I git cloned a Node.js application (the version specified in the package.json
being 4.1.2
and that of my local machine being 6.2.2
) and tried to git push on Heroku. But it failed to build and gave this error:
Failed to detect set buildpack https://codon-buildpacks.s3.amazonaws&periodcom/buildpacks/heroku/nodejs.tgz
Now I set the buildpack to heroku/nodejs and I get this message:
Buildpack set. Next release on lit-badlands-92088 will use heroku/nodejs.
Run git push heroku master to create a new release using this buildpack.
Now when I run git push heroku master
, I am again told:
remote: -----> Failed to detect set buildpack
https://codon-buildpacks.s3.amazonaws.com/buildpacks/heroku/nodejs.tgz
remote: More info:
https://devcenter.heroku.com/articles/buildpacks#detection-failure
remote:
remote: ! Push failed
remote: Verifying deploy...
remote:
remote: ! Push rejected to lit-badlands-92088.
What could be the possible reasons for the Node.js buildpack not being detected even if I set it?
This means that a package.json
file isn't checked into the root of your git project, so Heroku is detecting that it isn't a Node.js app. You can see this locally:
git show master:package.json
To fix it, you'll want to be sure there is a package.json in the root of your project (where there is also a .git directory), and add it to git:
git add package.json
git commit -m 'track package.json'
The phrasing ('failed to detect set buildpack') could be improved. It should probably say 'failed to detect Node.js app'. When the buildpack's "detect" script is run (https://github.com/heroku/heroku-buildpack-nodejs/blob/master/bin/detect), it looks for a package.json file to verify that there's a node app available to build.