Sync overrides with CLI overrides

spacy/cli/_util.py

@@ -7,6 +7,7 @@ import srsly
 import hashlib
 import typer
 from click import NoSuchOption
+from click.parser import split_arg_string
 from typer.main import get_command
 from contextlib import contextmanager
 from thinc.config import Config, ConfigValidationError
@@ -38,6 +39,7 @@ commands to check and validate your config files, training and evaluation data,
 and custom model implementations.
 """
 INIT_HELP = """Commands for initializing configs and pipeline packages."""
+OVERRIDES_ENV_VAR = "SPACY_CONFIG_OVERRIDES"
 
 # Wrappers for Typer's annotations. Initially created to set defaults and to
 # keep the names short, but not needed at the moment.
@@ -62,46 +64,41 @@ def setup_cli() -> None:
     command(prog_name=COMMAND)
 
 
-def parse_config_env_overrides(
-    *, prefix: str = "SPACY_CONFIG_", dot: str = "__"
+def parse_config_overrides(
+    args: List[str], env_var: Optional[str] = OVERRIDES_ENV_VAR
 ) -> Dict[str, Any]:
-    """Generate a dictionary of config overrides based on environment variables,
-    e.g. SPACY_CONFIG_TRAINING__BATCH_SIZE=123 overrides the training.batch_size
-    setting.
-
-    prefix (str): The env variable prefix for config overrides.
-    dot (str): String used to represent the "dot", e.g. in training.batch_size.
-    RETURNS (Dict[str, Any]): The parsed dict, keyed by nested config setting.
-    """
-    result = {}
-    for env_key, value in os.environ.items():
-        if env_key.startswith(prefix):
-            opt = env_key[len(prefix) :].lower().replace(dot, ".")
-            if "." in opt:
-                result[opt] = try_json_loads(value)
-    return result
-
-
-def parse_config_overrides(args: List[str], env_vars: bool = True) -> Dict[str, Any]:
     """Generate a dictionary of config overrides based on the extra arguments
     provided on the CLI, e.g. --training.batch_size to override
     "training.batch_size". Arguments without a "." are considered invalid,
     since the config only allows top-level sections to exist.
 
-    args (List[str]): The extra arguments from the command line.
-    env_vars (bool): Include environment variables.
+    env_vars (Optional[str]): Optional environment variable to read from.
     RETURNS (Dict[str, Any]): The parsed dict, keyed by nested config setting.
     """
-    env_overrides = parse_config_env_overrides() if env_vars else {}
-    cli_overrides = {}
+    env_string = os.environ.get(env_var, "") if env_var else ""
+    env_overrides = _parse_overrides(split_arg_string(env_string))
+    cli_overrides = _parse_overrides(args, is_cli=True)
+    if cli_overrides:
+        keys = [k for k in cli_overrides if k not in env_overrides]
+        logger.debug(f"Config overrides from CLI: {keys}")
+    if env_overrides:
+        logger.debug(f"Config overrides from env variables: {list(env_overrides)}")
+    return {**cli_overrides, **env_overrides}
+
+
+def _parse_overrides(args: List[str], is_cli: bool = False) -> Dict[str, Any]:
+    result = {}
     while args:
         opt = args.pop(0)
-        err = f"Invalid CLI argument '{opt}'"
+        err = f"Invalid config override '{opt}'"
         if opt.startswith("--"):  # new argument
             orig_opt = opt
             opt = opt.replace("--", "")
             if "." not in opt:
-                raise NoSuchOption(orig_opt)
+                if is_cli:
+                    raise NoSuchOption(orig_opt)
+                else:
+                    msg.fail(f"{err}: can't override top-level sections", exits=1)
             if "=" in opt:  # we have --opt=value
                 opt, value = opt.split("=", 1)
                 opt = opt.replace("-", "_")
@@ -110,27 +107,18 @@ def parse_config_overrides(args: List[str], env_vars: bool = True) -> Dict[str,
                     value = "true"
                 else:
                     value = args.pop(0)
-            if opt not in env_overrides:
-                cli_overrides[opt] = try_json_loads(value)
+            # Just like we do in the config, we're calling json.loads on the
+            # values. But since they come from the CLI, it'd be unintuitive to
+            # explicitly mark strings with escaped quotes. So we're working
+            # around that here by falling back to a string if parsing fails.
+            # TODO: improve logic to handle simple types like list of strings?
+            try:
+                result[opt] = srsly.json_loads(value)
+            except ValueError:
+                result[opt] = str(value)
         else:
-            msg.fail(f"{err}: override option should start with --", exits=1)
-    if cli_overrides:
-        logger.debug(f"Config overrides from CLI: {list(cli_overrides)}")
-    if env_overrides:
-        logger.debug(f"Config overrides from env variables: {list(env_overrides)}")
-    return {**cli_overrides, **env_overrides}
-
-
-def try_json_loads(value: Any) -> Any:
-    # Just like we do in the config, we're calling json.loads on the
-    # values. But since they come from the CLI, it'd be unintuitive to
-    # explicitly mark strings with escaped quotes. So we're working
-    # around that here by falling back to a string if parsing fails.
-    # TODO: improve logic to handle simple types like list of strings?
-    try:
-        return srsly.json_loads(value)
-    except ValueError:
-        return str(value)
+            msg.fail(f"{err}: name should start with --", exits=1)
+    return result
 
 
 def load_project_config(path: Path, interpolate: bool = True) -> Dict[str, Any]:

spacy/tests/test_cli.py

@@ -6,7 +6,7 @@ from spacy.schemas import ProjectConfigSchema, RecommendationSchema, validate
 from spacy.cli.init_config import init_config, RECOMMENDATIONS
 from spacy.cli._util import validate_project_commands, parse_config_overrides
 from spacy.cli._util import load_project_config, substitute_project_variables
-from spacy.cli._util import string_to_list, parse_config_env_overrides
+from spacy.cli._util import string_to_list, OVERRIDES_ENV_VAR
 from thinc.config import ConfigValidationError
 import srsly
 import os
@@ -342,15 +342,21 @@ def test_parse_config_overrides_invalid_2(args):
 
 
 def test_parse_cli_overrides():
-    prefix = "SPACY_CONFIG_"
-    dot = "__"
-    os.environ[f"{prefix}TRAINING{dot}BATCH_SIZE"] = "123"
-    os.environ[f"{prefix}FOO{dot}BAR{dot}BAZ"] = "hello"
-    os.environ[prefix] = "bad"
-    result = parse_config_env_overrides(prefix=prefix, dot=dot)
-    assert len(result) == 2
-    assert result["training.batch_size"] == 123
-    assert result["foo.bar.baz"] == "hello"
+    os.environ[OVERRIDES_ENV_VAR] = "--x.foo bar --x.bar=12 --x.baz false --y.foo=hello"
+    result = parse_config_overrides([])
+    assert len(result) == 4
+    assert result["x.foo"] == "bar"
+    assert result["x.bar"] == 12
+    assert result["x.baz"] is False
+    assert result["y.foo"] == "hello"
+    os.environ[OVERRIDES_ENV_VAR] = "--x"
+    assert parse_config_overrides([], env_var=None) == {}
+    with pytest.raises(SystemExit):
+        parse_config_overrides([])
+    os.environ[OVERRIDES_ENV_VAR] = "hello world"
+    with pytest.raises(SystemExit):
+        parse_config_overrides([])
+    del os.environ[OVERRIDES_ENV_VAR]
 
 
 @pytest.mark.parametrize("lang", ["en", "nl"])