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Add eval-system option

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`eval-system` option overrides just the value of `builtins.currentSystem`.
This is more useful than overriding `system` since you can build these
derivations on remote builders which can work on the given system.

Co-authored-by: John Ericson <John.Ericson@Obsidian.Systems>
Co-authored-by: Valentin Gagarin <valentin.gagarin@tweag.io>
This commit is contained in:
Matthew Bauer 2020-09-29 15:33:47 -04:00 • committed by John Ericson
parent fc0accf3dc
commit bcbdb09ccf
5 changed files with 40 additions and 6 deletions
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6
src/libstore/globals.hh
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@ -214,7 +214,11 @@ public:
In general, you do not have to modify this setting.
While you can force Nix to run a Darwin-specific `builder` executable on a Linux machine, the result would obviously be wrong.
This value is available in the Nix language as [`builtins.currentSystem`](@docroot@/language/builtin-constants.md#builtins-currentSystem).
This value is available in the Nix language as
[`builtins.currentSystem`](@docroot@/language/builtin-constants.md#builtins-currentSystem)
if the
[`eval-system`](#conf-eval-system)
configuration option is set as the empty string.
)"};
Setting<time_t> maxSilentTime{