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blog/2023-08-23-happy-birthday-nushell-4.md

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+---
+title: Celebrating 4 years of Nushell
+author: The Nu Authors
+author_site: https://twitter.com/nu_shell
+author_image: https://www.nushell.sh/blog/images/nu_logo.png
+excerpt: Today, we're celebrating 4 years since Nushell's first public release.
+---
+
+# Nushell turns 4 years old!
+
+Today marks 4 years since Nushell's [first public release](https://www.nushell.sh/blog/2019-08-23-introducing-nushell.html). In that time, Nushell has grown and changed, while always staying true to the idea that started it all: being a structure data language and shell.
+
+To celebrate, we thought we'd share stories of how people are using Nushell today.
+
+## Watching for database changes (Reilly)
+
+- in a loop, clear the screen, do something like `open app.db | get some_table`, and then `sleep` a few seconds to provide an auto-updating "dashboard" of what's going on in a SQLite database
+- use `watch` to run a SQLite command whenever a .sql file changes - kinda like a poor man's SQLite IDE
+
+## Using a `grid` when you `cd` (fdncred)
+
+"I have it in a custom command name lsg and then in my env_change hook on the PWD env var, I call print (lsg). So, every time I cd, lsg gets ran for whatever directory I'm cd'ing to, automatically."
+
+Using `ls | sort-by type name -i | grid -c`, it looks like this:
+
+![Grid showing pretty sorted items with pretty colours](../assets/images/bday_4_grid.png)
+
+## Converting SVG to PDF in bulk (sholderbach)
+
+"Converting SVG drawings and figures to PDFs in bulk. I like how explicit and clean that is compared to a solution with xargs in bash"
+
+![Highlighted source converting files using path parse, where, and inkspace](../assets/images/bday_4_bulk_convert.jpeg)
+
+## Gotta have a Chuck Norris joke
+
+```nushell
+> (http get https://api.chucknorris.io/jokes/random).value
+```
+
+## Surprise, we support script subcommands (jt)
+
+"Turns out, we already support subcommands in scripts."
+
+```
+# adds 100 to the argument
+def "main foo" [
+  x: int # the amount to start with
+] {
+  print ($x + 100)
+}
+
+def "main" [] {
+  print "usage: maintest.nu <command name>"
+}
+```
+
+```
+> nu ../maintest.nu foo 123
+223
+```
+
+It even comes with its own help
+![automated help generated for the script subcommand](../assets/images/bday_4_subcommand_help.png)
+
+## Crossplatform simlinks (Kubouch)
+
+"Here is my favorite: Cross-platform symlink:"
+
+```nushell
+# Create a symlink
+export def symlink [
+    existing: path   # The existing file
+    link_name: path  # The name of the symlink
+] {
+    let existing = ($existing | path expand -s)
+    let link_name = ($link_name | path expand)
+
+    if $nu.os-info.family == 'windows' {
+        if ($existing | path type) == 'dir' {
+            mklink /D $link_name $existing
+        } else {
+            mklink $link_name $existing
+        }
+    } else {
+        ln -s $existing $link_name | ignore
+    }
+}
+```
+
+## Giving your hex values some color (fdncred)
+
+add `string: {|x| if $x =~ '^#[a-fA-F\d]+' { $x } else { 'white' } }` to your `$env.config.color_config` and you'll get:
+
+![screenshot showing each hex value colored to match the color of that hex value](../assets/images/bday_4_hex_colours.png)
+
+# And many more
+
+We've hope you all have enjoyed using Nushell as much as we've enjoyed making. Here's to many more happy birthdays to come!