◊(Local Yarn Code "Changes On Branch cf26929b73bb95cd")

# Licensing

This project includes both writing and code. I want people to be able to use the code safely and
without restriction, but for authors to have tighter control over their writing, images and other
content.

Accordingly:

* Each file is licensed separately. The header of each file, or its reference in `NOTICES.txt`,
  determines how you are allowed to use the contents of that file.
* The source code files generally use a very permissive license, the Blue Oak Model license. A copy
  of that license is included below).
* Other files, such as those containing the content of the website and books, are included here by
  permission of their authors, and are generally not licensed for reuse unless specifically
  provided.

Note that nothing here applies to files that aren’t included in [this project’s Fossil
repository](https://thelocalyarn.com/cgi-bin/yarncode/dir?ci=tip).

## Giving Credit

Please consider giving public credit to this project if you use significant amounts of its code in
any software or system, or if you publish any work using code from this project. This credit should
be a short notice that, at a minimum, includes this project’s name *The Local Yarn* and its domain
name `thelocalyarn.com`.

Suggested examples:

* If users access your system or work by running a program you provide, include the notice in the
  program’s *About* screen (for a graphical or interactive program) or in the output of the
  program’s “version” argument (for command-line programs).
* If users access your system or work via the World Wide Web, put the notice or a link to the notice
  at the bottom of the home page. 
* If your work is published as a printed book, include the notice in the book’s front matter.

# Blue Oak Model License

Version 1.0.0

## Purpose

This license gives everyone as much permission to work with this software as possible, while
protecting contributors from liability.

## Acceptance

In order to receive this license, you must agree to its rules. The rules of this license are both
obligations under that agreement and conditions to your license. You must not do anything with this
software that triggers a rule that you cannot or will not follow.

## Copyright

Each contributor licenses you to do everything with this software that would otherwise infringe that
contributor's copyright in it.

## Notices

You must ensure that everyone who gets a copy of any part of this software from you, with or without
changes, also gets the text of this license or a link to <https://blueoakcouncil.org/license/1.0.0>.

## Excuse

If anyone notifies you in writing that you have not complied with [Notices](#notices), you can keep
your license by taking all practical steps to comply within 30 days after the notice.  If you do not
do so, your license ends immediately.

## Patent

Each contributor licenses you to do everything with this software that would otherwise infringe any
patent claims they can license or become able to license.

## Reliability

No contributor can revoke this license.

## No Liability

***As far as the law allows, this software comes as is, without any warranty or condition, and no
contributor will be liable to anyone for any damages related to this software or this license, under
any kind of legal claim.***

All files in this repository, unless stated otherwise, are copyright (c) 2018
by Joel Dueck, and not licensed for reuse except as noted otherwise.

The _source code_ files (which include `.rkt`, `.pp`, and `.css` files)
generally include notices stating that they are licensed for use under the
terms of the Apache 2.0 license, a copy of which is included below.

Other supplementary files (such as `makefile`) may specify different license
terms.

I do NOT give you permission to reuse or redistribute, in any form, any of the
images or prose content in this repository, unless that image or prose content
is specifically provided under other licensing terms. If you would like to
license any of this content, please contact me directly.

                                 Apache License
                           Version 2.0, January 2004
                        http://www.apache.org/licenses/

   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

   1. Definitions.

      "License" shall mean the terms and conditions for use, reproduction,
      and distribution as defined by Sections 1 through 9 of this document.

      "Licensor" shall mean the copyright owner or entity authorized by
      the copyright owner that is granting the License.

      "Legal Entity" shall mean the union of the acting entity and all
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      direction or management of such entity, whether by contract or
      otherwise, or (ii) ownership of fifty percent (50%) or more of the
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      "You" (or "Your") shall mean an individual or Legal Entity
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      "Source" form shall mean the preferred form for making modifications,
      including but not limited to software source code, documentation
      source, and configuration files.

      "Object" form shall mean any form resulting from mechanical
      transformation or translation of a Source form, including but
      not limited to compiled object code, generated documentation,
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      "Work" shall mean the work of authorship, whether in Source or
      Object form, made available under the License, as indicated by a
      copyright notice that is included in or attached to the work
      (an example is provided in the Appendix below).

      "Derivative Works" shall mean any work, whether in Source or Object
      form, that is based on (or derived from) the Work and for which the
      editorial revisions, annotations, elaborations, or other modifications
      represent, as a whole, an original work of authorship. For the purposes
      of this License, Derivative Works shall not include works that remain
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      the Work and Derivative Works thereof.

      "Contribution" shall mean any work of authorship, including
      the original version of the Work and any modifications or additions
      to that Work or Derivative Works thereof, that is intentionally
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      to the Licensor or its representatives, including but not limited to
      communication on electronic mailing lists, source code control systems,
      and issue tracking systems that are managed by, or on behalf of, the
      Licensor for the purpose of discussing and improving the Work, but
      excluding communication that is conspicuously marked or otherwise
      designated in writing by the copyright owner as "Not a Contribution."

      "Contributor" shall mean Licensor and any individual or Legal Entity
      on behalf of whom a Contribution has been received by Licensor and
      subsequently incorporated within the Work.

   2. Grant of Copyright License. Subject to the terms and conditions of
      this License, each Contributor hereby grants to You a perpetual,
      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
      copyright license to reproduce, prepare Derivative Works of,
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      Work and such Derivative Works in Source or Object form.

   3. Grant of Patent License. Subject to the terms and conditions of
      this License, each Contributor hereby grants to You a perpetual,
      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
      (except as stated in this section) patent license to make, have made,
      use, offer to sell, sell, import, and otherwise transfer the Work,
      where such license applies only to those patent claims licensable
      by such Contributor that are necessarily infringed by their
      Contribution(s) alone or by combination of their Contribution(s)
      with the Work to which such Contribution(s) was submitted. If You
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      or contributory patent infringement, then any patent licenses
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      as of the date such litigation is filed.

   4. Redistribution. You may reproduce and distribute copies of the
      Work or Derivative Works thereof in any medium, with or without
      modifications, and in Source or Object form, provided that You
      meet the following conditions:

      (a) You must give any other recipients of the Work or
          Derivative Works a copy of this License; and

      (b) You must cause any modified files to carry prominent notices
          stating that You changed the files; and

      (c) You must retain, in the Source form of any Derivative Works
          that You distribute, all copyright, patent, trademark, and
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      (d) If the Work includes a "NOTICE" text file as part of its
          distribution, then any Derivative Works that You distribute must
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          within such NOTICE file, excluding those notices that do not
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          of the following places: within a NOTICE text file distributed
          as part of the Derivative Works; within the Source form or
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          within a display generated by the Derivative Works, if and
          wherever such third-party notices normally appear. The contents
          of the NOTICE file are for informational purposes only and
          do not modify the License. You may add Your own attribution
          notices within Derivative Works that You distribute, alongside
          or as an addendum to the NOTICE text from the Work, provided
          that such additional attribution notices cannot be construed
          as modifying the License.

      You may add Your own copyright statement to Your modifications and
      may provide additional or different license terms and conditions
      for use, reproduction, or distribution of Your modifications, or
      for any such Derivative Works as a whole, provided Your use,
      reproduction, and distribution of the Work otherwise complies with
      the conditions stated in this License.

   5. Submission of Contributions. Unless You explicitly state otherwise,
      any Contribution intentionally submitted for inclusion in the Work
      by You to the Licensor shall be under the terms and conditions of
      this License, without any additional terms or conditions.
      Notwithstanding the above, nothing herein shall supersede or modify
      the terms of any separate license agreement you may have executed
      with Licensor regarding such Contributions.

   6. Trademarks. This License does not grant permission to use the trade
      names, trademarks, service marks, or product names of the Licensor,
      except as required for reasonable and customary use in describing the
      origin of the Work and reproducing the content of the NOTICE file.

   7. Disclaimer of Warranty. Unless required by applicable law or
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      Contributor provides its Contributions) on an "AS IS" BASIS,
      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
      PARTICULAR PURPOSE. You are solely responsible for determining the
      appropriateness of using or redistributing the Work and assume any
      risks associated with Your exercise of permissions under this License.

   8. Limitation of Liability. In no event and under no legal theory,
      whether in tort (including negligence), contract, or otherwise,
      unless required by applicable law (such as deliberate and grossly
      negligent acts) or agreed to in writing, shall any Contributor be
      liable to You for damages, including any direct, indirect, special,
      incidental, or consequential damages of any character arising as a
      result of this License or out of the use or inability to use the
      Work (including but not limited to damages for loss of goodwill,
      work stoppage, computer failure or malfunction, or any and all
      other commercial damages or losses), even if such Contributor
      has been advised of the possibility of such damages.

   9. Accepting Warranty or Additional Liability. While redistributing
      the Work or Derivative Works thereof, You may choose to offer,
      and charge a fee for, acceptance of support, warranty, indemnity,
      or other liability obligations and/or rights consistent with this
      License. However, in accepting such obligations, You may act only
      on Your own behalf and on Your sole responsibility, not on behalf
      of any other Contributor, and only if You agree to indemnify,
      defend, and hold each Contributor harmless for any liability
      incurred by, or claims asserted against, such Contributor by reason
      of your accepting any such warranty or additional liability.

   END OF TERMS AND CONDITIONS

   APPENDIX: How to apply the Apache License to your work.

      To apply the Apache License to your work, attach the following
      boilerplate notice, with the fields enclosed by brackets "[]"
      replaced with your own identifying information. (Don't include
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      file or class name and description of purpose be included on the
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   Copyright [yyyy] [name of copyright owner]

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

# Copyright 2019 Joel Dueck
# This file is part of The Local Yarn
# Licensed under the terms of the Blue Oak Model License 1.0.0
# https://blueoakcouncil.org/license/1.0.0
# 
# Copying and distribution of this file, with or without modification,
# are permitted in any medium without royalty provided the copyright
# notice and this notice are preserved.  This file is offered as-is,
# You may not use this file except in compliance with that license.
# without any warranty.
#
SHELL = /bin/bash

# ~~~ Variables used by rules ~~~
#

core-files := pollen.rkt dust.rkt
html-deps  := snippets-html.rkt tags-html.rkt

#lang racket/base

;; Copyright (c) 2018 Joel Dueck.
;;
;; Licensed under the Apache License, Version 2.0 (the "License");
;; you may not use this file except in compliance with the License.
;; A copy of the License is included with this source code, in the
;; Licensed under the Local Yarn License 1.0.0. You may not use this 
;; file except in compliance with that license. A copy of the license
;; is included with this source code, in the file “LICENSE.md”.
;; file "LICENSE.txt".
;; You may also obtain a copy of the License at
;;
;;       http://www.apache.org/licenses/LICENSE-2.0
;;
;; Unless required by applicable law or agreed to in writing, software
;; distributed under the License is distributed on an "AS IS" BASIS,
;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
;; See the License for the specific language governing permissions and
;; limitations under the License.
;;
;; Author contact information:
;;   joel@jdueck.net
;; Maintainer contact information:
;;   Joel Dueck (joel@jdueck.net)
;;   https://joeldueck.com
;; -------------------------------------------------------------------------

;; Functions for tags and template content used in all Pollen source files and templates.

(require (for-syntax racket/base
                     racket/syntax