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home-environment: optionally empty PATH in activation

This adds the option `home.emptyActivationPath` that, when enabled,
will cause the activation script to ignore the calling user's `PATH`.
The option is disabled by default to match current behavior but the
intent is to change this in the future to reduce risk of accidental
dependencies of the environment.
This commit is contained in:
Robert Helgesson 2017-12-11 17:03:34 +01:00
parent 2ff09158f3
commit 28e00b68fd
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@ -169,6 +169,17 @@ in
description = "The derivation installing the user packages.";
};
home.emptyActivationPath = mkOption {
internal = true;
default = false;
type = types.bool;
description = ''
Whether the activation script should start with an empty
<envvar>PATH</envvar> variable. When <literal>false</literal>
then the user's <envvar>PATH</envvar> will be used.
'';
};
home.activation = mkOption {
internal = true;
default = {};
@ -263,7 +274,8 @@ in
pkgs.gnused
pkgs.ncurses # For `tput`.
pkgs.nix
];
]
+ optionalString (!cfg.emptyActivationPath) "\${PATH:+:}$PATH";
activationScript = pkgs.writeScript "activation-script" ''
#!${pkgs.stdenv.shell}
@ -271,7 +283,7 @@ in
set -eu
set -o pipefail
export PATH="${activationBinPaths}:$PATH"
export PATH="${activationBinPaths}"
. ${./lib-bash/color-echo.sh}