codeblock.js

Adds Code Block support to JavaScript. A codeblock is source code of some kind, wrapped in a syntax that specifies boundaries (LANGUAGE (ARG) >>>CODE<<<) and variables %%%ARG%%% to be replaced.

main.js

exports.TEST = {
    "main": (javascript () >>>

        console.log("Hello World");

    <<<)
};

Such a codeblock is compiled for execution at build time or using a require overlay in NodeJS.

Install

npm install codeblock
node_modules/.bin/lib.json from node_modules > .~lib.json

API

For a list of all features see tests/run.js and tests/.

const CODEBLOCK = require("codeblock");

// Parse codeblocks in required JavaScript modules
CODEBLOCK.patchGlobalRequire();

// Load JavaScript Source using NodeJS 'require' overlay
const TEST = require("main.js").TEST;

// Freeze from JavaScript Object to JSON
var frozen = CODEBLOCK.freezeToJSON(TEST);

// Thaw from JSON to JavaScript Object again
var obj = CODEBLOCK.thawFromJSON(frozen);

// Re-Freeze from JavaScript Object to JSON
var refrozen = CODEBLOCK.freezeToJSON(obj);

// Freeze from JavaScript Object back to original JavaScript Source
var source = CODEBLOCK.freezeToSource(obj);

// Compile all codeblocks for running
var compiled = CODEBLOCK.compileAll(obj);

// Run all codeblocks (for use in NodeJS)
var result = CODEBLOCK.runAll(made);

Source Formats

codeblock supports converting between the following interchangeable source formats.

JavaScript/JSON Source

exports.TEST = {
    "data": {
        "message": "Hello World"
    },
    "main": (javascript (data) >>>

        console.log("%%%data.message%%%");
        console.log(data.message);

        return data.message;
    <<<)
}

JavaScript/JSON Serialized

exports.TEST = {
    "data": {
        "message": "Hello World"
    },
    "main": {
        ".@": "github.com~0ink~codeblock/codeblock:Codeblock",
        "_code": "\nconsole.log(\"%%%data.message%%%\");\nconsole.log(data.message);\n\nreturn data.message;",
        "_format": "javascript",
        "_args": [
            "data"
        ],
        "_compiled": false
    }
}

JavaScript Instanciated

exports.TEST = {
    data: {
        message: 'Hello World'
    },
    main: {
        [Function: WrappedCodeblock]
        [length]: 1,
        [name]: 'WrappedCodeblock',
        [arguments]: null,
        [caller]: null,
        [prototype]: WrappedCodeblock {
            [constructor]: [Circular]
        }     
    }
}

Target Formats

NOTE: The target formats cannot be converted back to their original source formats as information is typically lost in the process of converting from source to target.

Compiled

All %%% delimited variables are replaced with variables passed in as argument.

exports.TEST = {
    "data": {
        "message": "Hello World"
    },
    "main": {
        ".@": "github.com~0ink~codeblock/codeblock:Codeblock",
        "_code": "\nconsole.log(\"Hello World\");\nconsole.log(data.message);\n\nreturn data.message;",
        "_format": "javascript",
        "_args": [
            "data"
        ],
        "_compiled": true
    }
}

Executed

The codeblock is run using an interpreter and the result replaces the original codeblock.

exports.TEST = {
    "data": {
        "message": "Hello World"
    },
    "main": "Hello World"
}

Provenance

Original source logic under MIT License by Christoph Dorn.