Add a rule to propagate due date from fix version

src/rules/team/__init__.py

@@ -1,4 +1,5 @@
 from .due_date import check_due_date
+from .due_date_by_fixversion import check_due_date_by_fixversion
 from .fixversion_rank import check_fixversion_rank
 from .outcome_version import set_fix_version
 from .parent import check_parent_link
@@ -10,6 +11,7 @@
 
 __all__ = [
     check_due_date,
+    check_due_date_by_fixversion,
     set_fix_version,
     check_parent_link,
     check_priority,

src/rules/team/due_date_by_fixversion.py

@@ -0,0 +1,62 @@
+import operator as op
+from time import strftime
+
+import celpy
+import jira
+
+from utils.cel import issue_as_cel
+from utils.jira import update
+
+today = strftime("%Y-%m-%d")
+
+
+def _earliest_fixversion(issue):
+    fixversions = issue.fields.fixVersions
+    if not fixversions:
+        return None
+    fixversions = [
+        fixversion for fixversion in fixversions if hasattr(fixversion, "releaseDate")
+    ]
+    if not fixversions:
+        return None
+    return sorted(fixversions, key=op.attrgetter("releaseDate"))[0]
+
+
+def check_due_date_by_fixversion(
+    issue: jira.resources.Issue, context: dict, dry_run: bool, ignore: str = ""
+) -> None:
+    if ignore:
+        env = celpy.Environment()
+        program = env.program(env.compile(ignore))
+        if program.evaluate(issue_as_cel(issue)):
+            context["updates"].append(
+                f"! Ignoring {issue.key} for due date by fixVersion rule, per cel expression: {ignore}."
+            )
+            return
+
+    fixversion = _earliest_fixversion(issue)
+    if not fixversion:
+        return
+
+    target_due_date = fixversion.releaseDate
+    target_source = fixversion
+
+    if target_due_date is None:
+        raise ValueError(
+            "Impossible - fixversion due date cannot be None at this location"
+        )
+
+    due_date_id = issue.raw["Context"]["Field Ids"]["Due Date"]
+    due_date = getattr(issue.fields, due_date_id)
+
+    if not due_date or due_date > target_due_date:
+        if not due_date:
+            message = f"  * Setting Due Date to {target_due_date}, inherited from fixVersion {target_source.name}."
+        elif due_date > target_due_date:
+            message = f"  * Pulling in Due Date from {due_date} to {target_due_date}, propagated from fixVersion {target_source.name}."
+
+        context["updates"].append(message)
+        context["comments"].append(message)
+
+        if not dry_run:
+            update(issue, {"fields": {due_date_id: target_due_date}})