Support Org #+AUTHOR keyword

Also allow disabling author export.

This commit might be a big behavior change for some as now the author
name is auto-exported to the post front matter.

To disable that, simply put "#+AUTHOR:" or "#+OPTIONS: author:nil" at
the top of your Org file.

With this commit, ox-hugo now supports one more implicit ox.el
feature.

Part of solution to https://github.com/kaushalmodi/ox-hugo/issues/106

ox-hugo.el

@@ -1789,6 +1789,15 @@ INFO is a plist used as a communication channel."
   ;; (message "[hugo front matter DBG] info: %S" (pp info))
   (let* ((fm-format (plist-get info :hugo-front-matter-format))
          (title (org-entry-get (point) "ITEM")) ;Post title
+         (author-list (and (plist-get info :with-author)
+                           (let ((author-raw
+                                  (org-string-nw-p
+                                   (org-export-data (plist-get info :author) info))))
+                             (when author-raw
+                               ;; Comma-separated multiple authors
+                               (let ((author-list-1 (org-split-string author-raw ",")))
+                                 ;; Don't allow spaces around author names.
+                                 (mapcar #'org-trim author-list-1))))))
          (hugo-date-fmt "%Y-%m-%dT%T%z")
          (date-raw (or
                     ;; Get the date from the "CLOSED" property;
@@ -1935,6 +1944,7 @@ INFO is a plist used as a communication channel."
          (data `(;; The order of the elements below will be the order in which the front matter
                  ;; variables will be ordered.
                  (title . ,(org-hugo--sanitize-title info))
+                 (author . ,author-list)
                  (description . ,(org-export-data (plist-get info :description) info))
                  (date . ,date)
                  (publishDate . ,(org-export-data (plist-get info :hugo-publishdate) info))

test/site/content-org/all-posts.org

@@ -1,9 +1,12 @@
 #+HUGO_BASE_DIR: ../
 #+SEQ_TODO: TODO DRAFT DONE
 #+PROPERTY: header-args :eval no
+
 #+MACRO: doc [[https://ox-hugo.scripter.co/doc/$1][$2]]
 #+MACRO: oxhugoissue =ox-hugo= Issue #[[https://github.com/kaushalmodi/ox-hugo/issues/$1][$1]]
 
+#+AUTHOR:
+
 * Preparation
 :PROPERTIES:
 :EXPORT_FILE_NAME: prep
@@ -2609,45 +2612,68 @@ a_{b} a_{bc} a^{b} a^{bc}
 :END:
 This post will be exported without =title= in the front-matter because
 it is disabled using =:EXPORT_OPTIONS: title:nil=.
-* Hugo Aliases                                                      :aliases:
-** Alias without section portion 1
+** Disable exporting author                                    :author:disable:
+:PROPERTIES:
+:EXPORT_OPTIONS: author:nil
+:EXPORT_FILE_NAME: disable-author
+:EXPORT_AUTHOR: Foo Bar
+:END:
+This post will be exported without =author= in the front-matter because
+it is disabled using =:EXPORT_OPTIONS: author:nil=.
+* Miscellaneous Front Matter                                   :front_matter:
+** Hugo Aliases                                                     :aliases:
+*** Alias without section portion 1
 :PROPERTIES:
 :EXPORT_FILE_NAME: alias-without-section-1
 :EXPORT_HUGO_ALIASES: alias-a
 :END:
 As the specified alias does not contain the "/" string, it will be
 auto-prefixed with the section for the current post.
-** New section just for test
+*** New section just for test
 :PROPERTIES:
 :EXPORT_HUGO_SECTION: alias-test
 :END:
-*** Alias without section portion 2
+**** Alias without section portion 2
 :PROPERTIES:
 :EXPORT_FILE_NAME: alias-without-section-2
 :EXPORT_HUGO_ALIASES: alias-b
 :END:
 As the specified alias does not contain the "/" string, it will be
 auto-prefixed with the section for the current post.
-** Alias specifying a different section
+*** Alias specifying a different section
 :PROPERTIES:
 :EXPORT_FILE_NAME: alias-different-section
 :EXPORT_HUGO_ALIASES: /alias-test/alias-c
 :END:
-** Alias specifying root section
+*** Alias specifying root section
 :PROPERTIES:
 :EXPORT_FILE_NAME: alias-root-section
 :EXPORT_HUGO_ALIASES: /alias-d
 :END:
-** Multiple aliases without section portion
+*** Multiple aliases without section portion
 :PROPERTIES:
 :EXPORT_FILE_NAME: alias-multiple-without-section
 :EXPORT_HUGO_ALIASES: alias-e alias-f
 :END:
-** Multiple aliases with section portion
+*** Multiple aliases with section portion
 :PROPERTIES:
 :EXPORT_FILE_NAME: alias-multiple-with-section
 :EXPORT_HUGO_ALIASES: /alias-test/alias-g /alias-test/alias-h
 :END:
+** Author                                                            :author:
+*** Single author
+:PROPERTIES:
+:EXPORT_FILE_NAME: single-author
+:EXPORT_AUTHOR: Foo Bar
+:END:
+This post has 1 author.
+*** Multiple authors
+:PROPERTIES:
+:EXPORT_FILE_NAME: multiple-authors
+:EXPORT_AUTHOR: Foo Bar, Toto Kumar  , Zulu ,Ágota Kristóf
+:END:
+This post has multiple authors. In Org, multiple authors are added
+comma-separated.
 * Real Examples                                               :real_examples:
 :PROPERTIES:
 :EXPORT_HUGO_SECTION: real-examples
@@ -2655,7 +2681,7 @@ auto-prefixed with the section for the current post.
 ** Multifractals in ecology using R                          :math:equations:
 :PROPERTIES:
 :EXPORT_FILE_NAME: multifractals-in-ecology-using-r
-:EXPORT_HUGO_CUSTOM_FRONT_MATTER: :author Leonardo A. Saravia
+:EXPORT_AUTHOR: Leonardo A. Saravia
 :EXPORT_HUGO_CUSTOM_FRONT_MATTER+: :source https://github.com/lsaravia/MultifractalsInR/blob/master/Curso3.md
 :EXPORT_DATE: 2017-11-28T10:48:00-05:00
 :END:
@@ -2767,6 +2793,8 @@ auto-prefixed with the section for the current post.
 ** 神经网络基础    :math:equations:not_english:table:latex:latex_environment:
 :PROPERTIES:
 :EXPORT_FILE_NAME: nn-intro
+:EXPORT_AUTHOR: Feng Ruohang
+:EXPORT_HUGO_CUSTOM_FRONT_MATTER+: :source https://github.com/Vonng/Math/blob/master/nndl/nn-intro.md
 :EXPORT_DATE: 2017-11-29
 :END:
 - Disclaimer :: This post is from the [[https://github.com/Vonng/Math/blob/master/nndl/nn-intro.md][link]] posted by GitHub user

test/site/content-org/auto-set-lastmod.org

@@ -3,6 +3,8 @@
 # Auto-set lastmod field in the below posts.
 #+HUGO_AUTO_SET_LASTMOD: t
 
+#+AUTHOR:
+
 #+FILETAGS: dont_export_during_make_test
 
 * Auto-set Lastmod

test/site/content-org/construct-hugo-front-matter-from-menu-meta-data.org

@@ -2,6 +2,8 @@
 #+HUGO_FRONT_MATTER_FORMAT: yaml
 #+HUGO_MENU: :menu main :parent posts
 
+#+AUTHOR:
+
 * Menu Meta Data in YAML Front Matter                             :menu:yaml:
 :PROPERTIES:
 :EXPORT_FILE_NAME: menu-meta-data-yaml

test/site/content-org/deep-nesting.org

@@ -1,5 +1,7 @@
 #+HUGO_BASE_DIR: ../
 
+#+AUTHOR:
+
 * Introduction
 See https://github.com/kaushalmodi/ox-hugo/issues/81
 

test/site/content-org/hugo-menu-as-keyword.org

@@ -2,6 +2,8 @@
 #+SEQ_TODO: TODO DRAFT DONE
 #+HUGO_MENU: :menu "auto weight"
 
+#+AUTHOR:
+
 * Post with menu 1 (HUGO_MENU as keyword)
 :PROPERTIES:
 :EXPORT_FILE_NAME: hugo-menu-as-keyword--post-with-menu-1

test/site/content-org/hugo-weight-as-keyword-auto-calc.org

@@ -3,6 +3,8 @@
 #+HUGO_WEIGHT: auto
 #+HUGO_TAGS: weight
 
+#+AUTHOR:
+
 * Post 1 with auto calculation of weight (HUGO_WEIGHT as keyword)
 :PROPERTIES:
 :EXPORT_FILE_NAME: post-1-with-auto-calc-of-weight--hugo-weight-as-keyword

test/site/content-org/images-in-content/images-in-content.org

@@ -2,6 +2,8 @@
 #+HUGO_SECTION: images-in-content
 #+STARTUP: inlineimages
 
+#+AUTHOR:
+
 * Post 1
 :PROPERTIES:
 :EXPORT_FILE_NAME: post1

test/site/content-org/images-in-content/post3/post3.org

@@ -3,6 +3,7 @@
 #+STARTUP: inlineimages
 
 #+TITLE: Post 3
+#+AUTHOR:
 
 Post 3 contents
 

test/site/content-org/images-in-content/post4/post4.org

@@ -3,6 +3,7 @@
 #+STARTUP: inlineimages
 
 #+TITLE: Post 4
+#+AUTHOR:
 
 Post 4 contents
 

test/site/content-org/single-posts/allow-empty-titles-1.org

@@ -1,6 +1,7 @@
 #+HUGO_BASE_DIR: ../../
 
 #+TITLE:
+#+AUTHOR:
 #+FILETAGS: empty title
 
 This post will be exported without =title= in the front-matter because

test/site/content-org/single-posts/disable-title-1.org

@@ -1,6 +1,7 @@
 #+HUGO_BASE_DIR: ../../
 
 #+TITLE: Disable exporting title
+#+AUTHOR:
 #+OPTIONS: title:nil
 
 #+FILETAGS: disable title

test/site/content-org/single-posts/export-without-emphasize.org

@@ -1,4 +1,5 @@
 #+TITLE: Table with Org markup where the markup is ignored
+#+AUTHOR:
 
 # Ignore the Org emphasis characters like * and /
 #+OPTIONS: *:nil

test/site/content-org/single-posts/hugo-auto-weight-ineffective-for-per-file-exports.org

@@ -1,4 +1,6 @@
 #+TITLE: Hugo auto weight ineffective for per-file exports
+#+AUTHOR:
+
 #+HUGO_BASE_DIR: ../../
 #+HUGO_WEIGHT: auto
 #+HUGO_TAGS: weight

test/site/content-org/single-posts/post-draft.org

@@ -1,4 +1,5 @@
 #+TITLE: Single Post, but draft
+#+AUTHOR:
 #+DATE: 2017-07-20
 #+HUGO_PUBLISHDATE: 2017-07-22
 #+HUGO_EXPIRYDATE: 2017-07-23

test/site/content-org/single-posts/post-toml.org

@@ -1,4 +1,5 @@
 #+TITLE: Single Post with TOML front matter
+#+AUTHOR:
 #+DATE: 2017-07-20
 #+HUGO_PUBLISHDATE: 2017-07-22
 #+HUGO_EXPIRYDATE: 2017-07-23

test/site/content-org/single-posts/post-yaml.org

@@ -1,4 +1,5 @@
 #+TITLE: Single Post with YAML front matter
+#+AUTHOR:
 #+DATE: 2017-07-20
 #+HUGO_PUBLISHDATE: 2017-07-22
 #+HUGO_EXPIRYDATE: 2017-07-23

test/site/content-org/src-blocks-with-highlight-shortcode.org

@@ -8,6 +8,8 @@
 # shortcode.
 # #+HUGO_CODE_FENCE: t
 
+#+AUTHOR:
+
 #+SEQ_TODO: TODO DRAFT DONE
 
 * Source blocks with Hugo =highlight= shortcode

test/site/content-org/tags-and-categories.org

@@ -1,4 +1,6 @@
 #+TITLE: My Blog
+#+AUTHOR:
+
 #+HUGO_BASE_DIR: ../
 
 #+TAGS: these tags do not get globally applied to the posts

test/site/content/alias-test/alias-without-section-2.md

@@ -1,7 +1,7 @@
 +++
 title = "Alias without section portion 2"
 aliases = ["/alias-test/alias-b"]
-tags = ["aliases"]
+tags = ["front-matter", "aliases"]
 draft = false
 +++
 

test/site/content/posts/alias-different-section.md

@@ -1,6 +1,6 @@
 +++
 title = "Alias specifying a different section"
 aliases = ["/alias-test/alias-c"]
-tags = ["aliases"]
+tags = ["front-matter", "aliases"]
 draft = false
 +++

test/site/content/posts/alias-multiple-with-section.md

@@ -1,6 +1,6 @@
 +++
 title = "Multiple aliases with section portion"
 aliases = ["/alias-test/alias-g", "/alias-test/alias-h"]
-tags = ["aliases"]
+tags = ["front-matter", "aliases"]
 draft = false
 +++

test/site/content/posts/alias-multiple-without-section.md

@@ -1,6 +1,6 @@
 +++
 title = "Multiple aliases without section portion"
 aliases = ["/posts/alias-e", "/posts/alias-f"]
-tags = ["aliases"]
+tags = ["front-matter", "aliases"]
 draft = false
 +++

test/site/content/posts/alias-root-section.md

@@ -1,6 +1,6 @@
 +++
 title = "Alias specifying root section"
 aliases = ["/alias-d"]
-tags = ["aliases"]
+tags = ["front-matter", "aliases"]
 draft = false
 +++

test/site/content/posts/alias-without-section-1.md

@@ -1,7 +1,7 @@
 +++
 title = "Alias without section portion 1"
 aliases = ["/posts/alias-a"]
-tags = ["aliases"]
+tags = ["front-matter", "aliases"]
 draft = false
 +++
 

test/site/content/posts/auto-set-lastmod.md

@@ -1,6 +1,6 @@
 +++
 title = "Auto-set Lastmod"
-lastmod = 2017-12-01T07:02:01-05:00
+lastmod = 2017-12-01T16:24:29-05:00
 tags = ["dont-export-during-make-test"]
 draft = false
 +++

test/site/content/posts/disable-author.md

@@ -0,0 +1,8 @@
++++
+title = "Disable exporting author"
+tags = ["export-option", "author", "disable"]
+draft = false
++++
+
+This post will be exported without `author` in the front-matter because
+it is disabled using `:EXPORT_OPTIONS: author:nil`.

test/site/content/posts/multiple-authors.md

@@ -0,0 +1,9 @@
++++
+title = "Multiple authors"
+author = ["Foo Bar", "Toto Kumar", "Zulu", "Ágota Kristóf"]
+tags = ["front-matter", "author"]
+draft = false
++++
+
+This post has multiple authors. In Org, multiple authors are added
+comma-separated.

test/site/content/posts/single-author.md

@@ -0,0 +1,8 @@
++++
+title = "Single author"
+author = ["Foo Bar"]
+tags = ["front-matter", "author"]
+draft = false
++++
+
+This post has 1 author.

test/site/content/real-examples/multifractals-in-ecology-using-r.md

@@ -1,9 +1,9 @@
 +++
 title = "Multifractals in ecology using R"
+author = ["Leonardo A. Saravia"]
 date = 2017-11-28T10:48:00-05:00
 tags = ["real-examples", "math", "equations"]
 draft = false
-author = "Leonardo A. Saravia"
 source = "https://github.com/lsaravia/MultifractalsInR/blob/master/Curso3.md"
 +++
 

test/site/content/real-examples/nn-intro.md

@@ -1,8 +1,10 @@
 +++
 title = "神经网络基础"
+author = ["Feng Ruohang"]
 date = 2017-11-29
 tags = ["real-examples", "math", "equations", "not-english", "table", "latex", "latex-environment"]
 draft = false
+source = "https://github.com/Vonng/Math/blob/master/nndl/nn-intro.md"
 +++
 
 -   **Disclaimer:** This post is from the [link](https://github.com/Vonng/Math/blob/master/nndl/nn-intro.md) posted by GitHub user

test/site/content/writing-hugo-blog-in-org-file-export.md

@@ -1,8 +1,9 @@
 +++
 title = "Writing Hugo blog in Org (File Export)"
+author = ["Kaushal Modi"]
 date = 2017-09-10
-lastmod = 2017-11-30T14:21:54-05:00
-tags = ["hugo", "org", "dont_export_during_make_test"]
+lastmod = 2017-12-01T16:23:22-05:00
+tags = ["hugo", "org"]
 categories = ["emacs"]
 weight = 2001
 draft = true

test/site/content/writing-hugo-blog-in-org-subtree-export.md

@@ -1,7 +1,8 @@
 +++
 title = "Writing Hugo blog in Org"
+author = ["Kaushal Modi"]
 date = 2017-09-10
-lastmod = 2017-11-30T14:22:00-05:00
+lastmod = 2017-12-01T16:24:07-05:00
 tags = ["dont-export-during-make-test", "hugo", "org"]
 categories = ["emacs"]
 weight = 2001