ai conversation – list bash functions

In Bash, you can list functions loaded in your current environment—including those loaded via the source (or .) command—using several built-in methods. 

1. List All Loaded Functions 

To see every function currently defined in your shell environment:

• List names only: declare -F
• List names and definitions: declare -f
• Using typeset: typeset -f (performs the same action as declare -f) 

2. Identify Source File and Line Numbers 

If you need to know exactly where a function was sourced from, you must enable the extdebug shell option before running the list command: 

1. Enable extended debugging: shopt -s extdebug
2. Display location:declare -F <function_name>
   • Note: When extdebug is on, declare -F followed by a function name will output the name, line number, and the source file path.
3. Disable when finished: shopt -u extdebug 

3. List Functions from a Specific Script 

If you want to see which functions will be loaded by sourcing a specific file without permanently loading them into your current shell, use a subshell:

# Sourcing the file in a subshell and dumping the resulting functions
bash -c ". ./your_script.sh; declare -F"

4. Summary Table of Commands

For more advanced shell management, you can refer to the official Bash Reference Manual. 

bash -c ". ./docker-prune-review.sh; declare -F"   
                                                                                                       
declare -f collect_container_data
declare -f generate_action_plan
declare -f generate_report
declare -f logic
declare -f main
declare -f parse_cmd_line
declare -f usage
declare -f validate_arguments

bash -c ". ./devops-bash-lib.sh; declare -F"  
                                                                                                                                 
declare -f align
declare -f convert_to_bytes
declare -f date_dif
declare -f debug_end_timer
declare -f debug_start_timer
declare -f generate_removal_snippet
declare -f get_docker_bulk_metadata
declare -f get_docker_container_diff
declare -f get_docker_container_image
declare -f get_docker_container_mounts
declare -f get_docker_container_name
declare -f get_docker_container_size_info
declare -f get_docker_container_vols_list
declare -f get_docker_containers_by_status
declare -f get_docker_system_df
declare -f get_dttm
declare -f header
declare -f msg_help_section
declare -f progress_bar