--default option of gem command will not install the library files. I think you can use the bundler-1.x with simply gem install bundler -v 1.17.3. After that, The bundler switcher of RubyGems can detect the old version of bundler automatically.
Thanks for the comment! But I just tried it with freshly installed Ruby 2.7.1 and it didn't work 🤔
First, I made sure I only have the default bundler 2.1.4. And then I installed version 1.17.3
$ ruby -v
ruby 2.7.1p83 (2020-03-31 revision a0c7c23c9c) [x86_64-darwin19]
$ gem list bundler
*** LOCAL GEMS ***
bundler (default: 2.1.4)
$ gem install bundler -v 1.17.3 Fetching bundler-1.17.3.gem
Successfully installed bundler-1.17.3
Parsing documentation for bundler-1.17.3
Installing ri documentation for bundler-1.17.3
Done installing documentation for bundler after 2 seconds
1 gem installed
$ gem list bundler
*** LOCAL GEMS ***
bundler (default: 2.1.4, 1.17.3)
But after installing version 1.17.3 it still uses 2.1.4, which can't be uninstalled.
$ bundle -v
Bundler version 2.1.4
$ gem uninstall 2.1.4
Gem '2.1.4' is not installed
$ gem uninstall bundler -v 2.1.4
Gem bundler-2.1.4 cannot be uninstalled because it is a default gem
Now if I create a new Gemfile and run bundle install, it'll still use 2.1.4 instead of 1.17.3.
$ echo "source 'https://rubygems.org'" >> Gemfile
$ bundle
The Gemfile specifies no dependencies
Resolving dependencies...
Bundle complete! 0 Gemfile dependencies, 1 gem now installed.
Use `bundle info [gemname]` to see where a bundled gem is installed.
$ cat Gemfile.lock
GEM
remote: https://rubygems.org/
specs:
PLATFORMS
ruby
DEPENDENCIES
BUNDLED WITH
2.1.4
You can use bundler-1.17.3 with bundle __1.17.3__ install. Or After you update 2.1.4 to 1.17.3 on BUNDLED WITH field, You can use bundler-1.17.3 with bundle command.
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--defaultoption of gem command will not install the library files. I think you can use the bundler-1.x with simplygem install bundler -v 1.17.3. After that, The bundler switcher of RubyGems can detect the old version of bundler automatically.Thanks for the comment! But I just tried it with freshly installed Ruby 2.7.1 and it didn't work 🤔
First, I made sure I only have the default bundler
2.1.4. And then I installed version1.17.3But after installing version
1.17.3it still uses2.1.4, which can't be uninstalled.Now if I create a new Gemfile and run bundle install, it'll still use
2.1.4instead of1.17.3.Did I miss anything?
You can use bundler-1.17.3 with
bundle __1.17.3__ install. Or After you update2.1.4to1.17.3onBUNDLED WITHfield, You can use bundler-1.17.3 with bundle command.