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diff --git a/swh/scanner/cli.py b/swh/scanner/cli.py
--- a/swh/scanner/cli.py
+++ b/swh/scanner/cli.py
@@ -6,7 +6,7 @@
# WARNING: do not import unnecessary things here to keep cli startup time under
# control
import os
-from typing import Any, Dict
+from typing import Any, Dict, Optional
import click
@@ -41,17 +41,28 @@
@click.option(
"-C",
"--config-file",
- default=DEFAULT_CONFIG_PATH,
- type=click.Path(exists=True, dir_okay=False, path_type=str),
- help="YAML configuration file",
+ default=None,
+ type=click.Path(exists=False, dir_okay=False, path_type=str),
+ help=f"""YAML configuration file. If absent and cannot load the default one,
+ default parameters are used.
+ Default config path is {DEFAULT_CONFIG_PATH}.
+ Default config values are {DEFAULT_CONFIG}
+ """,
)
@click.pass_context
-def scanner(ctx, config_file: str):
+def scanner(ctx, config_file: Optional[str]):
"""Software Heritage Scanner tools."""
-
- # recursive merge not done by config.read
- conf = config.read_raw_config(config.config_basepath(config_file))
- conf = config.merge_configs(DEFAULT_CONFIG, conf)
+ if config_file is None and config.config_exists(DEFAULT_CONFIG_PATH):
+ config_file = DEFAULT_CONFIG_PATH
+
+ if config_file is None:
+ conf = DEFAULT_CONFIG
+ else:
+ # read_raw_config do not fail on ENOENT
+ if not config.config_exists(config_file):
+ raise FileNotFoundError(config_file)
+ conf = config.read_raw_config(config.config_basepath(config_file))
+ conf = config.merge_configs(DEFAULT_CONFIG, conf)
ctx.ensure_object(dict)
ctx.obj["config"] = conf

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