feat: add aurweb-config console script

This can be used to update config values for the entirety
of a config. When config values are set through this tool,
$AUR_CONFIG is overridden with a copy of the config file
with all sections and options found in $AUR_CONFIG
+ $AUR_CONFIG_DEFAULTS.

Signed-off-by: Kevin Morris <kevr@0cost.org>

test/test_config.py

@@ -1,4 +1,16 @@
+import configparser
+import io
+import os
+import re
+
+from unittest import mock
+
 from aurweb import config
+from aurweb.scripts.config import main
+
+
+def noop(*args, **kwargs) -> None:
+    return
 
 
 def test_get():
@@ -11,3 +23,116 @@ def test_getboolean():
 
 def test_getint():
     assert config.getint("options", "disable_http_login") == 0
+
+
+def mock_config_get():
+    config_get = config.get
+
+    def _mock_config_get(section: str, option: str):
+        if section == "options":
+            if option == "salt_rounds":
+                return "666"
+        return config_get(section, option)
+    return _mock_config_get
+
+
+@mock.patch("aurweb.config.get", side_effect=mock_config_get())
+def test_config_main_get(get: str):
+    stdout = io.StringIO()
+    args = ["aurweb-config", "get", "options", "salt_rounds"]
+    with mock.patch("sys.argv", args):
+        with mock.patch("sys.stdout", stdout):
+            main()
+
+    expected = "666"
+    assert stdout.getvalue().strip() == expected
+
+
+@mock.patch("aurweb.config.get", side_effect=mock_config_get())
+def test_config_main_get_unknown_section(get: str):
+    stderr = io.StringIO()
+    args = ["aurweb-config", "get", "fakeblahblah", "salt_rounds"]
+    with mock.patch("sys.argv", args):
+        with mock.patch("sys.stderr", stderr):
+            main()
+
+    # With an invalid section, we should get a usage error.
+    expected = r'^error: no section found$'
+    assert re.match(expected, stderr.getvalue().strip())
+
+
+@mock.patch("aurweb.config.get", side_effect=mock_config_get())
+def test_config_main_get_unknown_option(get: str):
+    stderr = io.StringIO()
+    args = ["aurweb-config", "get", "options", "fakeblahblah"]
+    with mock.patch("sys.argv", args):
+        with mock.patch("sys.stderr", stderr):
+            main()
+
+    expected = "error: no option found"
+    assert stderr.getvalue().strip() == expected
+
+
+@mock.patch("aurweb.config.save", side_effect=noop)
+def test_config_main_set(save: None):
+    data = None
+
+    def mock_replace_key(section: str, option: str, value: str) -> None:
+        nonlocal data
+        data = value
+
+    args = ["aurweb-config", "set", "options", "salt_rounds", "666"]
+    with mock.patch("sys.argv", args):
+        with mock.patch("aurweb.config.replace_key",
+                        side_effect=mock_replace_key):
+            main()
+
+    expected = "666"
+    assert data == expected
+
+
+def test_config_main_set_immutable():
+    data = None
+
+    def mock_replace_key(section: str, option: str, value: str) -> None:
+        nonlocal data
+        data = value
+
+    args = ["aurweb-config", "set", "options", "salt_rounds", "666"]
+    with mock.patch.dict(os.environ, {"AUR_CONFIG_IMMUTABLE": "1"}):
+        with mock.patch("sys.argv", args):
+            with mock.patch("aurweb.config.replace_key",
+                            side_effect=mock_replace_key):
+                main()
+
+    expected = None
+    assert data == expected
+
+
+def test_config_main_set_invalid_value():
+    stderr = io.StringIO()
+
+    args = ["aurweb-config", "set", "options", "salt_rounds"]
+    with mock.patch("sys.argv", args):
+        with mock.patch("sys.stderr", stderr):
+            main()
+
+    expected = "error: no value provided"
+    assert stderr.getvalue().strip() == expected
+
+
+@mock.patch("aurweb.config.save", side_effect=noop)
+def test_config_main_set_unknown_section(save: None):
+    stderr = io.StringIO()
+
+    def mock_replace_key(section: str, option: str, value: str) -> None:
+        raise configparser.NoSectionError(section=section)
+
+    args = ["aurweb-config", "set", "options", "salt_rounds", "666"]
+    with mock.patch("sys.argv", args):
+        with mock.patch("sys.stderr", stderr):
+            with mock.patch("aurweb.config.replace_key",
+                            side_effect=mock_replace_key):
+                main()
+
+    assert stderr.getvalue().strip() == "error: no section found"