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I was pushing the current git repository into the heroku. That online application was developed using Scala and IntelliJ. And I don't know how to fix this error.
$ git push heroku master Counting objects: 3, done. Delta compression using up to 4 threads. Compressing objects: 100% (3/3), done. Writing objects: 100% (3/3), 531 bytes | 0 bytes/s, done. Total 3 (delta 0), reused 0 (delta 0) remote: Compressing source files... done. remote: Building source: remote: remote: ! No default language could be detected for this app. remote: HINT: This occurs when Heroku cannot detect the buildpack to use for this application automatically. remote: See https://devcenter.heroku.com/articles/buildpacks remote: remote: ! Push failed remote: Verifying deploy.... remote: remote: ! Push rejected to salty-coast-14102. remote: To https://git.heroku.com/salty-coast-14102.git ! [remote rejected] master -> master (pre-receive hook declined) error: failed to push some refs to 'https://git.heroku.com/salty-coast-14102.git' 
465
This error means that the upstream repository has made commits that would be lost if you were to push. First do a "git pull" to merge, and then push again.
To deploy your app to Heroku, use the git push command to push the code from your local repository's main branch to your heroku remote. For example: $ git push heroku main Initializing repository, done.
You can use https://github.com/ddollar/heroku-push and push directories without git.
Read this doc which will explain to you what to do.
https://devcenter.heroku.com/articles/buildpacks
Setting a buildpack on an application
You can change the buildpack used by an application by setting the buildpack value.
When the application is next pushed, the new buildpack will be used.$ heroku buildpacks:set heroku/phpBuildpack set. Next release on random-app-1234 will use heroku/php.
Rungit push heroku masterto create a new release using this buildpack.
This is whay its not working for you since you did not set it up.
... When the application is next pushed, the new buildpack will be used.
You may also specify a buildpack during app creation:
$ heroku create myapp --buildpack heroku/python There has to be a .git directory in the root of your project.
If you don't see that directory run git init and then re-associate your remote.
Like so:
heroku git:remote -a herokuAppName git push heroku master If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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