how to wait for an exec command to fininsh in nodejs

Executing a Command Synchronously in Node.js

To wait for an exec command to finish in Node.js, you can use the execSync function. This function synchronously executes the given command line and returns all the text that is outputted by that command. Here are the steps to achieve this:

1. Using execSync Function:
2. You can use the execSync function to execute a system command synchronously in Node.js. This function is available in the child_process module.
3. Example: const { execSync } = require('child_process'); const result = execSync('node -v'); console.log(result.toString());

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1. Handling Output:

2. The execSync function returns a Buffer object. You can use the toString method to convert the Buffer object to a string and then process the output as needed.

3. Error Handling:

4. It's important to handle any potential errors that may occur during the execution of the command. You can use try-catch blocks to catch and handle any exceptions that may be thrown.

By following these steps, you can wait for an exec command to finish in Node.js and retrieve the output synchronously.

I hope this helps!