git-am -s will avoid duplicating the last signature
in a patch.
But given a developer creates a patch, send it around for
acks/other signoffs, collects signatures and then does
a git am -s on a different branch, this sort of sign-off
chain is possible:
Signed-off-by: Original Developer <[email protected]>
Acked-by: Random Developer <[email protected]>
Signed-off-by: Original Developer <[email protected]>
Should there be an option to avoid duplicate signatures
in a sequence where an author can git-am the same patch?
sequencer.c:append_signoff() has a flag for APPEND_SIGNOFF_DEDUP
sequencer.c:void append_signoff(struct strbuf *msgbuf, int ignore_footer,
unsigned flag)
but
builtin/commit.c: append_signoff(&sb, ignore_non_trailer(&sb), 0);
doesn't have an optional use mechanism available.