>(String::from("Mailaddress {addr} not parsable.").into())?,
+ ));
+ }
+ let unsortable_mail = EmailAddress::new(&addr, &default_domain.to_string(), None)?;
+ Ok(OrdEmailAddress(unsortable_mail))
+}
+
+// The output is wrapped in a Result to allow matching on errors.
+// Returns an Iterator to the Reader of the lines of the file.
+pub fn read_lines(filename: P) -> io::Result>>
+where
+ P: AsRef,
+{
+ let file = File::open(filename)?;
+ Ok(io::BufReader::new(file).lines())
+}
+
+/// Generate a Sieve script
+/// from a map of destination addresses to a list of their forwarding addresses.
+///
+/// Addresses are sorted according to the order on `OrdEmailAddress`.
+pub fn generate_sieve_script(redirects: AliasMap) -> String {
+ let mut script: String =
+ "require [\"variables\", \"copy\", \"vnd.stalwart.expressions\", \"envelope\", \"editheader\"];
+
+let \"i\" \"0\";
+while \"i < count(envelope.to)\" {
+ let \"redirected\" \"false\";
+"
+ .to_string();
+ for (redirect, mut destinations) in redirects {
+ script += format!(
+ // inspired by https://github.com/stalwartlabs/mail-server/issues/916#issuecomment-2474844389
+ " if eval \"eq_ignore_case(envelope.to[i], '{}')\" {{
+ addheader \"Delivered-To\" \"{}\";
+{}
+ deleteheader :index 1 :is \"Delivered-To\" \"{}\";
+ let \"redirected\" \"true\";
+ }}
+",
+ redirect.0,
+ redirect.0,
+ {
+ let mut subscript: String = String::new();
+ destinations.sort();
+ for destination in destinations.iter() {
+ subscript += format!(" redirect :copy \"{}\";\n", destination.0).as_str();
+ }
+ subscript
+ },
+ redirect.0
+ )
+ .as_str();
+ }
+ script += " if eval \"!redirected\" {
+ let \"destination\" \"envelope.to[i]\";
+ redirect :copy \"${destination}\";
+ }
+";
+ script += " let \"i\" \"i+1\";\n";
+ script += "}
+discard;";
+ script
+}
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+ use std::str::FromStr;
+
+ #[test]
+ fn recursion_detection() {
+ let result = parse_alias_to_map(vec![AliasFile {
+ content: read_lines("testdata/infiniterec.aliases").unwrap(),
+ default_domain: FQDN::from_str("example.com").unwrap(),
+ }]);
+ assert!(result.is_err());
+ }
+
+ #[test]
+ fn basic_parsing() {
+ let result = parse_alias_to_map(vec![AliasFile {
+ content: read_lines("testdata/simple.aliases").unwrap(),
+ default_domain: FQDN::from_str("example.com").unwrap(),
+ }])
+ .unwrap();
+ assert_eq!(result.len(), 4);
+
+ for redirects in result.iter() {
+ assert_eq!(redirects.1[0].0.to_string(), "me@example.org");
+ }
+ }
+}
diff --git a/packages/alias-to-sieve/src/main.rs b/packages/alias-to-sieve/src/main.rs
new file mode 100644
index 0000000..82b2cd3
--- /dev/null
+++ b/packages/alias-to-sieve/src/main.rs
@@ -0,0 +1,34 @@
+use alias_to_sieve::*;
+use fqdn::FQDN;
+use std::env;
+use std::str::FromStr;
+
+fn main() {
+ let args: Vec = env::args().collect();
+ if args.len() < 2 || args.len() % 2 == 0 {
+ print_help();
+ return;
+ }
+
+ // Collect alias files and their default domains
+ let mut alias_files: Vec = Vec::new();
+ for i in (1..args.len()).step_by(2) {
+ if let Ok(lines) = read_lines(&args[i]) {
+ alias_files.push(AliasFile {
+ content: lines,
+ default_domain: FQDN::from_str(&args[i + 1]).unwrap(),
+ });
+ }
+ }
+ println!(
+ "{}",
+ generate_sieve_script(parse_alias_to_map(alias_files).unwrap())
+ );
+}
+
+fn print_help() {
+ print!(
+ "Reads a virtual alias file and needs a default domain to append to local paths, e.g.
+ ./alias_to_sieve example.com.txt example.com"
+ );
+}
diff --git a/packages/alias-to-sieve/testdata/infiniterec.aliases b/packages/alias-to-sieve/testdata/infiniterec.aliases
new file mode 100644
index 0000000..1ac500e
--- /dev/null
+++ b/packages/alias-to-sieve/testdata/infiniterec.aliases
@@ -0,0 +1,2 @@
+# This creates an infinite recursion
+orga orga
diff --git a/packages/alias-to-sieve/testdata/simple.aliases b/packages/alias-to-sieve/testdata/simple.aliases
new file mode 100644
index 0000000..690f620
--- /dev/null
+++ b/packages/alias-to-sieve/testdata/simple.aliases
@@ -0,0 +1,4 @@
+admin root
+sudo root
+postmaster admin
+root me@example.org
diff --git a/packages/alias_to_sieve/COPYING b/packages/alias_to_sieve/COPYING
new file mode 100644
index 0000000..be3f7b2
--- /dev/null
+++ b/packages/alias_to_sieve/COPYING
@@ -0,0 +1,661 @@
+ GNU AFFERO GENERAL PUBLIC LICENSE
+ Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc.
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+ The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works. By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.
+
+ When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+ Developers that use our General Public Licenses protect your rights
+with two steps: (1) assert copyright on the software, and (2) offer
+you this License which gives you legal permission to copy, distribute
+and/or modify the software.
+
+ A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
+receive widespread use, become available for other developers to
+incorporate. Many developers of free software are heartened and
+encouraged by the resulting cooperation. However, in the case of
+software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and
+letting the public access it on a server without ever releasing its
+source code to the public.
+
+ The GNU Affero General Public License is designed specifically to
+ensure that, in such cases, the modified source code becomes available
+to the community. It requires the operator of a network server to
+provide the source code of the modified version running there to the
+users of that server. Therefore, public use of a modified version, on
+a publicly accessible server, gives the public access to the source
+code of the modified version.
+
+ An older license, called the Affero General Public License and
+published by Affero, was designed to accomplish similar goals. This is
+a different license, not a version of the Affero GPL, but Affero has
+released a new version of the Affero GPL which permits relicensing under
+this license.
+
+ The precise terms and conditions for copying, distribution and
+modification follow.
+
+ TERMS AND CONDITIONS
+
+ 0. Definitions.
+
+ "This License" refers to version 3 of the GNU Affero General Public License.
+
+ "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+ "The Program" refers to any copyrightable work licensed under this
+License. Each licensee is addressed as "you". "Licensees" and
+"recipients" may be individuals or organizations.
+
+ To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy. The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+ A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+ To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy. Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+ To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies. Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+ An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License. If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+ 1. Source Code.
+
+ The "source code" for a work means the preferred form of the work
+for making modifications to it. "Object code" means any non-source
+form of a work.
+
+ A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+ The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that
+Major Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form. A
+"Major Component", in this context, means a major essential component
+(kernel, window system, and so on) of the specific operating system
+(if any) on which the executable work runs, or a compiler used to
+produce the work, or an object code interpreter used to run it.
+
+ The "Corresponding Source" for a work in object code form means all
+the source code needed to generate, install, and (for an executable
+work) run the object code and to modify the work, including scripts to
+control those activities. However, it does not include the work's
+System Libraries, or general-purpose tools or generally available free
+programs which are used unmodified in performing those activities but
+which are not part of the work. For example, Corresponding Source
+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
+such as by intimate data communication or control flow between those
+subprograms and other parts of the work.
+
+ The Corresponding Source need not include anything that users
+can regenerate automatically from other parts of the Corresponding
+Source.
+
+ The Corresponding Source for a work in source code form is that
+same work.
+
+ 2. Basic Permissions.
+
+ All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met. This License explicitly affirms your unlimited
+permission to run the unmodified Program. The output from running a
+covered work is covered by this License only if the output, given its
+content, constitutes a covered work. This License acknowledges your
+rights of fair use or other equivalent, as provided by copyright law.
+
+ You may make, run and propagate covered works that you do not
+convey, without conditions so long as your license otherwise remains
+in force. You may convey covered works to others for the sole purpose
+of having them make modifications exclusively for you, or provide you
+with facilities for running those works, provided that you comply with
+the terms of this License in conveying all material for which you do
+not control copyright. Those thus making or running the covered works
+for you must do so exclusively on your behalf, under your direction
+and control, on terms that prohibit them from making any copies of
+your copyrighted material outside their relationship with you.
+
+ Conveying under any other circumstances is permitted solely under
+the conditions stated below. Sublicensing is not allowed; section 10
+makes it unnecessary.
+
+ 3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+ No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
+
+ When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such circumvention
+is effected by exercising rights under this License with respect to
+the covered work, and you disclaim any intention to limit operation or
+modification of the work as a means of enforcing, against the work's
+users, your or third parties' legal rights to forbid circumvention of
+technological measures.
+
+ 4. Conveying Verbatim Copies.
+
+ You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice;
+keep intact all notices stating that this License and any
+non-permissive terms added in accord with section 7 apply to the code;
+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
+
+ You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
+
+ 5. Conveying Modified Source Versions.
+
+ You may convey a work based on the Program, or the modifications to
+produce it from the Program, in the form of source code under the
+terms of section 4, provided that you also meet all of these conditions:
+
+ a) The work must carry prominent notices stating that you modified
+ it, and giving a relevant date.
+
+ b) The work must carry prominent notices stating that it is
+ released under this License and any conditions added under section
+ 7. This requirement modifies the requirement in section 4 to
+ "keep intact all notices".
+
+ c) You must license the entire work, as a whole, under this
+ License to anyone who comes into possession of a copy. This
+ License will therefore apply, along with any applicable section 7
+ additional terms, to the whole of the work, and all its parts,
+ regardless of how they are packaged. This License gives no
+ permission to license the work in any other way, but it does not
+ invalidate such permission if you have separately received it.
+
+ d) If the work has interactive user interfaces, each must display
+ Appropriate Legal Notices; however, if the Program has interactive
+ interfaces that do not display Appropriate Legal Notices, your
+ work need not make them do so.
+
+ A compilation of a covered work with other separate and independent
+works, which are not by their nature extensions of the covered work,
+and which are not combined with it such as to form a larger program,
+in or on a volume of a storage or distribution medium, is called an
+"aggregate" if the compilation and its resulting copyright are not
+used to limit the access or legal rights of the compilation's users
+beyond what the individual works permit. Inclusion of a covered work
+in an aggregate does not cause this License to apply to the other
+parts of the aggregate.
+
+ 6. Conveying Non-Source Forms.
+
+ You may convey a covered work in object code form under the terms
+of sections 4 and 5, provided that you also convey the
+machine-readable Corresponding Source under the terms of this License,
+in one of these ways:
+
+ a) Convey the object code in, or embodied in, a physical product
+ (including a physical distribution medium), accompanied by the
+ Corresponding Source fixed on a durable physical medium
+ customarily used for software interchange.
+
+ b) Convey the object code in, or embodied in, a physical product
+ (including a physical distribution medium), accompanied by a
+ written offer, valid for at least three years and valid for as
+ long as you offer spare parts or customer support for that product
+ model, to give anyone who possesses the object code either (1) a
+ copy of the Corresponding Source for all the software in the
+ product that is covered by this License, on a durable physical
+ medium customarily used for software interchange, for a price no
+ more than your reasonable cost of physically performing this
+ conveying of source, or (2) access to copy the
+ Corresponding Source from a network server at no charge.
+
+ c) Convey individual copies of the object code with a copy of the
+ written offer to provide the Corresponding Source. This
+ alternative is allowed only occasionally and noncommercially, and
+ only if you received the object code with such an offer, in accord
+ with subsection 6b.
+
+ d) Convey the object code by offering access from a designated
+ place (gratis or for a charge), and offer equivalent access to the
+ Corresponding Source in the same way through the same place at no
+ further charge. You need not require recipients to copy the
+ Corresponding Source along with the object code. If the place to
+ copy the object code is a network server, the Corresponding Source
+ may be on a different server (operated by you or a third party)
+ that supports equivalent copying facilities, provided you maintain
+ clear directions next to the object code saying where to find the
+ Corresponding Source. Regardless of what server hosts the
+ Corresponding Source, you remain obligated to ensure that it is
+ available for as long as needed to satisfy these requirements.
+
+ e) Convey the object code using peer-to-peer transmission, provided
+ you inform other peers where the object code and Corresponding
+ Source of the work are being offered to the general public at no
+ charge under subsection 6d.
+
+ A separable portion of the object code, whose source code is excluded
+from the Corresponding Source as a System Library, need not be
+included in conveying the object code work.
+
+ A "User Product" is either (1) a "consumer product", which means any
+tangible personal property which is normally used for personal, family,
+or household purposes, or (2) anything designed or sold for incorporation
+into a dwelling. In determining whether a product is a consumer product,
+doubtful cases shall be resolved in favor of coverage. For a particular
+product received by a particular user, "normally used" refers to a
+typical or common use of that class of product, regardless of the status
+of the particular user or of the way in which the particular user
+actually uses, or expects or is expected to use, the product. A product
+is a consumer product regardless of whether the product has substantial
+commercial, industrial or non-consumer uses, unless such uses represent
+the only significant mode of use of the product.
+
+ "Installation Information" for a User Product means any methods,
+procedures, authorization keys, or other information required to install
+and execute modified versions of a covered work in that User Product from
+a modified version of its Corresponding Source. The information must
+suffice to ensure that the continued functioning of the modified object
+code is in no case prevented or interfered with solely because
+modification has been made.
+
+ If you convey an object code work under this section in, or with, or
+specifically for use in, a User Product, and the conveying occurs as
+part of a transaction in which the right of possession and use of the
+User Product is transferred to the recipient in perpetuity or for a
+fixed term (regardless of how the transaction is characterized), the
+Corresponding Source conveyed under this section must be accompanied
+by the Installation Information. But this requirement does not apply
+if neither you nor any third party retains the ability to install
+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+ The requirement to provide Installation Information does not include a
+requirement to continue to provide support service, warranty, or updates
+for a work that has been modified or installed by the recipient, or for
+the User Product in which it has been modified or installed. Access to a
+network may be denied when the modification itself materially and
+adversely affects the operation of the network or violates the rules and
+protocols for communication across the network.
+
+ Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+documented (and with an implementation available to the public in
+source code form), and must require no special password or key for
+unpacking, reading or copying.
+
+ 7. Additional Terms.
+
+ "Additional permissions" are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law. If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+ When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it. (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.) You may place
+additional permissions on material, added by you to a covered work,
+for which you have or can give appropriate copyright permission.
+
+ Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders of
+that material) supplement the terms of this License with terms:
+
+ a) Disclaiming warranty or limiting liability differently from the
+ terms of sections 15 and 16 of this License; or
+
+ b) Requiring preservation of specified reasonable legal notices or
+ author attributions in that material or in the Appropriate Legal
+ Notices displayed by works containing it; or
+
+ c) Prohibiting misrepresentation of the origin of that material, or
+ requiring that modified versions of such material be marked in
+ reasonable ways as different from the original version; or
+
+ d) Limiting the use for publicity purposes of names of licensors or
+ authors of the material; or
+
+ e) Declining to grant rights under trademark law for use of some
+ trade names, trademarks, or service marks; or
+
+ f) Requiring indemnification of licensors and authors of that
+ material by anyone who conveys the material (or modified versions of
+ it) with contractual assumptions of liability to the recipient, for
+ any liability that these contractual assumptions directly impose on
+ those licensors and authors.
+
+ All other non-permissive additional terms are considered "further
+restrictions" within the meaning of section 10. If the Program as you
+received it, or any part of it, contains a notice stating that it is
+governed by this License along with a term that is a further
+restriction, you may remove that term. If a license document contains
+a further restriction but permits relicensing or conveying under this
+License, you may add to a covered work material governed by the terms
+of that license document, provided that the further restriction does
+not survive such relicensing or conveying.
+
+ If you add terms to a covered work in accord with this section, you
+must place, in the relevant source files, a statement of the
+additional terms that apply to those files, or a notice indicating
+where to find the applicable terms.
+
+ Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions;
+the above requirements apply either way.
+
+ 8. Termination.
+
+ You may not propagate or modify a covered work except as expressly
+provided under this License. Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
+paragraph of section 11).
+
+ However, if you cease all violation of this License, then your
+license from a particular copyright holder is reinstated (a)
+provisionally, unless and until the copyright holder explicitly and
+finally terminates your license, and (b) permanently, if the copyright
+holder fails to notify you of the violation by some reasonable means
+prior to 60 days after the cessation.
+
+ Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+ Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License. If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+ 9. Acceptance Not Required for Having Copies.
+
+ You are not required to accept this License in order to receive or
+run a copy of the Program. Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance. However,
+nothing other than this License grants you permission to propagate or
+modify any covered work. These actions infringe copyright if you do
+not accept this License. Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+ 10. Automatic Licensing of Downstream Recipients.
+
+ Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License. You are not responsible
+for enforcing compliance by third parties with this License.
+
+ An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations. If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+ You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License. For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+ 11. Patents.
+
+ A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based. The
+work thus licensed is called the contributor's "contributor version".
+
+ A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version. For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+ Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+ In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement). To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+ If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients. "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+ If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+ A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License. You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+ Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+ 12. No Surrender of Others' Freedom.
+
+ If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all. For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+ 13. Remote Network Interaction; Use with the GNU General Public License.
+
+ Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your version
+supports such interaction) an opportunity to receive the Corresponding
+Source of your version by providing access to the Corresponding Source
+from a network server at no charge, through some standard or customary
+means of facilitating copying of software. This Corresponding Source
+shall include the Corresponding Source for any work covered by version 3
+of the GNU General Public License that is incorporated pursuant to the
+following paragraph.
+
+ Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU General Public License into a single
+combined work, and to convey the resulting work. The terms of this
+License will continue to apply to the part which is the covered work,
+but the work with which it is combined will remain governed by version
+3 of the GNU General Public License.
+
+ 14. Revised Versions of this License.
+
+ The Free Software Foundation may publish revised and/or new versions of
+the GNU Affero General Public License from time to time. Such new versions
+will be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Program specifies that a certain numbered version of the GNU Affero General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation. If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+ If the Program specifies that a proxy can decide which future
+versions of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+ Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+ 15. Disclaimer of Warranty.
+
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+
+ Copyright (C)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see .
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source. For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code. There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+.
diff --git a/packages/alias_to_sieve/Cargo.lock b/packages/alias_to_sieve/Cargo.lock
new file mode 100644
index 0000000..114d415
--- /dev/null
+++ b/packages/alias_to_sieve/Cargo.lock
@@ -0,0 +1,326 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "alias_to_sieve"
+version = "0.1.0"
+dependencies = [
+ "email-address-parser",
+ "fqdn",
+]
+
+[[package]]
+name = "block-buffer"
+version = "0.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
+dependencies = [
+ "generic-array",
+]
+
+[[package]]
+name = "bumpalo"
+version = "3.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1628fb46dfa0b37568d12e5edd512553eccf6a22a78e8bde00bb4aed84d5bdbf"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "console_error_panic_hook"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a06aeb73f470f66dcdbf7223caeebb85984942f22f1adb2a088cf9668146bbbc"
+dependencies = [
+ "cfg-if",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "cpufeatures"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59ed5838eebb26a2bb2e58f6d5b5316989ae9d08bab10e0e6d103e656d1b0280"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "crypto-common"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1bfb12502f3fc46cca1bb51ac28df9d618d813cdc3d2f25b9fe775a34af26bb3"
+dependencies = [
+ "generic-array",
+ "typenum",
+]
+
+[[package]]
+name = "digest"
+version = "0.10.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
+dependencies = [
+ "block-buffer",
+ "crypto-common",
+]
+
+[[package]]
+name = "email-address-parser"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7fe19a4967eca30062be4abaf813d929ba48b3bfb21830367f7e1baae37f213a"
+dependencies = [
+ "console_error_panic_hook",
+ "pest",
+ "pest_derive",
+ "quick-xml",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "fqdn"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3e7cf4b6cb33615d9adab21d74fd820753c532ef7c15ff556e382abde22e4023"
+
+[[package]]
+name = "generic-array"
+version = "0.14.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.170"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "875b3680cb2f8f71bdcf9a30f38d48282f5d3c95cbf9b3fa57269bb5d5c06828"
+
+[[package]]
+name = "log"
+version = "0.4.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "30bde2b3dc3671ae49d8e2e9f044c7c005836e7a023ee57cffa25ab82764bb9e"
+
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
+[[package]]
+name = "once_cell"
+version = "1.20.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "945462a4b81e43c4e3ba96bd7b49d834c6f61198356aa858733bc4acf3cbe62e"
+
+[[package]]
+name = "pest"
+version = "2.7.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b7cafe60d6cf8e62e1b9b2ea516a089c008945bb5a275416789e7db0bc199dc"
+dependencies = [
+ "memchr",
+ "thiserror",
+ "ucd-trie",
+]
+
+[[package]]
+name = "pest_derive"
+version = "2.7.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "816518421cfc6887a0d62bf441b6ffb4536fcc926395a69e1a85852d4363f57e"
+dependencies = [
+ "pest",
+ "pest_generator",
+]
+
+[[package]]
+name = "pest_generator"
+version = "2.7.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d1396fd3a870fc7838768d171b4616d5c91f6cc25e377b673d714567d99377b"
+dependencies = [
+ "pest",
+ "pest_meta",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "pest_meta"
+version = "2.7.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e1e58089ea25d717bfd31fb534e4f3afcc2cc569c70de3e239778991ea3b7dea"
+dependencies = [
+ "once_cell",
+ "pest",
+ "sha2",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.93"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quick-xml"
+version = "0.18.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3cc440ee4802a86e357165021e3e255a9143724da31db1e2ea540214c96a0f82"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.38"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "rustversion"
+version = "1.0.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7c45b9784283f1b2e7fb61b42047c2fd678ef0960d4f6f1eba131594cc369d4"
+
+[[package]]
+name = "sha2"
+version = "0.10.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "793db75ad2bcafc3ffa7c68b215fee268f537982cd901d132f89c6343f3a3dc8"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "digest",
+]
+
+[[package]]
+name = "syn"
+version = "2.0.98"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "36147f1a48ae0ec2b5b3bc5b537d267457555a10dc06f3dbc8cb11ba3006d3b1"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "thiserror"
+version = "2.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d452f284b73e6d76dd36758a0c8684b1d5be31f92b89d07fd5822175732206fc"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "2.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26afc1baea8a989337eeb52b6e72a039780ce45c3edfcc9c5b9d112feeb173c2"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "typenum"
+version = "1.18.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1dccffe3ce07af9386bfd29e80c0ab1a8205a2fc34e4bcd40364df902cfa8f3f"
+
+[[package]]
+name = "ucd-trie"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2896d95c02a80c6d6a5d6e953d479f5ddf2dfdb6a244441010e373ac0fb88971"
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "00e2473a93778eb0bad35909dff6a10d28e63f792f16ed15e404fca9d5eeedbe"
+
+[[package]]
+name = "version_check"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
+
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.100"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1edc8929d7499fc4e8f0be2262a241556cfc54a0bea223790e71446f2aab1ef5"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+ "rustversion",
+ "wasm-bindgen-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.100"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2f0a0651a5c2bc21487bde11ee802ccaf4c51935d0d3d42a6101f98161700bc6"
+dependencies = [
+ "bumpalo",
+ "log",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.100"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7fe63fc6d09ed3792bd0897b314f53de8e16568c2b3f7982f468c0bf9bd0b407"
+dependencies = [
+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.100"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ae87ea40c9f689fc23f209965b6fb8a99ad69aeeb0231408be24920604395de"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.100"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a05d73b933a847d6cccdda8f838a22ff101ad9bf93e33684f39c1f5f0eece3d"
+dependencies = [
+ "unicode-ident",
+]
diff --git a/packages/alias_to_sieve/Cargo.toml b/packages/alias_to_sieve/Cargo.toml
new file mode 100644
index 0000000..77b7e28
--- /dev/null
+++ b/packages/alias_to_sieve/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "alias_to_sieve"
+version = "0.1.0"
+edition = "2021"
+
+rust-version = "1.68.2"
+
+[dependencies]
+fqdn = {version = "0.4.2", features = ["domain-label-length-limited-to-63", "domain-name-without-special-chars"]}
+email-address-parser = "2.0.0"
diff --git a/packages/alias_to_sieve/src/lib.rs b/packages/alias_to_sieve/src/lib.rs
new file mode 100644
index 0000000..35ebea2
--- /dev/null
+++ b/packages/alias_to_sieve/src/lib.rs
@@ -0,0 +1,206 @@
+use email_address_parser::EmailAddress;
+use fqdn::FQDN;
+use std::cmp::Ordering;
+use std::collections::BTreeMap;
+use std::error::Error;
+use std::fs::File;
+use std::io::{self, BufRead};
+use std::path::Path;
+
+pub struct AliasFile {
+ pub content: io::Lines>,
+ pub default_domain: FQDN,
+}
+
+#[derive(PartialEq, Eq, Clone)]
+pub struct OrdEmailAddress(EmailAddress);
+
+impl PartialOrd for OrdEmailAddress {
+ fn partial_cmp(&self, other: &Self) -> Option {
+ Some(self.0.to_string().cmp(&other.0.to_string()))
+ }
+}
+
+impl Ord for OrdEmailAddress {
+ fn cmp(&self, other: &Self) -> Ordering {
+ self.0.to_string().cmp(&other.0.to_string())
+ }
+}
+
+pub type AliasMap = BTreeMap>;
+
+/// Read a virtual alias file
+/// and convert it to a map of destination addresses to a list of their final forwarding addresses.
+pub fn parse_alias_to_map(alias_files: Vec) -> Result> {
+ // File must exist in the current path
+ let mut redirect_map: AliasMap = AliasMap::new();
+ let mut destinations: Vec = Vec::new();
+
+ // Extract all pairs (destination to redirect addresses) from the alias files
+ for alias_file in alias_files {
+ for line in alias_file.content {
+ // Ignore comments in the alias file
+ let line = line?;
+ let line = String::from(line.split_at(line.find('#').unwrap_or(line.len())).0);
+ let destination = line.split_at(line.find(char::is_whitespace).unwrap_or(0)).0;
+
+ if destination.is_empty() {
+ continue;
+ }
+
+ let redirects: Vec = line
+ .split_at(line.find(char::is_whitespace).unwrap_or(0))
+ .1
+ .split(' ')
+ .filter(|address| !address.trim().to_string().replace(',', "").is_empty())
+ .map(|addr| to_mailaddress(addr, &alias_file.default_domain))
+ .collect::, _>>()?;
+
+ if redirects.is_empty() {
+ continue;
+ }
+ destinations.push(to_mailaddress(destination, &alias_file.default_domain)?);
+ redirect_map.insert(
+ to_mailaddress(destination, &alias_file.default_domain)?,
+ redirects,
+ );
+ }
+ }
+
+ // Replace redirects that are again forwarded elsewhere by that.
+ // Break after depth max_iterations and assume infinite recursion afterwards.
+ let mut changed = true;
+ let mut iterations = 0;
+ let max_iterations = 100;
+ while changed && iterations < max_iterations {
+ changed = false;
+ iterations += 1;
+ let mut all_new_redirects: AliasMap = AliasMap::new();
+ for destination in &destinations {
+ for forward_to in redirect_map.get(destination).unwrap() {
+ if let Some(new_redirects) = redirect_map.get(forward_to) {
+ changed = true;
+ all_new_redirects
+ .entry(destination.clone())
+ .or_insert(redirect_map.get(destination).unwrap().clone())
+ .retain(|dest| *dest != *forward_to);
+ all_new_redirects
+ .entry(destination.clone())
+ .and_modify(|d| d.extend(new_redirects.iter().cloned()));
+ }
+ }
+ }
+ for (destination, new_redirect) in all_new_redirects {
+ *redirect_map.get_mut(&destination).unwrap() = new_redirect;
+ }
+ }
+ if iterations == max_iterations {
+ return Err(String::from("Possibly infinite recursion detected in parse_alias_map. Did not terminate after {max_iterations} rounds.").into());
+ }
+ Ok(redirect_map)
+}
+
+/// Create an `OrdEmailAddress` from some alias entry.
+/// Return parameter for complete mail addresses and append the default domain for local parts.
+fn to_mailaddress(
+ alias_entry: &str,
+ default_domain: &FQDN,
+) -> Result> {
+ let mut addr = alias_entry.trim().to_string();
+ addr = addr.replace(',', "");
+ if addr.contains('@') {
+ return Ok(OrdEmailAddress(
+ EmailAddress::parse(&addr, None)
+ .ok_or::>(String::from("Mailaddress {addr} not parsable.").into())?,
+ ));
+ }
+ let unsortable_mail = EmailAddress::new(&addr, &default_domain.to_string(), None)?;
+ Ok(OrdEmailAddress(unsortable_mail))
+}
+
+// The output is wrapped in a Result to allow matching on errors.
+// Returns an Iterator to the Reader of the lines of the file.
+pub fn read_lines(filename: P) -> io::Result>>
+where
+ P: AsRef,
+{
+ let file = File::open(filename)?;
+ Ok(io::BufReader::new(file).lines())
+}
+
+/// Generate a Sieve script
+/// from a map of destination addresses to a list of their forwarding addresses.
+///
+/// Addresses are sorted according to the order on `OrdEmailAddress`.
+pub fn generate_sieve_script(redirects: AliasMap) -> String {
+ let mut script: String =
+ "require [\"variables\", \"copy\", \"vnd.stalwart.expressions\", \"envelope\", \"editheader\"];
+
+let \"i\" \"0\";
+while \"i < count(envelope.to)\" {
+ let \"redirected\" \"false\";
+"
+ .to_string();
+ for (redirect, mut destinations) in redirects {
+ script += format!(
+ // inspired by https://github.com/stalwartlabs/mail-server/issues/916#issuecomment-2474844389
+ " if eval \"eq_ignore_case(envelope.to[i], '{}')\" {{
+ addheader \"Delivered-To\" \"{}\";
+{}
+ deleteheader :index 1 :is \"Delivered-To\" \"{}\";
+ let \"redirected\" \"true\";
+ }}
+",
+ redirect.0,
+ redirect.0,
+ {
+ let mut subscript: String = String::new();
+ destinations.sort();
+ for destination in destinations.iter() {
+ subscript += format!(" redirect :copy \"{}\";\n", destination.0).as_str();
+ }
+ subscript
+ },
+ redirect.0
+ )
+ .as_str();
+ }
+ script += " if eval \"!redirected\" {
+ let \"destination\" \"envelope.to[i]\";
+ redirect :copy \"${destination}\";
+ }
+";
+ script += " let \"i\" \"i+1\";\n";
+ script += "}
+discard;";
+ script
+}
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+ use std::str::FromStr;
+
+ #[test]
+ fn recursion_detection() {
+ let result = parse_alias_to_map(vec![AliasFile {
+ content: read_lines("testdata/infiniterec.aliases").unwrap(),
+ default_domain: FQDN::from_str("example.com").unwrap(),
+ }]);
+ assert!(result.is_err());
+ }
+
+ #[test]
+ fn basic_parsing() {
+ let result = parse_alias_to_map(vec![AliasFile {
+ content: read_lines("testdata/simple.aliases").unwrap(),
+ default_domain: FQDN::from_str("example.com").unwrap(),
+ }])
+ .unwrap();
+ assert_eq!(result.len(), 4);
+
+ for redirects in result.iter() {
+ assert_eq!(redirects.1[0].0.to_string(), "me@example.org");
+ }
+ }
+}
diff --git a/packages/alias_to_sieve/src/main.rs b/packages/alias_to_sieve/src/main.rs
new file mode 100644
index 0000000..82b2cd3
--- /dev/null
+++ b/packages/alias_to_sieve/src/main.rs
@@ -0,0 +1,34 @@
+use alias_to_sieve::*;
+use fqdn::FQDN;
+use std::env;
+use std::str::FromStr;
+
+fn main() {
+ let args: Vec = env::args().collect();
+ if args.len() < 2 || args.len() % 2 == 0 {
+ print_help();
+ return;
+ }
+
+ // Collect alias files and their default domains
+ let mut alias_files: Vec = Vec::new();
+ for i in (1..args.len()).step_by(2) {
+ if let Ok(lines) = read_lines(&args[i]) {
+ alias_files.push(AliasFile {
+ content: lines,
+ default_domain: FQDN::from_str(&args[i + 1]).unwrap(),
+ });
+ }
+ }
+ println!(
+ "{}",
+ generate_sieve_script(parse_alias_to_map(alias_files).unwrap())
+ );
+}
+
+fn print_help() {
+ print!(
+ "Reads a virtual alias file and needs a default domain to append to local paths, e.g.
+ ./alias_to_sieve example.com.txt example.com"
+ );
+}
diff --git a/packages/alias_to_sieve/testdata/simple.aliases b/packages/alias_to_sieve/testdata/simple.aliases
new file mode 100644
index 0000000..690f620
--- /dev/null
+++ b/packages/alias_to_sieve/testdata/simple.aliases
@@ -0,0 +1,4 @@
+admin root
+sudo root
+postmaster admin
+root me@example.org
diff --git a/packages/flake-module.nix b/packages/flake-module.nix
new file mode 100644
index 0000000..2ffe2c2
--- /dev/null
+++ b/packages/flake-module.nix
@@ -0,0 +1,29 @@
+{inputs, ...}: {
+ perSystem = {
+ pkgs,
+ system,
+ self',
+ ...
+ }: {
+ # We build the alias to sieve tool here, this is a two step process, we first generate
+ # a nix expression with the crate2nix tool from nixpkgs that directly calls rustc
+ # and thus bypasses cargo. We could also generate this file by hand and version it,
+ # but that would need regeneration every time some dependency is updated, so we
+ # opt for build time generation. Afterwards we import and evaluate the generated
+ # nix expression to build the package. For the explicit solution see:
+ # https://nix-community.github.io/crate2nix/00_guides/30_generating/
+ # and for the documentation to this one
+ # https://nix-community.github.io/crate2nix/00_guides/31_auto_generating/
+ # as this module uses idf and forces builds during the evaluation it might
+ # have drastic performance implications, see
+ # https://nix.dev/manual/nix/2.24/language/import-from-derivation
+ packages.alias-to-sieve = let
+ alias-to-sieve-nix = inputs.crate2nix.tools.${system}.generatedCargoNix {
+ name = "alias-to-sieve";
+ src = ./alias-to-sieve;
+ };
+ in
+ (pkgs.callPackage alias-to-sieve-nix {}).rootCrate.build;
+ checks.alias-to-sieve = self'.packages.alias-to-sieve.override {runTests = true;};
+ };
+}