| #!/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 |
| . "$TEST_DIRECTORY"/lib-read-tree.sh |
| . "$TEST_DIRECTORY"/lib-read-tree-m-3way.sh |
| |
| ################################################################ |
| # Trivial "majority when 3 stages exist" merge plus #2ALT, #3ALT |
| # and #5ALT trivial merges. |
| |
| cat >expected <<\EOF |
| 100644 X 2 AA |
| 100644 X 3 AA |
| 100644 X 0 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 0 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 0 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 0 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 0 Z/NA |
| 100644 X 1 Z/ND |
| 100644 X 2 Z/ND |
| 100644 X 0 Z/NM |
| 100644 X 0 Z/NN |
| EOF |
| |
| check_result () { |
| git ls-files --stage | sed -e 's/ '"$_x40"' / X /' >current && |
| test_cmp expected current |
| } |
| |
| # This is done on an empty work directory, which is the normal |
| # merge person behaviour. |
| test_expect_success \ |
| '3-way merge with git read-tree -m, empty cache' \ |
| "rm -fr [NDMALTS][NDMALTSF] Z && |
| rm .git/index && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B && |
| check_result" |
| |
| # This starts out with the first head, which is the normal |
| # patch submitter behaviour. |
| test_expect_success \ |
| '3-way merge with git read-tree -m, match H' \ |
| "rm -fr [NDMALTS][NDMALTSF] Z && |
| rm .git/index && |
| read_tree_must_succeed $tree_A && |
| git checkout-index -f -u -a && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B && |
| check_result" |
| |
| : <<\END_OF_CASE_TABLE |
| |
| We have so far tested only empty index and clean-and-matching-A index |
| case which are trivial. Make sure index requirements are also |
| checked. |
| |
| "git read-tree -m O A B" |
| |
| O A B result index requirements |
| ------------------------------------------------------------------- |
| 1 missing missing missing - must not exist. |
| ------------------------------------------------------------------ |
| 2 missing missing exists take B* must match B, if exists. |
| ------------------------------------------------------------------ |
| 3 missing exists missing take A* must match A, if exists. |
| ------------------------------------------------------------------ |
| 4 missing exists A!=B no merge must match A and be |
| up-to-date, if exists. |
| ------------------------------------------------------------------ |
| 5 missing exists A==B take A must match A, if exists. |
| ------------------------------------------------------------------ |
| 6 exists missing missing remove must not exist. |
| ------------------------------------------------------------------ |
| 7 exists missing O!=B no merge must not exist. |
| ------------------------------------------------------------------ |
| 8 exists missing O==B remove must not exist. |
| ------------------------------------------------------------------ |
| 9 exists O!=A missing no merge must match A and be |
| up-to-date, if exists. |
| ------------------------------------------------------------------ |
| 10 exists O==A missing no merge must match A |
| ------------------------------------------------------------------ |
| 11 exists O!=A O!=B no merge must match A and be |
| A!=B up-to-date, if exists. |
| ------------------------------------------------------------------ |
| 12 exists O!=A O!=B take A must match A, if exists. |
| A==B |
| ------------------------------------------------------------------ |
| 13 exists O!=A O==B take A must match A, if exists. |
| ------------------------------------------------------------------ |
| 14 exists O==A O!=B take B if exists, must either (1) |
| match A and be up-to-date, |
| or (2) match B. |
| ------------------------------------------------------------------ |
| 15 exists O==A O==B take B must match A if exists. |
| ------------------------------------------------------------------ |
| 16 exists O==A O==B barf must match A if exists. |
| *multi* in one in another |
| ------------------------------------------------------------------- |
| |
| Note: we need to be careful in case 2 and 3. The tree A may contain |
| DF (file) when tree B require DF to be a directory by having DF/DF |
| (file). |
| |
| END_OF_CASE_TABLE |
| |
| test_expect_success '1 - must not have an entry not in A.' " |
| rm -f .git/index XX && |
| echo XX >XX && |
| git update-index --add XX && |
| read_tree_must_fail -m $tree_O $tree_A $tree_B |
| " |
| |
| test_expect_success \ |
| '2 - must match B in !O && !A && B case.' \ |
| "rm -f .git/index NA && |
| cp .orig-B/NA NA && |
| git update-index --add NA && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B" |
| |
| test_expect_success \ |
| '2 - matching B alone is OK in !O && !A && B case.' \ |
| "rm -f .git/index NA && |
| cp .orig-B/NA NA && |
| git update-index --add NA && |
| echo extra >>NA && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B" |
| |
| test_expect_success \ |
| '3 - must match A in !O && A && !B case.' \ |
| "rm -f .git/index AN && |
| cp .orig-A/AN AN && |
| git update-index --add AN && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B && |
| check_result" |
| |
| test_expect_success \ |
| '3 - matching A alone is OK in !O && A && !B case.' \ |
| "rm -f .git/index AN && |
| cp .orig-A/AN AN && |
| git update-index --add AN && |
| echo extra >>AN && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B" |
| |
| test_expect_success \ |
| '3 (fail) - must match A in !O && A && !B case.' " |
| rm -f .git/index AN && |
| cp .orig-A/AN AN && |
| echo extra >>AN && |
| git update-index --add AN && |
| read_tree_must_fail -m $tree_O $tree_A $tree_B |
| " |
| |
| test_expect_success \ |
| '4 - must match and be up-to-date in !O && A && B && A!=B case.' \ |
| "rm -f .git/index AA && |
| cp .orig-A/AA AA && |
| git update-index --add AA && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B && |
| check_result" |
| |
| test_expect_success \ |
| '4 (fail) - must match and be up-to-date in !O && A && B && A!=B case.' " |
| rm -f .git/index AA && |
| cp .orig-A/AA AA && |
| git update-index --add AA && |
| echo extra >>AA && |
| read_tree_must_fail -m $tree_O $tree_A $tree_B |
| " |
| |
| test_expect_success \ |
| '4 (fail) - must match and be up-to-date in !O && A && B && A!=B case.' " |
| rm -f .git/index AA && |
| cp .orig-A/AA AA && |
| echo extra >>AA && |
| git update-index --add AA && |
| read_tree_must_fail -m $tree_O $tree_A $tree_B |
| " |
| |
| test_expect_success \ |
| '5 - must match in !O && A && B && A==B case.' \ |
| "rm -f .git/index LL && |
| cp .orig-A/LL LL && |
| git update-index --add LL && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B && |
| check_result" |
| |
| test_expect_success \ |
| '5 - must match in !O && A && B && A==B case.' \ |
| "rm -f .git/index LL && |
| cp .orig-A/LL LL && |
| git update-index --add LL && |
| echo extra >>LL && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B && |
| check_result" |
| |
| test_expect_success \ |
| '5 (fail) - must match A in !O && A && B && A==B case.' " |
| rm -f .git/index LL && |
| cp .orig-A/LL LL && |
| echo extra >>LL && |
| git update-index --add LL && |
| read_tree_must_fail -m $tree_O $tree_A $tree_B |
| " |
| |
| test_expect_success \ |
| '6 - must not exist in O && !A && !B case' " |
| rm -f .git/index DD && |
| echo DD >DD && |
| git update-index --add DD && |
| read_tree_must_fail -m $tree_O $tree_A $tree_B |
| " |
| |
| test_expect_success \ |
| '7 - must not exist in O && !A && B && O!=B case' " |
| rm -f .git/index DM && |
| cp .orig-B/DM DM && |
| git update-index --add DM && |
| read_tree_must_fail -m $tree_O $tree_A $tree_B |
| " |
| |
| test_expect_success \ |
| '8 - must not exist in O && !A && B && O==B case' " |
| rm -f .git/index DN && |
| cp .orig-B/DN DN && |
| git update-index --add DN && |
| read_tree_must_fail -m $tree_O $tree_A $tree_B |
| " |
| |
| test_expect_success \ |
| '9 - must match and be up-to-date in O && A && !B && O!=A case' \ |
| "rm -f .git/index MD && |
| cp .orig-A/MD MD && |
| git update-index --add MD && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B && |
| check_result" |
| |
| test_expect_success \ |
| '9 (fail) - must match and be up-to-date in O && A && !B && O!=A case' " |
| rm -f .git/index MD && |
| cp .orig-A/MD MD && |
| git update-index --add MD && |
| echo extra >>MD && |
| read_tree_must_fail -m $tree_O $tree_A $tree_B |
| " |
| |
| test_expect_success \ |
| '9 (fail) - must match and be up-to-date in O && A && !B && O!=A case' " |
| rm -f .git/index MD && |
| cp .orig-A/MD MD && |
| echo extra >>MD && |
| git update-index --add MD && |
| read_tree_must_fail -m $tree_O $tree_A $tree_B |
| " |
| |
| test_expect_success \ |
| '10 - must match and be up-to-date in O && A && !B && O==A case' \ |
| "rm -f .git/index ND && |
| cp .orig-A/ND ND && |
| git update-index --add ND && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B && |
| check_result" |
| |
| test_expect_success \ |
| '10 (fail) - must match and be up-to-date in O && A && !B && O==A case' " |
| rm -f .git/index ND && |
| cp .orig-A/ND ND && |
| git update-index --add ND && |
| echo extra >>ND && |
| read_tree_must_fail -m $tree_O $tree_A $tree_B |
| " |
| |
| test_expect_success \ |
| '10 (fail) - must match and be up-to-date in O && A && !B && O==A case' " |
| rm -f .git/index ND && |
| cp .orig-A/ND ND && |
| echo extra >>ND && |
| git update-index --add ND && |
| read_tree_must_fail -m $tree_O $tree_A $tree_B |
| " |
| |
| test_expect_success \ |
| '11 - must match and be up-to-date in O && A && B && O!=A && O!=B && A!=B case' \ |
| "rm -f .git/index MM && |
| cp .orig-A/MM MM && |
| git update-index --add MM && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B && |
| check_result" |
| |
| test_expect_success \ |
| '11 (fail) - must match and be up-to-date in O && A && B && O!=A && O!=B && A!=B case' " |
| rm -f .git/index MM && |
| cp .orig-A/MM MM && |
| git update-index --add MM && |
| echo extra >>MM && |
| read_tree_must_fail -m $tree_O $tree_A $tree_B |
| " |
| |
| test_expect_success \ |
| '11 (fail) - must match and be up-to-date in O && A && B && O!=A && O!=B && A!=B case' " |
| rm -f .git/index MM && |
| cp .orig-A/MM MM && |
| echo extra >>MM && |
| git update-index --add MM && |
| read_tree_must_fail -m $tree_O $tree_A $tree_B |
| " |
| |
| test_expect_success \ |
| '12 - must match A in O && A && B && O!=A && A==B case' \ |
| "rm -f .git/index SS && |
| cp .orig-A/SS SS && |
| git update-index --add SS && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B && |
| check_result" |
| |
| test_expect_success \ |
| '12 - must match A in O && A && B && O!=A && A==B case' \ |
| "rm -f .git/index SS && |
| cp .orig-A/SS SS && |
| git update-index --add SS && |
| echo extra >>SS && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B && |
| check_result" |
| |
| test_expect_success \ |
| '12 (fail) - must match A in O && A && B && O!=A && A==B case' " |
| rm -f .git/index SS && |
| cp .orig-A/SS SS && |
| echo extra >>SS && |
| git update-index --add SS && |
| read_tree_must_fail -m $tree_O $tree_A $tree_B |
| " |
| |
| test_expect_success \ |
| '13 - must match A in O && A && B && O!=A && O==B case' \ |
| "rm -f .git/index MN && |
| cp .orig-A/MN MN && |
| git update-index --add MN && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B && |
| check_result" |
| |
| test_expect_success \ |
| '13 - must match A in O && A && B && O!=A && O==B case' \ |
| "rm -f .git/index MN && |
| cp .orig-A/MN MN && |
| git update-index --add MN && |
| echo extra >>MN && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B && |
| check_result" |
| |
| test_expect_success \ |
| '14 - must match and be up-to-date in O && A && B && O==A && O!=B case' \ |
| "rm -f .git/index NM && |
| cp .orig-A/NM NM && |
| git update-index --add NM && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B && |
| check_result" |
| |
| test_expect_success \ |
| '14 - may match B in O && A && B && O==A && O!=B case' \ |
| "rm -f .git/index NM && |
| cp .orig-B/NM NM && |
| git update-index --add NM && |
| echo extra >>NM && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B && |
| check_result" |
| |
| test_expect_success \ |
| '14 (fail) - must match and be up-to-date in O && A && B && O==A && O!=B case' " |
| rm -f .git/index NM && |
| cp .orig-A/NM NM && |
| git update-index --add NM && |
| echo extra >>NM && |
| read_tree_must_fail -m $tree_O $tree_A $tree_B |
| " |
| |
| test_expect_success \ |
| '14 (fail) - must match and be up-to-date in O && A && B && O==A && O!=B case' " |
| rm -f .git/index NM && |
| cp .orig-A/NM NM && |
| echo extra >>NM && |
| git update-index --add NM && |
| read_tree_must_fail -m $tree_O $tree_A $tree_B |
| " |
| |
| test_expect_success \ |
| '15 - must match A in O && A && B && O==A && O==B case' \ |
| "rm -f .git/index NN && |
| cp .orig-A/NN NN && |
| git update-index --add NN && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B && |
| check_result" |
| |
| test_expect_success \ |
| '15 - must match A in O && A && B && O==A && O==B case' \ |
| "rm -f .git/index NN && |
| cp .orig-A/NN NN && |
| git update-index --add NN && |
| echo extra >>NN && |
| read_tree_must_succeed -m $tree_O $tree_A $tree_B && |
| check_result" |
| |
| test_expect_success \ |
| '15 (fail) - must match A in O && A && B && O==A && O==B case' " |
| rm -f .git/index NN && |
| cp .orig-A/NN NN && |
| echo extra >>NN && |
| git update-index --add NN && |
| read_tree_must_fail -m $tree_O $tree_A $tree_B |
| " |
| |
| # #16 |
| test_expect_success \ |
| '16 - A matches in one and B matches in another.' \ |
| 'rm -f .git/index F16 && |
| echo F16 >F16 && |
| git update-index --add F16 && |
| tree0=`git write-tree` && |
| echo E16 >F16 && |
| git update-index F16 && |
| tree1=`git write-tree` && |
| read_tree_must_succeed -m $tree0 $tree1 $tree1 $tree0 && |
| git ls-files --stage' |
| |
| test_done |
