csv_metadata_quality/app.py: Update help text

Use DCTERMS fields where possible.

CHANGELOG.md

@@ -9,6 +9,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixing invalid multi-value separators like `|` and `|||` is no longer class-
 ified as "unsafe" as I have yet to see a case where this was intentional
 
+### Added
+- Configurable directory for AGROVOC requests cache (to allow running the web
+version from Google App Engine where we can only write to /tmp)
+
 ## [0.4.6] - 2021-03-11
 ### Added
 - Validation of dcterms.license field against SPDX license identifiers 

csv_metadata_quality/app.py

@@ -17,7 +17,7 @@ def parse_args(argv):
     parser.add_argument(
         "--agrovoc-fields",
         "-a",
-        help="Comma-separated list of fields to validate against AGROVOC, for example: dc.subject,cg.coverage.country",
+        help="Comma-separated list of fields to validate against AGROVOC, for example: dcterms.subject,cg.coverage.country",
     )
     parser.add_argument(
         "--experimental-checks",
@@ -48,7 +48,7 @@ def parse_args(argv):
     parser.add_argument(
         "--exclude-fields",
         "-x",
-        help="Comma-separated list of fields to skip, for example: dc.contributor.author,dc.identifier.citation",
+        help="Comma-separated list of fields to skip, for example: dc.contributor.author,dcterms.bibliographicCitation",
     )
     args = parser.parse_args()
 

csv_metadata_quality/check.py

@@ -1,3 +1,4 @@
+import os
 import re
 from datetime import datetime, timedelta
 
@@ -242,7 +243,11 @@ def agrovoc(field, field_name):
 
     # enable transparent request cache with thirty days expiry
     expire_after = timedelta(days=30)
-    requests_cache.install_cache("agrovoc-response-cache", expire_after=expire_after)
+    # Allow overriding the location of the requests cache, just in case we are
+    # running in an environment where we can't write to the current working di-
+    # rectory (for example from csv-metadata-quality-web).
+    REQUESTS_CACHE_DIR = os.environ.get("REQUESTS_CACHE_DIR", ".")
+    requests_cache.install_cache(f"{REQUESTS_CACHE_DIR}/agrovoc-response-cache", expire_after=expire_after)
 
     # prune old cache entries
     requests_cache.core.remove_expired_responses()