heavy overhaul: Better communication, option to only clean one file, adding backups and directory independency

pdf-clearmeta.sh

@@ -5,33 +5,55 @@
 # This happens by the usage of pdftk, a powerful command line tool on GNU/Linux
 
 # change to directory where the script resides if tool is called by cron
-cd "$(dirname "$(readlink -f "$0")")"
 
-ls *.pdf > /dev/null 2>&1
-if [ "$?" = "0" ]; then
-	mkdir ./temp 	# create temporary directory
-	cp ./*.pdf ./temp
-else
-	echo "No files found"
+if [ "$#" == "0" ]; then
+	echo "Searching for PDF files in this directory..."
+	ls *.pdf > /dev/null 2>&1
+	if [ "$?" != "0" ]; then
+		echo "No files found. Maybe change directory or give one file as parameter."
 		exit 1
+	fi
+	echo "Cleaning all files in the current directory..."
+	read -p "Should I proceed? Press Enter to continue." END
+	TMPDIR=$(mktemp -d) 	# create temporary directory
+	cp ./*.pdf $TMPDIR
+
+elif [ "$#" == "1" ]; then
+	if [ -e "$1" -a -f "$1" ]; then
+		echo "Cleaning $1..."
+		TMPDIR=$(mktemp -d) 	# create temporary directory
+		cp "$1" $TMPDIR
+	else
+		echo "$1 does not exist or is no file."
+		exit 1
+	fi
+
+else
+	echo "Too many parameters. Please give no file (cleans all files in current directory) or one file as parameter."
+	exit 1
+	
 fi
 
-# Replace spaces with underscores
-for FILE in ./temp/*.pdf; do
-	rename "s/ /_/g" "$DATEI" > /dev/null 2>&1;
-done
 
-
-for i in $( find ./temp -type f -name "*.pdf" );	# filename with path in $i
+for FILE in $TMPDIR/*.pdf;	# filename with path in $i
 do
-	FILENAME=`basename $i`	# filename without path
+	FILENAME=$(basename "$FILE")	# filename without path, but possible spaces
+	TMPFILENAME=$(echo $FILENAME | sed "s/ /_/g")		# replace spaces by underscores
+	TMPFILE="$TMPDIR/$TMPFILENAME"
+	EXTLESS=$(echo $FILENAME | sed "s/\.pdf$//")
+	BAKFILENAME="$EXTLESS.pdf.bak"
+	
+	cp "$FILE" "$BAKFILENAME"   # Generating backup
+	 
+	mv "$FILE" "$TMPFILE"		# rename it as long as we work with it
 
 	# Dump data in temporary file
-	pdftk $i dump_data output $i.meta
+	pdftk "$TMPFILE" dump_data output "$TMPFILE".meta
 
-	sed 's/InfoValue:.*/InfoValue:/g' $i.meta > $i.meta.clean
+	sed 's/InfoValue:.*/InfoValue:/g' "$TMPFILE".meta > "$TMPFILE".meta.clean
 
-	pdftk $i update_info $i.meta.clean output $FILENAME  # Update Metadata from cleaned metafile and write to original file
+	pdftk "$TMPFILE" update_info "$TMPFILE".meta.clean output "$FILENAME"  # Update Metadata from cleaned metafile and write to original file
+	echo "Cleaned $FILENAME from metadata. Saved backup to $BAKFILENAME."
 done
 
-rm -r ./temp
+rm -r $TMPDIR