Bump rdflib dependency to 6.0.1, deprecating local guess_format

rdflib 6.0.1 upgraded `guess_format()` to report JSON-LD (via PRs 1403
and 1408).  With the functionality upstream, this patch moves towards
completing tech. transfer by deprecating the local implementation.

References:
* RDFLib/rdflib#1403
* RDFLib/rdflib#1408

Signed-off-by: Alex Nelson <alexander.nelson@nist.gov>

case_utils/__init__.py

@@ -13,33 +13,13 @@
 
 __version__ = "0.2.1"
 
+import warnings
+
 import rdflib.util
 
 from . import local_uuid
 
 def guess_format(fpath, fmap=None):
-    """
-    This function is a wrapper around rdflib.util.guess_format(), adding that the .json extension should be recognized as JSON-LD.
-
-    :param fpath: File path.
-    :type fpath: string
-
-    :param fmap: Mapper dictionary; see rdflib.util.guess_format() for further description.  Note that as in rdflib 5.0.0, supplying this argument overwrites, not augments, the suffix format map used by rdflib.
-    :type fmap: dict
-
-    :returns: RDF file format, fit for rdflib.Graph.parse() or .serialize(); or, None if file extension not mapped.
-    :rtype: string
-    """
-
-    assert fmap is None or isinstance(fmap, dict), "Type check failed"
-
-    if fmap is None:
-        updated_fmap = {key:rdflib.util.SUFFIX_FORMAT_MAP[key] for key in rdflib.util.SUFFIX_FORMAT_MAP}
-        if not "json" in updated_fmap:
-            updated_fmap["json"] = "json-ld"
-        if not "jsonld" in updated_fmap:
-            updated_fmap["jsonld"] = "json-ld"
-    else:
-        updated_fmap = {k:fmap[k] for k in fmap}
+    warnings.warn("The functionality in case_utils.guess_format is now upstream.  Please revise your code to use rdflib.util.guess_format.  The function arguments remain the same.  case_utils.guess_format will be removed in case_utils 0.4.0.", DeprecationWarning)
 
-    return rdflib.util.guess_format(fpath, updated_fmap)
+    return rdflib.util.guess_format(fpath, fmap)

setup.cfg

@@ -20,7 +20,7 @@ classifiers =
 install_requires =
     pandas
     pyparsing < 3.0.0
-    rdflib >= 6.0.0
+    rdflib >= 6.0.1
     requests
     tabulate
 packages = find:

tests/case_utils/test_guess_format.py

@@ -38,11 +38,9 @@ def test_rdflib_util_guess_format_ttl_default():
 def test_rdflib_util_guess_format_ttl_fmap():
     assert rdflib.util.guess_format(PATH_TO_TTL, FMAP_XHTML_GRDDL) == "turtle", "Failed to recognize .ttl RDF file extension when using fmap"
 
-@pytest.mark.xfail(reason="rdflib 5.0.0 known to not recognize .json", strict=True)
 def test_rdflib_util_guess_format_json():
     assert rdflib.util.guess_format(PATH_TO_JSON) == "json-ld", "Failed to recognize .json RDF file extension"
 
-@pytest.mark.xfail(reason="rdflib 5.0.0 known to not recognize .jsonld", strict=True)
 def test_rdflib_util_guess_format_jsonld():
     assert rdflib.util.guess_format(PATH_TO_JSONLD) == "json-ld", "Failed to recognize .jsonld RDF file extension"