showReposWithSomeFile.js

let Promise = require('bluebird');

function showReposWithSomeFile() {
  gh.request('GET /user/repos')
  .map(repo => {
    let someFileContents = gh.request('GET /repos/:owner/:repo/contents/:path', {
       owner: repo.owner.login,
       repo: repo.name,
       path: 'someFile',
     });
     return {
       someFileContents,
       repo: {
         name: repo.name,
         owner: repo.owner.login
       }
     }
  })
  .filter([someFileContents, repo] => {
    return appHubFileContents.state === 'fulfilled';
  })
  .each(repo => {
    // Do something with the repos that have 'someFile' in them.
  })
  .catch(next);  
}

function showReposWithSomeFile() {
  gh.request('GET /user/repos')
  .map(repo => {
    return gh.request('GET /repos/:owner/:repo/contents/:path', {
       owner: repo.owner.login,
       repo: repo.name,
       path: 'someFile',
     }).then(contents => ({
        repo: repo.name,
        owner: repo.owner.login,
        contents: contents
     })).reflect();
  })
  .filter(promise => promise.isFulfilled())
  .map(promise => promise.value())
  .each(data => {
    // contents = data.contents
    // repo = data.repo
    // etc
  })
  .catch(next);  
}