git, Heroku: pre-receive hook declined

Question

I am in the process of setting up a git repository and attempting to link it to Heroku. When I run the command

git push heroku master

I rec

Answer 1

I had this with a sinatra application. (Heroku does support Sinatra).

The instructions on the heroku blog post were incomplete

https://blog.heroku.com/32_deploy_merb_sinatra_or_any_rack_app_to_heroku

My program ran fine locally but I got that error when trying to push to heroku.

The heroku blogpost didn't include the need to make a gemfile and do bundle install. The program was running locally fine, but to make it work on heroku it needed a Gemfile and bundle install on it.

this link here https://teamtreehouse.com/community/how-can-i-make-my-sinatra-app-public mentioned that I needed a Gemfile, and mentioned the contents of the Gemfile. And then to do bundle install. Then once that is done, then follow the instructions on that heroku blog post, of making the program file, and the config.ru and the git repo and doing heroku create (which also creates the remote), then git push heroku master.

i.e.

Gemfile as mentioned at treehouse link

# define our source to look for gems
source "http://rubygems.org/"

# declare the sinatra dependency
gem "sinatra" 

And bundle install to install that Gemfile.

bundle install

hello.rb (as mentioned on heroku blogpost)

require 'rubygems'
require 'sinatra'

get '/' do
  "Hello from Sinatra on Heroku!"
end

config.ru

require './hello'
run Sinatra::Application

git

$ git init
Initialized empty Git repository in /Users/adam/hello/.git/
$ git add .
$ git commit -m "sinatra and heroku, two great tastes"
[master (root-commit)]: created 93a9e6d: "sinatra and heroku, two great tastes"
 2 files changed, 9 insertions(+), 0 deletions(-)
 create mode 100644 config.ru
 create mode 100644 hello.rb

heroku create

$ heroku create
Created http://severe-spring-77.heroku.com/ | git@heroku.com:severe-spring-77.git
Git remote heroku added

the push to heroku

$ git push heroku master
Counting objects: 4, done.
Compressing objects: 100% (3/3), done.
Writing objects: 100% (4/4), 385 bytes, done.
Total 4 (delta 0), reused 0 (delta 0)

-----> Heroku receiving push
-----> Verifying repository integrity... done, looks like a Rack app.
       Compiled slug size is 0.1MB
-----> Launching....... done
       App deployed to Heroku

To git@heroku.com:severe-spring-77.git
 * [new branch]      master -> master

Answer 2

Make sure you are pushing a repo that contains a proper supported app ( Rails, Django etc.) and you are not just pushing some random repo to test it out.

Newbie in Heroku: Error when push my app to Heroku

If that is not the case and you are pushing what you think is a valid app, contact Heroku support and they will fix it for you.

Answer 3

I faced the same problem:

! [remote rejected] vX.X.XX -> master (pre-receive hook declined) 
error: failed to push some refs to 'git@heroku.com:[application-name]'

I realized that my heroku application Stack is 'cedar-10' and was deprecated from 04/11/2014 and disabled from 04/11/2015 (Cedar-14 is now Generally Available).

The solution was to upgrade the heroku application Stack following the guide:

Upgrading the production app to Cedar-14

Answer 4

I see you already got answers. Let me just share my problem and solution incase it helps anyone else that might make the same mistake I did.

I had this problem, (same error with Heroku)

To https://git.heroku.com/myapp.git
 ! [remote rejected]   master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/myapp.git'

The mistake I made some changes to my code and removed some parameters, apparently I missed a simple comma (,) on a line. This caused a build error. Which was not visible in the console upon pushing, only the "pre-receive hook declined" error.

SOLUTION I fixed the comma issue, rebuild and pushed to Heroku and now it works. I wanted to share this here, so if someone else makes this mistake, they can try this as well instead of waiting for Heroku to reply.

I hope this helps someone.

Answer 5

Make sure that you are using either npm or yarn.lock file-

Two different lockfiles found: package-lock.json and yarn.lock Both npm and yarn have created lockfiles for this application, but only one can be used to install dependencies.

After deleting yarn.lock and pushing the code again to git, my issue resolved.

Answer 6

i thought , this will not be the error occured due to any app , or code changes. i have same problem now this happen due to the following reason:

• 1) i have code on bitbucket/git i push the code to repository (this repo is linked with the heroku app,meanse changes to this will reflects on heroku)

• 2)after pushing code to repo , i am trying to push code on heroku with "git push heroku master" but due to some reason i abort this command, thats why code is not pushed to heroku

• 3)then i am agian triyng to push code to heroku it says same error
  as above

• 4) the solution for this is "just pull yours last commited code" and push the changes to heroku ..thats it thanks