[PATCH 1/4] sequencer: add "do_fast_forward()" to perform a fast forward

From: Stephan Beyer <redacted>

This code is taken from the sequencer GSoC project:

    git://repo.or.cz/git/sbeyer.git

    (commit e7b8dab0c2a73ade92017a52bb1405ea1534ef20)

but the messages have been changed to be the same as those
displayed by git-rebase--interactive.sh.

Signed-off-by: Christian Couder <redacted>
---
 builtin-sequencer--helper.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/builtin-sequencer--helper.c b/builtin-sequencer--helper.c
index be030bc..0cd7e98 100644
--- a/builtin-sequencer--helper.c
+++ b/builtin-sequencer--helper.c

@@ -171,6 +171,15 @@ static struct commit *get_commit(const char *arg)
 	return lookup_commit_reference(sha1);
 }
 
+static int do_fast_forward(const unsigned char *sha)
+{
+	if (reset_almost_hard(sha))
+		return error("Cannot fast forward to %s", sha1_to_hex(sha));
+	if (verbosity > 1)
+		printf("Fast forward to %s\n", sha1_to_hex(sha));
+	return 0;
+}
+
 static int set_verbosity(int verbose)
 {
 	char tmp[] = "0";

-- 
1.6.4.209.g16b77