home-manager/modules/programs/mu.nix

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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.programs.mu;
# Used to generate command line arguments that mu can operate with.
genCmdMaildir = path: "--maildir=" + path;
# Takes the list of accounts with mu.enable = true, and generates a
# command-line flag for initializing the mu database.
myAddresses = let
# List of account sets where mu.enable = true.
muAccounts =
filter (a: a.mu.enable) (attrValues config.accounts.email.accounts);
addrs = map (a: a.address) muAccounts;
# Prefix --my-address= to each account's address with mu.enable.
addMyAddress = map (addr: "--my-address=" + addr) addrs;
in concatStringsSep " " addMyAddress;
in {
meta.maintainers = [ maintainers.KarlJoad ];
options = {
programs.mu = {
enable = mkEnableOption "mu, a maildir indexer and searcher";
# No options/config file present for mu, and program author will not be
# adding one soon. See https://github.com/djcb/mu/issues/882 for more
# information about this.
};
accounts.email.accounts = mkOption {
type = with types;
attrsOf
(submodule { options.mu.enable = mkEnableOption "mu indexing"; });
};
};
config = mkIf cfg.enable {
home.packages = [ pkgs.mu ];
home.activation.runMuInit = let
maildirOption = genCmdMaildir config.accounts.email.maildirBasePath;
dbLocation = config.xdg.cacheHome + "/mu";
in hm.dag.entryAfter [ "writeBoundary" ] ''
# If the database directory exists, then `mu init` should NOT be run.
# In theory, mu is the only thing that creates that directory, and it is
# only created during the initial index.
if [[ ! -d "${dbLocation}" ]]; then
$DRY_RUN_CMD mu init ${maildirOption} ${myAddresses} $VERBOSE_ARG;
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fi
'';
};
}