使用Node Js的Heroku调度程序

Question

I've followed this answer here and it works but when I try to call my app nothing happens. I have my main function in app.js called

function start() { ... }

This is my task stored in bin which I know it works when I call:

#! /app/.heroku/node/bin/node
function mytask() {
  start();
}
initScrape();
process.exit();

After: heroku run init mytask

λ heroku run init_scrape                                 
Running mytask on dyno1... up, run.5157   
/app/bin/mytask:3                                   
  start();                                               
  ^                                                      

ReferenceError: start is not defined                     
    at mytask (/app/bin/mytask:3:3)             
    at Object.<anonymous> (/app/bin/mytask:5:1)     
    at Module._compile (module.js:413:34)                
    at Object.Module._extensions..js (module.js:422:10)  
    at Module.load (module.js:357:32)                    
    at Function.Module._load (module.js:314:12)          
    at Function.Module.runMain (module.js:447:10)        
    at startup (node.js:148:18)                          
    at node.js:405:3                                     

Answer 1

You need to export start from where it is defined and your script needs to require the file that has start() defined. Otherwise how would it know where to find it?

So you probably need to modify your app.js and say module.exports = start . Then in the mytask file you do this:

#! /app/.heroku/node/bin/node
var start = require('./app.js');
function mytask() {
  start();
}
initScrape();
process.exit();