Add conan config show <conf> command

conan/cli/commands/config.py

@@ -66,3 +66,13 @@ def config_list(conan_api, parser, subparser, *args):
     """
     parser.parse_args(*args)
     return BUILT_IN_CONFS
+
+
+@conan_subcommand(formatters={"text": list_text_formatter, "json": default_json_formatter})
+def config_get(conan_api, parser, subparser, *args):
+    """
+    Get the value of the specified conf
+    """
+    subparser.add_argument('conf', help='Conf item for which to query its value')
+    args = parser.parse_args(*args)
+    return {args.conf: conan_api.config.get(args.conf)}

conans/model/conf.py

@@ -475,7 +475,7 @@ def __bool__(self):
 
     def get(self, conf_name, default=None, check_type=None):
         """
-        Get the value of the  conf name requested and convert it to the [type]-like passed.
+        Get the value of the conf name requested and convert it to the [type]-like passed.
         """
         pattern, name = self._split_pattern_name(conf_name)
         return self._pattern_confs.get(pattern, Conf()).get(name, default=default,

conans/test/integration/command/config_test.py

@@ -108,3 +108,13 @@ def _assert_config_not_exists(path):
     _assert_config_exists("foo")
 
     os.listdir(tc.current_folder)
+
+
+def test_config_get():
+    globalconf = textwrap.dedent("""
+    tools.build:jobs=42
+    """)
+    tc = TestClient()
+    tc.save_home({"global.conf": globalconf})
+    tc.run("config get tools.build:jobs")
+    assert "42" in tc.out