Using the below snippet you can find a matching string in a file and replace the entire line in the file instead of just the match.
This example should technically work cross platform with git-bash, multiple linux bash, etc. – will update post if there is a discrepancy.
#!/bin/bash
function misc_findReplace_wholeLine()
{
VARIABLE_FIND="$1"
VARIABLE_REPLACE="$2"
VARIABLE_FILE="$3"
echo "Finding: $VARIABLE_FIND"
echo "Replacing With: $VARIABLE_REPLACE"
echo "File to Operate On: $VARIABLE_FILE"
sed -i "\@${VARIABLE_FIND}@c${VARIABLE_REPLACE}" "$VARIABLE_FILE"
}
#Ensure nothing happens outside the directory this script is ran from
cd "$(dirname "$0")"
SCRIPT_DIRECTORY=$(pwd)
MY_PROJECT_DIRECTORY="$SCRIPT_DIRECTORY/my-code-project"
###################################################################
#### FILE: my-code-project/my-sub-directory/file.properties ####
###################################################################
FILE_TO_WORK_WITH="$MY_PROJECT_DIRECTORY/my-sub-directory/file.properties"
STRING_TO_FIND="host="
STRING_TO_REPLACE="host=localhost"
echo "#############################################"
echo "### Checking Before Variable Replacement: ###"
echo "#############################################"
echo ""
cat "$FILE_TO_WORK_WITH" | grep "$STRING_TO_FIND"
echo ""
echo "#############################################"
misc_findReplace_wholeLine "$STRING_TO_FIND" "$STRING_TO_REPLACE" "$FILE_TO_WORK_WITH"
echo "############################################"
echo "### Checking After Variable Replacement: ###"
echo "############################################"
echo ""
cat "$FILE_TO_WORK_WITH" | grep "$STRING_TO_FIND"
echo ""
echo "#############################################"
Special thanks to user @stas-chernetski on Stack Overflow for providing the syntax example at the below link:
Cody's Blog 
hey there, i have another neet trick for your script.
getting your script’s directory is something i’ve been using a lot.
SCRIPT_DIRECTORY=”$( cd “$( dirname “${BASH_SOURCE[0]}” )” >/dev/null 2>&1 && pwd )”
it might seem like a terrifiying line, but it is implemented in a template of a script i have for myself.
additionally, this line will break if your ever try to source another script which has that variable.
what i used to solve this, is in my bash template generator i made the variable get an automatic hash in the end:
get-hash: cat /dev/urandom | tr -dc ‘A-Z0-9’ | fold -w 16 | head -1
SCRIPT_DIRECTORY_$(get-hash)=…
It isn’t the cleanest solution, nor it is the best, but i guess it worked out for me for a while
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