Add an uninstaller script

Co-authored-by: pico_190 <picoprograma190@proton.me>

Author: ZakaHaceCosas

docs/manual/install.md

@@ -27,6 +27,12 @@ Copy and paste the following code in a terminal session.
 curl -fsSL fuckingnode.github.io/install.sh | bash
 ```
 
+On Linux an macOS you're provided with an uninstall script we hope you never need.
+
+```bash
+curl -fsSL fuckingnode.github.io/remove.sh | bash
+```
+
 ### :simple-nixos: Nix / NixOS
 
 !!! warning

docs/remove.sh

@@ -0,0 +1,74 @@
+#!/bin/bash
+
+set -e
+
+INSTALL_DIR="/usr/local/fuckingnode"
+
+remove_the_thing() {
+    echo "Removing install files..."
+
+    if [ -d "$INSTALL_DIR" ]; then
+        if sudo rm -rf "$INSTALL_DIR" 2>/dev/null; then
+            echo "Removed $INSTALL_DIR entirely"
+        else
+            echo "Failed to remove $INSTALl_DIR."
+        fi
+    fi
+}
+
+clean_path_from_file() {
+    local file="$1"
+
+    [ ! -f "$file" ] && return
+
+    if grep -q "$INSTALL_DIR" "$file"; then
+        cp "$file" "$file.bak_fuckingnode_$(date +%Y%m%d%H%M%S)"
+        sed -i "\#$INSTALL_DIR#d" "$file"
+        echo "Lines containing $INSTALL_DIR gone from $file (a backup was made just in case, .bak_fuckingnode_*)."
+    fi
+}
+
+clean_path_config() {
+    echo "Clearing PATH..."
+
+    FILES_BASH=("$HOME/.bashrc" "$HOME/.bash_profile" "$HOME/.profile")
+    FILES_ZSH=("$HOME/.zshrc")
+    FISH_CONFIG="$HOME/.config/fish/config.fish"
+
+    for f in "${FILES_BASH[@]}"; do
+        clean_path_from_file "$f"
+    done
+
+    for f in "${FILES_ZSH[@]}"; do
+        clean_path_from_file "$f"
+    done
+
+    clean_path_from_file "$FISH_CONFIG"
+}
+
+main() {
+    echo "FuckingNode uninstall"
+    echo "So sad to see you leave :("
+    echo "This'll remove binaries, shortcuts, and PATH entries related to FuckingNode."
+    echo ""
+
+    read -r -p "Proceed? [y/N]: " ans
+    case "$ans" in
+        y|Y|yes|YES)
+            ;;
+        *)
+            echo "Aborted. Thanks for staying!"
+            exit 0
+            ;;
+    esac
+
+    remove_the_thing
+    clean_path_config
+
+    echo ""
+    echo "Uninstalled successfully."
+    echo "If you did this because you were unsatisfied with FuckingNode, please create an issue at https://github.com/FuckingNode/FuckingNode/issues/new telling us how we could improve."
+    echo "Thank you anyways, cya!"
+}
+
+main "$@"