HTML 2 Slack mrkdwn

Convert HTML into Slack mrkdwn with Java.

Build with Gradle

• gradle wrapper
• export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home
• ./gradlew tasks --all
• ./gradlew clean assemble
• ls build/libs/html2mrkdwn-1.0.1.jar

Build and Distribution with Maven

Issues can be submitted at https://issues.sonatype.org/

• export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home
• Install gpg or gpg2 according to https://mikeross.xyz/gpg-without-gpgtools-on-mac/ and set gpg.executable inside ~/.m2/settings.xml
• export GPG_TTY=$(tty)
• Make sure that the pom file contains the maven-gpg-plugin plugin according to https://central.sonatype.org/publish/publish-maven/#gpg-signed-components
• Make sure that the pom file contains the maven-source-plugin plugin and the maven-javadoc-plugin plugin
• Make sure that the pom file contains the distributionManagement section according to https://central.sonatype.org/publish/publish-maven/#distribution-management-and-authentication
• Make sure that the pom file contains the required meta information according to https://central.sonatype.org/publish/requirements/#sufficient-metadata
• mvn clean install (Use gpg.passphrase from ~/.m2/settings.xml)
• ls target/html2mrkdwn-1.0.1.jar
• mvn clean deploy (Use gpg.passphrase from ~/.m2/settings.xml)
• https://s01.oss.sonatype.org/#stagingRepositories (https://central.sonatype.org/publish/release/#locate-and-examine-your-staging-repository)
• https://s01.oss.sonatype.org/content/groups/public/org/wyona/html2mrkdwn/html2mrkdwn/
• https://repo1.maven.org/maven2/org/wyona/html2mrkdwn/html2mrkdwn/ (available typically within 30 minutes)

Installation

Gradle:

dependencies {
    compile 'org.wyona.html2mrkdwn:html2mrkdwn:1.0.1'
}

Maven:

<dependencies>
    <dependency>
        <groupId>org.wyona.html2mrkdwn</groupId>
        <artifactId>html2mrkdwn</artifactId>
        <version>1.0.1</version>
    </dependency>
</dependencies>

Usage

import org.wyona.html2mrkdwn.CopyDown;

public class Main {
    public static void main (String[] args) {
        CopyDown converter = new CopyDown();
        String myHtml = "<h1>Some title</h1><div>Some html<p>Another paragraph</p></div>";
        String markdown = converter.convert(myHtml);
        System.out.println(markdown);
        // Some title\n==========\n\nSome html\n\nAnother paragraph\n
    }
}

Options

It is possible to use options for converting markdown:

import org.wyona.html2mrkdwn.CopyDown;
import org.wyona.html2mrkdwn.Options;
import org.wyona.html2mrkdwn.OptionsBuilder;

public class Main {
   public static void main (String[] args) {
       OptionsBuilder optionsBuilder = OptionsBuilder.anOptions();
       Options options = optionsBuilder
               .withBr("-")
               // more options
               .build();
       CopyDown converter = new CopyDown(options);
       String myHtml = "<h1>Some title</h1><div>Some html<p>Another paragraph</p></div>";
       String markdown = converter.convert(myHtml);
       System.out.println(markdown);
   }
}

Option	Valid values	Default
headingStyle	SETEXT or ATX	SETEXT
hr	Any Thematic break	* * *
bulletListMarker	-, +, or *	*
codeBlockStyle	INDENTED or FENCED	INDENTED
fence	``` or ~~~	```
emDelimiter	_ or *	_
strongDelimiter	** or __	**
linkStyle	INLINED or REFERENCED	INLINED
linkReferenceStyle	FULL, COLLAPSED, or SHORTCUT	FULL

Acknowledgment

This library is a fork of https://github.com/furstenheim/copy-down which is a port to Java of the wonderful library Turndown.js.