Add Interactively Switch asdf Package Versions as a Unix TIL

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1383 TILs and counting..._
+_1384 TILs and counting..._
 
 ---
 
@@ -1351,6 +1351,7 @@ _1383 TILs and counting..._
 - [Ignore A Directory During ripgrep Search](unix/ignore-a-directory-during-ripgrep-search.md)
 - [Ignore The Alias When Running A Command](unix/ignore-the-alias-when-running-a-command.md)
 - [Interactively Browse Available Node Versions](unix/interactively-browse-availabile-node-versions.md)
+- [Interactively Switch asdf Package Versions](unix/interactively-switch-asdf-package-versions.md)
 - [Jump To The Ends Of Your Shell History](unix/jump-to-the-ends-of-your-shell-history.md)
 - [Kill Everything Running On A Certain Port](unix/kill-everything-running-on-a-certain-port.md)
 - [Killing A Frozen SSH Session](unix/killing-a-frozen-ssh-session.md)

unix/interactively-switch-asdf-package-versions.md

@@ -0,0 +1,30 @@
+# Interactively Switch asdf Package Versions
+
+I use [`asdf`](https://asdf-vm.com/) to manage versions for a couple different
+languages that I use across projects. I mostly use it for `node` and `ruby`.
+
+When setting up a new project or needing to set the version for an existing
+one, I run some version of:
+
+```bash
+$ asdf local nodejs <some-version-here>
+```
+
+But before I can do that, I need to figure out what versions I have installed
+(`asdf list nodejs`), so I end up running two commands and having to remember
+the nuances of the sub-commands for each.
+
+I decided to make this small interaction easier by making it _interactive_ with
+[`fzf`](https://github.com/junegunn/fzf).
+
+```bash
+asdf local nodejs $(
+  asdf list nodejs | fzf | xargs | sed 's/^\*//'
+)
+```
+
+This grabs the list of installed `nodejs` versions, turns it into an
+interactive list with `fzf`, and then passes my selection to `asdf local` to
+set that version.
+
+I can substitute `ruby` for `nodejs` to do the same thing for Ruby versions.