runtime.txt应该在部署到Heroku之前进行git提交吗？
我目前有一个runtime.txt已正确填充(python-3.8.6(，但当我运行git push heroku master:时，它似乎被忽略了
$ git push heroku master -v
Pushing to https://git.heroku.com/my-app-xxxx.git
Enumerating objects: 8, done.
Counting objects: 100% (8/8), done.
Delta compression using up to 4 threads
Compressing objects: 100% (6/6), done.
Writing objects: 100% (6/6), 890 bytes | 890.00 KiB/s, done.
Total 6 (delta 4), reused 0 (delta 0)
POST git-receive-pack (1059 bytes)
remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> Python app detected
remote: ! Requested runtime (python-3.7.5) is not available for this stack (heroku-20).
remote: ! Aborting. More info: https://devcenter.heroku.com/articles/python-support
remote: ! Push rejected, failed to compile Python app.
remote:
remote: ! Push failed
remote: !
remote: ! ## Warning - The same version of this code has already been built: 2bb6cb469f45a6165948a97c6ef8exxxxx
remote: !
remote: ! We have detected that you have triggered a build from source code with version 2bb6cb469f45a6165948a97c6ef8exxxxx
remote: ! at least twice. One common cause of this behavior is attempting to deploy code from a different branch.
[...]
尽管：
$ cat runtime.txt
python-3.8.6
供参考：
$ git status
On branch master
Your branch is up to date with 'origin/master'.
Untracked files:
(use "git add <file>..." to include in what will be committed)
.vscode/
__pycache__/my-app-xxxx.cpython-38.pyc
runtime.txt
响应：是的，runtime.txt显然不是在Heroku CLI级别处理的，而是在服务器端处理的，因此必须将其考虑在内。