[PATCHv3 03/10] rev-list: documentation and test for --left/right-only

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Signed-off-by: Michael J Gruber <git@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
 Documentation/git-rev-list.txt       |    2 ++
 Documentation/rev-list-options.txt   |   13 +++++++++++++
 t/t6007-rev-list-cherry-pick-file.sh |   32 ++++++++++++++++++++++++++++----
 3 files changed, 43 insertions(+), 4 deletions(-)

diff --git a/Documentation/git-rev-list.txt b/Documentation/git-rev-list.txt
index 8e1e329..5f47a13 100644
--- a/Documentation/git-rev-list.txt
+++ b/Documentation/git-rev-list.txt
@@ -31,6 +31,8 @@ SYNOPSIS
 	     [ \--parents ]
 	     [ \--timestamp ]
 	     [ \--left-right ]
+	     [ \--left-only ]
+	     [ \--right-only ]
 	     [ \--cherry-pick ]
 	     [ \--encoding[=<encoding>] ]
 	     [ \--(author|committer|grep)=<pattern> ]
diff --git a/Documentation/rev-list-options.txt b/Documentation/rev-list-options.txt
index 44a2ef1..cebba62 100644
--- a/Documentation/rev-list-options.txt
+++ b/Documentation/rev-list-options.txt
@@ -319,6 +319,19 @@ from the other branch (for example, "3rd on b" may be cherry-picked
 from branch A).  With this option, such pairs of commits are
 excluded from the output.
 
+--left-only::
+--right-only::
+
+	List only commits on the respective side of a symmetric range,
+	i.e. only those which would be marked `<` resp. `>` by
+	`--left-right`.
++
+For example, `--cherry-pick --right-only A...B` omits those
+commits from `B` which are in `A` or are patch-equivalent to a commit in
+`A`. In other words, this lists the `{plus}` commits from `git cherry A B`.
+More precisely, `--cherry-pick --right-only --no-merges` gives the exact
+list.
+
 -g::
 --walk-reflogs::
 
diff --git a/t/t6007-rev-list-cherry-pick-file.sh b/t/t6007-rev-list-cherry-pick-file.sh
index 64b72a3..cd089a9 100755
--- a/t/t6007-rev-list-cherry-pick-file.sh
+++ b/t/t6007-rev-list-cherry-pick-file.sh
@@ -4,14 +4,14 @@ test_description='test git rev-list --cherry-pick -- file'
 
 . ./test-lib.sh
 
-# A---B---D
+# A---B---D---F
 #  \
 #   \
 #    C---E
 #
 # B changes a file foo.c, adding a line of text.  C changes foo.c as
 # well as bar.c, but the change in foo.c was identical to change B.
-# D and C change bar in the same way, E differently.
+# D and C change bar in the same way, E and F differently.
 
 test_expect_success setup '
 	echo Hallo > foo &&
@@ -40,7 +40,12 @@ test_expect_success setup '
 	git add bar &&
 	test_tick &&
 	git commit -m "D" &&
-	git tag D
+	git tag D &&
+	echo Nello > bar &&
+	git add bar &&
+	test_tick &&
+	git commit -m "F" &&
+	git tag F
 '
 
 cat >expect <<EOF
@@ -83,11 +88,30 @@ test_expect_success 'bar does not come up empty' '
 '
 
 cat >expect <<EOF
+<tags/F
 >tags/E
 EOF
 
 test_expect_success '--cherry-pick bar does not come up empty (II)' '
-	git rev-list --left-right --cherry-pick D...E -- bar > actual &&
+	git rev-list --left-right --cherry-pick F...E -- bar > actual &&
+	git name-rev --stdin --name-only --refs="*tags/*" \
+		< actual > actual.named &&
+	test_cmp actual.named expect
+'
+
+cat >expect <<EOF
+tags/E
+EOF
+
+test_expect_success '--cherry-pick --right-only' '
+	git rev-list --cherry-pick --right-only F...E -- bar > actual &&
+	git name-rev --stdin --name-only --refs="*tags/*" \
+		< actual > actual.named &&
+	test_cmp actual.named expect
+'
+
+test_expect_success '--cherry-pick --left-only' '
+	git rev-list --cherry-pick --left-only E...F -- bar > actual &&
 	git name-rev --stdin --name-only --refs="*tags/*" \
 		< actual > actual.named &&
 	test_cmp actual.named expect
-- 
1.7.4.1.317.gf445f

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