Add IMPLEMENTS for the removal of a field in a `troves` section

Change-Id: I42fbb8a2f2150cfbc48e07340ecedea76f41639a

1 files changed, 21 insertions, 0 deletions

diff --git a/yarns.webapp/900-implementations.yarn b/yarns.webapp/900-implementations.yarn
index 6e0b380..24dcf51 100644
--- a/yarns.webapp/900-implementations.yarn
+++ b/yarns.webapp/900-implementations.yarn
@@ -178,6 +178,27 @@ Set a specific field for a `troves` section.
     yarnlib.dump_json_to_file(obj, filename)
     '
 
+Remove a specified field for a `troves` section
+
+    IMPLEMENTS GIVEN (\S+) in (\S+) removes field (\S+) from trove (\S+)
+    cd "$SRCDIR"/yarns.webapp
+    python -c '
+    import os
+    import yarnlib
+
+    MATCH_1, MATCH_2, MATCH_3, MATCH_4 = yarnlib.matches()
+
+    filename = os.path.join(yarnlib.DATADIR, MATCH_2, MATCH_1)
+    obj = yarnlib.load_json_from_file(filename)
+
+    for section in obj:
+        if section["type"] in ["trove", "troves"]:
+            if section["trovehost"] == MATCH_4:
+                del section[MATCH_3]
+
+    yarnlib.dump_json_to_file(obj, filename)
+    '
+
 Set the prefixmap for a Trove in a Lorry Controller configuration
 file. Note that the Trove must already be in the configuration file.