Add linewise user confirmation

uninstall

@@ -1,5 +1,22 @@
 #!/bin/bash
 
+confirm() {
+  while [ 1 ]; do
+    read -p "$1" -n 1 -r
+    echo
+    if [[ "$REPLY" =~ ^[Yy] ]]; then
+      return 0
+    elif [[ "$REPLY" =~ ^[Nn] ]]; then
+      return 1
+    fi
+  done
+}
+
+remove() {
+  echo "Remove $1"
+  rm -f "$1"
+}
+
 remove_line() {
   src=$(readlink "$2")
   if [ $? -eq 0 ]; then
@@ -8,23 +25,30 @@ remove_line() {
     src=$2
     echo "Remove from $2:"
   fi
-  echo "  - $1"
 
-  changed=0
+  line_no=1
+  match=0
   while [ 1 ]; do
-    line=$(grep -m1 -nF "$1" "$src") || break
-    line_no=$(sed 's/:.*//' <<< "$line")
-    echo "    - Remove line ($line)"
-    awk -v n=$line_no 'NR == n {next} {print}' "$src" > "$src.bak" &&
-      mv "$src.bak" "$src" || break
-    changed=1
+    line=$(sed -n "$line_no,\$p" "$src" | grep -m1 -nF "$1") || break
+    match=1
+    line_no=$(( $(sed 's/:.*//' <<< "$line") + line_no - 1 ))
+    echo    "  - Line #$line_no: $(sed 's/^[0-9]*://' <<< "$line")"
+    confirm "    - Remove (y/n) ? "
+    if [ $? -eq 0 ]; then
+      awk -v n=$line_no 'NR == n {next} {print}' "$src" > "$src.bak" &&
+        mv "$src.bak" "$src" || break
+      echo  "      - Removed"
+    else
+      echo  "      - Skipped"
+      line_no=$(( line_no + 1 ))
+    fi
   done
-  [ $changed -eq 0 ] && echo "    - Nothing found"
+  [ $match -eq 0 ] && echo "  - Nothing found"
   echo
 }
 
 for shell in bash zsh; do
-  rm -f ~/.fzf.${shell}
+  remove ~/.fzf.${shell}
   remove_line "source ~/.fzf.${shell}" ~/.${shell}rc
 done
 
@@ -34,7 +58,7 @@ if [ -f "$bind_file" ]; then
 fi
 
 if [ -d ~/.config/fish/functions ]; then
-  rm -f ~/.config/fish/functions/fzf.fish
+  remove ~/.config/fish/functions/fzf.fish
 
   if [ "$(ls -A ~/.config/fish/functions)" ]; then
     echo "Can't delete non-empty directory: \"~/.config/fish/functions\""