configure computer and host namesHEADmain

When configuring identifier names, we use interactive prompts to ask the
user for the computer name and hostname. We retrieve the current computer
name via `scutil` and dynamically calculate a standardized hostname default.

For better UX, we use the `read -i` option to pre-fill these values,
allowing the user to simply confirm the defaults or edit them easily.

Note: The `-i` option requires *Bash 4.0+*. Although macOS ships with
Bash 3.2, this script runs after the Homebrew bundle installation (which
includes the up-to-date bash package), ensuring the necessary shell version
is available.

```
$ /bin/bash --version
GNU bash, version 3.2.57(1)-release (arm64-apple-darwin25)
Copyright (C) 2007 Free Software Foundation, Inc.

$ /usr/bin/env bash --version
GNU bash, version 5.3.9(1)-release (aarch64-apple-darwin25.1.0)
Copyright (C) 2025 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
```

2 files changed, 30 insertions, 0 deletions

diff --git a/.macos b/.macos
index 5623c2d..a77815f 100755
--- a/.macos
+++ b/.macos
@@ -1,6 +1,33 @@
 #!/usr/bin/env bash
 set -ex
 
+# Ask for the permissions upfront
+sudo -v
+
+#########################################################################
+# General
+#########################################################################
+
+# Configure identifier names
+current_name=$(scutil --get ComputerName)
+user_computer_name=""
+user_hostname=""
+
+read -e -p "Enter computer name (blank to skip): " -i "$current_name" user_computer_name
+
+if [ -n "$user_computer_name" ]; then
+	sudo scutil --set ComputerName "$user_computer_name"
+
+	default_hostname=$(echo "$user_computer_name" | sed -E 's/([a-z0-9])([A-Z])/\1-\2/g; s/[^a-zA-Z0-9]+/-/g; s/^-+|-+$//g' | tr '[:upper:]' '[:lower:]')
+	read -e -p "Enter hostname (blank to skip): " -i "$default_hostname" user_hostname
+fi
+
+if [ -n "$user_hostname" ]; then
+	sudo scutil --set LocalHostName "$user_hostname"
+	sudo scutil --set HostName "$user_hostname"
+fi
+
+
 #########################################################################
 # Trackpad
 #########################################################################
diff --git a/Brewfile b/Brewfile
index c2a6865..5dd8b6e 100644
--- a/Brewfile
+++ b/Brewfile
@@ -1,3 +1,6 @@
+# Shell
+brew "bash"
+
 # Development Tools
 brew "colima"
 brew "docker"