respect --no-show-warnings

--no-show-warnings should override the show_warnings setting in
~/.myclirc.

To solve the bug, we need for show_warnings to allow a None value,
rather than only a bool.  None represents no relevant CLI argument being
given.

Author: rolandwalker

changelog.md

@@ -9,6 +9,7 @@ Features
 Bug Fixes
 ---------
 * Correct how password help is rendered in the helpdoc.
+* Respect `--no-show-warnings`, overriding settings in `~/.myclirc`.
 
 
 Internal

mycli/main.py

@@ -194,7 +194,6 @@ def __init__(
         defaults_file: str | None = None,
         login_path: str | None = None,
         auto_vertical_output: bool = False,
-        show_warnings: bool = False,
         warn: bool | None = None,
         myclirc: str = "~/.myclirc",
     ) -> None:
@@ -277,7 +276,7 @@ def __init__(
 
         # read from cli argument or user config file
         self.auto_vertical_output = auto_vertical_output or c["main"].as_bool("auto_vertical_output")
-        self.show_warnings = show_warnings or c["main"].as_bool("show_warnings")
+        self.show_warnings = c["main"].as_bool("show_warnings")
 
         # Write user config if system config wasn't the last config loaded.
         if c.filename not in self.system_config_files and not os.path.exists(myclirc):
@@ -608,6 +607,7 @@ def connect(
         use_keyring: bool | None = None,
         reset_keyring: bool | None = None,
         keepalive_ticks: int | None = None,
+        show_warnings: bool | None = None,
     ) -> None:
         cnf = {
             "database": None,
@@ -637,6 +637,8 @@ def connect(
         ssl_config: dict[str, Any] = ssl or {}
         user_connection_config = self.config_without_package_defaults.get('connection', {})
         self.keepalive_ticks = keepalive_ticks
+        if show_warnings is not None:
+            self.show_warnings = show_warnings
 
         int_port = port and int(port)
         if not int_port:
@@ -2093,9 +2095,10 @@ class CliArgs:
         is_flag=True,
         help='Automatically switch to vertical output mode if the result is wider than the terminal width.',
     )
-    show_warnings: bool = clickdc.option(
+    show_warnings: bool | None = clickdc.option(
         '--show-warnings/--no-show-warnings',
         is_flag=True,
+        default=None,
         clickdc=None,
         help='Automatically show warnings after executing a SQL statement.',
     )
@@ -2517,10 +2520,6 @@ def get_password_from_file(password_file: str | None) -> str | None:
 
     combined_init_cmd = "; ".join(cmd.strip() for cmd in init_cmds if cmd)
 
-    # --show-warnings / --no-show-warnings
-    if cli_args.show_warnings:
-        mycli.show_warnings = cli_args.show_warnings
-
     if cli_args.use_keyring is not None and cli_args.use_keyring.lower() == 'reset':
         use_keyring = True
         reset_keyring = True
@@ -2627,6 +2626,7 @@ def get_password_from_file(password_file: str | None) -> str | None:
         use_keyring=use_keyring,
         reset_keyring=reset_keyring,
         keepalive_ticks=keepalive_ticks,
+        show_warnings=cli_args.show_warnings,
     )
 
     if combined_init_cmd:

test/test_main.py

@@ -460,6 +460,49 @@ def test_output_with_warning_and_show_warnings_disabled(executor):
     assert expected not in result.output
 
 
+@dbtest
+def test_no_show_warnings_overrides_myclirc_setting(executor):
+    runner = CliRunner()
+    sql = 'EXPLAIN SELECT 1'
+    expected = 'select 1'
+
+    with NamedTemporaryFile(prefix=TEMPFILE_PREFIX, mode='w', delete=False) as myclirc:
+        myclirc.write(
+            dedent("""\
+            [main]
+            show_warnings = True
+            """)
+        )
+        myclirc.flush()
+        args = [
+            '--user',
+            USER,
+            '--host',
+            HOST,
+            '--port',
+            PORT,
+            '--password',
+            PASSWORD,
+            '--myclirc',
+            myclirc.name,
+            '--defaults-file',
+            default_config_file,
+            TEST_DATABASE,
+        ]
+
+        result = runner.invoke(click_entrypoint, args=args, input=sql)
+        assert expected in result.output
+
+        result = runner.invoke(click_entrypoint, args=args + ['--no-show-warnings'], input=sql)
+        assert expected not in result.output
+
+    try:
+        if os.path.exists(myclirc.name):
+            os.remove(myclirc.name)
+    except Exception as e:
+        print(f"An error occurred while attempting to delete the file: {e}")
+
+
 @dbtest
 def test_output_with_multiple_warnings_in_single_statement(executor):
     runner = CliRunner()