Using FORTRESS with CD-on-Exit

Setup (One Time)

Add this line to your ~/.bashrc or ~/.zshrc:

source ~/Documents/GithubOrgs/FortranGoingOnForty/fortress/fortress.sh

Then reload your shell:

source ~/.bashrc  # or source ~/.zshrc

Usage

Instead of running fpm run, use the fortress command:

fortress

This runs the fortress file explorer. When you're browsing:

1. Use ↑↓ to navigate files/directories
2. Use → to enter a directory
3. Use ← to go back
4. Press c on any directory to exit fortress and CD your shell to that directory
5. Press q to quit without changing directory

How It Works

When you press c:

1. FORTRESS writes the selected directory path to ~/.fortress_cd
2. FORTRESS exits
3. The shell function reads ~/.fortress_cd and runs cd to that directory
4. The temp file is cleaned up

This is the same pattern used by tools like fzf.

Important Notes

• ❌ fpm run does NOT enable cd-on-exit (it runs directly)
• ✅ fortress command DOES enable cd-on-exit (uses the shell function)
• You must source fortress.sh in your shell config for this to work
• This only works in interactive shells, not in scripts