expToScript.jsx

// Description: convert After Effects expressions for using in a JSX script as a string
​
var expFile = File("exp.txt"); // must be in same directory as this script 
var expFileObj = new File(expFile);
expFileObj.open("r");
​
var expFileContent = expFileObj.read();
​
var expFileContentArray = [];
var convertedExpArray = [];
​
// convert lines of exp.txt file to array
for (var i = 0; i < expFileContent.split("\n").length; i++) {
    if (i != expFileContent.split("\n").length - 1) {
        expFileContentArray[i] = expFileContent.split("\n")[i];
        var convertedLine = "'" + expFileContentArray[i] + "' + '\\n' +";
        convertedLine = convertedLine.replace(/"((?:[^"\\]|\\.)*)"/g, function(match, capture) {
            return '"' + capture.replace(/\\/g, '\\\\') + '"';
        });
        convertedExpArray[i] = convertedLine;
    }
    else {
        expFileContentArray[i] = expFileContent.split("\n")[i];
        var convertedLine = "'" + expFileContentArray[i] + "'";
        convertedLine = convertedLine.replace(/"((?:[^"\\]|\\.)*)"/g, function(match, capture) {
            return '"' + capture.replace(/\\/g, '\\\\') + '"';
        });
        convertedExpArray[i] = convertedLine;
    }
}
​
expFileObj.close();
​
// open exp.txt file with write mode and write convertedExpArray to exp.txt file
expFileObj.open("w");
​
var expFileContent = expFileObj.write(convertedExpArray.join("\n")); // write convertedExpArray to exp.txt file
​
expFileObj.close();