imported.js

// TO USE: Create a file mw-ui-button.csv in the same folder (where CSV export from global search)

const fetch = require( 'node-fetch');
const fs = require('fs');
const CsvReadableStream = require('csv-reader');

let inputStream = fs.createReadStream('mw-ui-button.csv', 'utf8');

const sleep = (delay) => new Promise((resolve) => setTimeout(resolve, delay))

const makeQuery = ( host, title ) => {
    const url = `https://${host}.org/w/api.php?action=query&format=json&prop=linkshere&titles=${encodeURIComponent(title)}&formatversion=2&lhnamespace=0`
    return fetch( url )
        .then((r) => r.json())
        .then((r) => {
            let lh;
            try {
                lh = r.query.pages[0].linkshere;
            } catch ( e ) {
                lh = null;
            }
            if (lh) {
                console.log(host, title, lh.length)
            } else {
                console.log(host,title,0)
            }
        })
}
let i = 0;
const queries = [];
const checkUsage = (a, b) => {
    return makeQuery( a, b ).then(null, () => {
        return checkUsage(a, b);
    });
};

inputStream
	.pipe(new CsvReadableStream({ parseNumbers: true, parseBooleans: true, trim: true }))
	.on('data', function (row) {
        if ( i > 0 ) {
            queries.push( [ row[0], row[1] ] );
        }
        i++;
	})
	.on('end', function () {
        let active = 0;
        setInterval( () => {
            if ( active < 3 ) {
                const row = queries.pop();
                active++;
                checkUsage( row[0], row[1] ).then(() => {
                    active--;
                } );
            }
        }, 100 );
	});