incus: port updateScript from nushell to python

pkgs/by-name/in/incus/generic.nix

@@ -128,8 +128,8 @@ buildGoModule rec {
 
     ui = callPackage ./ui.nix { };
 
-    updateScript = writeScript "ovs-update.nu" ''
-      ${./update.nu} ${updateScriptArgs}
+    updateScript = writeScript "ovs-update.py" ''
+      ${./update.py} ${updateScriptArgs}
     '';
   };
 

pkgs/by-name/in/incus/lts.nix

@@ -9,5 +9,5 @@ import ./generic.nix {
     ./0c37b7e3ec65b4d0e166e2127d9f1835320165b8.patch
   ];
   lts = true;
-  updateScriptArgs = "--lts=true --regex '6.0.*'";
+  updateScriptArgs = "--lts --regex '6.0.*'";
 }

pkgs/by-name/in/incus/update.nu

@@ -1,29 +0,0 @@
-#!/usr/bin/env nix-shell
-#!nix-shell -i nu -p nushell common-updater-scripts gnused
-
-def main [--lts = false, --regex: string] {
-  let attr = $"incus(if $lts {"-lts"})"
-  let file = $"(pwd)/pkgs/by-name/in/incus/(if $lts { "lts" } else { "package" }).nix"
-
-  let tags = list-git-tags --url=https://github.com/lxc/incus | lines | sort --natural | str replace v ''
-  let latest_tag = if $regex == null { $tags } else { $tags | find --regex $regex } | last
-  let current_version = nix eval --raw -f default.nix $"($attr).version" | str trim
-
-  if $latest_tag != $current_version {
-    print $"Updating: new ($latest_tag) != old ($current_version)"
-    update-source-version $attr $latest_tag $"--file=($file)"
-
-    let oldVendorHash = nix-instantiate . --eval --strict -A $"($attr).goModules.drvAttrs.outputHash" --json | from json
-    let checkBuild = do { nix-build -A $"($attr).goModules" } | complete
-    let vendorHash = $checkBuild.stderr | lines | str trim | find --regex 'got:[[:space:]]*sha256' | split row ' ' | last
-
-    if $vendorHash != null {
-      open $file | str replace $oldVendorHash $vendorHash | save --force $file
-    } else {
-      print $checkBuild.stderr
-      exit 1
-    }
-  }
-
-  {"lts?": $lts, before: $current_version, after: $latest_tag}
-}

pkgs/by-name/in/incus/update.py

@@ -0,0 +1,87 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i python -p python3 python3Packages.looseversion common-updater-scripts nurl
+
+import argparse
+import json
+import os
+import re
+from looseversion import LooseVersion
+from subprocess import run
+
+parser = argparse.ArgumentParser()
+parser.add_argument("--lts", action="store_true")
+parser.add_argument("--regex")
+args = parser.parse_args()
+
+nixpkgs_path = os.environ["PWD"]
+
+attr = "incus"
+file = f"pkgs/by-name/in/incus/package.nix"
+if args.lts:
+    attr = "incus-lts"
+    file = f"pkgs/by-name/in/incus/lts.nix"
+
+tags = (
+    run(["list-git-tags", "--url=https://github.com/lxc/incus"], capture_output=True)
+    .stdout.decode("utf-8")
+    .splitlines()
+)
+tags = [t.lstrip("v") for t in tags]
+
+latest_version = "0"
+for tag in tags:
+    if args.regex != None and not re.match(args.regex, tag):
+        continue
+
+    if LooseVersion(tag) > LooseVersion(latest_version):
+        latest_version = tag
+
+current_version = (
+    run(
+        ["nix", "eval", "--raw", "-f", "default.nix", f"{attr}.version"],
+        capture_output=True,
+    )
+    .stdout.decode("utf-8")
+    .strip()
+)
+
+if LooseVersion(latest_version) <= LooseVersion(current_version):
+    print("No update available")
+    exit(0)
+
+print(f"Found new version {latest_version} > {current_version}")
+
+run(["update-source-version", attr, latest_version, f"--file={file}"])
+
+current_vendor_hash = (
+    run(
+        [
+            "nix-instantiate",
+            ".",
+            "--eval",
+            "--strict",
+            "-A",
+            f"{attr}.goModules.drvAttrs.outputHash",
+            "--json",
+        ],
+        capture_output=True,
+    )
+    .stdout.decode("utf-8")
+    .strip()
+    .strip('"')
+)
+
+latest_vendor_hash = (
+    run(
+        ["nurl", "--expr", f"(import {nixpkgs_path} {{}}).{attr}.goModules"],
+        capture_output=True,
+    )
+    .stdout.decode("utf-8")
+    .strip()
+)
+
+with open(file, "r+") as f:
+    file_content = f.read()
+    file_content = re.sub(current_vendor_hash, latest_vendor_hash, file_content)
+    f.seek(0)
+    f.write(file_content)