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email: add module

This adds a general module infrastructure for configuring email
accounts. The intent is to specify high level information such as IMAP
and SMTP hostnames and login information so that more specific program
and service modules do not have to duplicate options for specifying
accounts.

It is allowed for modules to inject further options within this
namespace where relevant. For example, an MUA may wish add an option
to add per-account filter rules.

Co-authored-by: Matthieu Coudron <mattator@gmail.com>
This commit is contained in:
Robert Helgesson 2018-06-26 23:41:30 +02:00
parent 299e01722f
commit 34bb9b5766
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3 changed files with 342 additions and 0 deletions

323
modules/accounts/email.nix Normal file
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@ -0,0 +1,323 @@
{ config, lib, ... }:
with lib;
let
cfg = config.accounts.email;
tlsModule = types.submodule {
options = {
enable = mkOption {
type = types.bool;
default = true;
description = ''
Whether to enable TLS/SSL.
'';
};
useStartTls = mkOption {
type = types.bool;
default = false;
description = ''
Whether to use STARTTLS.
'';
};
certificatesFile = mkOption {
type = types.nullOr types.path;
default = null;
description = ''
Path to file containing certificate authorities that should
be used to validate the connection authenticity. If
<literal>null</literal> then the system default is used.
Note, if set then the system default may still be accepted.
'';
};
};
};
imapModule = types.submodule {
options = {
host = mkOption {
type = types.str;
example = "imap.example.org";
description = ''
Hostname of IMAP server.
'';
};
port = mkOption {
type = types.nullOr types.ints.positive;
default = null;
example = 993;
description = ''
The port on which the IMAP server listens. If
<literal>null</literal> then the default port is used.
'';
};
tls = mkOption {
type = tlsModule;
default = {};
description = ''
Configuration for secure connections.
'';
};
};
};
smtpModule = types.submodule {
options = {
host = mkOption {
type = types.str;
example = "smtp.example.org";
description = ''
Hostname of SMTP server.
'';
};
port = mkOption {
type = types.nullOr types.ints.positive;
default = null;
example = 465;
description = ''
The port on which the SMTP server listens. If
<literal>null</literal> then the default port is used.
'';
};
tls = mkOption {
type = tlsModule;
default = {};
description = ''
Configuration for secure connections.
'';
};
};
};
maildirModule = types.submodule ({ config, ... }: {
options = {
path = mkOption {
type = types.str;
description = ''
Path to maildir directory where mail for this account is
stored. This is relative to the base maildir path.
'';
};
absPath = mkOption {
type = types.path;
readOnly = true;
internal = true;
default = "${cfg.maildirBasePath}/${config.path}";
description = ''
A convenience option whose value is the absolute path of
this maildir.
'';
};
};
});
# gpgModule = types.submodule {
# };
mailAccount = types.submodule ({ name, config, ... }: {
options = {
name = mkOption {
type = types.str;
readOnly = true;
description = ''
Unique identifier of the account. This is set to the
attribute name of the account configuration.
'';
};
primary = mkOption {
type = types.bool;
default = false;
description = ''
Whether this is the primary account. Only one account may be
set as primary.
'';
};
flavor = mkOption {
type = types.enum [ "plain" "runbox.com" ];
default = "plain";
description = ''
Some email providers have peculiar behavior that require
special treatment. This option is therefore intended to
indicate the nature of the provider.
</para><para>
When this indicates a specific provider then, for example,
the IMAP and SMTP server configuration may be set
automatically.
'';
};
address = mkOption {
type = types.strMatching ".*@.*";
example = "jane.doe@example.org";
description = "The email address of this account.";
};
realName = mkOption {
type = types.str;
example = "Jane Doe";
description = "Name displayed when sending mails.";
};
userName = mkOption {
type = types.nullOr types.str;
default = null;
description = ''
The server username of this account. This will be used as
the SMTP and IMAP user name.
'';
};
passwordCommand = mkOption {
type = types.nullOr (types.either types.str (types.listOf types.str));
default = null;
apply = p: if isString p then splitString " " p else p;
example = "secret-tool lookup email me@example.org";
description = ''
A command, which when run writes the account password on
standard output.
'';
};
folders = mkOption {
type = types.submodule {
options = {
inbox = mkOption {
type = types.str;
default = "Inbox";
description = ''
Relative path of the inbox mail.
'';
};
sent = mkOption {
type = types.nullOr types.str;
default = "Sent";
description = ''
Relative path of the sent mail folder.
'';
};
drafts = mkOption {
type = types.str;
default = "Drafts";
description = ''
Relative path of the drafts mail folder.
'';
};
trash = mkOption {
type = types.str;
default = "Trash";
description = ''
Relative path of the deleted mail folder.
'';
};
};
};
default = {};
description = ''
Standard email folders.
'';
};
imap = mkOption {
type = types.nullOr imapModule;
default = null;
description = ''
The IMAP configuration to use for this account.
'';
};
smtp = mkOption {
type = types.nullOr smtpModule;
default = null;
description = ''
The SMTP configuration to use for this account.
'';
};
maildir = mkOption {
type = types.nullOr maildirModule;
defaultText = { path = "\${name}"; };
description = ''
Maildir configuration for this account.
'';
};
};
config = mkMerge [
{
name = name;
maildir = mkOptionDefault { path = "${name}"; };
}
(mkIf (config.flavor == "runbox.com") {
imap = {
host = "mail.runbox.com";
};
smtp = {
host = "mail.runbox.com";
};
})
];
});
in
{
options.accounts.email = {
maildirBasePath = mkOption {
type = types.str;
default = "${config.home.homeDirectory}/Maildir";
defaultText = "$HOME/Maildir";
apply = p:
if hasPrefix "/" p
then p
else "${config.home.homeDirectory}/${p}";
description = ''
The base directory for account maildir directories. May be a
relative path, in which case it is relative the home
directory.
'';
};
accounts = mkOption {
type = types.attrsOf mailAccount;
default = {};
description = "List of email accounts.";
};
};
config = mkIf (cfg.accounts != {}) {
assertions = [
(
let
primaries =
catAttrs "name"
(filter (a: a.primary)
(attrValues cfg.accounts));
in
{
assertion = length primaries == 1;
message =
"Must have exactly one primary mail account but found "
+ toString (length primaries)
+ optionalString (length primaries > 1)
(", namely " + concatStringsSep ", " primaries);
}
)
];
};
}

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@ -672,6 +672,24 @@ in
'';
}
{
time = "2018-07-01T14:33:15+00:00";
message = ''
A new module is available: 'accounts.email'.
As the name suggests, this new module offers a number of
options for configuring email accounts. This, for example,
includes the email address and owner's real name but also
server settings for IMAP and SMTP.
The intent is to have a central location for account
specific configuration that other modules can use.
Note, this module is still somewhat experimental and its
structure should not be seen as final. Feedback is greatly
appreciated, both positive and negative.
'';
}
];
};
}

View file

@ -13,6 +13,7 @@ with lib;
let
modules = [
./accounts/email.nix
./files.nix
./home-environment.nix
./manual.nix