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nixos/boot: some documentation improvements

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- Give a more accurate description of how fileSystems.<name/>.neededForBoot
  works

- Give a more detailed description of how fileSystems.<name/>.encrypted.keyFile
  works
This commit is contained in:
Keshav Kini 2020-07-26 17:05:21 -07:00
parent ea1287110f
commit 5e86bba082
3 changed files with 26 additions and 11 deletions
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8
nixos/lib/utils.nix
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@ -2,9 +2,11 @@ pkgs: with pkgs.lib;
rec {
# Check whenever fileSystem is needed for boot
fsNeededForBoot = fs: fs.neededForBoot
|| elem fs.mountPoint [ "/" "/nix" "/nix/store" "/var" "/var/log" "/var/lib" "/etc" ];
# Check whenever fileSystem is needed for boot. NOTE: Make sure
# pathsNeededForBoot is closed under the parent relationship, i.e. if /a/b/c
# is in the list, put /a and /a/b in as well.
pathsNeededForBoot = [ "/" "/nix" "/nix/store" "/var" "/var/log" "/var/lib" "/etc" ];
fsNeededForBoot = fs: fs.neededForBoot || elem fs.mountPoint pathsNeededForBoot;
# Check whenever `b` depends on `a` as a fileSystem
fsBefore = a: b: a.mountPoint == b.device