compilex

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compilex is a node.js library which is used to build online code compiler/interpreter websites and webservices.

You can compile and respond back outputs for all the languages that can be compiled by the server.

Some of the online code compiling/judging websites are

• codepad
• ideone
• HackerRank
• CodeChef

Using compilex , you can built sites and services like the above said examples.

Why compilex ?

1. compilex can detect infinite loops in the users program .
   
2. It can compile programs by getting input from STDIN.
   
3. Generates statistics for the administrator.
   

Supported Languages

compilex is currently in initial development stage . As the library grows , so does the list here .

Language	Support
C	✔
C++	✔
Java	✔
Python	✔
C#	✔
Visual Basic	✔

Work Flow

1. Get the program as input from the client as a request
   
2. Use compilex modules to compile the program
   
3. Get the output and errors in json and string formats
   
4. Respond the output to the client
   

Setting Up Compilers

Inorder to compile any programming language , you need to first have the compiler for that programming language in the server machine.

C and C++

1. Installation :You need GCC compiler that can compile programs from your cmd/terminal
   • Windows - You can get MinGw .
   • Linux - Most of the linux versions are installed with gcc by default. If you haven't got , Take a look at Installing GCC .
2. Testing the Environment :After installing , set your environment variables for accessing the GCC command lines from any directory
   • Windows - create a c file in a directory , execute
     g++ filename.c -o output.exe
     output.exe
     then you will get the output of the program
   • Linux - create a c file in a directory , execute
     gcc filename.c -o output.out
     ./output.out
     then you will get the output of the program

Java

1. Installion : You need JDK ( Java Development Kit ) to compile Java programs.Click here to download JDK for various platforms.
2. Testing the Environment :After installing , set your environment variables for accessing the javac command lines from any directory
   • Create a Java file named Main.java with main function
     javac Main.java
     java Main
     then you will get the output of the program.

Python

1. Installation : You can get and install Python from here
2. Testing the Environment :After installing , set your environment variables for accessing python command lines from any directory
   • Create a python file hello.py and execute
     python hello.py
     then you will get the output of the program.

C# and VB

1. Installation : You can have the idea of accessing C# compiler from here . This step also adds VB compiler to the scope automatically as csc and vbc are located in the same directory
2. Testing the Environment :After installing , set your environment variables for accessing C# and VB command lines from any directory
   • Create a C# or VB file Hello.cs or Hello.vb and execute
     csc Hello.cs
     Hello.exe
     or
     vbc Hello.vb
     Hello.exe
     then you will get the output of the program.

NOTE : Video demos for setting up the compilers and using compilex will be availble soon.

Documentation

1)Require compilex

var compiler = require('compilex');
var options = {stats : true}; //prints stats on console 
compiler.init(options);

init() creates a folder named temp in your project directory which is used for storage purpose. Before using other methods , make sure to call init() method.

2)C and C++

    //if windows  
    var envData = { OS : "windows" , cmd : "g++"}; // (uses g++ command to compile )
    //else
    var envData = { OS : "linux" , cmd : "gcc" }; // ( uses gcc command to compile )
    compiler.compileCPP(envData , code , function (data) {
        res.send(data);
        //data.error = error message 
        //data.output = output value
    });
    
    //res is the response object

3)C and C++ with inputs

    //if windows  
    var envData = { OS : "windows" , cmd : "g++"}; // (uses g++ command to compile )
    //else
    var envData = { OS : "linux" , cmd : "gcc" }; // ( uses gcc command to compile )
    compiler.compileCPPWithInput(envData , code , input , function (data) {
        res.send(data);
    });

4)Java

    //if windows  
    var envData = { OS : "windows"}; 
    //else
    var envData = { OS : "linux" }; // (Support for Linux in Next version)
    compiler.compileJava( envData , code , function(data){
        res.send(data);
    });    

5)Java with inputs

    //if windows  
    var envData = { OS : "windows"}; 
    //else
    var envData = { OS : "linux" }; // (Support for Linux in Next version)
    compiler.compileJavaWithInput( envData , code , input ,  function(data){
        res.send(data);
    });

6)Python

    //if windows  
    var envData = { OS : "windows"}; 
    //else
    var envData = { OS : "linux" }; 
    compiler.compilePython( envData , code , function(data){
        res.send(data);
    });    

7)Python with inputs

    //if windows  
    var envData = { OS : "windows"}; 
    //else
    var envData = { OS : "linux" }; 
    compiler.compilePythonWithInput( envData , code , input ,  function(data){
        res.send(data);        
    });

8)C#

    var envData = { OS : "windows"}; 
    //mono modules for linux is not included till now
    compiler.compileCS( envData , code , function(data){
        res.send(data);
    });    

9)C# with inputs

    var envData = { OS : "windows"}; 
    //mono modules for linux is not included till now
    compiler.compileCSWithInput( envData , code , input ,  function(data){
        res.send(data);        
    });

10)Visual Basic

    var envData = { OS : "windows"}; 
    compiler.compileVB( envData , code , function(data){
        res.send(data);
    });    

11)Visual Basic with inputs

    var envData = { OS : "windows"}; 
    compiler.compileVBWithInput( envData , code , input ,  function(data){
        res.send(data);        
    });

12)Memory Management

All the temporary files ( source code and executables ) are created in your temp directory. flush and flushSync helps you to free the memory by deleting the temporary files.

    compiler.flush(function(){
    console.log('All temporary files flushed !'); 
    });

Synchronous version of flush

    compiler.flushSync();

13)Statistical Data

Getting statistics about your compilex server has been taken care. fullStat returns json data about your server.

    compiler.fullStat(function(data){
        res.send(data);
    });