)
'
+# Setup:
+# L1---L2
+# / \ / \
+# master X ?
+# \ / \ /
+# R1---R2
+#
+# Where:
+# master has two files, named 'b' and 'a'
+# branches L1 and R1 both modify each of the two files in conflicting ways
+#
+# L2 is a merge of R1 into L1; more on it later.
+# R2 is a merge of L1 into R1; more on it later.
+#
+# X is an auto-generated merge-base used when merging L2 and R2.
+# since X is a merge of L1 and R1, it has conflicting versions of each file
+#
+# More about L2 and R2:
+# - both resolve the conflicts in 'b' and 'a' differently
+# - L2 renames 'b' to 'm'
+# - R2 renames 'a' to 'm'
+#
+# In the end, in file 'm' we have four different conflicting files (from
+# two versions of 'b' and two of 'a'). In addition, if
+# merge.conflictstyle is diff3, then the base version also has
+# conflict markers of its own, leading to a total of three levels of
+# conflict markers. This is a pretty weird corner case, but we just want
+# to ensure that we handle it as well as practical.
+
+test_expect_success 'setup nested conflicts' '
+ test_create_repo nested_conflicts &&
+ (
+ cd nested_conflicts &&
+
+ # Create some related files now
+ for i in $(test_seq 1 10)
+ do
+ echo Random base content line $i
+ done >initial &&
+
+ cp initial b_L1 &&
+ cp initial b_R1 &&
+ cp initial b_L2 &&
+ cp initial b_R2 &&
+ cp initial a_L1 &&
+ cp initial a_R1 &&
+ cp initial a_L2 &&
+ cp initial a_R2 &&
+
+ test_write_lines b b_L1 >>b_L1 &&
+ test_write_lines b b_R1 >>b_R1 &&
+ test_write_lines b b_L2 >>b_L2 &&
+ test_write_lines b b_R2 >>b_R2 &&
+ test_write_lines a a_L1 >>a_L1 &&
+ test_write_lines a a_R1 >>a_R1 &&
+ test_write_lines a a_L2 >>a_L2 &&
+ test_write_lines a a_R2 >>a_R2 &&
+
+ # Setup original commit (or merge-base), consisting of
+ # files named "b" and "a"
+ cp initial b &&
+ cp initial a &&
+ echo b >>b &&
+ echo a >>a &&
+ git add b a &&
+ test_tick && git commit -m initial &&
+
+ git branch L &&
+ git branch R &&
+
+ # Handle the left side
+ git checkout L &&
+ mv -f b_L1 b &&
+ mv -f a_L1 a &&
+ git add b a &&
+ test_tick && git commit -m "version L1 of files" &&
+ git tag L1 &&
+
+ # Handle the right side
+ git checkout R &&
+ mv -f b_R1 b &&
+ mv -f a_R1 a &&
+ git add b a &&
+ test_tick && git commit -m "verson R1 of files" &&
+ git tag R1 &&
+
+ # Create first merge on left side
+ git checkout L &&
+ test_must_fail git merge R1 &&
+ mv -f b_L2 b &&
+ mv -f a_L2 a &&
+ git add b a &&
+ git mv b m &&
+ test_tick && git commit -m "left merge, rename b->m" &&
+ git tag L2 &&
+
+ # Create first merge on right side
+ git checkout R &&
+ test_must_fail git merge L1 &&
+ mv -f b_R2 b &&
+ mv -f a_R2 a &&
+ git add b a &&
+ git mv a m &&
+ test_tick && git commit -m "right merge, rename a->m" &&
+ git tag R2
+ )
+'
+
+test_expect_failure 'check nested conflicts' '
+ (
+ cd nested_conflicts &&
+
+ git clean -f &&
+ git checkout L2^0 &&
+
+ # Merge must fail; there is a conflict
+ test_must_fail git -c merge.conflictstyle=diff3 merge -s recursive R2^0 &&
+
+ # Make sure the index has the right number of entries
+ git ls-files -s >out &&
+ test_line_count = 2 out &&
+ git ls-files -u >out &&
+ test_line_count = 2 out &&
+ # Ensure we have the correct number of untracked files
+ git ls-files -o >out &&
+ test_line_count = 1 out &&
+
+ # Create a and b from virtual merge base X
+ git cat-file -p master:a >base &&
+ git cat-file -p L1:a >ours &&
+ git cat-file -p R1:a >theirs &&
+ test_must_fail git merge-file --diff3 \
+ -L "Temporary merge branch 1" \
+ -L "merged common ancestors" \
+ -L "Temporary merge branch 2" \
+ ours \
+ base \
+ theirs &&
+ sed -e "s/^\([<|=>]\)/\1\1/" ours >vmb_a &&
+
+ git cat-file -p master:b >base &&
+ git cat-file -p L1:b >ours &&
+ git cat-file -p R1:b >theirs &&
+ test_must_fail git merge-file --diff3 \
+ -L "Temporary merge branch 1" \
+ -L "merged common ancestors" \
+ -L "Temporary merge branch 2" \
+ ours \
+ base \
+ theirs &&
+ sed -e "s/^\([<|=>]\)/\1\1/" ours >vmb_b &&
+
+ # Compare :2:m to expected values
+ git cat-file -p L2:m >ours &&
+ git cat-file -p R2:b >theirs &&
+ test_must_fail git merge-file --diff3 \
+ -L "HEAD:m" \
+ -L "merged common ancestors:b" \
+ -L "R2^0:b" \
+ ours \
+ vmb_b \
+ theirs &&
+ sed -e "s/^\([<|=>]\)/\1\1/" ours >m_stage_2 &&
+ git cat-file -p :2:m >actual &&
+ test_cmp m_stage_2 actual &&
+
+ # Compare :3:m to expected values
+ git cat-file -p L2:a >ours &&
+ git cat-file -p R2:m >theirs &&
+ test_must_fail git merge-file --diff3 \
+ -L "HEAD:a" \
+ -L "merged common ancestors:a" \
+ -L "R2^0:m" \
+ ours \
+ vmb_a \
+ theirs &&
+ sed -e "s/^\([<|=>]\)/\1\1/" ours >m_stage_3 &&
+ git cat-file -p :3:m >actual &&
+ test_cmp m_stage_3 actual &&
+
+ # Compare m to expected contents
+ >empty &&
+ cp -a m_stage_2 expected_final_m &&
+ test_must_fail git merge-file --diff3 \
+ -L "HEAD" \
+ -L "merged common ancestors" \
+ -L "R2^0" \
+ expected_final_m \
+ empty \
+ m_stage_3 &&
+ test_cmp expected_final_m m
+ )
+'
+
test_done