Running git blame from Node's API

Question

I'm building a VS Code extension which runs git blame as part of the process.

I read that I can execute command line commands from JavaScript with Node's API, using a child process like this:

var exec = require('child_process').exec;

        exec(`ls`
        function (error, stdout, stderr) {
            console.log('stdout: ' + stdout);
            console.log('stderr: ' + stderr);
            if (error !== null) {
                 console.log('exec error: ' + error);
            }
        });

Running this very simple ls command does print out in the console the directory.

However, when I replace exec(ls with exec(git blame -L ${startLine},${endLine} extension.ts it says I'm not in a git repository. Please note that executing the git blame command from my actual terminal does work.

I tried running the command with sudo as well. It throws the error

sudo: a terminal is required to read the password; either use the -S option to read from standard input or configure an askpass helper sudo: a password is required

/private/var/folders/th/40j77cv1587_zndgl34g0m100000gn/T/AppTranslocation/C0CFF9C7-F5C7-4C37-B7BD-1990096D4E41/d/Visual Studio Code.app/Contents/Resources/app/out/bootstrap-fork.js:5

What can I do to make it work?