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Here are scripts I created or adapted from things I've found. If they work fine for me they are likely not bug free... So you should test this stuff carefully before any important use. In any case the use is at your own risks !

Unix/Linux Shell Scripts

Recursive Search & Replace

I looked for a long time such script. It is very useful to replace quickly a string by another in all files of a whole directory tree. To be used carefully ! The interesting parts of code used here that can be extracted and reused are :

- Function ConfirmOrExit()

- Parameters with default values

- Find, Sed and Xargs use

#!/bin/bash

clear

echo

echo "################################################################"

echo "# #"

echo "# RECURSIVE SEARCH & REPLACE #"

echo "# By Thomas Guilleminot - www.guilleminot.org #"

echo "# #"

echo "################################################################"

## FUNCTION DECLARATION ##

function ConfirmOrExit() {

while true

echo

echo -n "Please confirm (y or n) : "

read CONFIRM

case $CONFIRM in

y|Y|YES|yes|Yes) break ;;

n|N|no|NO|No)

echo

echo Aborting as you entered $CONFIRM

echo

exit

;;

*) echo Please enter only y or n

esac

done

echo You entered $CONFIRM. Continuing...

}

## PARAMETERS PASSED - IF NOT SET ASSIGNING DEFAULT VALUES ##

test -n "$1" && TARGET_DIRECTORY=$1

test -n "$2" && FILE_EXTENSION=$2

test -n "$3" && STRING_SEARCH=$3

test -n "$4" && STRING_REPLACE=$4

echo

echo "PARAMETERS :"

echo "------------"

echo "TARGET_DIRECTORY : " ${TARGET_DIRECTORY="/mydirectory/"};

echo "FILE_EXTENSION : " ${FILE_EXTENSION="*.txt"};

echo "STRING_SEARCH : " ${STRING_SEARCH="the old string"};

echo "STRING_REPLACE : " ${STRING_REPLACE='the new string'};

## EXECUTION ##

echo

echo "STEP 1 : SEARCHING FILES..."

echo "---------------------------"

echo

find $TARGET_DIRECTORY -name $FILE_EXTENSION | sed 's/ /\\ /g' | xargs grep "$STRING_SEARCH" /dev/null

ConfirmOrExit

echo

echo "STEP 2 : REPLACING STRING..."

echo "----------------------------"

echo

find $TARGET_DIRECTORY -name $FILE_EXTENSION | sed 's/ /\\ /g' | xargs sed -i -e s/"$STRING_SEARCH"/"$STRING_REPLACE"/

echo "Done."

echo

echo "STEP 3 : CHECKING FILES..."

echo "--------------------------"

echo

find $TARGET_DIRECTORY -name $FILE_EXTENSION | sed 's/ /\\ /g' | xargs grep "$STRING_SEARCH" /dev/null

echo "Done. Exiting..."

echo

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