Updating Gemfile.lock without installing gems
Run bundle lock --update.
I found an answer in a blog post by Chris Blunt: “Rails on Docker: Quickly Create or Update Your Gemfile.lock”:
Today, I discovered a way to save the hours wasted downloading gems: bundler’s lock command.
This gem of a command resolves your app’s dependencies and writes out the appropriate
Gemfile.lock– without installing any of the gems themselves.
According to the changelog, this command was added in Bundler 1.10.0.pre, released about eight months after this question was asked.
Instead of
bundle installdo the following:
bundle lockThis will just update the Gemfile.lock, but not attempt to install the files locally. If you want to prepare a Gemfile.lock for a remote or deployment platform you must add it using
bundle lock --add-platform ...Latest docs at https://bundler.io/v1.16/man/bundle-lock.1.html