Update anaconda variables source

Anaconda IsFinal property use to be processed out of ANACONDA_ISFINAL
environmental variable. This commit changes this behaviour to use
RELEASE_TYPE variable out of /etc/os-release instead.

Related change in Fedora spec file:
- https://src.fedoraproject.org/rpms/fedora-release/pull-request/347

Resolves: INSTALLER-4068

pyanaconda/core/product.py

@@ -80,7 +80,18 @@ def get_product_values():
     # .buildstamp, environment, stupid last ditch hardcoded defaults.
     config = configparser.ConfigParser()
     config.add_section("Main")
-    config.set("Main", "IsFinal", os.environ.get("ANACONDA_ISFINAL", "false"))
+
+    # Get IsFinal property from /etc/os-release file
+    with open('/etc/os-release') as file:
+        for line in file:
+            key, value = line.split('=')
+            value = value.strip()
+            if key == 'RELEASE_TYPE':
+                if value == 'release' or value == 'stable':
+                    config.set("Main", "IsFinal", str(True))
+                else:
+                    config.set("Main", "IsFinal", str(False))
+
     config.set("Main", "Product", os.environ.get("ANACONDA_PRODUCTNAME", "anaconda"))
     config.set("Main", "Version", os.environ.get("ANACONDA_PRODUCTVERSION", "bluesky"))
 

tests/unit_tests/pyanaconda_tests/core/test_product.py

@@ -154,7 +154,16 @@ def test_buildstamp_multiple(self, mock_cfp_open):
     @patch("pyanaconda.core.product.configparser.open", side_effect=FileNotFoundError)
     def test_env(self, mock_cfp_open):
         """Test product values loaded from environment variables."""
-        values = get_product_values()
+        # ANACONDA_ISFINAL variable is processed out of /etc/os-release host file
+        FAKE_OS_RELEASE = """\
+NAME="Fedora Linux"
+VERSION="41 (Workstation Edition)"
+RELEASE_TYPE=stable
+ID=fedora
+"""
+        m = mock_open(read_data=FAKE_OS_RELEASE)
+        with patch("builtins.open", m):
+            values = get_product_values()
         expected = ProductData(True, "TestProduct", "rawhide", "testproduct")
         assert values == expected