Bash脚本选项处理需求：新增-all与-q选项并限制重复

Alright, let's work through adding these two new options to your Bash script. I'll break this down into clear, actionable steps that fit your existing rules:

Start by initializing variables to track the new states and keep track of selected original options:

#!/bin/bash

# Track silent mode state
silent=false
# Track whether -all was triggered
select_all=false
# Store manually selected -1/-2/.../-N options
selected_options=()

# Define your N value here (e.g., N=5 for options -1 to -5)
N=5

Use a while loop with case statements to handle each argument—this is flexible enough to support both your existing single-digit options and the new multi-character -all/-q:

while [[ $# -gt 0 ]]; do
    case "$1" in
        -q)
            # Enable silent mode
            silent=true
            shift
            ;;
        -all)
            # Mark that all options should be selected
            select_all=true
            shift
            ;;
        -[1-9]|[1-9])
            # Catch your original -1 to -N options (adjust regex if N is 10+)
            selected_options+=("$1")
            shift
            ;;
        *)
            # Handle unknown options
            echo "Error: Unknown option '$1'" >&2
            exit 1
            ;;
    esac
done

If -all was passed, add all -1 to -N options to your selected list. We'll also avoid duplicates if someone accidentally passes -all alongside a specific option:

if $select_all; then
    for ((i=1; i<=N; i++)); do
        opt="-$i"
        # Only add if not already in selected_options
        if ! [[ " ${selected_options[@]} " =~ " $opt " ]]; then
            selected_options+=("$opt")
        fi
    done
fi

Enforce -all Usage Rules #

You mentioned -all must appear alone or with "specified options"—I assume this means it can be used with -q but not with your original -1/-2 etc. If that's the case, modify the -all case block to throw an error if any original options are already selected:

-all)
    if [[ ${#selected_options[@]} -gt 0 ]]; then
        echo "Error: -all cannot be combined with individual -1/-2/.../-N options" >&2
        exit 1
    fi
    select_all=true
    shift
    ;;

If -q was passed, redirect all terminal output (including errors) to /dev/null to ensure no output is sent to the user:

if $silent; then
    exec >/dev/null 2>&1
fi

Now you can use the selected_options array in your original script logic. For example:

# Example: Print selected options (will be suppressed if -q is used)
echo "Selected options: ${selected_options[@]}"

# Insert your original script logic here, using selected_options as needed

• ./yourscript.sh -all: Selects all -1 to -N options
• ./yourscript.sh -q: Runs silently with no selected options
• ./yourscript.sh -all -q: Selects all options and runs silently
• ./yourscript.sh -1 -3: Selects only -1 and -3
• ./yourscript.sh -all -2: Throws an error (if you enforced the -all usage rule above)

内容的提问来源于stack exchange，提问作者Dave