App not compatible with buildpack - Heroku

Question

When I run git push heroku master this is what I get:

C:\Users\Emanuele-PC\Desktop\project-mm-beta>git push heroku master
Counting objects: 3, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (2/2), done.
Writing objects: 100% (3/3), 505 bytes | 0 bytes/s, done.
Total 3 (delta 0), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> App not compatible with buildpack: https://codon-buildpacks.s3.amazonaws.com/buildpacks/heroku/python.tgz
remote:        More info: https://devcenter.heroku.com/articles/buildpacks#detection-failure
remote:
remote:  !     Push failed
remote: Verifying deploy...
remote:
remote: !       Push rejected to project-mm-beta.
remote:
To https://git.heroku.com/project-mm-beta.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/project-mm-beta.git'

The code I am trying to deploy is just one file (it's a test because it's my first time using Heroku) and it's written in Python. I have already set the buildpack (python) but it still doesn't work. How can I solve?

You need to include a `requirements.txt` file. It can be empty. https://devcenter.heroku.com/articles/python-runtimes#activation-1 — brennan, Sep 08 '17 at 06:01
There is only this error: `2017-09-08T06:18:27.000000+00:00 app[api]: Build failed -- check your build logs` repeating at different times (only this type of error, no other one). But I think it's related to "App not compatible with buildpack". — BobbyJ, Sep 08 '17 at 06:22
Maybe add a Procfile like https://stackoverflow.com/a/44854965/6085135 — brennan, Sep 08 '17 at 06:28
Solved. I created a new app and I followed all the steps again (the previous one has US as country when I am in EU, I don't know if that could have been one of the reason. Thanks for the help anyway. — BobbyJ, Sep 08 '17 at 06:47
Glad it's working, if it happens again maybe `git push -f heroku master` https://stackoverflow.com/questions/9794413/failed-to-push-some-refs-to-githeroku-com — brennan, Sep 08 '17 at 06:52
I totally got same error when my branch `master` on github does not have any files (ex. package.json ...), so when i typed `git push heroku master`, it did not detect any files for building and pushing them (ex. can not find package.json). Therefore, after i pushed files to github, and typed `git push heroku master` success for release. — Huy Tower, Oct 30 '18 at 03:00
Make sure that your buildpack is set correctly check out the docs for heroku https://devcenter.heroku.com/articles/buildpacks#officially-supported-buildpacks — Box and Cox, Oct 11 '17 at 17:22
after you do pip freeze>requirements.txt, don't forget to git add . and git commit -m "added requirements.txt". Only then try again with git push heroku master — Tms91, Feb 26 '20 at 23:35

score 56 · Answer 1 · edited Aug 16 '22 at 18:50

56

The Heroku Python Support will be applied to applications only when the application has a Pipfile, setup.py, or requirements.txt in the root directory.

Visit the documentation to get detailed instructions.

edited Aug 16 '22 at 18:50

ChrisGPT was on strike

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answered Aug 20 '18 at 12:54

Steev James

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Ruifeng Ma · Answer 2 · 2019-12-17T04:43:39.350

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I just found out... It's quite a silly issue. Make sure the git repo is initialized within the project root folder. Suppose the project is a Django app and the project folder created by Django is my-project, the git repo needs to be initialized right within my-project for Heroku to work...

edited Dec 17 '19 at 04:43

answered Jul 01 '18 at 08:19

Ruifeng Ma

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What do you mean by repo needs to be 'initialized' within the root. I know where the root is, but not what you mean by initializing a git repo within a particular folder. – Charley Erd Dec 16 '19 at 01:10
I meant project root folder. I explained with a `my-project` example as well. – Ruifeng Ma Dec 17 '19 at 04:43
i am building flask applicatoin and didn't work for me – narengs7 May 10 '20 at 05:35
same happened to me – jed Aug 06 '21 at 03:55

score 16 · Answer 3 · edited Aug 16 '22 at 18:52

16

Add Pipfile and Procfile, and commit them. This solved it for me.

You can see the files I am speaking of on this Heroku documentation.

And here is a link to Heroku's Python buildpack on GitHub.

edited Aug 16 '22 at 18:52

ChrisGPT was on strike

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answered May 09 '18 at 20:46

amir_salar

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*slaps forehead* Forgot to commit, lost half an hour. – Mathieu Dhondt Apr 22 '20 at 15:16

score 7 · Answer 4 · answered Feb 18 '21 at 23:32

7

You can try doing:

pip3 freeze > requirements.txt
heroku buildpacks:set heroku/python
git add .; git commit -m "add requirements.txt"; git push heroku master

Note: Make sure you're in your root directory of your Python project :)

answered Feb 18 '21 at 23:32

Josh Arnold

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score 4 · Answer 5 · answered Mar 05 '20 at 18:21

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try add a file named requirement.txt and enter anything you need like django

answered Mar 05 '20 at 18:21

Shi Bo-kai

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The OP noted in the comments that this error persists ever when a `requirements.txt` file is present. – Brian61354270 Mar 05 '20 at 18:51

score 3 · Answer 6 · answered Mar 03 '19 at 16:24

Step 1) First setup the buildpack (programming-language )

For example : heroku buildpacks:set heroku/nodejs

Check for more info here : https://devcenter.heroku.com/articles/buildpacks

If the issue still exists, then follow next step

Step 2) git init and currently used directory is different, so this error is still thrown "App not compatible with buildpack:"

For example : git init command was used executed at :- C:/sample_folder/

But modules and package.json is under nested sub-folder :-

C:/sample_folder/nodejs_app/package.json

So move the files accordingly such that all the file are present under the same folder and then run

git push heroku master

--happy coding!

This is extremely helpful; this was the only post which contained the stuff about "you have to make sure you're git is in the right spot." +1. — The Daleks stand with Ukraine, Jan 27 '20 at 01:40

score 2 · Answer 7 · answered Jan 02 '20 at 11:55

I was getting this error because I was making changes to a different branch. So I was working of a feature branch, then running git push heroku master. My changes had not been merged into my master branch, so thus the error. Once I merged in the Procfile to master I was able to push the changes up to heroku.

score 2 · Answer 8 · edited Jan 15 '21 at 10:25

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First file: requirements.txt

containing something like: gunicorn==19.7.1 or whatever the results of pip freeze > requirements.txt are.

Second file: Procfile

containing something like: web: gunicorn app:app or potentially blank. Note that app:app in this example is a reference to your python filename. It means that every time a web process is declared, and a dyno of this type is started, also run the command gunicorn app:app to start your web server.

Then git add . and git commit -m "added Procfile and requirements.txt".

Then run git push heroku master to push from your local master branch to the heroku remote.

edited Jan 15 '21 at 10:25

Daemon Painter

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answered Jun 21 '20 at 13:14

Suseel Suhang

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It's great that you have answered the question, but can you please explain it more clearly? One way of making this more clearer is by formatting things as code. You can do this by using backticks `\`` – programmerRaj Jun 21 '20 at 13:31

score 2 · Answer 9 · answered Jul 14 '20 at 16:21

I was having the same error because I was not committing the files, make sure you run the command git add . then git commit -m'message' after changing any file, and then you can run git push heroku master and also add the requirements.txt and Procfile correctly.

score 2 · Answer 10 · answered Jul 17 '21 at 07:58

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I had the same issue. Just make sure that you initialized the git repo inside the django project root. That way, your .git folder, .gitignore file, manage.py, requirements.txt, etc.. are on the same hierarchical level.

answered Jul 17 '21 at 07:58

Emeruche

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This solution worked for me – Haider Ali J Al-Rustem Sep 21 '21 at 03:47

score 1 · Answer 11 · answered Dec 22 '18 at 09:43

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You can specify the buildpack for python by this method

CLI Installation

heroku buildpacks:set https://github.com/heroku/heroku-buildpack-python.git

answered Dec 22 '18 at 09:43

Sumithran

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score 1 · Answer 12 · answered Oct 01 '20 at 13:01

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Finally make sure you're not ignoring requirements.txt from your .gitignore, That was my problem.

answered Oct 01 '20 at 13:01

Mwthreex

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score 1 · Answer 13 · answered Sep 06 '21 at 20:43

-> Make sure your requirements.txt & Procfile are in the root folder.

-> run following commands if you are not in the master branch already.

git checkout -b master
git add .
git commit -m "your commit message"
git push -u origin master
git push heroku master

Tms91 · Answer 14 · 2020-06-22T07:17:36.550

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Check if you did the following steps:

Activate your virtual environment.
Run on your command prompt:
pip freeze>requirements.txt
Add Procfile in your main app directory (the same where manage.py is);
inside Procfile you should insert:
web: gunicorn your_app_name.wsgi

edited Jun 22 '20 at 07:17

answered Jun 11 '20 at 14:21

Tms91

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Oops, you misspelled the `requirements.txt` – Thomas LAURENT Jun 21 '20 at 22:35

score 0 · Answer 15 · edited Dec 22 '20 at 21:32

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Well, same happened to me while I was creating a first-time Heroku app. Just add requirements.txt. It will work fine.

edited Dec 22 '20 at 21:32

Shankar Ganesh Jayaraman

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answered Dec 22 '20 at 08:13

Mystery Boy

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score 0 · Answer 16 · answered Nov 21 '21 at 12:38

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I just removed README.md from my GitHub repository which was connected to my Heroku app, and that worked for me!

answered Nov 21 '21 at 12:38

Raza ul Mustafa

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score 0 · Answer 17 · answered Dec 01 '21 at 14:46

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Check whether you have written correct spelling of Procfile and requirements.txt, because they are case sensitive and In my case after changing the procfile to Procfile it started working properly.

answered Dec 01 '21 at 14:46

Rjraj

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score -2 · Answer 18 · edited Apr 02 '18 at 00:48

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Run this command:

heroku buildpacks:set heroku/python

Also you can refer this document.

edited Apr 02 '18 at 00:48

Stephen Rauch

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answered Apr 02 '18 at 00:30

Jyoti S

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This just says: `The buildpack heroku/python is already set on your app.` – AnnanFay Apr 23 '18 at 13:22

App not compatible with buildpack - Heroku

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