changed URL

.gitignore

@@ -4,3 +4,4 @@ log.txt
 __pycache__/
 .vscode/
 .direnv/
+.mypy_cache/

README.md

@@ -3,58 +3,99 @@ A DNS record updater for [Gandi's LiveDNS](https://api.gandi.net/docs/livedns/)
 This script is heavily inspired by [dyn-gandi](https://github.com/Danamir/dyn-gandi).
 
 ## How it works
-This script determines the your server's current IP by querying the resolvers defined in the config file.
-After that it reads the current state of the domains and subdomains you specified of Gandi.
-Should the IP address of a subdomain not match your current IP it will be updated.
-The subdomain will be created should it not already exist.
+This script determines the the current IP address by querying the resolvers defined in the config file.
+It then queries the subdomains' A records off of Gandi and compares their IP addresses to the current IP address.
+Should the IP address of a subdomain's A record not match your current IP address it will be updated. The subdomain's A record will be created should it not already exist.
 
-## Note
-The current implementation only allows for one entry per subdomain.
-Meaning that should you have a TXT and a CNAME record for a subdomain that is in the config file, then both these entries will be deleted and replaced by a single A name record.
+## Notes
+Every invocation of the script causes at least 1 request to a resolver specified and 1 API call to Gandi per domain.
+Updating a subdomain's A record is 1 API request per subdomain, even if they share the same domain.  
+Resolvers are queried in the order specified until one returns a valid IP address.  
+It is also possible to define a path to a file with the API key written in it. This is good for environments where the config file has to be shared like in a nix project.
 
 ## How to use
 First, get your API key from https://account.gandi.net/en/users/USER/security where `USER` is your Gandi username.
-On first run the program will create a minimal, yet complete `config.json` in the same directory it is being run in.  
-Next, enter the API key into the configuration file and assign domains to it.
-The domains are keys to a list of subdomain for a given domain you wish to monitor.
-The below example is complete and should explain itself.
-Resolvers are queried one after another until one returns a valid IP.
 
-`config.json`
+The script looks for a config file at `$HOME/.config/dyn-gandi/config.log` or `/etc/dyn-gandi.conf` in that order. So create a file at one of these locations according to the schema below.
+
 ```json
 {
   "api": {
     "<Your-API-Key>": {
       "example.com": [ "@", "www", "sub1" ],
       "example.org": [ "@", "www", "sub1", "sub2" ]
+    },
+    "/path/to/a/file/containing/api_key": {
+      "example.at": [ "sub1" ],
+      "example.au": [ "sub1" "sub2" ]
     }
   },
-  "ttl": 3600,
   "resolvers": [
     "https://ifconfig.me/ip",
     "https://me.gandi.net"
   ],
+  "ttl": 3600,
   "log_path": "./log.txt"
 }
 ```
 
+## Nix
+Add this to the modules.
+```nix
+
+inputs = {
+  nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";
+  dyn-gandi.url = "git+https://git.krsnik.at/Kristian/dyn-gandi.git";
+};
+
+outputs = {
+  self,
+  nixpkgs,
+  dyn-gandi
+}: {
+  ...
+  modules = [
+    dyn-gandi.nixosModules.default
+    {
+      dyn-gandi.enable = true;
+      dyn-gandi.settings = {
+        api = {
+          "/path/to/a/file/containing/api_key" = {
+            "example.com" = ["@" "www"];
+          };
+        };
+        resolvers = [
+          "https://ifconfig.me/ip"
+          "https://me.gandi.net"
+        ];
+        ttl = 3600;
+        log_path = "/path/to/log/file";
+      };
+      dyn-gandi.timer = 300;
+    }
+    ...
+  ];
+  ...
+}
+```
+Use `dyn-gandi.nixosModules.default` for a NixOs module and `dyn-gandi.homeManagerModules.default` for home-manager
+
+`dyn-gandi.timer` specifies a timer in seconds when the script should be repeated.
+
+
 ## Features
-* Support for arbitrarily many domains and records through a nested data structure.
-* Small codebase.
+* Support for arbitrarily many domains and subdomains through a nested data structure.
+* Small codebase
 * Logging
+* NixOS and home-manager modules
 
 ## Limitations
-* Right now only IPv4 addresses are supported
-* Every record is only allowed one A record.
-* Extra records (TXT, CNAME and such) will get deleted on update. 
+* Only IPv4 addresses are supported
 
 ## TODO
 * Testing
 * Command line options controlling: dry-run, config, log, verbosity, force
+* Support IPv6
 * Per subdomain TTL
-* Nix Flake support with exported config and service options
 * Better documentation
 * Better logging
-* Support IPv6
-* Remember other record types (TXT, etc.)
-* Detect TTL change and update even when the IP is the same

dyn_gandi/main.py

@@ -3,27 +3,33 @@ import json
 import re
 import os
 from datetime import datetime
+from typing import Callable, Any
 
 
-def loadSettings(path: str = f"{os.path.expanduser('~')}/.config/dyn-gandi/config.json") -> dict:
-    # TODO: check integrity of the config file
-    try:
-        with open(path, 'r') as file:
-            # Read if the API keys are path to files
-            config = json.load(file)
-            keys = config['api'].keys()
-            mask = dict()
-            for key in keys:
-                api_key = key
-                if os.path.exists(key):
-                    with open(key, 'r') as file:
-                        api_key = file.readline().strip()
-                mask[key] = api_key
-            config['api'] = {mask[key]: value for key,
-                             value in config['api'].items()}
-    except FileNotFoundError:
+def loadSettings() -> dict:
+    path = f"{os.path.expanduser('~')}/.config/dyn-gandi/config.json"
+
+    if not os.path.exists(path):
+        path = '/etc/dyn-gandi.json'
+
+    if not os.path.exists(path):
         quit()
-        # TODO log error and remove code below (do not create an unwanted config)
+
+    # TODO: check integrity of the config file
+    with open(path, 'r') as file:
+        # Read if the API keys are path to files
+        config = json.load(file)
+        keys = config['api'].keys()
+        mask = dict()
+        for key in keys:
+            api_key = key
+            if os.path.exists(key):
+                with open(key, 'r') as file:
+                    api_key = file.readline().strip()
+            mask[key] = api_key
+        config['api'] = {mask[key]: value for key,
+                         value in config['api'].items()}
+    return config
 
 
 def log(logline: str, path: str = './log.txt') -> None:
@@ -33,12 +39,13 @@ def log(logline: str, path: str = './log.txt') -> None:
             f"[{datetime.now().strftime('%Y-%m-%d %H:%M:%S')}]{logline}\n")
 
 
-def getCurrentIP(resolvers: list[str], log: callable) -> None | str:
+def getCurrentIP(resolvers: list[str], log: Callable[[str], Any]) -> str | None:
     # Go through resolvers until one retuns an IP
     for resolver in resolvers:
         response = requests.get(resolver)
         if response.status_code == 200:
             current_ip = response.text.strip()
+            # it suffices to check whether the search is not None since the regex is matches from beginning to end
             is_ipv4 = re.search(
                 '^((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\.?\\b){4}$', current_ip) is not None
             if is_ipv4:
@@ -51,35 +58,32 @@ def getCurrentIP(resolvers: list[str], log: callable) -> None | str:
     return None
 
 
-def checkRecords(api: dict, current_ip: str, log: callable) -> dict:
+def checkRecords(api: dict[str, dict[str, list[str]]], current_ip: str, log: Callable[[str], Any]) -> dict[str, dict[str, list[str]]]:
     # Returns the records that need to be renewed
     # TODO: Also detect TTL change
     records_to_renew = api
     for key, domains in api.items():
         headers = {'authorization': f"Apikey {key}"}
-        for domain, records in domains.items():
+        for domain, _ in domains.items():
             response = requests.get(
                 f"https://api.gandi.net/v5/livedns/domains/{domain}/records?rrset_type=A", headers=headers)
             if response.status_code == 200:
-                records_to_renew[key][domain] = list(set(records_to_renew[key][domain]) - set(record['rrset_name'] for record in (
-                    filter(lambda x: current_ip in x['rrset_values'], json.loads(response.json())))))
+                records_to_renew[key][domain] = list(
+                    set(records_to_renew[key][domain]) - set(record['rrset_name'] for record in (filter(lambda x: current_ip in x['rrset_values'], response.json()))))
             else:
                 log(f"[ERROR][{domain}][{response.status_code}] {response.json()}")
 
     return records_to_renew
 
 
-def renewRecords(records, current_ip, log, ttl=3600):
+def renewRecords(api: dict[str, dict[str, list[str]]], current_ip: str, log: Callable[[str], Any], ttl) -> None:
     # Updates the records and reates them if they don't exist
     payload = json.dumps({
-        'items': [{
-            'rrset_type': 'A',
-            'rrset_values': [current_ip],
-            'rrset_ttl': ttl
-        }]
+        'rrset_values': [current_ip],
+        'rrset_ttl': ttl
     })
 
-    for key, domains in records.items():
+    for key, domains in api.items():
         headers = {
             'authorization': f"Apikey {key}",
             'content-type': 'application/json',
@@ -88,7 +92,7 @@ def renewRecords(records, current_ip, log, ttl=3600):
         for domain, records in domains.items():
             for record in records:
                 response = requests.put(
-                    f"https://api.gandi.net/v5/livedns/domains/{domain}/records/{record}", data=payload, headers=headers)
+                    f"https://api.gandi.net/v5/livedns/domains/{domain}/records/{record}/A", data=payload, headers=headers)
                 if response.status_code == 201:
                     log(f"[OK][{domain}][{record}] Renewed with IP '{current_ip}'")
                 else:
@@ -97,13 +101,13 @@ def renewRecords(records, current_ip, log, ttl=3600):
 
 def main():
     settings = loadSettings()
-    log_path = settings['log_path']
-    ttl = settings['ttl']
-    def myLog(x): return log(x, log_path)
+    log_path, ttl = settings['log_path'], settings['ttl']
+    def logger(x: str) -> Any: return log(x, log_path)
 
-    current_ip = getCurrentIP(settings['resolvers'], myLog)
-    records_to_renew = checkRecords(settings['api'], current_ip, myLog)
-    renewRecords(records_to_renew, current_ip, myLog, ttl=ttl)
+    current_ip = getCurrentIP(settings['resolvers'], logger)
+    if current_ip is not None:
+        records_to_renew = checkRecords(settings['api'], current_ip, logger)
+        renewRecords(records_to_renew, current_ip, logger, ttl=ttl)
 
 
 if __name__ == '__main__':

flake.nix

@@ -27,6 +27,8 @@
         packages = with pkgs.${system}; [
           (poetry2nix.mkPoetryEnv {projectDir = self;})
           poetry
+          mypy
+          python310Packages.types-requests
         ];
       };
     });

nix/hm-module.nix

@@ -4,11 +4,11 @@ self: {
   pkgs,
   ...
 }: let
-  cfg = config.services.dyn-gandi;
+  cfg = config.dyn-gandi;
   package = self.packages.${pkgs.stdenv.hostPlatform.system}.default;
   inherit (lib) mkIf mkEnableOption mkOption types;
 in {
-  options.services.dyn-gandi = {
+  options.dyn-gandi = {
     enable = mkEnableOption "dyn-gandi";
 
     timer = lib.mkOption {
@@ -33,7 +33,7 @@ in {
         ]);
       in
         valueType;
-      default = throw "Please specify services.dyn-gandi.settings";
+      default = throw "Please specify dyn-gandi.settings";
     };
   };
 

nix/module.nix

@@ -1,15 +1,15 @@
-self: {
+inputs: {
   config,
   lib,
   pkgs,
   system,
   ...
 }: let
-  cfg = config.services.dyn-gandi;
-  package = self.packages.${pkgs.stdenv.hostPlatform.system}.default;
+  cfg = config.dyn-gandi;
+  package = inputs.self.packages.${pkgs.stdenv.hostPlatform.system}.default;
   inherit (lib) mkIf mkEnableOption mkOption types;
 in {
-  options.services.dyn-gandi = {
+  options.dyn-gandi = {
     enable = mkEnableOption "dyn-gandi";
 
     timer = lib.mkOption {
@@ -34,37 +34,32 @@ in {
         ]);
       in
         valueType;
-      default = throw "Please specify services.dyn-gandi.settings";
+      default = throw "Please specify dyn-gandi.settings";
     };
   };
 
   config = mkIf cfg.enable {
     environment = {
       systemPackages = [package];
-    }; # TODO: make this architecture independent
 
-    xdg.configFile."dyn-gandi/config.json" = {
-      text = builtins.toJSON cfg.settings;
+      etc."dyn-gandi.json" = {
+        text = builtins.toJSON cfg.settings;
+      };
     };
 
     systemd.services.dyn-gandi = mkIf (cfg.timer
       != null) {
-      Unit = {
-        After = ["network.target"];
-      };
+      script = "${package}/bin/dyn_gandi"; # TODO: add config file via command line options
 
-      Install = {WantedBy = ["default.target"];};
-
-      Service = {
+      serviceConfig = {
         Type = "oneshot";
-        ExecStart = "${package}/bin/dyn_gandi"; # TODO: add config file via command line options
       };
     };
 
     systemd.timers.dyn-gandi = mkIf (cfg.timer
       != null) {
-      Install = {WantedBy = ["timers.target"];};
-      Timer = {
+      wantedBy = ["timers.target"];
+      timerConfig = {
         OnBootSec = "0s";
         OnUnitActiveSec = "${toString cfg.timer}s";
         Unit = "dyn-gandi.service";