Get the estimated size (in number of lines) of a given GitHub repository

github_repolines.js

// to be used with deno run-time
// the first argument must be the repo name
// example: deno run --allow-net .\github_repolines.js microsoft/typescript

async function countGithub(repo) {
    const repoAddress = `https://github.com/${repo}`;
    const repoApi = `https://api.github.com/repos/${repo}` + `/stats/contributors`;
    const response = await fetch(repoApi);
    const contributors = await response.json();
    const lineCounts = contributors.map(contributor => (
        contributor.weeks.reduce((lineCount, week) => lineCount + week.a - week.d, 0)
    ));
    const lines = lineCounts.reduce((lineTotal, lineCount) => lineTotal + lineCount);
    console.table({
		repository: repo,
		address: repoAddress,
		api: repoApi,
		linesOfCode: lines,
	});
}

countGithub(Deno.args[0]); // or count anything you like

If you have deno installed, just copy and paste line below in your terminal:
(Works on Windows, Mac and Linux).

The words after ".js" represents the repo organization and name respectivelly, and separeted by a slash.

deno run --allow-net https://gist.githubusercontent.com/fvilante/6a2ebc2c9f21047f874780a333b6d1e4/raw/a53cadd529434d1c961454c29b7791873e38352e/github_repolines.js microsoft/typescript

Inspirated in this stackoverflow question.

I'm not sure if the computated number of lines includes or excludes doc files for examples, etc.