prenv is a small Bash CLI for inspecting and formatting shell environment data.

• Pretty-prints environment variables
• Shows PATH entries one per line
• Runs a basic environment health check
• Includes an intended diff mode for comparing environment state before and after a command

Because the script is not executable yet, run it with Bash:

bash ./prenv

If you want to run it as ./prenv, make it executable first:

chmod +x ./prenv
./prenv

Pretty-print the current environment. This is the default command.

bash ./prenv
bash ./prenv print

Useful options:

• --sort sorts variables alphabetically
• --filter <text> filters variables by key or value
• --wrap wraps long values instead of truncating them
• --width <n> changes the output width
• --no-color disables ANSI colors

Examples:

bash ./prenv --sort
bash ./prenv --filter PATH
bash ./prenv --filter aws --width 100
bash ./prenv --wrap

Print the current PATH as a numbered list.

bash ./prenv path

Show a lightweight environment summary, including:

• shell
• user
• home directory
• AWS CLI presence and active profile
• kubectl presence
• Node.js version
• total number of PATH entries

bash ./prenv doctor

Intended to compare environment state before and after running a command.

bash ./prenv diff 'npm run build'

# Show all variables
bash ./prenv

# Show only variables related to PATH
bash ./prenv --filter PATH

# Show variables in sorted order
bash ./prenv --sort

# Inspect PATH cleanly
bash ./prenv path

# Run environment checks
bash ./prenv doctor

• The script currently needs bash ./prenv unless you add execute permissions.
• diff is present in the interface, but its current argument parsing and subshell behavior need follow-up before it works as expected for command-driven environment changes.

bash ./prenv --help