Markdown to HTML Page Generator Maven Plugin

Plugin creates static HTML pages with Maven and Markdown. Uses flexmark-java Markdown processor. The code is Open Source and under MIT license.

Plugin Information:

<plugin>
    <groupId>com.ruleoftech</groupId>
    <artifactId>markdown-page-generator-plugin</artifactId>
    <version>2.4.0</version>
</plugin>

Artifacts:

You can configure the input and output directories, which files to copy and which pegdown options are used. You can also include custom header and footer and general title.

Default configuration which can be overridden:

inputDirectory: ${project.basedir}/src/main/resources/markdown/
outputDirectory: ${project.build.directory}/html/

Configuration options:

applyFiltering: apply variables substitution if true. Default false.

Example:

header.html:

<!DOCTYPE html>

<html lang="${lang}">
<head>
</head>

page.md:

# Title 
{lang=en}

will output in page.html:

<!DOCTYPE html>

<html lang="en">
<head>
</head>
      <h1>Title</h1>

headerHtmlFile: Location of header HTML file as String, ${project.basedir}/src/main/resources/markdown/html/header.html

Example:
```
<!DOCTYPE html>
<html lang="en">
<head>
    <title>titleToken</title>
    <meta charset="utf-8" />
    <link rel="stylesheet" href="##SITE_BASE##/css/default.css">
</head>
```
Note: ##SITE_BASE## will be translated to a relative path from the markdown file's directory to base directory. This is not necessary if recursiveInput configuration is false.
footerHtmlFile : Location of header HTML file as String, ${project.basedir}/src/main/resources/markdown/html/footer.html

Example:
```
  <footer>
    </footer>
</html>
```
copyDirectories: Comma separated list of directories to copy to output directory, like: `css,js,images,folder*/images,**images'
defaultTitle: If set the titleToken is replaced in every page. Otherwise the first h1 is used.
recursiveInput: Process also inputDirectory's sub directories if option true. Default false.
transformRelativeMarkdownLinks: Transform relative url suffix from .md to .html if option true. Default false.
attributes: defines a list of attributes by Node class to apply to HTML results. Each attribute has the syntax: NodeClass|attributeName1=attributeValue1|attributeName2=attributeValue2 will add attributeName1 and attributeName2 to element node NodeClass

for table, block quote and ordered list item class customization:
```
<attributes>
    <attribute>TableBlock|class=table table-striped table-bordered</attribute>
    <attribute>BlockQuote|class=red</attribute>
    <attribute>OrderedListItem|style="color:red;"</attribute>
</attributes>
```
Core Nodes:
- AutoLink
- BlockQuote
- BulletList
- BulletListItem
- Code
- Emphasis
- FencedCodeBlock
- Heading
- Image
- ImageRef
- IndentedCodeBlock
- Link
- LinkRef
- MailLink
- OrderedList
- OrderedList
- OrderedListItem
- Strikethrough
- StrongEmphasis
- TableBlock
- TableBody
- TableCaption
- TableCell
- TableHead
- TableRow
- ThematicBreak
pegdownExtensions: Comma separated list of constants as specified in com.vladsch.flexmark.profiles.pegdown.Extensions. The default is TABLES.

ℹ️ flexmark-java has many more extensions and configuration options than pegdown in addition to extensions available in pegdown 1.6.0, the following extensions are available:
- SMARTS: Beautifies ... . . ., -- and --- to …, …, – and — respectively.
- QUOTES: Beautifies single quotes ', ", << and >> to ‘ ’ ‛, “ ” ‟, « and »
- SMARTYPANTS: Convenience extension enabling both, SMARTS and QUOTES, at once.
- ABBREVIATIONS: Abbreviations in the way of PHP Markdown Extra.
- ANCHORLINKS: Generate anchor links for headers by taking the first range of alphanumerics and spaces.
- HARDWRAPS: Alternative handling of newlines, see Github-flavoured-Markdown
- AUTOLINKS: Plain, undelimited autolinks the way Github-flavoured-Markdown implements them.
- TABLES: Tables similar to MultiMarkdown (which is in turn like the PHP Markdown Extra: tables tables, but with colspan support).
- DEFINITIONS: Definition lists in the way of PHP Markdown Extra: definition list.
- FENCED_CODE_BLOCKS: Fenced Code Blocks in the way of PHP Markdown Extra: fenced code or Github-flavoured-Markdown.
- SUPPRESS_HTML_BLOCKS: Suppresses the output of HTML blocks.
- SUPPRESS_INLINE_HTML: Suppresses the output of inline HTML elements.
- WIKILINKS: Support [[Wiki-style links]] with a customizable URL rendering logic.
- STRIKETHROUGH: Support ~~strikethroughs~~ as supported in Pandoc and Github-flavoured-Markdown.
- ATXHEADERSPACE: Require a space between the # and the header title text, as per Github-flavoured-Markdown. Frees up # without a space to be just plain text.
- FORCELISTITEMPARA: Wrap a list item or definition term in <p> tags if it contains more than a simple paragraph.
- RELAXEDHRULES: allow horizontal rules without a blank line following them.
- TASKLISTITEMS: parses bullet lists of the form * [ ], * [x] and * [X] to create Github-flavoured-Markdown task list items.
- EXTANCHORLINKS: Generate anchor links for headers using complete contents of the header.
  - Spaces and non-alphanumerics replaced by -, multiple dashes trimmed to one.
  - Anchor link is added as first element inside the header with empty content: <h1><a name="header"></a>header</h1>
- EXTANCHORLINKS_WRAP: used in conjunction with above to create an anchor that wraps header content: <h1><a name="header">header</a></h1>
- TOC: used to enable table of contents extension [TOC] The TOC tag has the following format: [TOC style]. style consists of space separated list of options:
  - levels=levelList where level list is a comma separated list of levels or ranges. Default is to include heading levels 2 and 3. Examples:
    - levels=4 include levels 2, 3 and 4
    - levels=2-4 include levels 2, 3 and 4. same as levels=4
    - levels=2-4,5 include levels 2, 3, 4 and 5
    - levels=1,3 include levels 1 and 3
  - text to only include the text of the heading
  - formatted to include text and inline formatting
  - bullet to use a bullet list for the TOC items
  - numbered to use a numbered list for TOC items
  - hierarchy: hierarchical list of headings
  - flat: flat list of headings
  - reversed: flat reversed list of headings
  - increasing: flat, alphabetically increasing by heading text
  - decreasing: flat, alphabetically decreasing by heading text
- MULTI_LINE_IMAGE_URLS: enables parsing of image urls spanning more than one line the format is strict ![alt text](urladdress? must be the last non-blank segment on a line. The terminating ) or "title") must be the first non-indented segment on the line. Everything in between is sucked up as part of the URL except for blank lines.
- RELAXED_STRONG_EMPHASIS_RULES: allow Strong/Emphasis marks to start when not preceded by alphanumeric for _ and as long as not surrounded by spaces for * instead of only when preceded by spaces.
- FOOTNOTES: Support MultiMarkdown style footnotes: [^n] for footnote reference and [^n]: Footnote text for footnotes. Where n is one or more digit, letter, -, _ or .. Footnotes will be put at the bottom of the page, sequentially numbered in order of appearance of the footnote reference. Footnotes that are not referenced will NOT be included in the HTML output.
```
This paragraph has a footnote[^1] and another footnote[^two].

This one has more but out of sequence[^4] and[^eight].

[^two]: Footnote 2 with a bit more text
    and another continuation line

[^1]: Footnote 1

[^3]: Unused footnote, it will not be added to the end of the page.

[^4]: Out of sequence footnote

[^eight]: Have one that is used.
```
  will generate:
```
<p>This paragraph has a footnote<sup id="fnref-1"><a href="#fn-1" class="footnote-ref">1</a></sup> and another footnote<sup id="fnref-2"><a href="#fn-2" class="footnote-ref">2</a></sup>.</p>
<p>This one has more but out of sequence<sup id="fnref-3"><a href="#fn-3" class="footnote-ref">3</a></sup> and<sup id="fnref-4"><a href="#fn-4" class="footnote-ref">4</a></sup>. </p>
<div class="footnotes">
<hr/>
<ol>
<li id="fn-1"><p>Footnote 1<a href="#fnref-1" class="footnote-backref">&#8617;</a></p></li>
<li id="fn-2"><p>Footnote 2 with a bit more text  and another continuation line<a href="#fnref-2" class="footnote-backref">&#8617;</a></p></li>
<li id="fn-3"><p>Out of sequence footnote<a href="#fnref-3" class="footnote-backref">&#8617;</a></p></li>
<li id="fn-4"><p>Have one that is used.<a href="#fnref-4" class="footnote-backref">&#8617;</a></p></li>
</ol>
</div>
```
  to look like this:
  This paragraph has a footnote¹ and another footnote².
  
  This one has more but out of sequence³ and⁴.
  1. Footnote 1↩
  2. Footnote 2 with a bit more text and another continuation line↩
  3. Out of sequence footnote↩
  4. Have one that is used.↩
- SUBSCRIPT: subscript extension ~subscript~
- SUPERSCRIPT: superscript extension ^superscript^
- INSERTED: inserted or underlined extension ++inserted++
inputFileExtensions: Comma-separated input file extensions (auto trim included), default: md

Example

  <configuration>
    <inputFileExtensions> md, markdown </inputFileExtensions>
  </configuration>

inputEncoding: Charset-Name used for reading the md-input, default: ${project.build.sourceEncoding} or Default-Charset
outputEncoding: Charset-Name used for writing the html-output, default: ${project.build.sourceEncoding} or Default-Charset

The output will be:

target/html/name_of_file.html

Configuration

Add the plugin to the pom file in your project:

<build>
    <plugins>
        <plugin>
            <groupId>com.ruleoftech</groupId>
            <artifactId>markdown-page-generator-plugin</artifactId>
            <version>2.1.0</version>
            <executions>
                <execution>
                    <phase>process-resources</phase>
                    <goals>
                        <goal>generate</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

Or with custom header and footer:

<plugin>
    <groupId>com.ruleoftech</groupId>
    <artifactId>markdown-page-generator-plugin</artifactId>
    <version>2.1.0</version>
    <executions>
        <execution>
            <phase>process-resources</phase>
            <goals>
                <goal>generate</goal>
            </goals>
        </execution>
    </executions>
    <configuration>
        <headerHtmlFile>${project.basedir}/src/main/resources/markdown/html/header.html</headerHtmlFile>
        <footerHtmlFile>${project.basedir}/src/main/resources/markdown/html/footer.html</footerHtmlFile>
        <copyDirectories>css,js</copyDirectories>
    </configuration>
</plugin>

You can also specify the Pegdown extensions:

<plugin>
    <groupId>com.ruleoftech</groupId>
    <artifactId>markdown-page-generator-plugin</artifactId>
    <version>2.1.0</version>
    <executions>
        <execution>
            <phase>process-resources</phase>
            <goals>
                <goal>generate</goal>
            </goals>
        </execution>
    </executions>
    <configuration>
        <pegdownExtensions>TABLES,FENCED_CODE_BLOCKS,AUTOLINKS</pegdownExtensions>
    </configuration>
</plugin>

Input- and Output-Encoding can be specified by:

<plugin>
    <groupId>com.ruleoftech</groupId>
    <artifactId>markdown-page-generator-plugin</artifactId>
    <version>2.1.0</version>
    <executions>
        <execution>
            <phase>process-resources</phase>
            <goals>
                <goal>generate</goal>
            </goals>
        </execution>
    </executions>
    <configuration>
        <inputDirectory>${basedir}/src/test/resources/encoding-project/src/main/resources/markdown</inputDirectory>
        <outputDirectory>${basedir}/target/test-harness/encoding-project/html</outputDirectory>
        <inputEncoding>UTF-8</inputEncoding>
        <outputEncoding>ISO-8859-15</outputEncoding>
    </configuration>
</plugin>

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CHANGELOG.md		CHANGELOG.md
LICENSE		LICENSE
Readme.md		Readme.md
pom.xml		pom.xml

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Markdown to HTML Page Generator Maven Plugin

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