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https://github.com/jbranchaud/til
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34 lines
1.1 KiB
Markdown
34 lines
1.1 KiB
Markdown
# Search For Gem Versions Available To Install
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The [`gem list`](https://guides.rubygems.org/command-reference/#gem-list)
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command combined with a few flags will produce a listing of all available
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versions of that gem like so:
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```bash
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gem list rails --exact --remote --all
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*** REMOTE GEMS ***
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rails (7.1.0, 7.0.8, 7.0.7.2, 7.0.7.1, 7.0.7, ...)
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```
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I can then apply a bit of command-line transformation with `sed` and `tr` to
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turn that list of version numbers into a list that can be nicely consumed by
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other commands. In particular, I will pipe that list to `fzf` so that I can
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fuzzy-search through the huge list for specific version matches.
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```bash
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$ gem list rails --exact --remote --all \
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| sed -n 's/.*(\([^)]*\)).*/\1/p' \
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| tr ',' '\n' \
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| sed 's/^ //' \
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| fzf
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```
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The first `sed` command captures everything inside the parentheses. The `tr`
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command replaces the commas with new lines. And the second `sed` command
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removes those leading space on each line.
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Lastly, [`fzf`](https://github.com/junegunn/fzf) provides a fuzzy-search
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interface over the list of versions.
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