// instrument all functions in a file with a call log

test2.js

function transformAST(IN) {
  // read the filename
  const fs = require('fs');
  const filename = fs.readFileSync(IN, 'utf8');
  
  // transform the file into an AST
  const esprima = require('esprima');
  const ast = esprima.parseScript(filename);
  
  // traverse the AST and find all function definitions
  const traverse = require('estraverse').traverse;
  traverse(ast, {
    enter: function(node) {
      if (node.type === 'FunctionDeclaration') {
        // add a console.log() call with the names and values of all the parameters passed to the function, plus the name of the function
        let logStatement = 'console.log(IN+":",';
        logStatement += `'Function Name: ${node.id.name}',`;
        node.params.forEach(param => {
          logStatement += `'${param.name}: ' + ${param.name}, `;
        });
        logStatement += `);`;
        node.body.body.unshift(esprima.parseScript(logStatement));
      }
    }
  });
  
  // return the AST as text
  const escodegen = require('escodegen');
  return escodegen.generate(ast);
}

//console.log(transformAST("./doushio/imager/index.js") )
console.log(transformAST("./test2.js") )