Allow hyphen in config names

.gitignore

@@ -1,5 +1,7 @@
 # xrlint
+/xrlint-config.*
 /xrlint_config.*
+/notebooks/xrlint-config.*
 /notebooks/xrlint_config.*
 
 # Logs

CHANGES.md

@@ -2,6 +2,12 @@
 
 ## Version 0.5.1 (in development)
 
+- XRLint now also loads default configuration from files named 
+  `xrlint-config.yaml` and `xrlint-config.json`. (#60) 
+
+- The command `xrlint --init` now writes `xrlint-config.yaml`
+  instead of `xrlint_config.yaml`.  
+
 - Enhanced documentation by a new page that compiles
   the code examples in the `examples` folder.
 

docs/cli.md

@@ -1,32 +1,44 @@
 # Command Line Interface
 
 After installation, the `xrlint` command can be used from the terminal. 
-The following are the command's options and arguments:
+The following are the command's usage help including a short description 
+of its options and arguments:
 
 ```
 Usage: xrlint [OPTIONS] [FILES]...
 
   Validate the given dataset FILES.
 
-  Reads configuration from './xrlint_config.*' if such file exists and unless
-  '--no_config_lookup' is set or '--config' is provided. It then validates
-  each dataset in FILES against the configuration. The default dataset patters
-  are '**/*.zarr' and '**/.nc'. FILES may comprise also directories or URLs.
-  The supported URL protocols are the ones supported by xarray. Using remote
-  protocols may require installing additional packages such as S3Fs
-  (https://s3fs.readthedocs.io/) for the 's3' protocol.
+  When executed, XRLint does the following three things:
 
-  If a directory is provided that not matched by any file pattern, it will be
-  traversed recursively. The validation result is dumped to standard output if
-  not otherwise stated by '--output-file'. The output format is 'simple' by
-  default. Other inbuilt formats are 'json' and 'html' which you can specify
-  using the '--format' option.
+  (1) Unless options '--no-config-lookup' or '--config' are used it searches
+  for a default configuration file in the current working directory. Default
+  configuration files are determined by their filename, namely
+  'xrlint_config.py' or 'xrlint-config.<format>', where <format> refers to the
+  filename extensions 'json', 'yaml', and 'yml'. A Python configuration file
+  ('*.py'), is expected to provide XRLInt configuration from a function
+  'export_config()', which may include custom plugins and rules.
+
+  (2) It then validates each dataset in FILES against the configuration. The
+  default dataset patters are '**/*.zarr' and '**/.nc'. FILES may comprise
+  also directories or URLs. The supported URL protocols are the ones supported
+  by xarray. Using remote protocols may require installing additional packages
+  such as S3Fs (https://s3fs.readthedocs.io/) for the 's3' protocol. If a
+  directory is provided that not matched by any file pattern, it will be
+  traversed recursively.
+
+  (3) The validation result is dumped to standard output if not otherwise
+  stated by '--output-file'. The output format is 'simple' by default. Other
+  inbuilt formats are 'json' and 'html' which you can specify using the '--
+  format' option.
+
+  Please refer to the documentation (https://bcdev.github.io/xrlint/) for more
+  information.
 
 Options:
-  --no-config-lookup      Disable use of default configuration from
-                          xrlint_config.*
-  -c, --config FILE       Use this configuration, overriding xrlint_config.*
-                          config options if present
+  --no-config-lookup      Disable use of default configuration files
+  -c, --config FILE       Use this configuration instead of looking for a
+                          default configuration file
   --print-config FILE     Print the configuration for the given file
   --plugin MODULE         Specify plugins. MODULE is the name of Python module
                           that defines an 'export_plugin()' function.
@@ -37,7 +49,9 @@ Options:
   --color / --no-color    Force enabling/disabling of color
   --max-warnings COUNT    Number of warnings to trigger nonzero exit code -
                           default: 5
-  --init                  Write initial configuration file and exit.
+  --init                  Write initial configuration file 'xrlint-
+                          config.yaml' and exit.
   --version               Show the version and exit.
   --help                  Show this message and exit.
+
 ```

docs/config.md

@@ -7,9 +7,9 @@ Many parts have been copied and adjusted as it applies in many similar ways to X
 
 The XRLint configuration file may be named any of the following:
 
-* `xrlint_config.yaml`
-* `xrlint_config.json`
-* `xrlint_config.py`
+* YAML format: `xrlint-config.yaml` (or use extension `.yml`)
+* JSON format: `xrlint-config.json`
+* Python module: `xrlint_config.py` (note the underscore)
 
 It should be placed in the root directory of your project and export 
 an array of [configuration objects](#configuration-objects) or 
@@ -40,7 +40,7 @@ Same using JSON:
 ]
 ```
 
-And as Python script:
+And as Python module:
 
 ```python
 def export_config():

docs/start.md

@@ -27,7 +27,7 @@ Initializing a new project with
 xrlint --init
 ```
 
-writes a configuration file `xrlint_config.yaml` 
+writes a configuration file `xrlint-config.yaml` 
 into the current working directory:
 
 ```yaml

notebooks/xrlint-linter.ipynb

@@ -1924,7 +1924,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.13.1"
+   "version": "3.12.8"
   }
  },
  "nbformat": 4,

tests/cli/test_main.py

@@ -160,8 +160,10 @@ def test_color_no_color(self):
     def test_files_with_invalid_config(self):
         with text_file(DEFAULT_CONFIG_FILE_YAML, self.invalid_config_yaml):
             result = self.xrlint("--no-color", *self.files)
+            # noinspection SpellCheckingInspection
             self.assertEqual(
-                "Error: xrlint_config.yaml: configuration 'recommentet' not found\n",
+                f"Error: {DEFAULT_CONFIG_FILE_YAML}:"
+                " configuration 'recommentet' not found\n",
                 result.output,
             )
             self.assertEqual(1, result.exit_code)

xrlint/cli/constants.py

@@ -4,22 +4,33 @@
 
 from typing import Final
 
-DEFAULT_CONFIG_BASENAME: Final = "xrlint_config"
 
-DEFAULT_CONFIG_FILE_YAML: Final = f"{DEFAULT_CONFIG_BASENAME}.yaml"
-DEFAULT_CONFIG_FILE_JSON: Final = f"{DEFAULT_CONFIG_BASENAME}.json"
-DEFAULT_CONFIG_FILE_PY: Final = f"{DEFAULT_CONFIG_BASENAME}.py"
+_MODULE_BASENAME: Final = "xrlint_config"
+_REGULAR_BASENAME: Final = "xrlint-config"
+
 
 DEFAULT_CONFIG_FILES: Final = [
-    DEFAULT_CONFIG_FILE_YAML,
-    DEFAULT_CONFIG_FILE_JSON,
-    DEFAULT_CONFIG_FILE_PY,
+    # Added in 0.5.1:
+    f"{_REGULAR_BASENAME}.yaml",
+    f"{_REGULAR_BASENAME}.yml",
+    f"{_REGULAR_BASENAME}.json",
+    # Until 0.5.0:
+    f"{_MODULE_BASENAME}.yaml",
+    f"{_MODULE_BASENAME}.yml",
+    f"{_MODULE_BASENAME}.json",
+    f"{_MODULE_BASENAME}.py",
 ]
 
+DEFAULT_CONFIG_FILE_YAML: Final = f"{_REGULAR_BASENAME}.yaml"
 DEFAULT_OUTPUT_FORMAT: Final = "simple"
 DEFAULT_MAX_WARNINGS: Final = 5
 
-INIT_CONFIG_YAML: Final = "- recommended\n"
+INIT_CONFIG_YAML: Final = (
+    "# XRLint configuration file\n"
+    "# See https://bcdev.github.io/xrlint/config/\n"
+    "\n"
+    "- recommended\n"
+)
 
 DEFAULT_GLOBAL_FILES: Final = ["**/*.zarr", "**/*.nc"]
 DEFAULT_GLOBAL_IGNORES: Final = [".git", "node_modules"]

xrlint/cli/main.py

@@ -9,9 +9,9 @@
 # Warning: do not import heavy stuff here, it can
 # slow down commands like "xrlint --help" otherwise.
 from xrlint.cli.constants import (
-    DEFAULT_CONFIG_BASENAME,
     DEFAULT_MAX_WARNINGS,
     DEFAULT_OUTPUT_FORMAT,
+    DEFAULT_CONFIG_FILE_YAML,
 )
 from xrlint.version import version
 
@@ -20,17 +20,14 @@
 @click.option(
     "--no-config-lookup",
     "no_config_lookup",
-    help=f"Disable use of default configuration from {DEFAULT_CONFIG_BASENAME}.*",
+    help="Disable use of default configuration files",
     is_flag=True,
 )
 @click.option(
     "--config",
     "-c",
     "config_path",
-    help=(
-        f"Use this configuration, overriding {DEFAULT_CONFIG_BASENAME}.*"
-        f" config options if present"
-    ),
+    help="Use this configuration instead of looking for a default configuration file",
     metavar="FILE",
 )
 @click.option(
@@ -94,7 +91,7 @@
 @click.option(
     "--init",
     "init_mode",
-    help="Write initial configuration file and exit.",
+    help=f"Write initial configuration file '{DEFAULT_CONFIG_FILE_YAML}' and exit.",
     is_flag=True,
 )
 @click.argument("files", nargs=-1)
@@ -115,22 +112,33 @@ def main(
 ):
     """Validate the given dataset FILES.
 
-    Reads configuration from './xrlint_config.*' if such file
-    exists and unless '--no-config-lookup' is set or '--config' is
-    provided.
-    It then validates each dataset in FILES against the configuration.
+    When executed, XRLint does the following three things:
+
+    (1) Unless options '--no-config-lookup' or '--config' are used
+    it searches for a default configuration file in the current working
+    directory. Default configuration files are determined by their
+    filename, namely 'xrlint_config.py' or 'xrlint-config.<format>',
+    where <format> refers to the filename extensions
+    'json', 'yaml', and 'yml'. A Python configuration file ('*.py'),
+    is expected to provide XRLInt configuration from a function
+    'export_config()', which may include custom plugins and rules.
+
+    (2) It then validates each dataset in FILES against the configuration.
     The default dataset patters are '**/*.zarr' and '**/.nc'.
     FILES may comprise also directories or URLs. The supported URL
     protocols are the ones supported by xarray. Using remote
     protocols may require installing additional packages such as
     S3Fs (https://s3fs.readthedocs.io/) for the 's3' protocol.
-
     If a directory is provided that not matched by any file pattern,
     it will be traversed recursively.
-    The validation result is dumped to standard output if not otherwise
+
+    (3) The validation result is dumped to standard output if not otherwise
     stated by '--output-file'. The output format is 'simple' by default.
     Other inbuilt formats are 'json' and 'html' which you can specify
     using the '--format' option.
+
+    Please refer to the documentation (https://bcdev.github.io/xrlint/)
+    for more information.
     """
     from xrlint.cli.engine import XRLint