darcs-report
append
apply posthook python <path-to>/darcs-report.py email1 [email2, ..]
apply run-posthook
pull posthook python <path-to>/darcs-report.py email1 [email2, ..]
pull run-posthook
unpull posthook python <path-to>/darcs-report.py email1 [email2, ..]
unpull run-posthook
into your _darcs/prefs/defaults.
tested with darcs version 2.12.0 (release)