updates

Author: xination

replace_string_multi_files.sh

@@ -2,22 +2,54 @@
 # replace string1 to string2 in multiple files.
 # usage ./replace_string_multi_files.sh string1 string2
 
-# to avoid we miss arguments.
-if [ "$1" = "" ] || [ "$2" = "" ]; then
-    echo " we need 2 arguments" 
-    exit
+# when user doesn't input arguments, we should prompt message
+# for user to input the old and new string.
+if [ "$#" = "2" ] ; then
+    old_string=$1
+    new_string=$2
+ 
+else
+   
+    printf  "(1)replace text or (2)redo previous action? (1/2) "
+    read -r ans
+
+    if [ "$ans" = "1" ]; then
+	printf 'Enter old string : '
+    	read -r old_string
+ 
+    	printf 'Enter new string : '
+    	read -r new_string
+    elif [ "$ans" = "2" ]; then
+
+
+	while read -r fileName; do
+	    
+	    echo "apply redo for ${fileName}"
+	   
+	    # apply patches
+	    patch < .${fileName}.patch 1>/dev/null;
+
+	    rm .${fileName}.patch
+
+	done < .fileList.txt
+	
+	exit
+    fi
 fi
 
+ 
+
+
 # we also avoid to change this script.
 thisScript=$0
 thisScript=${thisScript#"./"}
 
 # to show which file in the current location has the string1 in it.
-echo "we have $1 in the following file"
+echo "we have $old_string in the following file(s)"
 echo "_______________________________"
-grep -r "$1" * --color --exclude=$thisScript 
+grep -r "$old_string" * --color --exclude=$thisScript 
 echo "_______________________________"
-echo "replace $1 to $2? (y/n)" 
+echo "replace $old_string to $new_string? (y/n)" 
 read ans
 
 #########################################
@@ -26,19 +58,28 @@ if [ "$ans" = "y" ];
 then
 
     # redirect filenames to a temp file.
-    grep -lr "$1" * --exclude=$thisScript > .fileList.txt
+    grep -lr "$old_string" * --exclude=$thisScript > .fileList.txt
 
     # read in each line and assign it to fileName	
     # and then we do the substitution. 
     while read -r fileName; do
+	   
+	   cp $fileName ${fileName}.orig
 
-	echo "edited $fileName" 
+	   echo "edited $fileName" 
 
-	sed  -i 's|'"$1"'|'"$2"'|g' "${fileName}"
+	   sed  -i 's|'"$old_string"'|'"$new_string"'|g' "${fileName}"
+	
+	   # make patches for backup.
+	   diff -u $fileName ${fileName}.orig > .${fileName}.patch
+
+	   # now we are save to remove .orig file
+	   rm ${fileName}.orig
 
     done < .fileList.txt
 
-    rm .fileList.txt
+    # rm .fileList.txt
 fi
 
 
+