Wrote it

main.py

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+import pymsgbox
+import dns.resolver
+import platform
+import os
+current_os = platform.system()
+
+print(current_os)
+
+LINE_IDENTIFIER = "ADDED BY RECAPE"
+
+try:
+    hosts_file_dir = {
+        "Windows": "C:\Windows\System32\drivers\etc\hosts",
+        "Linux": "/etc/hosts",
+        "Darwin": "/private/etc/hosts"
+    }[current_os]
+except KeyError:
+    hosts_file_dir = "/etc/hosts"
+
+OPTIFINE_URL = "s.optifine.net"
+RECAPE_URL = "recape-server.boyne.dev"
+
+if False: #os.path.exists(".debug"):
+    RECAPE_IP = "127.0.0.1"
+else:
+    RECAPE_IP = dns.resolver.resolve(RECAPE_URL)[0].to_text()
+
+def install():
+    uninstall()
+    try:
+
+        with open(hosts_file_dir, "r") as hosts:
+            content = hosts.readlines()
+        with open(hosts_file_dir, "w") as hosts:
+            content.append("\n" + RECAPE_IP + " " + OPTIFINE_URL + " #" + LINE_IDENTIFIER)
+            hosts.write("".join(content))
+
+    except PermissionError as e:
+
+        return "Could not access your hosts file. You need to start ReCape as an administrator/root in order to do this. Do it yourself with the Do It Myself button or run this installer as an administrator, root, or superuser."
+
+    return "Installed succesfully!"
+
+def uninstall():
+    try:
+        with open(hosts_file_dir, "r") as hosts:
+            content = hosts.readlines()
+            for i in range(0, len(content)):
+                if LINE_IDENTIFIER in content[i]:
+                    content.pop(i)
+                    break
+        with open(hosts_file_dir, "w") as hosts:
+            hosts.write("".join(content))
+    except PermissionError:
+        print("Access Denied")
+        return "Could not access your hosts file. You need to start ReCape as an administrator/root in order to do this. Do it yourself with the Do It Myself button or run this installer as an administrator, root, or superuser."
+
+
+    return "Uninstalled ReCape!"
+
+def get_installer_text():
+    return "You can install ReCape yourself by manually inputting text into your hosts file. On your system, this file should be located at \"" + hosts_file_dir + "\". On a new line, put in this text:\n" + RECAPE_IP + " " + OPTIFINE_URL + " #" + LINE_IDENTIFIER + "\nSimilarly, you can uninstall ReCape by deleting that line in the hosts file later."
+
+while True:
+    action = pymsgbox.confirm("Welcome to the ReCape installer!", "ReCape Installer", ["Install", "Uninstall", "Do It Myself", "Quit"])
+
+    if action == "Install":
+        result = install()
+    elif action == "Uninstall":
+        result = uninstall()
+    elif action == "Do It Myself":
+        result = get_installer_text()
+    else:
+        break
+
+    next = pymsgbox.confirm(result, "ReCape Installer", ["Back", "Quit"])
+
+    if next == "Quit":
+        break