cache from toml must be used with a title

src/scgenerator/cache.py

@@ -65,9 +65,12 @@ class Cache:
         return cls(group)
 
     @classmethod
-    def from_toml(cls, s: str, /, create: bool = True) -> Self:
-        hashed = hashlib.md5(pickle.dumps(sort_dict(tomllib.loads(s)))).hexdigest()
-        group = f"TOML-{hashed}"
+    def from_toml(cls, name: str, toml_str: str, /, create: bool = True) -> Self:
+        hashed = hashlib.md5(pickle.dumps(sort_dict(tomllib.loads(toml_str)))).hexdigest()
+        if len(name) > 50:
+            warnings.warn(f"name {name!r} is longer than 30 characters")
+            name = name[:50]
+        group = f"TOML-{name}-{hashed}"
         if create:
             os.makedirs(CACHE_DIR / group, exist_ok=True)
         return cls(group)

tests/test_cache.py

@@ -51,9 +51,9 @@ def test_toml():
     rin_measurement='./DualComb1GHz_updated_corrected_extrapolated_1GHz_noqn.csv'
     """
 
-    cache1 = Cache.from_toml(s1)
-    cache3 = Cache.from_toml(s3, create=False)
-    assert cache1.dir == Cache.from_toml(s2).dir
+    cache1 = Cache.from_toml("test", s1)
+    cache3 = Cache.from_toml("test", s3, create=False)
+    assert cache1.dir == Cache.from_toml("test", s2).dir
     assert cache1.dir != cache3.dir
     assert cache1.dir.exists()
     cache1.delete()