-10-09 15:41:09 +02:00
Jörg Thalheim e94fc238cf fixing bashisms in test code
This fixed the build on ubuntu/debian, where dash is the sh.
2017-10-06 06:12:33 -05:00
Dan Peebles 60ecbd7934 More elegant test output
I got sick of trying to find the failures in the sea of debug output, so
we now:
- Hide test output unless it fails
- Sprinkle in some simple color
- Pad results for a more tabular look

If Nix is getting a more friendly user interface, we might as well get
a friendlier developer interface, right? :)
2017-10-03 00:59:32 -04:00
Eelco Dolstra 215b70f51e
Revert "Get rid of unicode quotes ()"
This reverts commit f78126bfd6. There
really is no need for such a massive change...
2016-11-26 00:38:01 +01:00
Guillaume Maudoux f78126bfd6 Get rid of unicode quotes () 2016-11-25 15:48:27 +01:00
Eelco Dolstra 764d90597a Merge commit 'a210c995cdd9279ed4137ec5d2e4cc928cb36097' 2014-02-07 16:27:34 +01:00
Eelco Dolstra 4ee6001f95 GNU Make 3.81 compatibility
3.81 doesn't understand the ‘define foo =’ syntax, which was added in
3.82.  So use ‘define foo’ instead.
2014-02-04 11:21:13 +01:00
Eelco Dolstra b6465ae5d3 Merge commit '28dc4883356a50f2805a3e3c819a541c44a4ff0a' into make 2014-02-01 15:37:59 +01:00
Eelco Dolstra 74ca70da3a Add 'mk/' from commit '1eff3ad37fdb9dcf9f8528fdacea0ebf0e79d545'
git-subtree-dir: mk
git-subtree-mainline: 6ef32bddc1
git-subtree-split: 1eff3ad37f
2014-02-01 14:38:28 +01:00
Eelco Dolstra 568b1b0a8a Remove mk subdirectory in preparation for "git subtree" 2014-01-09 16:15:16 +01:00
Eelco Dolstra 55c9a40613 Move stuff to top-level
This makes it easier to use with "git subtree".
2014-01-09 16:12:02 +01:00
Eelco Dolstra 49a385096e Initial commit (imported from the Nix repo) 2013-12-10 15:54:34 +01:00
Eelco Dolstra bf8b66adcf Add missing file 2013-12-04 13:41:32 -05:00