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29 lines
991 B
Markdown
29 lines
991 B
Markdown
# List All Installable Rails Versions
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_Here's a [screencast](https://www.youtube.com/watch?v=IizkvqGLkhU) in case you
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want to watch instead of read._
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I [was curious](https://twitter.com/jbrancha/status/1345467867479875584?s=20)
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what versions of Rails were remotely available to be installed with `gem`. On
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its own, `gem list rails` will show all _locally_ installed gems that
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partially match `rails`. That'll include gems like `rspec-rails` and
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`sprockets-rails`.
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First, the `--exact` flag can be added to narrow down the results to an exact
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match of `rails`.
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Then, the `--remote` flag can be included to request `gem` look for remote
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versions. That is, versions available on the rubygems server.
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Lastly, the `--all` flag can be included to fetch all versions instead of only
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the latest version.
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Putting it all together:
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```bash
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$ gem list rails --exact --remote --all
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rails (6.1.0, 6.0.3.4, 6.0.3.3, ... 0.9.0, 0.8.5, 0.8.0)
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```
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[source](https://stackoverflow.com/a/9146057/535590)
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