From: Derrick Stolee <dstolee@xxxxxxxxxxxxx>
A previous test in t4215-log-skewed-merges.sh was added to demonstrate
exactly the topology of a reported failure in "git log --graph". While
investigating the fix, we realized that multiple edges that could
collapse with horizontal lines were not doing so.
Specifically, examine this section of the graph:
| | | | | | * 7_M4
| |_|_|_|_|/|\
|/| | | | |/ /
| | | | |/| /
| | | |/| |/
| | |/| |/|
| |/| |/| |
| | |/| | |
| | * | | | 7_G
Document this behavior with a test. This behavior is new, as the
behavior in v2.24.1 has the following output:
| | | | | | *-. 7_M4
| | | | | | |\ \
| |_|_|_|_|/ / /
|/| | | | | / /
| | |_|_|_|/ /
| |/| | | | /
| | | |_|_|/
| | |/| | |
| | * | | | 7_G
The behavior changed logically in 479db18b ("graph: smooth appearance
of collapsing edges on commit lines", 2019-10-15), but was actually
broken due to an assert() bug in 458152cc ("graph: example of graph
output that can be simplified", 2019-10-15). A future change could
modify this behavior to do the following instead:
| | | | | | * 7_M4
| |_|_|_|_|/|\
|/| | | | |/ /
| | |_|_|/| /
| |/| | | |/
| | | |_|/|
| | |/| | |
| | * | | | 7_G
Signed-off-by: Derrick Stolee <dstolee@xxxxxxxxxxxxx>
---
t/t4215-log-skewed-merges.sh | 63 ++++++++++++++++++++++++++++++++++++
1 file changed, 63 insertions(+)
diff --git a/t/t4215-log-skewed-merges.sh b/t/t4215-log-skewed-merges.sh
index ddf6f6f5d3..be2c24564b 100755
--- a/t/t4215-log-skewed-merges.sh
+++ b/t/t4215-log-skewed-merges.sh
@@ -282,4 +282,67 @@ test_expect_success 'log --graph with multiple tips' '
EOF
'
+test_expect_success 'log --graph with multiple tips' '
+ git checkout --orphan 7_1 &&
+ test_commit 7_A &&
+ test_commit 7_B &&
+ test_commit 7_C &&
+ git checkout -b 7_2 7_1~2 &&
+ test_commit 7_D &&
+ test_commit 7_E &&
+ git checkout -b 7_3 7_1~1 &&
+ test_commit 7_F &&
+ test_commit 7_G &&
+ git checkout -b 7_4 7_2~1 &&
+ test_commit 7_H &&
+ git checkout -b 7_5 7_1~2 &&
+ test_commit 7_I &&
+ git checkout -b 7_6 7_3~1 &&
+ test_commit 7_J &&
+ git checkout -b M_1 7_1 &&
+ git merge --no-ff 7_2 -m 7_M1 &&
+ git checkout -b M_3 7_3 &&
+ git merge --no-ff 7_4 -m 7_M2 &&
+ git checkout -b M_5 7_5 &&
+ git merge --no-ff 7_6 -m 7_M3 &&
+ git checkout -b M_7 7_1 &&
+ git merge --no-ff 7_2 7_3 -m 7_M4 &&
+
+ check_graph M_1 M_3 M_5 M_7 <<-\EOF
+ * 7_M1
+ |\
+ | | * 7_M2
+ | | |\
+ | | | * 7_H
+ | | | | * 7_M3
+ | | | | |\
+ | | | | | * 7_J
+ | | | | * | 7_I
+ | | | | | | * 7_M4
+ | |_|_|_|_|/|\
+ |/| | | | |/ /
+ | | | | |/| /
+ | | | |/| |/
+ | | |/| |/|
+ | |/| |/| |
+ | | |/| | |
+ | | * | | | 7_G
+ | | | |_|/
+ | | |/| |
+ | | * | | 7_F
+ | * | | | 7_E
+ | | |/ /
+ | |/| |
+ | * | | 7_D
+ | | |/
+ | |/|
+ * | | 7_C
+ | |/
+ |/|
+ * | 7_B
+ |/
+ * 7_A
+ EOF
+'
+
test_done
--
gitgitgadget
