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Add inNixShell = true to nix-shell auto-call

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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
This commit is contained in:
Robert Hensing 2019-10-27 09:34:33 +01:00
parent 2f96a89646
commit 9d612c393a
3 changed files with 21 additions and 6 deletions
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3
tests/shell.nix
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@ -1,4 +1,4 @@
{ }:
{ inNixShell ? false }:
with import ./config.nix;
@ -22,6 +22,7 @@ let pkgs = rec {
name = "shellDrv";
builder = "/does/not/exist";
VAR_FROM_NIX = "bar";
TEST_inNixShell = if inNixShell then "true" else "false";
inherit stdenv;
};