45 lines
948 B
Nix
45 lines
948 B
Nix
{ lib, pkgs, ... }:
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let
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preSwitchCheckScript =
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set:
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lib.concatLines (
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lib.mapAttrsToList (name: text: ''
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# pre-switch check ${name}
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(
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${text}
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)
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if [[ $? != 0 ]]; then
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echo "Pre-switch check '${name}' failed"
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exit 1
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fi
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'') set
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);
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in
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{
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options.system.preSwitchChecks = lib.mkOption {
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default = { };
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example = lib.literalExpression ''
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{ failsEveryTime =
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'''
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false
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''';
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}
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'';
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description = ''
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A set of shell script fragments that are executed before the switch to a
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new NixOS system configuration. A failure in any of these fragments will
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cause the switch to fail and exit early.
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'';
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type = lib.types.attrsOf lib.types.str;
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apply =
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set:
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set
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// {
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script = pkgs.writeShellScript "pre-switch-checks" (preSwitchCheckScript set);
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};
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};
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}
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