Commit graph

27 commits

Author SHA1 Message Date
Maximilian Bosch
e94aa1f647
tests/nix-shell: more meaningful testcase 2022-06-22 22:35:48 +02:00
Maximilian Bosch
98946e2d9c
nix-shell: restore backwards-compat with old nixpkgs
Basically an attempt to resume fixing #5543 for a breakage introduced
earlier[1]. Basically, when evaluating an older `nixpkgs` with
`nix-shell` the following error occurs:

    λ ma27 [~] → nix-shell -I nixpkgs=channel:nixos-18.03 -p nix
    error: anonymous function at /nix/store/zakqwc529rb6xcj8pwixjsxscvlx9fbi-source/pkgs/top-level/default.nix:20:1 called with unexpected argument 'inNixShell'

           at /nix/store/zakqwc529rb6xcj8pwixjsxscvlx9fbi-source/pkgs/top-level/impure.nix:82:1:

               81|
               82| import ./. (builtins.removeAttrs args [ "system" "platform" ] // {
                 | ^
               83|   inherit config overlays crossSystem;

This is a problem because one of the main selling points of Nix is that
you can evaluate any old Nix expression and still get the same result
(which also means that it *still evaluates*). In fact we're deprecating,
but not removing a lot of stuff for that reason such as unquoted URLs[2]
or `builtins.toPath`. However this property was essentially thrown away
here.

The change is rather simple: check if `inNixShell` is specified in the
formals of an auto-called function. This means that

    { inNixShell ? false }:
    builtins.trace inNixShell
      (with import <nixpkgs> { }; makeShell { name = "foo"; })

will show `trace: true` while

    args@{ ... }:
    builtins.trace args.inNixShell
      (with import <nixpkgs> { }; makeShell { name = "foo"; })

will throw the following error:

    error: attribute 'inNixShell' missing

This is explicitly needed because the function in
`pkgs/top-level/impure.nix` of e.g. NixOS 18.03 has an ellipsis[3], but
passes the attribute-set on to another lambda with formals that doesn't
have an ellipsis anymore (hence the error from above). This was perhaps
a mistake, but we can't fix it anymore. This also means that there's
AFAICS no proper way to check if the attr-set that's passed to the Nix
code via `EvalState::autoCallFunction` is eventually passed to a lambda
with formals where `inNixShell` is missing.

However, this fix comes with a certain price. Essentially every
`shell.nix` that assumes `inNixShell` to be passed to the formals even
without explicitly specifying it would break with this[4]. However I think
that this is ugly, but preferable:

* Nix 2.3 was declared stable by NixOS up until recently (well, it still
  is as long as 21.11 is alive), so most people might not have even
  noticed that feature.

* We're talking about a way shorter time-span with this change being
  in the wild, so the fallout should be smaller IMHO.

[1] 9d612c393a
[2] https://github.com/NixOS/rfcs/pull/45#issuecomment-488232537
[3] https://github.com/NixOS/nixpkgs/blob/release-18.03/pkgs/top-level/impure.nix#L75
[4] See e.g. the second expression in this commit-message or the changes
    for `tests/ca/nix-shell.sh`.
2022-06-13 23:29:28 +02:00
regnat
05081bedc1 Make nix-shell work when nixpkgs is content-addressed
Fix #5259
2021-11-26 09:56:48 +01:00
ldesgoui
6eeb6f9c84 nix-shell -p: pass --arg values as nixpkgs params 2021-07-31 17:25:10 +02:00
Eelco Dolstra
86fb01c4be nix print-dev-env: Add --json flag 2021-07-09 12:10:48 +02:00
Eelco Dolstra
e50408bd31 nix develop: Add a test for bash functions 2021-07-09 01:18:44 +02:00
Eelco Dolstra
9fc7da1e08 Add test for #4992 2021-07-09 01:18:44 +02:00
Eelco Dolstra
b1cfe8f984 nix develop: Add a test for arrays 2021-07-09 00:32:55 +02:00
regnat
2cf591a134 Make nix develop work with CA derivations
Fix #4823
2021-06-11 13:35:13 +02:00
regnat
56605b4688 Make nix-shell support content-addressed derivations
Resolve the derivation before trying to load its environment −
essentially reproducing what the build loop does − so that we can
effectively access our dependencies (and not just their placeholders).

Fix #4821
2021-06-11 13:32:49 +02:00
Lily Ballard
437189e446 Escape filename given to nix-shell in shebang mode
This prevents spaces or other metacharacters from causing nix-shell to
execute the wrong path.

Fixes #4229.
2020-11-24 15:08:37 -08:00
Sebastian Ullrich
3f24a417da Add test case for incidentally fixed #4228 2020-11-09 22:43:14 +01:00
Sebastian Ullrich
579b953231 Make test case more precise
Co-authored-by: Théophane Hufschmitt <regnat@users.noreply.github.com>
2020-11-09 22:43:14 +01:00
Sebastian Ullrich
fb7735e4cf nix develop: Preserve stdin with -c 2020-11-09 22:43:14 +01:00
Eelco Dolstra
00d25e8457
Remove the --indirect flag
All GC roots are now indirect.
2020-09-03 11:22:00 +02:00
Eelco Dolstra
017efae01f Hopefully fix macOS test failure 2020-07-03 13:16:22 +02:00
Eelco Dolstra
5596f879b4 Add test for nix develop 2020-07-02 18:32:45 +02:00
Robert Hensing
9d612c393a Add inNixShell = true to nix-shell auto-call
This is an alternative to the IN_NIX_SHELL environment variable,
allowing the expression to adapt itself to nix-shell without
triggering those adaptations when used as a dependency of another
shell.

Closes #3147
2019-10-27 13:16:02 +01:00
Eelco Dolstra
5064971ded
Fix test failures when $TMPDIR changes
(cherry picked from commit c38c726eb5)
2019-06-15 16:36:33 +02:00
Samuel Dionne-Riel
438e02529d Allows selectively adding environment variables to pure shells.
Includes documentation and test.
2018-08-02 08:21:30 -04:00
Samuel Dionne-Riel
a4c9b2595e Hardcodes nix-shell instead of /usr/bin/env nix-shell...
... in the ruby shebang test.
2018-04-09 09:36:54 -04:00
Samuel Dionne-Riel
9478f88681 Adds nix-shell test for special-cased ruby interpreter.
The test fakes the interpreter only to verify the arguments it would be
given.
2018-04-08 00:45:28 -04:00
Linus Heckemann
12913ccf45 nix-shell: allow symlinks to .drvs
This makes persistent shell environments easier to use.
2018-03-16 22:15:24 +00:00
Eelco Dolstra
90948a4e3a
nix-shell/nix-build: Support .drv files again
Fixes #1663.

Also handle '!<output-name>' (#1694).
2017-11-24 18:08:35 +01:00
Eelco Dolstra
89ffe1eff9
Fix nix-shell tests
The nix-shell fix in 668fef2e4f revealed
that we had some --pure tests that incorrectly depended on PATH from
config.nix's mkDerivation being overwritten by the caller's PATH.

http://hydra.nixos.org/build/49242478
2017-02-24 17:29:02 +01:00
Eelco Dolstra
c287e797a8
nix-shell: In #! mode, pass the last argument
"i < argc - 1" should be "i < argc".
2017-01-03 11:40:51 +01:00
Tuomas Tynkkynen
b501bea25f tests: Add simple tests for nix-shell
nix-shell -A, -p and -i are lightly tested.
2017-01-03 10:11:09 +02:00