1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
| | #!/bin/sh
test_description='git rebase tests for -Xsubtree
This test runs git rebase and tests the subtree strategy.
'
. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-rebase.sh
commit_message() {
git log --pretty=format:%s -1 "$1"
}
# There are a few bugs in the rebase with regards to the subtree strategy, and
# this test script tries to document them. First, the following commit history
# is generated (the onelines are shown, time flows from left to right):
#
# master1 - master2 - master3
# \
# README ---------------------- Add subproject master - master4 - files_subtree/master5
#
# Where the merge moves the files master[123].t into the subdirectory
# files_subtree/ and master4 as well as files_subtree/master5 add files to that
# directory directly.
#
# Then, in subsequent test cases, `git filter-branch` is used to distill just
# the commits that touch files_subtree/. To give it a final pre-rebase touch,
# an empty commit is added on top. The pre-rebase commit history looks like
# this:
#
# Add subproject master - master4 - files_subtree/master5 - Empty commit
#
# where the root commit adds three files: master1.t, master2.t and master3.t.
#
# This commit history is then rebased onto `master3` with the
# `-Xsubtree=files_subtree` option in three different ways:
#
# 1. using `--preserve-merges`
# 2. using `--preserve-merges` and --keep-empty
# 3. without specifying a rebase backend
test_expect_success 'setup' '
test_commit README &&
git init files &&
test_commit -C files master1 &&
test_commit -C files master2 &&
test_commit -C files master3 &&
: perform subtree merge into files_subtree/ &&
git fetch files refs/heads/master:refs/heads/files-master &&
git merge -s ours --no-commit --allow-unrelated-histories \
files-master &&
git read-tree --prefix=files_subtree -u files-master &&
git commit -m "Add subproject master" &&
: add two extra commits to rebase &&
test_commit -C files_subtree master4 &&
test_commit files_subtree/master5
'
# FAILURE: Does not preserve master4.
test_expect_failure 'Rebase -Xsubtree --preserve-merges --onto commit 4' '
reset_rebase &&
git checkout -b rebase-preserve-merges-4 master &&
git filter-branch --prune-empty -f --subdirectory-filter files_subtree &&
git commit -m "Empty commit" --allow-empty &&
git rebase -Xsubtree=files_subtree --preserve-merges --onto files-master master &&
verbose test "$(commit_message HEAD~)" = "files_subtree/master4"
'
# FAILURE: Does not preserve master5.
test_expect_failure 'Rebase -Xsubtree --preserve-merges --onto commit 5' '
reset_rebase &&
git checkout -b rebase-preserve-merges-5 master &&
git filter-branch --prune-empty -f --subdirectory-filter files_subtree &&
git commit -m "Empty commit" --allow-empty &&
git rebase -Xsubtree=files_subtree --preserve-merges --onto files-master master &&
verbose test "$(commit_message HEAD)" = "files_subtree/master5"
'
# FAILURE: Does not preserve master4.
test_expect_failure 'Rebase -Xsubtree --keep-empty --preserve-merges --onto commit 4' '
reset_rebase &&
git checkout -b rebase-keep-empty-4 master &&
git filter-branch --prune-empty -f --subdirectory-filter files_subtree &&
git commit -m "Empty commit" --allow-empty &&
git rebase -Xsubtree=files_subtree --keep-empty --preserve-merges --onto files-master master &&
verbose test "$(commit_message HEAD~2)" = "files_subtree/master4"
'
# FAILURE: Does not preserve master5.
test_expect_failure 'Rebase -Xsubtree --keep-empty --preserve-merges --onto commit 5' '
reset_rebase &&
git checkout -b rebase-keep-empty-5 master &&
git filter-branch --prune-empty -f --subdirectory-filter files_subtree &&
git commit -m "Empty commit" --allow-empty &&
git rebase -Xsubtree=files_subtree --keep-empty --preserve-merges --onto files-master master &&
verbose test "$(commit_message HEAD~)" = "files_subtree/master5"
'
# FAILURE: Does not preserve Empty.
test_expect_failure 'Rebase -Xsubtree --keep-empty --preserve-merges --onto empty commit' '
reset_rebase &&
git checkout -b rebase-keep-empty-empty master &&
git filter-branch --prune-empty -f --subdirectory-filter files_subtree &&
git commit -m "Empty commit" --allow-empty &&
git rebase -Xsubtree=files_subtree --keep-empty --preserve-merges --onto files-master master &&
verbose test "$(commit_message HEAD)" = "Empty commit"
'
# FAILURE: fatal: Could not parse object
test_expect_failure 'Rebase -Xsubtree --onto commit 4' '
reset_rebase &&
git checkout -b rebase-onto-4 master &&
git filter-branch --prune-empty -f --subdirectory-filter files_subtree &&
git commit -m "Empty commit" --allow-empty &&
git rebase -Xsubtree=files_subtree --onto files-master master &&
verbose test "$(commit_message HEAD~2)" = "files_subtree/master4"
'
# FAILURE: fatal: Could not parse object
test_expect_failure 'Rebase -Xsubtree --onto commit 5' '
reset_rebase &&
git checkout -b rebase-onto-5 master &&
git filter-branch --prune-empty -f --subdirectory-filter files_subtree &&
git commit -m "Empty commit" --allow-empty &&
git rebase -Xsubtree=files_subtree --onto files-master master &&
verbose test "$(commit_message HEAD~)" = "files_subtree/master5"
'
# FAILURE: fatal: Could not parse object
test_expect_failure 'Rebase -Xsubtree --onto empty commit' '
reset_rebase &&
git checkout -b rebase-onto-empty master &&
git filter-branch --prune-empty -f --subdirectory-filter files_subtree &&
git commit -m "Empty commit" --allow-empty &&
git rebase -Xsubtree=files_subtree --onto files-master master &&
verbose test "$(commit_message HEAD)" = "Empty commit"
'
test_done
|