homebrew_cask: handle placeholder version from brew --version (#11849)

* homebrew_cask: handle placeholder version from brew --version

When brew is run as the wrong user, git repositories may be owned by
a different user, causing brew --version to output a placeholder like
"Homebrew >= 4.3.0 (shallow or no git repository)" instead of the real
version. The parsed version would then be lower than the 2.6.0 threshold,
causing _brew_cask_command_is_deprecated() to return False and the module
to use the disabled "brew cask" command syntax.

Detect the ">=" prefix in the parsed version and treat it as a modern
installation.

Fixes #4708

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* homebrew_cask: add changelog fragment for #11849

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

changelogs/fragments/11849-homebrew-cask-brew-version.yml

@@ -0,0 +1,4 @@
+bugfixes:
+  - homebrew_cask - fix failure when ``brew --version`` returns a placeholder version string
+    (https://github.com/ansible-collections/community.general/issues/4708,
+    https://github.com/ansible-collections/community.general/pull/11849).

plugins/modules/homebrew_cask.py

@@ -438,14 +438,18 @@ class HomebrewCask:
             return self.brew_version
 
         cmd = [self.brew_path, "--version"]
-
         dummy, out, dummy = self.module.run_command(cmd, check_rc=True)
 
         pattern = r"Homebrew (.*)(\d+\.\d+\.\d+)(-dirty)?"
         rematch = re.search(pattern, out)
         if not rematch:
             self.module.fail_json(msg="Failed to match regex to get brew version", stdout=out)
-        self.brew_version = rematch.groups()[1]
+
+        prefix, version, dummy = rematch.groups()
+        if ">=" in prefix:
+            version = "99.0.0"
+
+        self.brew_version = version
         return self.brew_version
 
     def _brew_cask_command_is_deprecated(self):