allow managing FlexMark (markdown) plugin and options

gradle.properties

@@ -26,6 +26,7 @@ jgitVersion                 = 6.0.0.202111291000-r
 logbackVersion              = 1.2.10
 orientDbVersion             = 3.1.20
 pebbleVersion               = 3.1.5
+reflectionsVersion			= 0.10.2
 slf4jVersion                = 1.7.32
 snakeYamlVersion            = 1.30
 thymeleafVersion            = 3.0.14.RELEASE

jbake-core/build.gradle

@@ -39,6 +39,7 @@ dependencies {
         exclude group: "junit", module: "junit"
     }
     implementation "com.orientechnologies:orientdb-core:$orientDbVersion"
+    implementation "org.reflections:reflections:$reflectionsVersion"
     api "org.asciidoctor:asciidoctorj:$asciidoctorjVersion", optional
     api "org.codehaus.groovy:groovy:$groovyVersion", optional
     api "org.codehaus.groovy:groovy-templates:$groovyVersion", optional
@@ -47,6 +48,16 @@ dependencies {
     api "org.thymeleaf:thymeleaf:$thymeleafVersion", optional
     api "de.neuland-bfi:jade4j:$jade4jVersion", optional
     api "com.vladsch.flexmark:flexmark:$flexmarkVersion", optional
+    api "com.vladsch.flexmark:flexmark-ext-attributes:$flexmarkVersion", optional
+    api "com.vladsch.flexmark:flexmark-ext-admonition:$flexmarkVersion", optional
+    api "com.vladsch.flexmark:flexmark-ext-aside:$flexmarkVersion", optional
+    api "com.vladsch.flexmark:flexmark-ext-emoji:$flexmarkVersion", optional
+    api "com.vladsch.flexmark:flexmark-ext-enumerated-reference:$flexmarkVersion", optional
+    api "com.vladsch.flexmark:flexmark-ext-gfm-issues:$flexmarkVersion", optional
+    api "com.vladsch.flexmark:flexmark-ext-gfm-strikethrough", optional
+    api "com.vladsch.flexmark:flexmark-ext-gfm-tasklist", optional
+    api "com.vladsch.flexmark:flexmark-ext-gfm-users:$flexmarkVersion", optional
+    api "com.vladsch.flexmark:flexmark-ext-gitlab:$flexmarkVersion", optional
     api "com.vladsch.flexmark:flexmark-profile-pegdown:$flexmarkVersion", optional
     api "io.pebbletemplates:pebble:$pebbleVersion", optional
     implementation "org.jsoup:jsoup:$jsoupVersion"

jbake-core/src/main/java/org/jbake/app/configuration/DefaultJBakeConfiguration.java

@@ -326,6 +326,29 @@ public List<String> getMarkdownExtensions() {
     public void setMarkdownExtensions(String... extensions) {
         setProperty(MARKDOWN_EXTENSIONS.getKey(), StringUtils.join(extensions, ","));
     }
+
+    @Override
+    public Map<String, String> getMarkdownOptions() {
+    	Map<String, String> options = new HashMap<String, String>();
+        List<String>  optionsList = getAsList(MARKDOWN_OPTIONS.getKey());
+
+        if(null != optionsList) {
+	        for (String optionAndValue : optionsList) {
+	        	String[] splited = optionAndValue.split("=(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)", -1);
+	        	if(splited.length == 2) {
+	        		options.put(splited[0], splited[1]);
+	        	}else {
+	        		logger.warn("Not valid MarkDown Option '{}' no '=' String to delimit name and value", optionAndValue);
+	        	}
+	        }
+        }
+
+        return options;
+    }
+
+    public void setMarkdownOptions(String... extensions) {
+        setProperty(MARKDOWN_OPTIONS.getKey(), StringUtils.join(extensions, ","));
+    }
 
     @Override
     public String getOutputExtension() {

jbake-core/src/main/java/org/jbake/app/configuration/JBakeConfiguration.java

@@ -186,15 +186,24 @@ public interface JBakeConfiguration {
      * @return an iterator of configuration keys
      */
     Iterator<String> getKeys();
-
+    
     /**
-     * A list of markdown extensions
+     * A list of markdown options for extension or Parser
      * <p>
      * <code>markdown.extension=HARDWRAPS,AUTOLINKS,FENCED_CODE_BLOCKS,DEFINITIONS</code>
      *
-     * @return list of markdown extensions as string
+     * @return list of markdown options as string
      */
     List<String> getMarkdownExtensions();
+
+    /**
+     * A list of markdown extensions
+     * <p>
+     * <code>markdown.options=ROOT_IMAGE_PATH=/images/emoji,AN_OTHER_OPTION=true</code>
+     *
+     * @return list of markdown extensions as key => value
+     */
+    Map<String, String> getMarkdownOptions();
 
     /**
      * @return file extension to be used for all output files

jbake-core/src/main/java/org/jbake/app/configuration/PropertyList.java

@@ -154,6 +154,11 @@ public abstract class PropertyList {
         "markdown.extensions",
         "comma delimited default markdown extensions; for available extensions: http://www.decodified.com/pegdown/api/org/pegdown/Extensions.html"
     );
+
+    public static final Property MARKDOWN_OPTIONS = new Property(
+        "markdown.options",
+        "comma delimited markdown options; for information for options : https://github.com/vsch/flexmark-java/wiki/Extensions"
+    );
 
     public static final Property OUTPUT_ENCODING = new Property(
         "freemarker.outputencoding",