Initial importv0.1.0

9 files changed, 1745 insertions, 0 deletions

diff --git a/.dir-locals.el b/.dir-locals.el
new file mode 100644
index 0000000..7c6424f
--- /dev/null
+++ b/.dir-locals.el
@@ -0,0 +1,6 @@
+((nil
+  (indent-tabs-mode . nil))
+ (makefile-mode
+  (indent-tabs-mode . t))
+ (git-commit-mode
+  (git-commit-major-mode . git-commit-elisp-text-mode)))
diff --git a/.github/workflows/compile.yml b/.github/workflows/compile.yml
new file mode 100644
index 0000000..2c1a987
--- /dev/null
+++ b/.github/workflows/compile.yml
@@ -0,0 +1,6 @@
+name: Compile
+on: [push, pull_request]
+jobs:
+  compile:
+    name: Compile
+    uses: emacscollective/workflows/.github/workflows/compile.yml@main
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..01d105e
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,6 @@
+name: Test
+on: [push, pull_request]
+jobs:
+  test:
+    name: Test
+    uses: emacscollective/workflows/.github/workflows/test.yml@main
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..aa4decf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+/*.elc
+/*-autoloads.el
+/*-pkg.el
+/.config.mk
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..f288702
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is 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.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  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.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable.  Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products.  If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary.  To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+  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 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. Use with the GNU Affero General Public License.
+
+  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 Affero 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 special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU 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 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 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 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.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  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 GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..3db2d1b
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,68 @@
+-include .config.mk
+
+PKG = cond-let
+
+ELS   = $(PKG).el
+ELS  += $(PKG)-tests.el
+ELCS  = $(ELS:.el=.elc)
+
+$(PKG).elc:
+$(PKG)-tests.elc: $(PKG).elc
+
+DEPS  =
+
+EMACS      ?= emacs
+EMACS_ARGS ?=
+
+LOAD_PATH  ?= $(addprefix -L ../,$(DEPS))
+LOAD_PATH  += -L .
+
+all: lisp
+
+help:
+	$(info make all          - generate byte-code and autoloads)
+	$(info make lisp         - generate byte-code and autoloads)
+	$(info make redo         - re-generate byte-code and autoloads)
+	$(info make test         - run tests)
+	$(info make clean        - remove generated files)
+	@printf "\n"
+
+redo: clean lisp
+
+lisp: $(ELCS) loaddefs check-declare
+
+loaddefs: $(PKG)-autoloads.el
+
+%.elc: %.el
+	@printf "Compiling $<\n"
+	@$(EMACS) -Q --batch $(EMACS_ARGS) $(LOAD_PATH) -f batch-byte-compile $<
+
+check-declare:
+	@printf " Checking function declarations\n"
+	@$(EMACS) -Q --batch $(EMACS_ARGS) $(LOAD_PATH) \
+	--eval "(check-declare-directory default-directory)"
+
+test: lisp
+	@$(EMACS) -Q --batch $(EMACS_ARGS) $(LOAD_PATH) \
+	-l ert -l $(PKG)-tests.el -f ert-run-tests-batch-and-exit
+
+CLEAN  = $(ELCS) $(PKG)-autoloads.el
+
+clean:
+	@printf " Cleaning...\n"
+	@rm -rf $(CLEAN)
+
+$(PKG)-autoloads.el: $(ELS)
+	@printf " Creating $@\n"
+	@$(EMACS) -Q --batch -l autoload -l cl-lib --eval "\
+(let ((file (expand-file-name \"$@\"))\
+      (autoload-timestamps nil) \
+      (backup-inhibited t)\
+      (version-control 'never)\
+      (coding-system-for-write 'utf-8-emacs-unix))\
+  (write-region (autoload-rubric file \"package\" nil) nil file nil 'silent)\
+  (cl-letf (((symbol-function 'progress-reporter-do-update) (lambda (&rest _)))\
+            ((symbol-function 'progress-reporter-done) (lambda (_))))\
+    (let ((generated-autoload-file file))\
+      (update-directory-autoloads default-directory))))" \
+	2>&1 | sed "/^Package autoload is deprecated$$/d"
diff --git a/README.org b/README.org
new file mode 100644
index 0000000..06d6636
--- /dev/null
+++ b/README.org
@@ -0,0 +1,28 @@
+* Cond-Let — Additional and improved binding conditionals
+
+*This is an ALPHA release!*
+*Breaking changes are possible!*
+
+Emacs provides the binding conditionals ~if-let~, ~if-let*~,
+~when-let~, ~when-let*~, ~and-let*~ and ~while-let~.
+
+This package implements the missing ~and-let~ and ~while-let*~,
+and the original ~cond-let~, ~cond-let*~, ~and$~ and ~and>~.
+
+This package additionally provides more consistent and improved
+implementations of the binding conditionals already provided by
+Emacs.  Merely loading this library does not shawow the built-in
+implementations; this can optionally be done in the context of
+an individual library, as described below.
+
+~cond-let~ and ~cond-let*~ are provided exactly under these names.
+The names of all other macros implemented by this package begin
+with ~cond-let--~, the package's prefix for private symbol.
+
+Users of this package are not expected to use these unwieldy
+names.  Instead one should use Emacs' shorthand feature to use
+all or some of these macros by their conceptual names.
+
+Please see the library header for usage information and the
+docstrings for information about the individual macros.
+See also https://github.com/tarsius/cond-let/wiki.
diff --git a/cond-let-tests.el b/cond-let-tests.el
new file mode 100644
index 0000000..ed09754
--- /dev/null
+++ b/cond-let-tests.el
@@ -0,0 +1,444 @@
+;;; cond-let-tests.el --- Tests for Cond-Let  -*- lexical-binding:t -*-
+
+;; Copyright (C) 2025 Jonas Bernoulli
+
+;; Authors: Jonas Bernoulli <emacs.cond-let@jonas.bernoulli.dev>
+;; Homepage: https://github.com/tarsius/cond-let
+
+;; SPDX-License-Identifier: GPL-3.0-or-later
+
+;; This file is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published
+;; by the Free Software Foundation, either version 3 of the License,
+;; or (at your option) any later version.
+;;
+;; This file 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 General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this file.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Code:
+
+(require 'ert)
+(require 'pp)
+
+(require 'cond-let)
+
+;;; Utilities
+
+(defmacro cond-let-test--with-deterministic-gensym (&rest body)
+  (declare (indent 0))
+  `(let ((prefixes '("anon" ":while-let*"
+                     ":while-let" ":if-let*"
+                     ":cond-let*" ":cond-let"))
+         (counter 0))
+     (cl-letf
+         (((symbol-function #'gensym)
+           (lambda (&optional prefix)
+             (if (member prefix prefixes)
+                 (intern (format "%s%d" prefix (cl-incf counter)))
+               (let ((num (prog1 gensym-counter (cl-incf gensym-counter))))
+                 (make-symbol (format "%s%d" (or prefix "g") num)))))))
+       ,@body)))
+
+(defmacro cond-let-test--macroexpansion (all &optional value form expansion) ;TEMP optional
+  (declare (indent 2))
+  `(cond-let-test--with-deterministic-gensym
+     (should (equal (,(if all #'macroexpand-all #'macroexpand) ',form)
+                    ',expansion))
+     (let ((standard-output #'ignore))
+       (should (equal ,form ,value)))))
+
+(defun cond-let-test--pp-macroexpand-last-sexp (all)
+  (interactive "P")
+  (cond-let-test--with-deterministic-gensym
+    (insert "\n\n")
+    (let ((beg (point)))
+      (insert (pp-to-string (funcall (if all #'macroexpand-all #'macroexpand)
+                                     (pp-last-sexp))))
+      (indent-region beg (point)))))
+
+;;; Cond
+
+(ert-deftest cond-let-test--101-expand--cond-let* ()
+  (cond-let-test--macroexpansion nil '(3 4)
+    (cond-let*
+      ((< 1 0)
+       1)
+      ([b 2]
+       [_ (> b 2)]
+       b)
+      [[c 3]
+       [d (+ c 1)]]
+      ([e 5]
+       [_ (> e (+ c d))]
+       (print e)
+       e)
+      (t
+       (list c d)))
+
+    (catch ':cond-let*1
+      (when (< 1 0)
+        (throw ':cond-let*1 1))
+      (cond-let--when-let*
+          ((b 2)
+           (_ (> b 2)))
+        (throw ':cond-let*1 b))
+      (let* ((c 3)
+             (d (+ c 1)))
+        (cond-let--when-let*
+            ((e 5)
+             (_ (> e (+ c d))))
+          (throw ':cond-let*1 (progn (print e) e)))
+        (when t
+          (throw ':cond-let*1 (list c d))))))
+
+  (cond-let-test--macroexpansion nil '(2 3)
+    (cond-let*
+      ([a nil]
+       (- a))
+      [[b 2]]
+      ([c 3]
+       [_ (> 3 b)]
+       (list b c)))
+
+    (catch ':cond-let*1
+      (cond-let--when-let ((a nil))
+        (throw ':cond-let*1 (- a)))
+      (let ((b 2))
+        (cond-let--when-let*
+            ((c 3)
+             (_ (> 3 b)))
+          (throw ':cond-let*1 (list b c))))))
+
+  (cond-let-test--macroexpansion nil '(1 2 3)
+    (cond-let*
+      [[a 1]
+       [b 2]]
+      ((> 3 (+ a b)) 'c)
+      [[d 3]]
+      ((= (+ a b) d)
+       (list a b d)))
+
+    (catch ':cond-let*1
+      (let* ((a 1)
+             (b 2))
+        (when (> 3 (+ a b))
+          (throw ':cond-let*1 'c))
+        (let ((d 3))
+          (when (= (+ a b) d)
+            (throw ':cond-let*1 (list a b d))))))))
+
+(ert-deftest cond-let-test--102-expand--cond-let ()
+  (cond-let-test--macroexpansion nil nil
+    ))
+
+;;; And
+
+(ert-deftest cond-let-test--103-expand--and-let* ()
+  (cond-let-test--macroexpansion nil 3
+
+    (and-let* ((_ t)
+               (b 1)
+               (c (1+ b))
+               (_ (> c b))
+               (_ (= c 2)))
+      (+ b c))
+
+    (let* ((anon1 t)
+           (b     (and anon1 1))
+           (c     (and b     (1+ b)))
+           (anon2 (and c     (> c b)))
+           (anon3 (and anon2 (= c 2))))
+      (and anon3
+           (+ b c))))
+
+  (cond-let-test--macroexpansion nil 2
+
+    (and-let* ((a 1))
+      (1+ a))
+
+    (let* ((a 1))
+      (and a
+           (1+ a))))
+
+  (cond-let-test--macroexpansion nil 2
+
+    (and-let* ((_ 1))
+      2)
+
+    (let* ((anon1 1))
+      (and anon1 2))))
+
+(ert-deftest cond-let-test--104-expand--and-let ()
+  (cond-let-test--macroexpansion nil 3
+
+    (and-let ((a 1)
+              (b 2))
+      (+ a b))
+
+    (let (anon1 anon2)
+      (and (setq anon1 1)
+           (setq anon2 2)
+           (let ((a anon1)
+                 (b anon2))
+             (+ a b)))))
+
+  (cond-let-test--macroexpansion nil 6
+
+    (and-let ((_ 1)
+              (a 2)
+              (_ 3)
+              (b 4)
+              (_ 5))
+      (+ a b))
+
+    (let (anon1 anon2)
+      (and 1
+           (setq anon1 2)
+           3
+           (setq anon2 4)
+           5
+           (let ((a anon1)
+                 (b anon2))
+             (+ a b)))))
+
+  (cond-let-test--macroexpansion nil 2
+
+    (and-let ((a 1))
+      (1+ a))
+
+    (let ((a 1))
+      (and a
+           (1+ a))))
+
+  (cond-let-test--macroexpansion nil 2
+
+    (and-let ((_ 1))
+      2)
+
+    (let ((anon1 1))
+      (and anon1 2))))
+
+(ert-deftest cond-let-test--105-expand--and$ ()
+  (cond-let-test--macroexpansion nil 3
+
+    (and$ (+ 0 1)
+          (+ $ 2))
+
+    (let (($ (+ 0 1)))
+      (and $
+           (+ $ 2)))))
+
+(ert-deftest cond-let-test--106-expand--and> ()
+  (cond-let-test--macroexpansion nil 6
+
+    (and> (+ 0 1)
+          (+ $ 2)
+          (+ $ 3))
+
+    (let* (($ (+ 0 1))
+           ($ (and $ (+ $ 2))))
+      (and $
+           (+ $ 3))))
+
+  (cond-let-test--macroexpansion nil 4
+
+    (and> (+ 1 1)
+          (+ $ 2))
+
+    (let (($ (+ 1 1)))
+      (and $
+           (+ $ 2)))))
+
+;;; If
+
+(ert-deftest cond-let-test--107-expand--if-let* ()
+  (cond-let-test--macroexpansion nil '(1 2)
+
+    (if-let* ((a 1)
+              (b 2))
+        (list a b)
+      (print 3)
+      4)
+
+    (catch ':if-let*1
+      (let* ((a 1)
+             (b (and a 2)))
+        (when b
+          (throw ':if-let*1 (list a b))))
+      (print 3)
+      4)))
+
+(ert-deftest cond-let-test--108-expand--if-let ()
+  (cond-let-test--macroexpansion nil '(1 2)
+
+    (if-let ((a 1)
+             (b 2))
+        (list a b)
+      3)
+
+    (let (anon1 anon2)
+      (if (and (setq anon1 1)
+               (setq anon2 2))
+          (let ((a anon1)
+                (b anon2))
+            (list a b))
+        3)))
+
+  (cond-let-test--macroexpansion nil '(1)
+
+    (if-let ((a 1))
+        (list a)
+      2)
+
+    (let (anon1)
+      (if (setq anon1 1)
+          (let ((a anon1))
+            (list a))
+        2))))
+
+;;; When
+
+(ert-deftest cond-let-test--109-expand--when-let* ()
+  (cond-let-test--macroexpansion nil 2
+
+    (when-let* ((_ t)
+                (b 1)
+                (c (1+ b))
+                (_ (> c b))
+                (_ (= c 2)))
+      (print b)
+      (print c))
+
+    (let* ((anon1 t)
+           (b     (and anon1 1))
+           (c     (and b (1+ b)))
+           (anon2 (and c (> c b)))
+           (anon3 (and anon2 (= c 2))))
+      (when anon3
+        (print b)
+        (print c))))
+
+  (cond-let-test--macroexpansion nil 1
+
+    (when-let* ((a 1))
+      (print a))
+
+    (let* ((a 1))
+      (when a
+        (print a))))
+
+  (cond-let-test--macroexpansion nil 2
+
+    (when-let* ((_ 1))
+      2)
+
+    (let* ((anon1 1))
+      (when anon1
+        2))))
+
+(ert-deftest cond-let-test--110-expand--when-let ()
+  (cond-let-test--macroexpansion nil 2
+
+    (when-let ((a 1)
+               (b 2))
+      (print a)
+      (print b))
+
+    (let (anon1 anon2)
+      (when (and (setq anon1 1)
+                 (setq anon2 2))
+        (let ((a anon1)
+              (b anon2))
+          (print a)
+          (print b)))))
+
+  (cond-let-test--macroexpansion nil 4
+
+    (when-let ((_ 1)
+               (b 2)
+               (_ 3)
+               (d 4)
+               (_ 5))
+      (print b)
+      (print d))
+
+    (let (anon1 anon2)
+      (when (and 1
+                 (setq anon1 2)
+                 3
+                 (setq anon2 4)
+                 5)
+        (let ((b anon1)
+              (d anon2))
+          (print b)
+          (print d)))))
+
+  (cond-let-test--macroexpansion nil 1
+
+    (when-let ((a 1))
+      (print a))
+
+    (let ((a 1))
+      (when a
+        (print a))))
+
+  (cond-let-test--macroexpansion nil 2
+
+    (when-let ((_ 1))
+      2)
+
+    (let ((anon1 1))
+      (when anon1 2))))
+
+;;; While
+
+(ert-deftest cond-let-test--111-expand--while-let* ()
+  (let ((n 5))
+    (cond-let-test--macroexpansion nil nil
+      (while-let* ((a (setq n (1- n)))
+                   (_ (> a 0)))
+        (print a))
+
+      (catch ':while-let*2
+        (while t
+          (let* ((a     (setq n (1- n)))
+                 (anon1 (and a (> a 0))))
+            (if anon1
+                (print a)
+              (throw ':while-let*2 nil))))))))
+
+(ert-deftest cond-let-test--112-expand--while-let ()
+  (let ((n 5))
+    (cond-let-test--macroexpansion nil nil
+      (while-let ((a (setq n (1- n)))
+                  (_ (> n 0)))
+        (print a))
+
+      (catch ':while-let2
+        (while t
+          (let (anon1)
+            (if (and (setq anon1 (setq n (1- n)))
+                     (> n 0))
+                (let ((a anon1))
+                  (print a))
+              (throw ':while-let2 nil))))))))
+
+
+;;; Shorthands
+
+;; Local Variables:
+;; read-symbol-shorthands: (
+;;   ("and$"      . "cond-let--and$")
+;;   ("and>"      . "cond-let--and>")
+;;   ("and-let"   . "cond-let--and-let")
+;;   ("if-let"    . "cond-let--if-let")
+;;   ("when-let"  . "cond-let--when-let")
+;;   ("while-let" . "cond-let--while-let"))
+;; End:
+
+;;; cond-let-tests.el ends here
diff --git a/cond-let.el b/cond-let.el
new file mode 100644
index 0000000..04b30fc
--- /dev/null
+++ b/cond-let.el
@@ -0,0 +1,509 @@
+;;; cond-let.el --- Additional and improved binding conditionals  -*- lexical-binding:t -*-
+
+;; Copyright (C) 2025 Jonas Bernoulli
+
+;; May contain traces of Emacs, which is
+;; Copyright (C) 1985-2025 Free Software Foundation, Inc.
+
+;; Authors: Jonas Bernoulli <emacs.cond-let@jonas.bernoulli.dev>
+;; Homepage: https://github.com/tarsius/cond-let
+;; Keywords: extensions
+
+;; Package-Version: 0.1.0
+;; Package-Requires: ((emacs "28.1"))
+
+;; SPDX-License-Identifier: GPL-3.0-or-later
+
+;; This file is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published
+;; by the Free Software Foundation, either version 3 of the License,
+;; or (at your option) any later version.
+;;
+;; This file 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 General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this file.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This is an ALPHA release!
+;; Breaking changes are possible!
+
+;; Emacs provides the binding conditionals `if-let', `if-let*',
+;; `when-let', `when-let*', `and-let*' and `while-let'.
+
+;; This package implements the missing `and-let' and `while-let*',
+;; and the original `cond-let', `cond-let*', `and$' and `and>'.
+
+;; This package additionally provides more consistent and improved
+;; implementations of the binding conditionals already provided by
+;; Emacs.  Merely loading this library does not shawow the built-in
+;; implementations; this can optionally be done in the context of
+;; an individual library, as described below.
+
+;; `cond-let' and `cond-let*' are provided exactly under these names.
+;; The names of all other macros implemented by this package begin
+;; with `cond-let--', the package's prefix for private symbol.
+
+;; Users of this package are not expected to use these unwieldy
+;; names.  Instead one should use Emacs' shorthand feature to use
+;; all or some of these macros by their conceptual names.  E.g., if
+;; you want to use all of the available macros, add this at the end
+;; of a library.
+
+;; Local Variables:
+;; read-symbol-shorthands: (
+;;   ("and$"      . "cond-let--and$")
+;;   ("and>"      . "cond-let--and>")
+;;   ("and-let"   . "cond-let--and-let")
+;;   ("if-let"    . "cond-let--if-let")
+;;   ("when-let"  . "cond-let--when-let")
+;;   ("while-let" . "cond-let--while-let"))
+;; End:
+
+;; You can think of these file-local settings as import statements of
+;; sorts.  If you do this, then this package's implementations shadow
+;; the built-in implementations.  Doing so does not affect any other
+;; libraries, which continue to use the built-in implementations.
+
+;; Due to limitations of the shorthand implementation this has to be
+;; done for each individual library.  "dir-locals.el" cannot be used.
+
+;; If you use `and$' and `and>', you might want to add this to your
+;; configuration:
+
+;;   (with-eval-after-load 'cond-let
+;;     (font-lock-add-keywords 'emacs-lisp-mode
+;;                             cond-let-font-lock-keywords t))
+
+;; For information about the individual macros, please refer to their
+;; docstrings.
+
+;; See also https://github.com/tarsius/cond-let/wiki.
+
+;;; Code:
+;;; Cond
+
+(defun cond-let--prepare-clauses (tag when let clauses)
+  "Used by macros `cond-let*' and `cond-let'."
+  (let (body)
+    (setq clauses (nreverse clauses))
+    (while clauses
+      (let ((clause (pop clauses)))
+        (cond
+         ((vectorp clause)
+          (setq body
+                `((,(if (length= clause 1) 'let let)
+                   ,(mapcar (lambda (vec) (append vec nil)) clause)
+                   ,@body))))
+         ((let (varlist)
+            (while (vectorp (car clause))
+              (push (append (pop clause) nil) varlist))
+            (push (cond
+                   (varlist
+                    `(,(if (length= varlist 1) 'cond-let--when-let when)
+                      ,(nreverse varlist)
+                      (throw ',tag ,(macroexp-progn clause))))
+                   ((length= clause 1)
+                    (let ((a (gensym "anon")))
+                      `(let ((,a ,(car clause)))
+                         (when ,a (throw ',tag ,a)))))
+                   (t
+                    `(when ,(pop clause)
+                       (throw ',tag ,(macroexp-progn clause)))))
+                  body))))))
+    body))
+
+(defmacro cond-let* (&rest clauses)
+  "Try each clause until one succeeds.
+
+Each clause has one of these forms:
+- a plain clause   (CONDITION BODY...)
+- a binding clause ([SYMBOL VALUEFORM]... BODY...)
+- a binding vector [[SYMBOL VALUEFORM]...]
+
+A (CONDITION BODY...) clause works as for `cond'.  Evaluate CONDITION,
+and if it yields non-nil, the clause succeeds.  Then evaluate BODY forms
+sequentially and return the value of the last; or if there are no BODY
+forms, return the value of CONDITION.  If CONDITION yields nil, do not
+evaluate the BODY forms and instead proceed to the next clause.
+
+A ([SYMBOL VALUEFORM]... BODY...) clause begins with one or more binding
+vectors, followed by one or more BODY forms.  Bind SYMBOL to the value
+of VALUEFORM.  Each VALUEFORM can refer to symbols already bound by this
+VARLIST (as for `let*').
+
+If all VALUEFORMs yield non-nil, evaluate BODY forms sequentially, with
+VARLIST's bindings in effect, and return the value of the last form.
+
+If any VALUEFORM yields nil, evaluate neither the remaining VALUEFORMs
+nor the BODY forms, and proceed to the next clause.
+
+A [[SYMBOL VALUEFORM]...] form creates bindings, which extend to all
+remaining clauses and binding vectors.  Unlike for the previous form,
+always bind all SYMBOLs, even if a VALUEFORM yields nil.  Always proceed
+to the next clause."
+  (declare (indent 0)
+           (debug (&rest [&or
+                          (vector &rest (vector symbolp form))
+                          ([&rest (vector symbolp form)] body)
+                          (form body)])))
+  (let ((tag (gensym ":cond-let*")))
+    `(catch ',tag
+       ,@(cond-let--prepare-clauses tag 'cond-let--when-let* 'let* clauses))))
+
+(defmacro cond-let (&rest clauses)
+  "Try each clause until one succeeds.
+
+Each clause has one of these forms:
+- a plain clause   (CONDITION BODY...)
+- a binding clause ([SYMBOL VALUEFORM]... BODY...)
+- a binding vector [[SYMBOL VALUEFORM]...]
+
+A (CONDITION BODY...) clause works as for `cond'.  Evaluate CONDITION,
+and if it yields non-nil, the clause succeeds.  Then evaluate BODY forms
+sequentially and return the value of the last; or if there are no BODY
+forms, return the value of CONDITION.  If CONDITION yields nil, do not
+evaluate the BODY forms and instead proceed to the next clause.
+
+A ([SYMBOL VALUEFORM]... BODY...) clause begins with one or more binding
+vectors, followed by one or more BODY forms.  Bind SYMBOL to the value
+of VALUEFORM.  Evaluate all VALUEFORMs before binding their respective
+SYMBOLs (as for `let').
+
+If all VALUEFORMs yield non-nil, evaluate BODY forms sequentially, with
+VARLIST's bindings in effect, and return the value of the last form.
+
+If any VALUEFORM yields nil, evaluate neither the remaining VALUEFORMs
+nor the BODY forms, and proceed to the next clause.
+
+A [[SYMBOL VALUEFORM]...] form creates bindings, which extend to all
+remaining clauses and binding vectors.  Evaluate all VALUEFORMs before
+binding their respective SYMBOLs.  Unlike for the previous form, bind
+all SYMBOLs, even if a VALUEFORM yields nil.  Always proceed to the
+next clause."
+  (declare (indent 0) (debug cond-let))
+  (let ((tag (gensym ":cond-let")))
+    `(catch ',tag
+       ,@(cond-let--prepare-clauses tag 'cond-let--when-let 'let clauses))))
+
+;;; Common
+
+(defun cond-let--prepare-varlist (varlist)
+  "Used by Cond-Let's `when-let*', `and-let*' and `while-let*'.
+Also used by other macros via `cond-let--prepare-varforms'.
+Return (VARLIST LASTVAR)."
+  (let (prevvar)
+    (list (mapcar (lambda (binding)
+                    (unless (length= binding 2)
+                      (signal 'error (cons "Invalid binding" binding)))
+                    (pcase-let ((`(,var ,form) binding))
+                      (when (string-prefix-p "_" (symbol-name var))
+                        (setq var (gensym "anon")))
+                      (prog1 (if prevvar
+                                 `(,var (and ,prevvar ,form))
+                               (list var form))
+                        (setq prevvar var))))
+                  varlist)
+          prevvar)))
+
+(defun cond-let--prepare-varforms (varlist &optional if-let)
+  "Used by Cond-Let's `when-let', `and-let', `while-let' and `if-let'.
+Return (ANON-VARLIST ANON-SETQ VARLIST LASTVAR), or if the length of
+VARLIST is 1 and IF-LET is nil, return (nil nil VARLIST LASTVAR)."
+  (if (and (not if-let)
+           (length= varlist 1))
+      `(nil nil ,@(cond-let--prepare-varlist varlist))
+    (let ((triples
+           (mapcar (lambda (binding)
+                     (unless (length= binding 2)
+                       (signal 'error (cons "Invalid binding" binding)))
+                     (pcase-let ((`(,var ,form) binding))
+                       (when (string-prefix-p "_" (symbol-name var))
+                         (setq var nil))
+                       (list (and var (gensym "anon"))
+                             var
+                             form)))
+                   varlist)))
+      (list (mapcan (pcase-lambda (`(,anon ,_ ,_))
+                      (and anon (list anon)))
+                    triples)
+            (mapcar (pcase-lambda (`(,anon ,_ ,form))
+                      (if anon
+                          `(setq ,anon ,form)
+                        form))
+                    triples)
+            (mapcan (pcase-lambda (`(,anon ,var ,_))
+                      (and var `((,var ,anon))))
+                    triples)
+            (cadr (car (last triples)))))))
+
+;;; And
+
+(defmacro cond-let--and-let* (varlist &optional bodyform)
+  "Bind according to VARLIST until one yields nil, else evaluate BODYFORM.
+
+Each element of VARLIST is a list (SYMBOL VALUEFORM), which binds SYMBOL
+to the value of VALUEFORM.  Each VALUEFORM can refer to symbols already
+bound by this VARLIST (as for `let*').
+
+Evaluate VALUEFORMs until on of them yields nil.  If that happens return
+nil, and evaluate neither the remaining VALUEFORMs nor BODYFORM.  If all
+VALUEFORMs yield non-nil, evaluate BODYFORM with the bindings in effect,
+and return its value; or if there is no BODYFORM, the value of the last
+VALUEFORM."
+  (declare (indent 1)
+           (debug ((&rest (symbolp form)) form)))
+  (pcase-let ((`(,varlist ,lastvar)
+               (cond-let--prepare-varlist varlist)))
+    `(let* ,varlist
+       ,(if bodyform
+            `(and ,lastvar ,bodyform)
+          lastvar))))
+
+(defmacro cond-let--and-let (varlist &optional bodyform)
+  "Bind according to VARLIST until one yields nil, else evaluate BODYFORM.
+
+Each element of VARLIST is a list (SYMBOL VALUEFORM), which binds SYMBOL
+to the value of VALUEFORM.  Evaluate all VALUEFORMs before binding their
+respective SYMBOLs (as for `let').
+
+Evaluate VALUEFORMs until on of them yields nil.  If that happens return
+nil, and evaluate neither the remaining VALUEFORMs nor BODYFORM.  If all
+VALUEFORMs yield non-nil, evaluate BODYFORM with the bindings in effect,
+and return its value; or if there is no BODYFORM, the value of the last
+VALUEFORM."
+  (declare (indent 1) (debug cond-let--and-let*))
+  (pcase-let ((`(,anon ,set ,bind ,lastvar)
+               (cond-let--prepare-varforms varlist)))
+    (cond (anon
+           `(let ,anon
+              (and ,@set
+                   (let ,bind
+                     ,(or bodyform lastvar)))))
+          (t
+           `(let ,bind
+              ,(if bodyform
+                   `(and ,lastvar ,bodyform)
+                 lastvar))))))
+
+(defmacro cond-let--and$ (varform bodyform)
+  "Bind variable `$' to value of VARFORM and conditionally evaluate BODYFORM.
+
+If VARFORM yields a non-nil value, bind the symbol `$' to that value,
+evalute BODYFORM with that binding in effect, and return the value of
+BODYFORM.  If VARFORM yields nil, do not evaluate BODYFORM, and return
+nil."
+  (declare (debug (form form)))
+  `(let (($ ,varform))
+     (and $ ,bodyform)))
+
+(defmacro cond-let--and> (form form2 &rest forms)
+  "Bind variables according to each VARFORM until one of them yields nil.
+
+Evaluate the first FORM and if that yields a non-nil value, bind the
+symbol `$' to that value, and evaluate the next FORM with that binding
+in effect.  Repeat this process with subsequent FORMs until one yields
+nil, then return nil without evaluate the remaining FORMs.  If all
+FORMs yield non-nil, return the value of the last FORM.
+
+\(fn FORM FORM...)"
+  (declare (debug (form form body)))
+  `(,(if forms 'let* 'let)
+    (($ ,form)
+     ,@(and forms
+            (mapcar (lambda (form)
+                      `($ (and $ ,form)))
+                    (cons form2 (butlast forms)))))
+    (and $
+         ,(or (car (last forms))
+              form2))))
+
+;;; If
+
+(defmacro cond-let--if-let* (varlist then &rest else)
+  "Bind variables according to VARLIST and evaluate THEN or ELSE.
+
+Each element of VARLIST is a list (SYMBOL VALUEFORM), which binds SYMBOL
+to the value of VALUEFORM.  Each VALUEFORM can refer to symbols already
+bound by this VARLIST (as for `let*').
+
+If all VALUEFORMs yield non-nil, evaluate THEN with VARLIST's bindings
+in effect, and return its value.  THEN must be one expression.
+
+If any VALUEFORM yields nil, evaluate ELSE sequentially and return the
+value of the last form; or if there are no ELSE forms return nil.  The
+bindings from VARLIST do _not_ extend to the ELSE forms.
+
+\(fn VARLIST THEN [ELSE...])"
+  (declare (indent 2)
+           (debug ((&rest (symbolp form)) form body)))
+  (pcase-let ((`(,varlist ,lastvar)
+               (cond-let--prepare-varlist varlist))
+              (tag (gensym ":if-let*")))
+    `(catch ',tag
+       (let* ,varlist
+         (when ,lastvar
+           (throw ',tag ,then)))
+       ,@else)))
+
+(defmacro cond-let--if-let (varlist then &rest else)
+  "Bind variables according to VARLIST and evaluate THEN or ELSE.
+
+Each element of VARLIST is a list (SYMBOL VALUEFORM), which binds SYMBOL
+to the value of VALUEFORM.  Evaluate all VALUEFORMs before binding their
+respective SYMBOLs (as for `let').
+
+If all VALUEFORMs yield non-nil, evaluate THEN with VARLIST's bindings
+in effect, and return its value.  THEN must be one expression.
+
+If any VALUEFORM yields nil, evaluate ELSE sequentially and return the
+value of the last form; or if there are no ELSE forms return nil.  The
+bindings from VARLIST do _not_ extend to the ELSE forms.
+
+\(fn VARLIST THEN [ELSE...])"
+  (declare (indent 2) (debug cond-let--if-let*))
+  (pcase-let* ((`(,anon ,set ,bind ,_)
+                (cond-let--prepare-varforms varlist t))
+               (set (if (length= set 1) (car set) (cons 'and set))))
+    `(let ,anon
+       (if ,set
+           (let ,bind
+             ,then)
+         ,@else))))
+
+;;; When
+
+(defmacro cond-let--when-let* (varlist bodyform &rest body)
+  "Bind variables according to VARLIST and conditionally evaluate BODY.
+
+Each element of VARLIST is a list (SYMBOL VALUEFORM), which binds SYMBOL
+to the value of VALUEFORM.  Each VALUEFORM can refer to symbols already
+bound by this VARLIST (as for `let*').
+
+If all VALUEFORMs yield non-nil, evaluate BODY forms sequentially, with
+VARLIST's bindings in effect, and return the value of the last form.
+
+If any VALUEFORM yields nil, evaluate neither the remaining VALUEFORMs
+nor the BODY forms, and instead return nil.
+
+BODY must be one or more expressions.  If VARLIST is empty, do nothing
+and return nil.
+
+\(fn VARLIST BODY...)"
+  (declare (indent 1)
+           (debug ((&rest (symbolp form)) form body)))
+  (pcase-let ((`(,varlist ,lastvar)
+               (cond-let--prepare-varlist varlist)))
+    `(let* ,varlist
+       (when ,lastvar
+         ,bodyform ,@body))))
+
+(defmacro cond-let--when-let (varlist bodyform &rest body)
+  "Bind variables according to VARLIST and conditionally evaluate BODY.
+
+Each element of VARLIST is a list (SYMBOL VALUEFORM), which binds SYMBOL
+to the value of VALUEFORM.  Evaluate all VALUEFORMs before binding their
+respective SYMBOLs (as for `let').
+
+If all VALUEFORMs yield non-nil, evaluate BODY forms sequentially, with
+VARLIST's bindings in effect, and return the value of the last form.
+
+If any VALUEFORM yields nil, evaluate neither the remaining VALUEFORMs
+nor the BODY forms, and instead return nil.
+
+BODY must be one or more expressions.  If VARLIST is empty, do nothing
+and return nil.
+
+\(fn VARLIST BODY...)"
+  (declare (indent 1) (debug cond-let--when-let*))
+  (pcase-let ((`(,anon ,set ,bind ,lastvar)
+               (cond-let--prepare-varforms varlist)))
+    (cond (anon
+           `(let ,anon
+              (when (and ,@set)
+                (let ,bind
+                  ,bodyform ,@body))))
+          (t
+           `(let ,bind
+              (when ,lastvar
+                ,bodyform ,@body))))))
+
+;;; While
+
+(defmacro cond-let--while-let* (varlist &rest body)
+  "Bind variables according to VARLIST, conditionally evaluate BODY, and repeat.
+
+Each element of VARLIST is a list (SYMBOL VALUEFORM), which binds SYMBOL
+to the value of VALUEFORM.  Each VALUEFORM can refer to symbols already
+bound by this VARLIST (as for `let*').
+
+If all VALUEFORMs yield non-nil, evaluate BODY forms sequentially, with
+VARLIST's bindings in effect, and repeat the loop.
+
+If any VALUEFORM yields nil, evaluate neither the remaining VALUEFORMs
+nor the BODY forms, and instead return, always yielding nil.
+
+BODY can be zero or more expressions.
+
+\(fn VARLIST [BODY...])"
+  (declare (indent 1) (debug cond-let--if-let*))
+  (pcase-let ((`(,varlist ,lastvar)
+               (cond-let--prepare-varlist varlist))
+              (tag (gensym ":while-let*")))
+    `(catch ',tag
+       (while t
+         (let* ,varlist
+           (if ,lastvar
+               ,(macroexp-progn body)
+             (throw ',tag nil)))))))
+
+(defmacro cond-let--while-let (varlist bodyform &rest body)
+  "Bind variables according to VARLIST, conditionally evaluate BODY, and repeat.
+
+Each element of VARLIST is a list (SYMBOL VALUEFORM), which binds SYMBOL
+to the value of VALUEFORM.  Evaluate all VALUEFORMs before binding their
+respective SYMBOLs (as for `let').
+
+If all VALUEFORMs yield non-nil, evaluate BODY forms sequentially, with
+VARLIST's bindings in effect, and repeat the loop.
+
+If any VALUEFORM yields nil, evaluate neither the remaining VALUEFORMs
+nor the BODY forms, and instead return, always yielding nil.
+
+BODY can be one or more expressions.
+
+\(fn VARLIST BODY...)"
+  (declare (indent 1) (debug cond-let--if-let*))
+  (pcase-let ((`(,anon ,set ,bind ,lastvar)
+               (cond-let--prepare-varforms varlist))
+              (tag (gensym ":while-let")))
+    (cond (anon
+           `(catch ',tag
+              (while t
+                (let ,anon
+                  (if (and ,@set)
+                      (let ,bind
+                        ,bodyform ,@body)
+                    (throw ',tag nil))))))
+          (t
+           `(catch ',tag
+              (while t
+                (let ,bind
+                  (if ,lastvar
+                      ,(macroexp-progn (cons bodyform body))
+                    (throw ',tag nil)))))))))
+
+;;; Font-Lock
+
+(defvar cond-let-font-lock-keywords
+  '(("\\_<\\$\\_>" 0 'font-lock-variable-name-face))
+  "Highlight `$' using `font-lock-variable-name-face'.
+To add these keywords, add this to your configuration:
+\(font-lock-add-keywords \\='emacs-lisp-mode cond-let-font-lock-keywords t)")
+
+(provide 'cond-let)
+;;; cond-let.el ends here