From: Phillip Wood <phillip.w...@dunelm.org.uk>

If there are empty commits on the left hand side of $upstream...HEAD
then the empty commits on the right hand side that we want to keep are
pruned because they are marked as cherry-picks. Fix this by keeping
the commits that are empty or are not marked as cherry-picks.

Signed-off-by: Phillip Wood <phillip.w...@dunelm.org.uk>
---
 sequencer.c                       | 30 ++++++++++++++++--------------
 t/t3421-rebase-topology-linear.sh |  4 ++--
 2 files changed, 18 insertions(+), 16 deletions(-)

diff --git a/sequencer.c b/sequencer.c
index d8cc63dbe4..da87c390ed 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -2975,14 +2975,15 @@ static int make_script_with_merges(struct 
pretty_print_context *pp,
         */
        while ((commit = get_revision(revs))) {
                struct commit_list *to_merge;
-               int is_octopus;
+               int is_octopus, is_empty;
                const char *p1, *p2;
                struct object_id *oid;
 
                tail = &commit_list_insert(commit, tail)->next;
                oidset_insert(&interesting, &commit->object.oid);
 
-               if ((commit->object.flags & PATCHSAME))
+               is_empty = is_original_commit_empty(commit);
+               if (!is_empty && (commit->object.flags & PATCHSAME))
                        continue;
 
                strbuf_reset(&oneline);
@@ -2992,7 +2993,7 @@ static int make_script_with_merges(struct 
pretty_print_context *pp,
                if (!to_merge) {
                        /* non-merge commit: easy case */
                        strbuf_reset(&buf);
-                       if (!keep_empty && is_original_commit_empty(commit))
+                       if (!keep_empty && is_empty)
                                strbuf_addf(&buf, "%c ", comment_line_char);
                        strbuf_addf(&buf, "%s %s %s", cmd_pick,
                                    oid_to_hex(&commit->object.oid),
@@ -3172,12 +3173,9 @@ int sequencer_make_script(FILE *out, int argc, const 
char **argv,
 
        init_revisions(&revs, NULL);
        revs.verbose_header = 1;
-       if (recreate_merges)
-               revs.cherry_mark = 1;
-       else {
+       if (!recreate_merges)
                revs.max_parents = 1;
-               revs.cherry_pick = 1;
-       }
+       revs.cherry_mark = 1;
        revs.limited = 1;
        revs.reverse = 1;
        revs.right_only = 1;
@@ -3205,14 +3203,18 @@ int sequencer_make_script(FILE *out, int argc, const 
char **argv,
                return make_script_with_merges(&pp, &revs, out, flags);
 
        while ((commit = get_revision(&revs))) {
+               int is_empty  = is_original_commit_empty(commit);
+
                strbuf_reset(&buf);
-               if (!keep_empty && is_original_commit_empty(commit))
+               if (!keep_empty && is_empty)
                        strbuf_addf(&buf, "%c ", comment_line_char);
-               strbuf_addf(&buf, "%s %s ", insn,
-                           oid_to_hex(&commit->object.oid));
-               pretty_print_commit(&pp, commit, &buf);
-               strbuf_addch(&buf, '\n');
-               fputs(buf.buf, out);
+               if (is_empty || !(commit->object.flags & PATCHSAME)) {
+                       strbuf_addf(&buf, "%s %s ", insn,
+                                   oid_to_hex(&commit->object.oid));
+                       pretty_print_commit(&pp, commit, &buf);
+                       strbuf_addch(&buf, '\n');
+                       fputs(buf.buf, out);
+               }
        }
        strbuf_release(&buf);
        return 0;
diff --git a/t/t3421-rebase-topology-linear.sh 
b/t/t3421-rebase-topology-linear.sh
index cb7f176f1d..7384010075 100755
--- a/t/t3421-rebase-topology-linear.sh
+++ b/t/t3421-rebase-topology-linear.sh
@@ -215,9 +215,9 @@ test_run_rebase () {
 }
 test_run_rebase success ''
 test_run_rebase failure -m
-test_run_rebase failure -i
+test_run_rebase success -i
 test_run_rebase failure -p
-test_run_rebase failure --recreate-merges
+test_run_rebase success --recreate-merges
 
 #       m
 #      /
-- 
2.16.2

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