You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
144 lines
4.0 KiB
144 lines
4.0 KiB
#!/bin/sh |
|
# |
|
# Copyright (c) 2005 Junio C Hamano |
|
# |
|
|
|
test_description='Three way merge with read-tree -m |
|
|
|
This test tries three-way merge with read-tree -m |
|
|
|
There is one ancestor (called O for Original) and two branches A |
|
and B derived from it. We want to do a 3-way merge between A and |
|
B, using O as the common ancestor. |
|
|
|
merge A O B |
|
|
|
Decisions are made by comparing contents of O, A and B pathname |
|
by pathname. The result is determined by the following guiding |
|
principle: |
|
|
|
- If only A does something to it and B does not touch it, take |
|
whatever A does. |
|
|
|
- If only B does something to it and A does not touch it, take |
|
whatever B does. |
|
|
|
- If both A and B does something but in the same way, take |
|
whatever they do. |
|
|
|
- If A and B does something but different things, we need a |
|
3-way merge: |
|
|
|
- We cannot do anything about the following cases: |
|
|
|
* O does not have it. A and B both must be adding to the |
|
same path independently. |
|
|
|
* A deletes it. B must be modifying. |
|
|
|
- Otherwise, A and B are modifying. Run 3-way merge. |
|
|
|
First, the case matrix. |
|
|
|
- Vertical axis is for A'\''s actions. |
|
- Horizontal axis is for B'\''s actions. |
|
|
|
.----------------------------------------------------------------. |
|
| A B | No Action | Delete | Modify | Add | |
|
|------------+------------+------------+------------+------------| |
|
| No Action | | | | | |
|
| | select O | delete | select B | select B | |
|
| | | | | | |
|
|------------+------------+------------+------------+------------| |
|
| Delete | | | ********** | can | |
|
| | delete | delete | merge | not | |
|
| | | | | happen | |
|
|------------+------------+------------+------------+------------| |
|
| Modify | | ********** | ?????????? | can | |
|
| | select A | merge | select A=B | not | |
|
| | | | merge | happen | |
|
|------------+------------+------------+------------+------------| |
|
| Add | | can | can | ?????????? | |
|
| | select A | not | not | select A=B | |
|
| | | happen | happen | merge | |
|
.----------------------------------------------------------------. |
|
|
|
In addition: |
|
|
|
SS: a special case of MM, where A and B makes the same modification. |
|
LL: a special case of AA, where A and B creates the same file. |
|
TT: a special case of MM, where A and B makes mergeable changes. |
|
DF: a special case, where A makes a directory and B makes a file. |
|
|
|
' |
|
. ./test-lib.sh |
|
. ../lib-read-tree-m-3way.sh |
|
|
|
################################################################ |
|
# Try merging and showing the various diffs |
|
|
|
test_expect_success \ |
|
'3-way merge with git-read-tree -m' \ |
|
"git-read-tree -m $tree_O $tree_A $tree_B" |
|
|
|
_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]' |
|
_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40" |
|
test_expect_success \ |
|
'git-ls-files --stage of the merge result' \ |
|
'git-ls-files --stage >current- && |
|
sed -e "s/ $_x40 / X /" <current- >current' |
|
|
|
cat >expected <<\EOF |
|
100644 X 2 AA |
|
100644 X 3 AA |
|
100644 X 2 AN |
|
100644 X 1 DD |
|
100644 X 3 DF |
|
100644 X 2 DF/DF |
|
100644 X 1 DM |
|
100644 X 3 DM |
|
100644 X 1 DN |
|
100644 X 3 DN |
|
100644 X 2 LL |
|
100644 X 3 LL |
|
100644 X 1 MD |
|
100644 X 2 MD |
|
100644 X 1 MM |
|
100644 X 2 MM |
|
100644 X 3 MM |
|
100644 X 0 MN |
|
100644 X 3 NA |
|
100644 X 1 ND |
|
100644 X 2 ND |
|
100644 X 0 NM |
|
100644 X 0 NN |
|
100644 X 0 SS |
|
100644 X 1 TT |
|
100644 X 2 TT |
|
100644 X 3 TT |
|
100644 X 2 Z/AA |
|
100644 X 3 Z/AA |
|
100644 X 2 Z/AN |
|
100644 X 1 Z/DD |
|
100644 X 1 Z/DM |
|
100644 X 3 Z/DM |
|
100644 X 1 Z/DN |
|
100644 X 3 Z/DN |
|
100644 X 1 Z/MD |
|
100644 X 2 Z/MD |
|
100644 X 1 Z/MM |
|
100644 X 2 Z/MM |
|
100644 X 3 Z/MM |
|
100644 X 0 Z/MN |
|
100644 X 3 Z/NA |
|
100644 X 1 Z/ND |
|
100644 X 2 Z/ND |
|
100644 X 0 Z/NM |
|
100644 X 0 Z/NN |
|
EOF |
|
|
|
test_expect_success \ |
|
'validate merge result' \ |
|
'diff current expected' |
|
|
|
test_done
|
|
|