In this chapter, you will pin the version numbers of all of the gems in the Gemfile, but you will NOT upgrade any gems just yet.
- Not all of the gems used by your app are listed in the Gemfile. A look at the Gemfile.lock file shows that your app uses many gems beyond those in the Gemfile.
- The process of upgrading gems should be done in a series of small steps instead of one big step. If tests fail, it's easy to identify the culprits when you upgrade the gems in small steps.
Enter the command "git checkout -b 11-01-pinning_gems".
- For each gem listed in the Gemfile, enter the command "gem list (gem name)".
- If you see just one gem version listed, this is the version to specify. Remember, this chapter is about pinning the gem versions. (The upgrading comes later.)
- If you see more than one gem version listed, search through the Gemfile.lock file for the specific version used in the app. This is the version to specify.
- Remember to scroll down through the ENTIRE Gemfile. Yes, this is a long task.
- When you are finished, enter the command "sh git_check.sh". All tests should pass, and there should be no offenses.
- Enter the command "git diff Gemfile.lock". You should see see no major changes.
- Enter the following commands:
git add .
git commit -m "Pinned all gems listed in the Gemfile"
- Enter the command "git push origin 11-01-pinning_gems".
- Go to the GitHub repository and click on the "Compare and pull request" button for this branch.
- Accept this pull request to merge it with the master branch, but do NOT delete this branch.
- Enter the following commands:
git checkout master
git pull
sh heroku.sh