portageq: Allow envvar to treat a trailing * as a wildcard

This matches multiple variables, which is particularly useful in
multilib situations.

Signed-off-by: James Le Cuirot <chewi@gentoo.org>

NEWS

@@ -6,6 +6,13 @@ Release notes take the form of the following optional categories:
 * Bug fixes
 * Cleanups
 
+portage-3.0.68 (UNRELEASED)
+--------------
+
+Features:
+* Allow "portageq envvar" to treat a trailing * as a wildcard, matching multiple
+  variables. Useful for multilib.
+
 portage-3.0.67 (2025-01-22)
 --------------
 

bin/portageq

@@ -877,22 +877,30 @@ try:
                     file=sys.stderr,
                 )
 
-            value = portage.settings.get(arg)
-            if value is None:
-                value = ""
-                exit_status = 1
-
-            if verbose:
-                print(arg + "=" + shlex.quote(value))
+            if arg.endswith("*"):
+                arg = arg[0:-1]
+                keys = [key for key in portage.settings.keys() if key.startswith(arg)]
             else:
-                print(value)
+                keys = (arg,)
+
+            for key in keys:
+                value = portage.settings.get(key)
+                if value is None:
+                    value = ""
+                    exit_status = 1
+
+                if verbose:
+                    print(key + "=" + shlex.quote(value))
+                else:
+                    print(value)
 
         return exit_status
 
     docstrings[
         "envvar"
     ] = """<variable>+
 		Returns a specific environment variable as exists prior to ebuild.sh.
+		Variable names can end with * to match multiple variables.
 		Similar to: emerge --verbose --info | grep -E '^<variable>='
 		"""
     envvar.__doc__ = docstrings["envvar"]

lib/portage/tests/emerge/conftest.py

@@ -536,6 +536,7 @@ def _generate_all_baseline_commands(playground, binhost):
         "EROOT",
         "PORTAGE_CONFIGROOT",
         "PORTAGE_TMPDIR",
+        "CHOST*",
         "USERLAND",
     )
     test_commands["etc-update"] = EtcUpdate()