automatic creation of links

.gitignore

@@ -0,0 +1 @@
+/backup

create_links.sh

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+#!/usr/bin/env bash
+
+FILE_PATH=$(readlink -f "$0")
+REPO_DIR=$(dirname "$FILE_PATH")
+BACKUP_DIR="$REPO_DIR/backup"
+mkdir -p "$BACKUP_DIR"
+FILE_DST=("$HOME/.zshrc" "$HOME/.vimrc" "$HOME/.gitconfig")
+
+for f_out in "${FILE_DST[@]}"
+do
+	FNAME="$(basename -- $f_out)"
+	F_SRC="$REPO_DIR/$FNAME"
+	if [ -f $f_out ] && [ ! -L "$f_out" ]; then
+		echo "Replacing '$f_out' with symlink."
+		i=0
+		F_BACKUP_BASE="$BACKUP_DIR/$FNAME"
+		F_BACKUP=$F_BACKUP_BASE
+		while [ -e "$F_BACKUP" ]; do
+			printf -v F_BACKUP '%s.backup%04d' "$F_BACKUP_BASE" "$(( i++ ))"
+		done
+		echo "Moving '$f_out' to '$F_BACKUP'"
+		mv "$f_out" "$F_BACKUP"
+		ln -sv "$F_SRC" "$f_out"
+	else
+		echo "$f_out does not exist as regular file."
+		if [ -e "$f_out" ]; then
+			echo "There is already a symlink for $f_out. Skipping..."
+		else
+			ln -sv "$F_SRC" "$f_out"
+		fi
+	fi
+done