#!/bin/bash
#Dieses script ist eine Modifikation des new_version-Scripts und erlaubt, alle Dateien eines Verzeichnisses (1.Parameter) in ein bereits existierendes anderes Verzeichnis (2.Parameter) zu hardlinken. Dateien, die den gleichen Namen wie eine bereits im Zielverzeichnis existierende Datei haben, werden hierbei übersprungen.
echo "Warning: this script creates bugs, if there are any soft links in the directory it's working on. please check for them beforehand."
target="$2"
echo "setting target to $target"
if ! [ -e $2 ]; then
	echo "$2 does not exist"
	echo "Creating directory \"$2\""
	mkdir $2
elif ! [ -d $2 ]; then
	target="${2}.directory"
	echo "WARNING: there already exists a file with the name \"$2\". Created directory \"$target\" instead."
	mkdir $target
else
	echo "linking files to existing directory $target"
fi
for file in "$1"/*
do
	echo "Processing: $file"
	name=$(basename "$file")
	newlocation="${target}/${name}"
	echo "testing new location: $newlocation"
	if ! [[ -e $newlocation ]]; then
		echo "$file passed test: does not exist in target directory so far."
		process=true
	elif [[ -d "$file" ]]; then
		echo "$file passed test: is a directory"
		process=true
		
	else
		echo "$file skipped: file with the same name existing in target directory"
		process=false
	fi
	if $process; then
		echo "identifying $file"
		if [ -f "$file" ]; then
			echo "$file is a regular file. creating hard link."
			ln "$file" "$target"
		else
			if [ -d "$file" ]; then
				echo "$file is a directory: starting recursion."
				$0 "$file" "$target"/"$name"
			else
				echo "$file is neither regular nor directory. creating copy."
				cp -a "$file" "$target"
			fi
		fi
	fi
done
echo "Processed all files in $1"