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POShould I check in node_modules to git when creating a node.js app on Heroku?
 

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  1. POShould I check in node_modules to git when creating a node.js app on Heroku?
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    <p>I followed the basic getting started instructions for node.js on Heroku here:</p> <p><a href="https://devcenter.heroku.com/categories/nodejs" rel="noreferrer">https://devcenter.heroku.com/categories/nodejs</a></p> <p>These instruction don't tell you to create a .gitignore node_modules, and therefore imply that node_modules should be checked in to git. When I include node_modules in git my getting started application ran correctly.</p> <p>When I followed the more advanced example at:</p> <p><a href="https://devcenter.heroku.com/articles/realtime-polyglot-app-node-ruby-mongodb-socketio" rel="noreferrer">https://devcenter.heroku.com/articles/realtime-polyglot-app-node-ruby-mongodb-socketio</a> <a href="https://github.com/mongolab/tractorpush-server" rel="noreferrer">https://github.com/mongolab/tractorpush-server</a> (source)</p> <p>It instructed me to add node_modules to .gitignore. So I removed node_modules from git, added it to .gitignore, then re-deployed. This time the deployed failed like so:</p> <pre><code>-----&gt; Heroku receiving push -----&gt; Node.js app detected -----&gt; Resolving engine versions Using Node.js version: 0.8.2 Using npm version: 1.0.106 -----&gt; Fetching Node.js binaries -----&gt; Vendoring node into slug -----&gt; Installing dependencies with npm Error: npm doesn't work with node v0.8.2 Required: node@0.4 || 0.5 || 0.6 at /tmp/node-npm-5iGk/bin/npm-cli.js:57:23 at Object.&lt;anonymous&gt; (/tmp/node-npm-5iGk/bin/npm-cli.js:77:3) at Module._compile (module.js:449:26) at Object.Module._extensions..js (module.js:467:10) at Module.load (module.js:356:32) at Function.Module._load (module.js:312:12) at Module.require (module.js:362:17) at require (module.js:378:17) at Object.&lt;anonymous&gt; (/tmp/node-npm-5iGk/cli.js:2:1) at Module._compile (module.js:449:26) Error: npm doesn't work with node v0.8.2 Required: node@0.4 || 0.5 || 0.6 at /tmp/node-npm-5iGk/bin/npm-cli.js:57:23 at Object.&lt;anonymous&gt; (/tmp/node-npm-5iGk/bin/npm-cli.js:77:3) at Module._compile (module.js:449:26) at Object.Module._extensions..js (module.js:467:10) at Module.load (module.js:356:32) at Function.Module._load (module.js:312:12) at Module.require (module.js:362:17) at require (module.js:378:17) at Object.&lt;anonymous&gt; (/tmp/node-npm-5iGk/cli.js:2:1) at Module._compile (module.js:449:26) Dependencies installed -----&gt; Discovering process types Procfile declares types -&gt; mongod, redis, web -----&gt; Compiled slug size is 5.0MB -----&gt; Launching... done, v9 </code></pre> <p>Running "heroku ps" confirms the crash. Ok, no problem, so I rolled back the change, add node_module back to the git repository and removed it from .gitignore. However, even after reverting, I still get the same error message on deploy but now the application is running correctly again. Running "heroku ps" tells me the application is running.</p> <p>So my question is what's the right way to do this? Include node_modules or not? And why would I still be getting the error message when I rollback? My guess is the git repository is in a bad state on the Heroku side?</p>
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