flet-client-flutter: adjusting the updater to handle the new cases

Signed-off-by: lucasew <[e-mail]>

pkgs/by-name/fl/flet-client-flutter/git_hashes.json

···
+{}

pkgs/by-name/fl/flet-client-flutter/package.nix

···
 , makeWrapper
 , mimalloc
 , orc
-, yq
-, runCommand
+, python3
+, nix
 , gitUpdater
+, nix-prefetch-git
 , mpv-unwrapped
 , libplacebo
 , _experimental-update-script-combinators
-, flet-client-flutter
 , fletTarget ? "linux"
 }:
 
···
   };
 
   sourceRoot = "${src.name}/client";
+
+  gitHashes = lib.importJSON ./git_hashes.json;
 
   cmakeFlags = [
     "-DMIMALLOC_LIB=${mimalloc}/lib/mimalloc.o"
···
   ;
 
   passthru = {
-    pubspecSource = runCommand "pubspec.lock.json" {
-        buildInputs = [ yq ];
-        inherit (flet-client-flutter) src;
-      } ''
-      cat $src/client/pubspec.lock | yq > $out
-    '';
-
     updateScript = _experimental-update-script-combinators.sequence [
       (gitUpdater { rev-prefix = "v"; })
-      (_experimental-update-script-combinators.copyAttrOutputToFile "flet-client-flutter.pubspecSource" ./pubspec.lock.json)
+      {
+        command = ["env" "PATH=${lib.makeBinPath [(python3.withPackages (p: [p.pyyaml])) nix-prefetch-git nix]}" "python3" ./update-lockfiles.py ];
+        supportedFeatures = ["silent"];
+      }
     ];
   };
 

pkgs/by-name/fl/flet-client-flutter/update-lockfiles.py

···
+from argparse import ArgumentParser
+from pathlib import Path
+import json
+import subprocess
+import yaml
+
+THIS_FOLDER = Path(__file__).parent
+FLAKE_DIR = THIS_FOLDER
+while True:
+    assert str(FLAKE_DIR) != '/'
+    if (FLAKE_DIR / "flake.nix").exists():
+        break
+    FLAKE_DIR = FLAKE_DIR.parent
+
+source = Path(subprocess.run(['nix-build', FLAKE_DIR, '-A', 'flet-client-flutter.src', '--no-out-link'], stdout=subprocess.PIPE).stdout.decode('utf-8').strip())
+assert source.is_absolute()
+
+source_pubspec_lock = source / "client" / "pubspec.lock"
+
+output_pubspec = THIS_FOLDER / "pubspec.lock.json"
+output_git_hashes = THIS_FOLDER / "git_hashes.json"
+
+data = yaml.safe_load(source_pubspec_lock.open('r'))
+output_pubspec.write_text(json.dumps(data, indent=2) + "\n")
+
+output_data = {}
+
+def hash_git(package):
+    print(package)
+    resolved_ref = package['resolved-ref']
+    url = package['url']
+    full_output = subprocess.run(['nix-prefetch-git', '--url', url, '--rev', resolved_ref], stdout=subprocess.PIPE).stdout.decode('utf-8')
+    json_output = json.loads(full_output)
+    return json_output['hash']
+
+for name, package in data['packages'].items():
+    if package['source'] != 'git':
+        continue
+    hash = hash_git(package['description'])
+    output_data[name] = hash
+
+output_git_hashes.write_text(json.dumps(output_data, indent=2) + "\n")