asterisk: add update script

pkgs/servers/asterisk/default.nix

@@ -90,7 +90,16 @@ let
     sha256 = "1s9idx2miwk178sa731ig9r4fzx4gy1q8xazfqyd7q4lfd70s1cy";
   };
 
-in rec {
+  # auto-generated by update.py
+  versions = lib.mapAttrs (_: {version, sha256}: common {
+    inherit version sha256;
+    externals = {
+      "externals_cache/pjproject-2.10.tar.bz2" = pjproject_2_10;
+      "addons/mp3" = mp3-202;
+    };
+  }) (builtins.fromJSON (builtins.readFile ./versions.json));
+
+in {
   # Supported releases (as of 2020-10-26).
   # Source: https://wiki.asterisk.org/wiki/display/AST/Asterisk+Versions
   # Exact version can be found at https://www.asterisk.org/downloads/asterisk/all-asterisk-versions/
@@ -100,43 +109,8 @@ in rec {
   # 16.x    LTS        2018-10-09  2022-10-09  2023-10-09
   # 17.x    Standard   2019-10-28  2020-10-28  2021-10-28
   # 18.x    LTS        2020-10-20  2024-10-20  2025-10-20
-  asterisk-lts = asterisk_18;
-  asterisk-stable = asterisk_18;
-  asterisk = asterisk_18;
+  asterisk-lts = versions.asterisk_18;
+  asterisk-stable = versions.asterisk_18;
+  asterisk = versions.asterisk_18;
 
-  asterisk_13 = common {
-    version = "13.38.2";
-    sha256 = "1v7wgsa9vf7qycg3xpvmn2bkandkfh3x15pr8ylg0w0gvfkkf5b9";
-    externals = {
-      "externals_cache/pjproject-2.10.tar.bz2" = pjproject_2_10;
-      "addons/mp3" = mp3-202;
-    };
-  };
-
-  asterisk_16 = common {
-    version = "16.17.0";
-    sha256 = "1bzlsk9k735qf8a693b6sa548my7m9ahavmdicwmc14px70wrvnw";
-    externals = {
-      "externals_cache/pjproject-2.10.tar.bz2" = pjproject_2_10;
-      "addons/mp3" = mp3-202;
-    };
-  };
-
-  asterisk_17 = common {
-    version = "17.9.3";
-    sha256 = "0nhk0izrxx24pz806fwnhidjmciwrkcrsvxvhrdvibiqyvfk8yk7";
-    externals = {
-      "externals_cache/pjproject-2.10.tar.bz2" = pjproject_2_10;
-      "addons/mp3" = mp3-202;
-    };
-  };
-
-  asterisk_18 = common {
-    version = "18.3.0";
-    sha256 = "1xb953i9ay82vcdv8izi5dd5xnspcsvg10ajiyph377jw2xnd5fb";
-    externals = {
-      "externals_cache/pjproject-2.10.tar.bz2" = pjproject_2_10;
-      "addons/mp3" = mp3-202;
-    };
-  };
-}
+} // versions

pkgs/servers/asterisk/update.py

@@ -0,0 +1,36 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i python3 -p python39 python39.pkgs.packaging python39.pkgs.beautifulsoup4 python39.pkgs.requests
+from packaging import version
+from bs4 import BeautifulSoup
+import re, requests, json
+
+URL = "https://downloads.asterisk.org/pub/telephony/asterisk"
+
+page = requests.get(URL)
+changelog = re.compile("^ChangeLog-\d+\.\d+\.\d+$")
+changelogs = [a.get_text() for a in BeautifulSoup(page.text, 'html.parser').find_all('a') if changelog.match(a.get_text())]
+major_versions = {}
+for changelog in changelogs:
+    v = version.parse(changelog.removeprefix("ChangeLog-"))
+    major_versions.setdefault(v.major, []).append(v)
+
+out = {}
+for mv in major_versions.keys():
+    v = max(major_versions[mv])
+    sha = requests.get(f"{URL}/asterisk-{v}.sha256").text.split()[0]
+    out["asterisk_" + str(mv)] = {
+        "version": str(v),
+        "sha256": sha
+    }
+
+try:
+    with open("versions.json", "r") as in_file:
+        in_data = json.loads(in_file.read())
+        for v in in_data.keys():
+            print(v + ":", in_data[v]["version"], "->", out[v]["version"])
+except:
+    # nice to have for the PR, not a requirement
+    pass
+
+with open("versions.json", "w") as out_file:
+    out_file.write(json.dumps(out, sort_keys=True, indent=2))

pkgs/servers/asterisk/versions.json

@@ -0,0 +1,18 @@
+{
+  "asterisk_13": {
+    "sha256": "1v7wgsa9vf7qycg3xpvmn2bkandkfh3x15pr8ylg0w0gvfkkf5b9",
+    "version": "13.38.2"
+  },
+  "asterisk_16": {
+    "sha256": "1bzlsk9k735qf8a693b6sa548my7m9ahavmdicwmc14px70wrvnw",
+    "version": "16.17.0"
+  },
+  "asterisk_17": {
+    "sha256": "0nhk0izrxx24pz806fwnhidjmciwrkcrsvxvhrdvibiqyvfk8yk7",
+    "version": "17.9.3"
+  },
+  "asterisk_18": {
+    "sha256": "1xb953i9ay82vcdv8izi5dd5xnspcsvg10ajiyph377jw2xnd5fb",
+    "version": "18.3.0"
+  }
+}