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home-manager/modules/programs/mbsync.nix
2022-04-07 22:36:13 -06:00

297 lines
11 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.programs.mbsync;
# Accounts for which mbsync is enabled.
mbsyncAccounts =
filter (a: a.mbsync.enable) (attrValues config.accounts.email.accounts);
# Given a SINGLE group's channels attribute set, return true if ANY of the channel's
# patterns use the invalidOption attribute set value name.
channelInvalidOption = channels: invalidOption:
any (c: c) (mapAttrsToList (c: hasAttr invalidOption) channels);
# Given a SINGLE account's groups attribute set, return true if ANY of the account's group's channel's patterns use the invalidOption attribute set value name.
groupInvalidOption = groups: invalidOption:
any (g: g) (mapAttrsToList (groupName: groupVals:
channelInvalidOption groupVals.channels invalidOption) groups);
# Given all accounts (ensure that accounts passed in here ARE mbsync-using accounts)
# return true if ANY of the account's groups' channels' patterns use the
# invalidOption attribute set value name.
accountInvalidOption = accounts: invalidOption:
any (a: a)
(map (account: groupInvalidOption account.mbsync.groups invalidOption)
mbsyncAccounts);
genTlsConfig = tls:
{
SSLType = if !tls.enable then
"None"
else if tls.useStartTls then
"STARTTLS"
else
"IMAPS";
} // optionalAttrs (tls.enable && tls.certificatesFile != null) {
CertificateFile = toString tls.certificatesFile;
};
imports = [
(mkRenamedOptionModule [ "programs" "mbsync" "masterSlaveMapping" ] [
"programs"
"mbsync"
"nearFarMapping"
])
];
nearFarMapping = {
none = "None";
imap = "Far";
maildir = "Near";
both = "Both";
};
genSection = header: entries:
let
escapeValue = escape [ ''"'' ];
hasSpace = v: builtins.match ".* .*" v != null;
genValue = n: v:
if isList v then
concatMapStringsSep " " (genValue n) v
else if isBool v then
lib.hm.booleans.yesNo v
else if isInt v then
toString v
else if isString v && hasSpace v then
''"${escapeValue v}"''
else if isString v then
v
else
let prettyV = lib.generators.toPretty { } v;
in throw "mbsync: unexpected value for option ${n}: '${prettyV}'";
in ''
${header}
${concatStringsSep "\n"
(mapAttrsToList (n: v: "${n} ${genValue n v}") entries)}
'';
genAccountConfig = account:
with account;
genSection "IMAPAccount ${name}" ({
Host = imap.host;
User = userName;
PassCmd = toString passwordCommand;
} // genTlsConfig imap.tls
// optionalAttrs (imap.port != null) { Port = toString imap.port; }
// mbsync.extraConfig.account) + "\n"
+ genSection "IMAPStore ${name}-remote"
({ Account = name; } // mbsync.extraConfig.remote) + "\n"
+ genSection "MaildirStore ${name}-local" ({
Inbox = "${maildir.absPath}/${folders.inbox}";
} // optionalAttrs
(mbsync.subFolders != "Maildir++" || mbsync.flatten != null) {
Path = "${maildir.absPath}/";
} // optionalAttrs (mbsync.flatten == null) {
SubFolders = mbsync.subFolders;
} // optionalAttrs (mbsync.flatten != null) { Flatten = mbsync.flatten; }
// mbsync.extraConfig.local) + "\n" + genChannels account;
genChannels = account:
with account;
if mbsync.groups == { } then
genAccountWideChannel account
else
genGroupChannelConfig name mbsync.groups + "\n"
+ genAccountGroups mbsync.groups;
# Used when no channels are specified for this account. This will create a
# single channel for the entire account that is then further refined within
# the Group for synchronization.
genAccountWideChannel = account:
with account;
genSection "Channel ${name}" ({
Far = ":${name}-remote:";
Near = ":${name}-local:";
Patterns = mbsync.patterns;
Create = nearFarMapping.${mbsync.create};
Remove = nearFarMapping.${mbsync.remove};
Expunge = nearFarMapping.${mbsync.expunge};
SyncState = "*";
} // mbsync.extraConfig.channel) + "\n";
# Given the attr set of groups, return a string of channels that will direct
# mail to the proper directories, according to the pattern used in channel's
# "far" pattern definition.
genGroupChannelConfig = storeName: groups:
let
# Given the name of the group this channel is part of and the channel
# itself, generate the string for the desired configuration.
genChannelString = groupName: channel:
let
escapeValue = escape [ ''\"'' ];
hasSpace = v: builtins.match ".* .*" v != null;
# Given a list of patterns, will return the string requested.
# Only prints if the pattern is NOT the empty list, the default.
genChannelPatterns = patterns:
if (length patterns) != 0 then
"Pattern " + concatStringsSep " "
(map (pat: if hasSpace pat then escapeValue pat else pat)
patterns) + "\n"
else
"";
in genSection "Channel ${groupName}-${channel.name}" ({
Far = ":${storeName}-remote:${channel.farPattern}";
Near = ":${storeName}-local:${channel.nearPattern}";
} // channel.extraConfig) + genChannelPatterns channel.patterns;
# Given the group name, and a attr set of channels within that group,
# Generate a list of strings for each channels' configuration.
genChannelStrings = groupName: channels:
optionals (channels != { })
(mapAttrsToList (channelName: info: genChannelString groupName info)
channels);
# Given a group, return a string that configures all the channels within
# the group.
genGroupsChannels = group:
concatStringsSep "\n" (genChannelStrings group.name group.channels);
# Generate all channel configurations for all groups for this account.
in concatStringsSep "\n"
(remove "" (mapAttrsToList (name: group: genGroupsChannels group) groups));
# Given the attr set of groups, return a string which maps channels to groups
genAccountGroups = groups:
let
# Given the name of the group and the attribute set of channels, make
# make "Channel <grpName>-<chnName>" for each channel to list os strings
genChannelStrings = groupName: channels:
mapAttrsToList (name: info: "Channel ${groupName}-${name}") channels;
# Take in 1 group, if the group has channels specified, construct the
# "Group <grpName>" header and each of the channels.
genGroupChannelString = group:
flatten (optionals (group.channels != { }) ([ "Group ${group.name}" ]
++ (genChannelStrings group.name group.channels)));
# Given set of groups, generates list of strings, where each string is one
# of the groups and its consituent channels.
genGroupsStrings = mapAttrsToList (name: info:
concatStringsSep "\n" (genGroupChannelString groups.${name})) groups;
# Join all non-empty groups.
combined = concatStringsSep "\n\n" (remove "" genGroupsStrings) + "\n";
in combined;
genGroupConfig = name: channels:
let
genGroupChannel = n: boxes: "Channel ${n}:${concatStringsSep "," boxes}";
in "\n" + concatStringsSep "\n"
([ "Group ${name}" ] ++ mapAttrsToList genGroupChannel channels);
in {
meta.maintainers = [ maintainers.KarlJoad ];
options = {
programs.mbsync = {
enable = mkEnableOption "mbsync IMAP4 and Maildir mailbox synchronizer";
package = mkOption {
type = types.package;
default = pkgs.isync;
defaultText = literalExpression "pkgs.isync";
example = literalExpression "pkgs.isync";
description = "The package to use for the mbsync binary.";
};
groups = mkOption {
type = types.attrsOf (types.attrsOf (types.listOf types.str));
default = { };
example = literalExpression ''
{
inboxes = {
account1 = [ "Inbox" ];
account2 = [ "Inbox" ];
};
}
'';
description = ''
Definition of groups.
'';
};
extraConfig = mkOption {
type = types.lines;
default = "";
description = ''
Extra configuration lines to add to the mbsync configuration.
'';
};
};
accounts.email.accounts = mkOption {
type = with types; attrsOf (submodule (import ./mbsync-accounts.nix));
};
};
config = mkIf cfg.enable (mkMerge [
{
assertions = let
checkAccounts = pred: msg:
let badAccounts = filter pred mbsyncAccounts;
in {
assertion = badAccounts == [ ];
message = "mbsync: ${msg} for accounts: "
+ concatMapStringsSep ", " (a: a.name) badAccounts;
};
in [
(checkAccounts (a: a.maildir == null) "Missing maildir configuration")
(checkAccounts (a: a.imap == null) "Missing IMAP configuration")
(checkAccounts (a: a.passwordCommand == null) "Missing passwordCommand")
(checkAccounts (a: a.userName == null) "Missing username")
];
}
(mkIf (accountInvalidOption mbsyncAccounts "masterPattern") {
warnings = [
"mbsync channels no longer use masterPattern. Use farPattern in its place."
];
})
(mkIf (accountInvalidOption mbsyncAccounts "slavePattern") {
warnings = [
"mbsync channels no longer use slavePattern. Use nearPattern in its place."
];
})
{
home.packages = [ cfg.package ];
programs.notmuch.new.ignore = [ ".uidvalidity" ".mbsyncstate" ];
home.file.".mbsyncrc".text = let
accountsConfig = map genAccountConfig mbsyncAccounts;
# Only generate this kind of Group configuration if there are ANY accounts
# that do NOT have a per-account groups/channels option(s) specified.
groupsConfig =
if any (account: account.mbsync.groups == { }) mbsyncAccounts then
mapAttrsToList genGroupConfig cfg.groups
else
[ ];
in ''
# Generated by Home Manager.
''
+ concatStringsSep "\n" (optional (cfg.extraConfig != "") cfg.extraConfig)
+ concatStringsSep "\n\n" accountsConfig
+ concatStringsSep "\n" groupsConfig;
home.activation = mkIf (mbsyncAccounts != [ ]) {
createMaildir =
hm.dag.entryBetween [ "linkGeneration" ] [ "writeBoundary" ] ''
$DRY_RUN_CMD mkdir -m700 -p $VERBOSE_ARG ${
concatMapStringsSep " " (a: a.maildir.absPath) mbsyncAccounts
}
'';
};
}
]);
}