Example to raise https://github.com/nodegit/nodegit/issues/1495

nodegit_bug_1495.js

// jshint esversion:6
const NodeGit = require('nodegit')
  , path = require('path')
  , MAX_PARALLEL_JOBS = 8
  , REPOSITORY_BASE_PATH = '/tmp/node_git_bug_1495'
  ;

/**
 * Expecting typical github urls here, like: "https://github.com/username/projectname"
 * returns REPOSITORY_BASE_PATH + "/username_projectname"
 */
function getRepoPath(remoteUrl) {
    let dir = remoteUrl.split('/')
            // remove empty entries, if the url ended with a slash
            .filter(x=>x)
            .slice(-2).join('_');
    return path.join(REPOSITORY_BASE_PATH, dir);
}

/**
 * Get remote with name `remoteName`. If the remote does not exist it
 * is created and `remoteUrl` is used.
 */
function get_remote(repo, remoteName, remoteUrl) {
    return NodeGit.Remote.create(repo, remoteName, remoteUrl)
        .then(null, err=> {
            if(err.errno !== NodeGit.Error.CODE.EEXISTS)
                throw err;
            return repo.getRemote(remoteName);
        });
}

function gitJob(remoteUrl) {
    // get the repository
    let repositoryPath = getRepoPath(remoteUrl);
    return NodeGit.Repository.init(repositoryPath, /*isBare:*/1)
        // get/create the remote
        .then(repo=>get_remote(repo, /*remoteName:*/'upstream', remoteUrl))
        // fetch the branch
        .then(remote=>remote.fetch('master'));
}


/**
 * We use `workerId` to log and get an idea of the flow of execution.
 * There's probably not much more to get from this information.
 */
function runJsWorker(workerId, queue, [success, fail, total]) {
    if(!queue.length) {
        // Out of jobs; This worker is done, don't return another promise.
        console.log('worker-id', workerId, 'no jobs left, terminating');
        return true;
    }
    let job = queue.shift();
    console.log('worker-id', workerId, 'dispatching job', job
              , 'previous success:', success,'fail:', fail, 'total:', total);
    return gitJob(job)
        .then(()=>{
                console.log('worker-id', workerId, 'done job', job);
                return [success+=1, fail, total+=1];
            }
          , err=>{
                console.error('worker-id', workerId, 'failed job', job
                            , 'with', err);
                // don't end the worker (by re-raising)
                return [success, fail+=1, total+=1];
            }
        )
        // repeat
        .then(runJsWorker.bind(null,workerId, queue));
}

function main(queue) {
    var jsWorkers = [];
    console.log('Starting', MAX_PARALLEL_JOBS, 'js "workers", for'
              , queue.length, 'jobs.');
    for(let i=0;i<MAX_PARALLEL_JOBS;i++)
        jsWorkers.push(runJsWorker(i, queue, [0, 0, 0]));
    return Promise.all(jsWorkers).then(
        results=>{
            console.log('DONE', results.length, 'workers!');
            return 0;
        }
      , err=>{
            console.error('FAILED:', err);
            return 1;
        }
    );
}

var queue = [
    "https://github.com/googlefonts/abeezee.git"
  , "https://github.com/m4rc1e/Abel"
  , "https://github.com/googlefonts/MooniakFontsGFVersion"
  , "https://github.com/cyrealtype/Adamina.git"
  , "https://github.com/adobe-fonts/adobe-blank"
  , "https://github.com/huertatipografica/Alegreya"
  , "https://github.com/huertatipografica/Alegreya-Sans"
  , "https://github.com/AlessioLaiso/aleo"
  , "https://github.com/jmsole/alfaslab"
  , "https://github.com/cyrealtype/Alice"
  , "https://github.com/cyrealtype/Alike.git"
  , "https://github.com/antonxheight/Allan"
  , "https://github.com/googlefonts/amaranth"
  , "https://github.com/googlefonts/AmaticSC.git"
  , "https://github.com/cyrealtype/amethysta"
  , "https://github.com/alif-type/amiri"
  , "https://github.com/etunni/Amita.git"
  , "https://github.com/TypeNetwork/fb-Amstelvar"
  , "https://github.com/googlefonts/anaheimFont.git"
  , "https://github.com/googlefonts/AntonFont.git"
  , "https://github.com/vernnobile/antonioFont/"
  , "https://github.com/etunni/arapey"
  , "https://github.com/Omnibus-Type/ArchivoBlack"
  , "https://github.com/Omnibus-Type/ArchivoNarrow"
  , "https://github.com/alexeiva/Arsenal"
  , "https://github.com/cyrealtype/Artifika"
  , "https://github.com/antonxheight/Arvo"
  , "https://github.com/etunni/Arya.git"
  , "https://github.com/Omnibus-Type/Asap"
  , "https://github.com/Omnibus-Type/AsapCondensed"
  , "https://github.com/EbenSorkin/Asar.git"
  , "https://github.com/EbenSorkin/Atomic-Age.git"
  , "https://github.com/cadsondemak/athiti"
  , "https://github.com/cyrealtype/Aubrey"
  , "https://github.com/etunni/average"
  , "https://github.com/alexeiva/badscript"
  , "https://github.com/Omnibus-Type/Bahiana"
  , "https://github.com/agoodfeelingco/bakbak"
  , "https://github.com/googlefonts/bangers"
  , "https://github.com/jpt/barlow"
  , "https://github.com/Omnibus-Type/Barrio"
  , "https://github.com/EbenSorkin/Basic.git"
  , "https://github.com/shinntype/bellefair"
  , "https://github.com/etunni/belleza"
  , "https://github.com/googlefonts/BevanFont.git"
  , "https://github.com/10four/Bhavuka.git"
  , "https://github.com/typeoff/biryani"
  , "https://github.com/solmatas/Bitter"
  , "https://github.com/cyrealtype/Bonbon"
  , "https://github.com/cyrealtype/Brawler"
  , "https://github.com/djrrb/Bungee"
  , "https://github.com/impallari/Cabin.git"
  , "https://github.com/impallari/CabinSketch"
  , "https://github.com/Gue3bara/Cairo"
  , "https://github.com/anexasajoop/cambay.git"
  , "https://github.com/GNOME/cantarell-fonts"
  , "https://github.com/googlefonts/CardoFont"
  , "https://github.com/VanillaandCream/Catamaran"
  , "https://github.com/etunni/Changa"
  , "https://github.com/etunni/changa-one"
  , "https://github.com/Omnibus-Type/Chivo"
  , "https://github.com/cadsondemak/chonburi.git"
  , "https://github.com/vernnobile/CodaFont"
  , "https://github.com/alexeiva/comfortaa"
  , "https://github.com/CatharsisFonts/Cormorant.git"
  , "https://github.com/librefonts/courgette"
  , "https://github.com/vernnobile/coustardFont"
  , "https://github.com/alexeiva/cuprum"
  , "https://github.com/googlefonts/CutiveFont.git"
  , "https://github.com/impallari/DancingScript"
  , "https://github.com/meirsadan/david-libre"
  , "https://github.com/EbenSorkin/Dekko.git"
  , "https://github.com/vernnobile/DhyanaFont"
  , "https://github.com/ossobuffo/didact-gothic"
  , "https://github.com/elms-/Dinah"
  , "https://github.com/etunni/diplomata"
  , "https://github.com/khaledhosny/sahl-naskh"
  , "https://github.com/googlefonts/MuktaGFVersion.git"
  , "https://github.com/Gue3bara/El-Messiri"
  , "https://github.com/impallari/Encode-Sans"
  , "https://github.com/NDISCOVER/Exo-1.0"
  , "https://github.com/etunni/fauna-one"
  , "https://github.com/cyrealtype/Federant.git"
  , "https://github.com/cyrealtype/Federo"
  , "https://github.com/googlefonts/FiraGFVersion.git"
  , "https://github.com/googlefonts/francoisoneFont.git"
  , "https://github.com/etunni/Gabriela"
  , "https://github.com/etunni/gilda-display"
  , "https://github.com/etunni/glegoo.git"
  , "https://github.com/etunni/graduate"
  , "https://github.com/googlefonts/GreatVibesFont"
  , "https://github.com/googlefonts/Homenaje.git"
  , "https://github.com/cyrealtype/Iceberg"
  , "https://github.com/cyrealtype/Iceland"
  , "https://github.com/etunni/imprima"
  , "https://github.com/cyrealtype/Inconsolata"
  , "https://github.com/googlefonts/indieflower.git"
  , "https://github.com/clauseggers/Inknut-Antiqua.git"
  , "https://github.com/cadsondemak/itim.git"
  , "https://github.com/cyrealtype/Jacques-Francois"
  , "https://github.com/cyrealtype/Jacques-Francois-Shadow"
  , "https://github.com/etunni/julee"
  , "https://github.com/cyrealtype/Junge"
  , "https://github.com/ossobuffo/jura"
  , "https://github.com/solmatas/Kadwa"
  , "https://github.com/vernnobile/kameronFont"
  , "https://github.com/cadsondemak/kanit.git"
  , "https://github.com/itfoundry/karma"
  , "https://github.com/EbenSorkin/Kavoon.git"
  , "https://github.com/erinmclaughlin/Khula.git"
  , "https://github.com/etunni/Kite-One"
  , "https://github.com/theleagueof/knewave"
  , "https://github.com/etunni/kurale.git"
  , "https://github.com/itfoundry/laila"
  , "https://github.com/appajid/lakkireddy"
  , "https://github.com/BornaIz/Lalezar"
  , "https://github.com/antonxheight/Lancelot"
  , "https://github.com/silnrsi/font-lateef"
  , "https://github.com/googlefonts/LatoGFVersion.git"
  , "https://github.com/etunni/lemon"
  , "https://github.com/Gue3bara/Lemonada"
  , "https://github.com/impallari/Libre-Baskerville"
  , "https://github.com/impallari/Libre-Caslon-Text"
  , "https://github.com/impallari/Libre-Caslon-Display"
  , "https://github.com/googlefonts/LiterataFont"
  , "https://github.com/impallari/The-Lobster-Font"
  , "https://github.com/pravins/lohit"
  , "https://github.com/cyrealtype/Lora-Cyrillic"
  , "https://github.com/vernnobile/MakoFont"
  , "https://github.com/vahanhovh/mardoto"
  , "https://github.com/cyrealtype/Marko-One"
  , "https://github.com/cyrealtype/Marmelad-Cyrillic"
  , "https://github.com/typeoff/martel"
  , "https://github.com/typeoff/martel_sans"
  , "https://github.com/etunni/mate"
  , "https://github.com/googlefonts/mavenproFont.git"
  , "https://github.com/etunni/merienda"
  , "https://github.com/EbenSorkin/Merriweather"
  , "https://github.com/googlefonts/MetrophobicFont.git"
  , "https://github.com/vernnobile/Michroma-font"
  , "https://github.com/impallari/Miltonian"
  , "https://github.com/JulietaUla/Montserrat"
  , "https://github.com/googlefonts/MuliFont.git"
  , "https://github.com/googlefonts/NunitoFont"
  , "https://github.com/etunni/offside"
  , "https://github.com/theleagueof/orbitron"
  , "https://github.com/etunni/orienta"
  , "https://github.com/googlefonts/OswaldFont"
  , "https://github.com/m4rc1e/OverpassGFVersion"
  , "https://github.com/KDE/oxygen-fonts"
  , "https://github.com/Fonthausen/Pacifico"
  , "https://github.com/VanillaandCream/Palanquin"
  , "https://github.com/googlefonts/pangolin.git"
  , "https://github.com/etunni/paprika"
  , "https://github.com/etunni/pathway-gothic-one"
  , "https://github.com/m4rc1e/PatrickHandSC"
  , "https://github.com/alexeiva/philosopher"
  , "https://github.com/alexeiva/play"
  , "https://github.com/clauseggers/Playfair-Display"
  , "https://github.com/cyrealtype/Podkova"
  , "https://github.com/alexeiva/poiretone.git"
  , "https://github.com/itfoundry/poppins"
  , "https://github.com/Omnibus-Type/PragatiNarrow"
  , "https://github.com/cyrealtype/Prata"
  , "https://github.com/theleagueof/prociono"
  , "https://github.com/cadsondemak/prompt"
  , "https://github.com/jasperdewaard/Proza-Libre"
  , "https://github.com/graphicore/Questrial-Font"
  , "https://github.com/andrew-paglinawan/QuicksandFamily.git"
  , "https://github.com/googlefonts/RadleyFont"
  , "https://github.com/itfoundry/rajdhani"
  , "https://github.com/zeynepakay/Rakkas"
  , "https://github.com/impallari/Raleway.git"
  , "https://github.com/antonxheight/Ranga"
  , "https://github.com/christiannaths/Redacted-Font.git"
  , "https://github.com/DunwichType/RhodiumLibre.git"
  , "https://github.com/googlefonts/RokkittFont.git"
  , "https://github.com/googlefonts/rubik.git"
  , "https://github.com/alexeiva/rubikmonoone"
  , "https://github.com/googlefonts/SacramentoFont"
  , "https://github.com/juandelperal/sahitya"
  , "https://github.com/Omnibus-Type/Sansita"
  , "https://github.com/huertatipografica/sarala.git"
  , "https://github.com/googlefonts/scada.git"
  , "https://github.com/googlefonts/sigmarone.git"
  , "https://github.com/etunni/sintony"
  , "https://github.com/cyrealtype/Sirin-Stencil"
  , "https://github.com/TiroTypeworks/Slabo"
  , "https://github.com/theleagueof/sniglet"
  , "https://github.com/theleagueof/sorts-mill-goudy"
  , "https://github.com/googlefonts/SourceSerifProGFVersion.git"
  , "https://github.com/googlefonts/spacemono.git"
  , "https://github.com/cadsondemak/sriracha.git"
  , "https://github.com/etunni/strait"
  , "https://github.com/cyrealtype/Sumana.git"
  , "https://github.com/huertatipografica/sura.git"
  , "https://github.com/cadsondemak/taviraj"
  , "https://github.com/itfoundry/teko"
  , "https://github.com/appajid/timmana"
  , "https://github.com/cadsondemak/trirong"
  , "https://github.com/vernnobile/TrocchiFont"
  , "https://github.com/etunni/unlock"
  , "https://github.com/Omnibus-Type/Unna"
  , "https://github.com/EbenSorkin/Vampiro"
  , "https://github.com/alefalefalef/Varela-Round-Hebrew.git"
  , "https://github.com/EbenSorkin/Varta.git"
  , "https://github.com/motaitalic/vesper-libre"
  , "https://github.com/librefonts/vibur"
  , "https://github.com/cyrealtype/Vidaloka"
  , "https://github.com/cyrealtype/Volkhov"
  , "https://github.com/FAlthausen/Vollkorn-Typeface"
  , "https://github.com/phoikoi/VT323"
  , "https://github.com/etunni/warnes"
  , "https://github.com/weiweihuanghuang/Work-Sans"
  , "https://github.com/alexeiva/yanone-kaffeesatz"
  , "https://github.com/alexeiva/yesevaone"
  , "https://github.com/librefonts/zeyada"
];

main(queue.slice());