Add update_deps.ps1 (clone computer enhance repo)

scripts/update_deps.ps1

@@ -0,0 +1,25 @@
+# ════════════════════════════════════════════════════════════════════════════
+# update_deps.ps1 — fetch / refresh.
+# ════════════════════════════════════════════════════════════════════════════
+param(
+    [switch] $NoPull # Skip the `git pull` step when the checkout already exists.
+)
+
+$path_root           = split-path -Path $PSScriptRoot -Parent
+$path_course_content = join-path $path_root 'course_content'
+$misc                = join-path $PSScriptRoot 'helpers/misc.ps1'; . $misc
+
+# Halt on any error (instead of PowerShell's default `Continue`).
+$ErrorActionPreference = 'Stop'
+
+
+# --- Dependency Definition ---
+# One external dep for now: Casey Muratori's computer_enhance course repo.
+$url_computer_enhance = 'https://github.com/cmuratori/computer_enhance.git'
+
+# --- Run ---
+if ($NoPull) { clone-gitrepo $path_course_content $url_computer_enhance -NoPull }
+else         { clone-gitrepo $path_course_content $url_computer_enhance }
+
+write-host ''
+write-host 'Course content up to date.'