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							22 lines
						
					
					
						
							292 B
						
					
					
				| #!/bin/bash | |
|  | |
| usage() { | |
| 	echo "Usage: $(basename "$0") <REGEX> <STRING> <FILE>" | |
| } | |
| 
 | |
| if [[ $# -ne 3 ]]; then | |
| 	usage | |
| 	exit 2 | |
| fi | |
| 
 | |
| REGEX=$1 | |
| STRING=$2 | |
| FILE=$3 | |
| 
 | |
| if ! grep -Eq "$REGEX" "$FILE"; then | |
| 	printf "$STRING\n" >>$FILE | |
| 	echo appended | |
| else | |
| 	sed -Ei "s|$REGEX|$STRING|g" $FILE | |
| 	echo replaced | |
| fi
 |