format-patch: Don't go over merge commits

If the topmost three commits in a branch were merge commits, 'git
format-patch -3' used to output nothing. Since Git can't prepare
patches out of merge commits anyway, don't go over them in the first
place. 'git format-patch -3' now prepares three patches from the
topmost three commits without counting merge commits. Also add a
corresponding test in t4014-format-patch and update documentation.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/git-format-patch.txt b/Documentation/git-format-patch.txt
index 835fb7135b9d159281ef8eb81daf699c6aeec57b..95b8bcc49ed04f2d8e9eb49c233a81d8407d095a 100644 (file)
--- a/Documentation/git-format-patch.txt
+++ b/Documentation/git-format-patch.txt
@@ -73,7 +73,7 @@ OPTIONS
 include::diff-options.txt[]
 
 -<n>::
-       Limits the number of patches to prepare.
+       Prepare patches from the topmost <n> commits.
 
 -o <dir>::
 --output-directory <dir>::

diff --git a/builtin/log.c b/builtin/log.c
index 6208703c061abb868201073795cf516bf81b2602..0093b2d8d8de561512efffe7cc416b1cdfe225dd 100644 (file)
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -1012,8 +1012,7 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
        rev.commit_format = CMIT_FMT_EMAIL;
        rev.verbose_header = 1;
        rev.diff = 1;
-       rev.combine_merges = 0;
-       rev.ignore_merges = 1;
+       rev.no_merges = 1;
        DIFF_OPT_SET(&rev.diffopt, RECURSIVE);
        rev.subject_prefix = fmt_patch_subject_prefix;
        memset(&s_r_opt, 0, sizeof(s_r_opt));
@@ -1184,10 +1183,6 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
                        continue;
                }
 
-               /* ignore merges */
-               if (commit->parents && commit->parents->next)
-                       continue;
-
                if (ignore_if_in_upstream &&
                                has_commit_patch_id(commit, &ids))
                        continue;

diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
index 6321ac88aa65a9c9a9d5b114b01165e687363047..2e78c9e662e8a506802665b97e6b07c22a1b134e 100755 (executable)
--- a/t/t4014-format-patch.sh
+++ b/t/t4014-format-patch.sh
@@ -56,6 +56,22 @@ test_expect_success "format-patch --ignore-if-in-upstream" '
 
 '
 
+test_expect_success "format-patch doesn't consider merge commits" '
+
+       git checkout -b slave master &&
+       echo "Another line" >>file &&
+       test_tick &&
+       git commit -am "Slave change #1" &&
+       echo "Yet another line" >>file &&
+       test_tick &&
+       git commit -am "Slave change #2" &&
+       git checkout -b merger master &&
+       test_tick &&
+       git merge --no-ff slave &&
+       cnt=`git format-patch -3 --stdout | grep "^From " | wc -l` &&
+       test $cnt = 3
+'
+
 test_expect_success "format-patch result applies" '
 
        git checkout -b rebuild-0 master &&