append_command.sh

#!/bin/sh
# Portable POSIX script to append rm command to all launch.sh files
# found in Emus/*/.pak/ directories to remove recent.txt file.
#
# Usage: ./append_comment.sh [--dryrun]
#   --dryrun: Show what would be changed without modifying files

COMMAND_TO_ADD='rm -f "$SHARED_USERDATA_PATH/.minui/recent.txt"'
TARGET_FILENAME="launch.sh"

# Dry run mode flag
dryrun=0

# Counters
modified=0
skipped=0
errors=0

# Function to append command to a file
append_command_to_file() {
    file_path="$1"

    # Check if command already exists (look for rm at start of line with recent.txt)
    if grep -q "^rm.*recent\.txt" "$file_path" 2>/dev/null; then
        printf "⏭️  Skipped (already exists): %s\n" "$file_path"
        skipped=$((skipped + 1))
        return
    fi

    # Dry run mode - just log what would happen
    if [ "$dryrun" -eq 1 ]; then
        printf "🔍 Would modify: %s\n" "$file_path"
        modified=$((modified + 1))
        return
    fi

    # Check if file ends with newline (busybox-compatible method)
    last_char=$(tail -c 1 "$file_path" 2>/dev/null | od -An -tx1 | tr -d ' ')
    if [ -n "$last_char" ] && [ "$last_char" != "0a" ]; then
        # File doesn't end with newline, add one
        printf "\n%s\n" "$COMMAND_TO_ADD" >> "$file_path"
    else
        # File ends with newline, just append command
        printf "%s\n" "$COMMAND_TO_ADD" >> "$file_path"
    fi

    if [ $? -eq 0 ]; then
        printf "✅ Modified: %s\n" "$file_path"
        modified=$((modified + 1))
    else
        printf "❌ Error processing: %s\n" "$file_path"
        errors=$((errors + 1))
    fi
}

# Function to check if path is in Emus/*/.pak/ directory structure
is_in_emus_pak_directory() {
    file_path="$1"

    # Check if path contains "Emus" directory and a .pak directory after it
    # Matches both:
    #   - Emus/*.pak/* (direct .pak under Emus)
    #   - Emus/*/*.pak/* (.pak under a subdirectory of Emus)
    case "$file_path" in
        */Emus/*.pak/* | */Emus/*/*.pak/*)
            return 0  # true
            ;;
        *)
            return 1  # false
            ;;
    esac
}

# Recursive function to find and process launch.sh files
process_directory() {
    dir="$1"

    # Process all entries in the directory
    for entry in "$dir"/* "$dir"/.[!.]* "$dir"/..?*; do
        # Skip if glob didn't match anything
        [ -e "$entry" ] || continue

        if [ -d "$entry" ]; then
            # Recursively process subdirectories
            process_directory "$entry"
        elif [ -f "$entry" ]; then
            # Check if filename matches and is in correct directory structure
            basename_entry=$(basename "$entry")
            if [ "$basename_entry" = "$TARGET_FILENAME" ]; then
                if is_in_emus_pak_directory "$entry"; then
                    append_command_to_file "$entry"
                fi
            fi
        fi
    done
}

# Main execution
main() {
    # Parse command line arguments
    for arg in "$@"; do
        case "$arg" in
            --dryrun)
                dryrun=1
                ;;
            *)
                printf "Unknown option: %s\n" "$arg"
                printf "Usage: %s [--dryrun]\n" "$0"
                exit 1
                ;;
        esac
    done

    if [ "$dryrun" -eq 1 ]; then
        printf "🔍 DRY RUN MODE - No files will be modified\n"
    fi

    printf "🔍 Scanning for launch.sh files in Emus/*/.pak/ directories...\n\n"

    # Start processing from current directory
    process_directory "."

    # Print summary
    printf "\n"
    printf "==================================================\n"
    printf "📊 Summary:\n"
    if [ "$dryrun" -eq 1 ]; then
        printf "   Would modify: %d\n" "$modified"
    else
        printf "   Modified: %d\n" "$modified"
    fi
    printf "   Skipped:  %d\n" "$skipped"
    printf "   Errors:   %d\n" "$errors"
    printf "==================================================\n"
}

# Run main function
main "$@"