Add conf validation script

validation/README.md

+# Validation du fichier de configuration
+
+Un script Python pour valider le fichier de configuration du badge Validata.
+
+## Pré-requis
+
+Pour installer les dépendances :
+
+```bash
+pip install -r requirements.txt
+```
+
+## Utilisation
+
+```bash
+python3 validate_conf.py ../badge_conf.md
+```
+
+En cas d'erreur, celle-ci est affichée. Le code de retour du script vaut `0` si aucune erreur n'est détectée, et `1` sinon.
\ No newline at end of file

validation/requirements.txt

+jsonschema==3.0.1
+toml==0.10.0

validation/schema.json

+{
+  "$id": "https://git.opendatafrance.net/validata/validata-badge/raw/master/validation/schema.json",
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "ValidataBadgeConfiguration",
+  "type": "object",
+  "properties": {
+    "body": {
+      "type": "object",
+      "properties": {
+        "acceptability-threshold": {
+          "type": "number",
+          "description": "Seuil d'acceptabilité",
+          "minimum": 0,
+          "maximum": 1
+        },
+        "errors-weight": {
+          "type": "object",
+          "properties": {
+            "pattern-constraint": {
+              "type": "number",
+              "minimum": 0,
+              "maximum": 1
+            },
+            "maximum-length-constraint": {
+              "type": "number",
+              "minimum": 0,
+              "maximum": 1
+            }
+          },
+          "required": ["pattern-constraint", "maximum-length-constraint"]
+        }
+      },
+      "required": ["acceptability-threshold", "errors-weight"]
+    }
+  },
+  "required": ["body"]
+}

validation/validate_conf.py

+#!/usr/bin/env python3
+
+import argparse
+import json
+import sys
+from pathlib import Path
+
+import toml
+from jsonschema import Draft7Validator
+from jsonschema.exceptions import best_match
+
+
+def main():
+    """Validate configuration file"""
+    parser = argparse.ArgumentParser(description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter)
+    parser.add_argument('conf_file', type=Path, help='path of badge config file')
+    args = parser.parse_args()
+
+    conf_file = args.conf_file
+    if not conf_file.exists():
+        parser.error("Configuration file {!r} not found".format(str(conf_file)))
+
+    try:
+        conf = toml.load(str(conf_file))
+    except toml.decoder.TomlDecodeError as exc:
+        print(exc)
+        return 1
+
+    with (Path(__file__).parent / "schema.json").open() as fp:
+        schema = json.load(fp)
+
+    error = best_match(Draft7Validator(schema).iter_errors(conf))
+    if error is not None:
+        print(error)
+        return 1
+
+    return 0
+
+
+if __name__ == '__main__':
+    sys.exit(main())