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|
{
lib,
config,
nixosConfig,
sysLib,
pkgs,
...
}: let
unisonPath = "${config.xdg.dataHome}/unison";
# These are only used for the script
unisonOptions = {
sshcmd = "ssh";
ui = "text";
auto = "true";
};
paths_to_keep = [
"~/.local/state/mpv"
"~/.local/state/nvim"
"~/.local/share"
"~/.local/.Trash-1000"
"~/.mozilla/.Trash-1000"
"~/.mozilla/firefox"
"~/media"
"~/school"
"~/repos"
];
hostName = let
hn = nixosConfig.networking.hostName;
in
if hn == "tiamat"
then "apzu"
else if hn == "apzu"
then "tiamat"
else builtins.throw "Host (${hn}) not yet covered in the unison host mapping.";
mkPath = path:
if lib.strings.hasPrefix "~" path
then "${builtins.elemAt (builtins.attrNames config.home.persistence)
0}${lib.strings.removePrefix "~" path}"
else
builtins.throw
"Every pathname needs to start with a '~'";
mkPair = pathname: let
path = mkPath pathname;
in {
name = "${pathname}";
value = {
stateDirectory = unisonPath;
roots = [
"${path}"
"ssh://${config.home.username}@${hostName}.fritz.box/${path}"
];
};
};
serialiseArg = key: val:
lib.strings.concatStringsSep " "
(lib.forEach (lib.toList val) (x: lib.strings.escapeShellArg "-${key}=${lib.escape ["="] x}"));
serialiseArgs = args: lib.strings.concatStringsSep " " (lib.mapAttrsToList serialiseArg args);
esa = a: lib.strings.escapeShellArg a;
mkScriptLine = pathname: let
path =
mkPath pathname;
in
lib.strings.concatStringsSep " " [
"unison"
"${serialiseArgs unisonOptions}"
"${esa path}"
(esa "ssh://${config.home.username}@${hostName}.fritz.box/${path}")
];
script = lib.strings.concatStringsSep "\n" (builtins.map mkScriptLine paths_to_keep);
pairs = builtins.listToAttrs (builtins.map mkPair paths_to_keep);
in {
home.packages = [
(sysLib.writeShellScript {
name = "unison-backup";
src = builtins.toFile "unison-backup" (''
#!/usr/bin/env sh
export UNISON=${esa unisonPath};
''
+ script);
dependencies = with pkgs; [unison openssh];
})
];
services.unison = {
enable = false;
inherit pairs;
};
}
|
