fix(agent): reduce the size of agent binary by modules separation

internal/dnsproviders/gen.py

@@ -0,0 +1,55 @@
+import requests
+import os
+
+class Entry:
+  def __init__(self, name: str, type: str, **kwargs) -> None:
+    self.name = name
+    self.type = type
+  
+url = "https://api.github.com/repos/go-acme/lego/contents/providers/dns"
+response = requests.get(url)
+data: list[Entry] = [Entry(**i) for i in response.json()]
+
+header = "//go:generate /usr/bin/python3 gen.py\n\npackage dnsproviders\n\n"
+names: list[str] = [
+  "Local = \"local\"",
+  "Pseudo = \"pseudo\"",
+]
+imports: list[str] = [
+  "\"github.com/yusing/go-proxy/internal/autocert\""
+]
+genMap: list[str] = [
+  "autocert.Providers[Local] = autocert.DNSProvider(NewDummyDefaultConfig, NewDummyDNSProviderConfig)",
+  "autocert.Providers[Pseudo] = autocert.DNSProvider(NewDummyDefaultConfig, NewDummyDNSProviderConfig)",
+]
+
+blacklists = [
+  "internal",
+  # deprecated 
+  "azure",
+  "brandit",
+  "cloudxns",
+  "dnspod",
+  "mythicbeasts", 
+  "yandexcloud"
+]
+
+for item in data:
+    if item.type != "dir" or item.name in blacklists:
+      continue
+    imports.append(f"\"github.com/go-acme/lego/v4/providers/dns/{item.name}\"")
+    genMap.append(f"autocert.Providers[\"{item.name}\"] = autocert.DNSProvider({item.name}.NewDefaultConfig, {item.name}.NewDNSProviderConfig)")
+    
+with open("providers.go", "w") as f:
+  f.write(header)
+  f.write("import (\n")
+  f.write("\n".join(imports))
+  f.write("\n)\n\n")
+  f.write("const (\n")
+  f.write("\n".join(names))
+  f.write("\n)\n\n")
+  f.write("func InitProviders() {\n")
+  f.write("\n".join(genMap))
+  f.write("\n}\n\n")
+  
+os.execvp("go", ["go", "fmt", "providers.go"])