nixpkgs/system/activate-configuration.nix
Nicolas Pierron 1c66b3e0c0 Fix activation script's merge function.
svn path=/nixos/branches/fix-style/; revision=14199
2009-02-22 23:33:58 +00:00

57 lines
1.4 KiB
Nix

# generate the script used to activate the configuration.
{pkgs, config, ...}:
let
inherit (pkgs.stringsWithDeps) textClosureOverridable noDepEntry;
inherit (pkgs.lib) mkOption mergeTypedOption mergeAttrs mapRecordFlatten
mapAttrs addErrorContext fold;
textClosure = steps:
textClosureOverridable steps (
[(noDepEntry "#!/bin/sh")]
++ (mapRecordFlatten (a: v: v) steps)
);
aggregateScripts = name: steps:
pkgs.writeScript name (textClosure steps);
addAttributeName = mapAttrs (a: v: {
text = ''
#### ${a} begin
${v.text}
#### ${a} end
'';
inherit (v) deps;
});
in
{
system = {
activationScripts = mkOption {
default = [];
example = {
stdio = {
text = "
# Needed by some programs.
ln -sfn /proc/self/fd /dev/fd
ln -sfn /proc/self/fd/0 /dev/stdin
ln -sfn /proc/self/fd/1 /dev/stdout
ln -sfn /proc/self/fd/2 /dev/stderr
";
deps = [];
};
};
description = ''
Activate the new configuration (i.e., update /etc, make accounts,
and so on).
'';
merge = mergeTypedOption "script" builtins.isAttrs (fold mergeAttrs {});
apply = set:
let lib = addAttributeName set; in {
inherit lib; # used to fetch dependencies.
script = aggregateScripts "activationScript" lib;
};
};
};
}