Some versions of MacOSx come with Maven installed. To check, in the terminal, enter:

mvn -version

If Maven isn't installed, download it here. Unzip the file and place the folder in the desired location. 

Next, you will need to update (or create) a file using vim (programming language).

In the terminal, enter:

vim ~/.bash_profile

This window should pop up. The first line contains the path for wherever you placed the maven folder. The second line should be the same as in the screenshot. 

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Some necessary vim commands:

i - insert mode, press esc when finished editing

:wq - save changes and quit vim (press enter afterwards)

:q! - force quit vim without saving changes (press enter afterwards)

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Restart terminal and to verify installation, once again enter:

mvn -version

Tutorial here for reference.

Download ArduBlock here.

In the ardublock-all folder, run the install_openblocks executable which installs OpenBlocks.

Once completed, in the terminal, enter:

mvn validate

This command installs arduino's pde.jar file into the local repository. You should be all set to complile.

In terminal, set the directory with the cd command.

cd /Users/Nate/arduproject/BarnabasRoboticsArdublock-master/ardublock-all 

To compile ardublock use the following command:

mvn compile exec:java -Dexec.mainClass="com.ardublock.Main"

To create a .jar file for the program Arduino itself to run, enter the following:

mvn clean package

The .jar file is created in: 

/ardublock-all/target

Copy this file to:

 /Users/[your username]/Documents/Arduino/tools/ArduBlockTool/tool

Arduino will now run your version of the program.

These three files contain the most important parts of code in order to alter ArduBlock:

1. ardublock.xml 
   • Found under ardublock-all/src/main/resources/com/ardublock/block/ardublock.xml
   • Contains:
     • BlockGenuses - instructions and details for each block found in ArduBlock
     • BlockDrawers - the set of blocks to be found under the same tab in ArduBlock
     • BlockFamilies - define the dropdown options to replace any math operator or variable/constant in ArduBlock
   • BlockGenus Properties:
     • name - block name that will be referenced by block-mapping.properties
     • kind - can be type command (begins the code functions), data (fills command blocks), or function (math operations)
     • color - hex code color
     • initlabel - will be bg.name, used as reference for ardublock.properties
     • list of BlockConnectors that describe what will appear on the right side of the blocks
   • BlockConnector Properties:
     • connector-type - number/boolean/string/poly/number-list, describes the kind of data the block wants to input for this specific connector
     • connector-kind - socket/plug, most connectors will be "socket", but the last BlockConnector for each BlockGenus will describe the block as a whole and is usually plug
     • label - the name of the connector that will appear next to the block socket
2. block-mapping.properties
   • Found under ardublock-all/src/main/resources/com/ardublock/block/block-mapping.properties
   • Lists the name of each block as described in the BlockGenus properties of ardublock.xml, then sets them each equal to their respective Java files that determine their functionality.
   • Blocks that do not have links to Java files can be found in TranslatorBlockFactory.java under /src/main/java/com/ardublock/translator/block/ along with the rest of the Java files.
3. ardublock.properties
   • Found under ardublock-all/src/main/resources/com/ardublock/block/ardublock.properties
   • References the "initlabel" for each BlockGenus described in ardublock.xml using bg.blockGenusName, in order to define each of their names as they will be shown in ArduBlock.
   • Also references BlockConnector and BlockDrawer labels/names from ardublock.xml to define the names as they will be shown in ArduBlock.