ruby - 在 Heroku 上部署，如何指定用于 bundler 的 ruby​​ 版本？

Question

Heroku 最近发生了一些变化。我无法像以前那样部署我的应用程序:

me@host my-project (master) $ git push staging master
Counting objects: 52, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (51/51), done.
Writing objects: 100% (52/52), 159.47 KiB | 0 bytes/s, done.
Total 52 (delta 42), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote: 
remote: -----> Deleting 4 files matching .slugignore patterns.
remote: -----> Ruby app detected
remote: -----> Compiling Ruby/Rails
remote: -----> Using Ruby version: ruby-2.3.0
remote: -----> Installing dependencies using bundler 1.13.6
remote:        Your app was upgraded to bundler 1.13.6.
remote:        Previously you had a successful deploy with bundler 1.11.2.
remote:        
remote:        If you see problems related to the bundler version please refer to:
remote:        https://devcenter.heroku.com/articles/bundler-version
remote:        Ruby version change detected. Clearing bundler cache.
remote:        Old: ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-linux]
remote:        New: ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-linux]
remote:        Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin -j4 --deployment
remote:        Your Ruby version is 2.3.0, but your Gemfile specified 2.2.0
remote:        Bundler Output: Your Ruby version is 2.3.0, but your Gemfile specified 2.2.0
remote:  !
remote:  !     Failed to install gems via Bundler.
remote:  !
remote:  !     Push rejected, failed to compile Ruby app.
remote: 
remote:  !     Push failed
remote: Verifying deploy...
remote: 
remote: ! Push rejected to my-project-staging.
remote: 
To https://git.heroku.com/my-project-staging.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/my-project-staging.git'

我不明白，我从一开始就在使用 ruby 2.2.0:

me@host my-project (master) $ ruby -v
ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-darwin14]

me@host my-project (master) $ cat .ruby-version 
2.2.0

me@host my-project (master) $ cat Gemfile | grep 'ruby'
ruby '2.2.0'

我不知道如何告诉 bundler 我仍在使用 ruby​​ 2.2.0。我的 bundler 在底部有这个:

RUBY VERSION
   ruby 2.3.0p0

BUNDLED WITH
   1.12.1

---

为什么bundler没有使用ruby 2.2.0版本？它使用的是 2.3.0...

Answer 1

检查你的 Gemfile.lock。最新版本的 bundler 添加了用于安装 gems(并生成 Gemfile.lock)的 ruby​​ 版本和 bundler 版本。

在底部你会发现:

RUBY VERSION
   ruby 2.3.0 

BUNDLED WITH
   1.13.1 # or whatever version of bundler you're using

删除它，然后使用正确版本的 ruby​​ 重新运行 bundle install - 您可能需要删除 + 重新添加 gem 以触发 Gemfile.lock 文件的重新构建。