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96ec83ce52
"git rebase" immediately after "git clone" failed to find the fork point from the upstream. * jk/merge-base-fork-point-without-reflog: merge-base: handle --fork-point without reflog
309 lines
7.1 KiB
Bash
Executable File
309 lines
7.1 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2005 Junio C Hamano
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#
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test_description='Merge base and parent list computation.
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'
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. ./test-lib.sh
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M=1130000000
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Z=+0000
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GIT_COMMITTER_EMAIL=git@comm.iter.xz
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GIT_COMMITTER_NAME='C O Mmiter'
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GIT_AUTHOR_NAME='A U Thor'
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GIT_AUTHOR_EMAIL=git@au.thor.xz
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export GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL
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doit () {
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OFFSET=$1 &&
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NAME=$2 &&
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shift 2 &&
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PARENTS= &&
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for P
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do
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PARENTS="${PARENTS}-p $P "
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done &&
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GIT_COMMITTER_DATE="$(($M + $OFFSET)) $Z" &&
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GIT_AUTHOR_DATE=$GIT_COMMITTER_DATE &&
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export GIT_COMMITTER_DATE GIT_AUTHOR_DATE &&
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commit=$(echo $NAME | git commit-tree $T $PARENTS) &&
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echo $commit >.git/refs/tags/$NAME &&
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echo $commit
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}
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test_expect_success 'setup' '
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T=$(git mktree </dev/null)
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'
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test_expect_success 'set up G and H' '
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# E---D---C---B---A
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# \"-_ \ \
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# \ `---------G \
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# \ \
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# F----------------H
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E=$(doit 5 E) &&
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D=$(doit 4 D $E) &&
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F=$(doit 6 F $E) &&
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C=$(doit 3 C $D) &&
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B=$(doit 2 B $C) &&
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A=$(doit 1 A $B) &&
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G=$(doit 7 G $B $E) &&
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H=$(doit 8 H $A $F)
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'
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test_expect_success 'merge-base G H' '
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git name-rev $B >expected &&
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MB=$(git merge-base G H) &&
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git name-rev "$MB" >actual.single &&
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MB=$(git merge-base --all G H) &&
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git name-rev "$MB" >actual.all &&
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MB=$(git show-branch --merge-base G H) &&
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git name-rev "$MB" >actual.sb &&
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test_cmp expected actual.single &&
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test_cmp expected actual.all &&
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test_cmp expected actual.sb
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'
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test_expect_success 'merge-base/show-branch --independent' '
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git name-rev "$H" >expected1 &&
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git name-rev "$H" "$G" >expected2 &&
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parents=$(git merge-base --independent H) &&
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git name-rev $parents >actual1.mb &&
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parents=$(git merge-base --independent A H G) &&
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git name-rev $parents >actual2.mb &&
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parents=$(git show-branch --independent H) &&
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git name-rev $parents >actual1.sb &&
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parents=$(git show-branch --independent A H G) &&
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git name-rev $parents >actual2.sb &&
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test_cmp expected1 actual1.mb &&
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test_cmp expected2 actual2.mb &&
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test_cmp expected1 actual1.sb &&
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test_cmp expected2 actual2.sb
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'
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test_expect_success 'unsynchronized clocks' '
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# This test is to demonstrate that relying on timestamps in a distributed
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# SCM to provide a _consistent_ partial ordering of commits leads to
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# insanity.
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#
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# Relative
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# Structure timestamps
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#
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# PL PR +4 +4
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# / \/ \ / \/ \
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# L2 C2 R2 +3 -1 +3
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# | | | | | |
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# L1 C1 R1 +2 -2 +2
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# | | | | | |
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# L0 C0 R0 +1 -3 +1
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# \ | / \ | /
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# S 0
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#
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# The left and right chains of commits can be of any length and complexity as
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# long as all of the timestamps are greater than that of S.
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S=$(doit 0 S) &&
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C0=$(doit -3 C0 $S) &&
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C1=$(doit -2 C1 $C0) &&
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C2=$(doit -1 C2 $C1) &&
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L0=$(doit 1 L0 $S) &&
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L1=$(doit 2 L1 $L0) &&
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L2=$(doit 3 L2 $L1) &&
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R0=$(doit 1 R0 $S) &&
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R1=$(doit 2 R1 $R0) &&
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R2=$(doit 3 R2 $R1) &&
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PL=$(doit 4 PL $L2 $C2) &&
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PR=$(doit 4 PR $C2 $R2) &&
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git name-rev $C2 >expected &&
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MB=$(git merge-base PL PR) &&
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git name-rev "$MB" >actual.single &&
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MB=$(git merge-base --all PL PR) &&
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git name-rev "$MB" >actual.all &&
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test_cmp expected actual.single &&
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test_cmp expected actual.all
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'
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test_expect_success '--independent with unsynchronized clocks' '
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IB=$(doit 0 IB) &&
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I1=$(doit -10 I1 $IB) &&
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I2=$(doit -9 I2 $I1) &&
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I3=$(doit -8 I3 $I2) &&
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I4=$(doit -7 I4 $I3) &&
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I5=$(doit -6 I5 $I4) &&
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I6=$(doit -5 I6 $I5) &&
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I7=$(doit -4 I7 $I6) &&
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I8=$(doit -3 I8 $I7) &&
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IH=$(doit -2 IH $I8) &&
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echo $IH >expected &&
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git merge-base --independent IB IH >actual &&
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test_cmp expected actual
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'
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test_expect_success 'merge-base for octopus-step (setup)' '
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# Another set to demonstrate base between one commit and a merge
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# in the documentation.
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#
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# * C (MMC) * B (MMB) * A (MMA)
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# * o * o * o
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# * o * o * o
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# * o * o * o
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# * o | _______/
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# | |/
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# | * 1 (MM1)
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# | _______/
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# |/
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# * root (MMR)
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test_commit MMR &&
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test_commit MM1 &&
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test_commit MM-o &&
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test_commit MM-p &&
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test_commit MM-q &&
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test_commit MMA &&
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git checkout MM1 &&
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test_commit MM-r &&
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test_commit MM-s &&
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test_commit MM-t &&
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test_commit MMB &&
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git checkout MMR &&
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test_commit MM-u &&
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test_commit MM-v &&
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test_commit MM-w &&
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test_commit MM-x &&
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test_commit MMC
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'
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test_expect_success 'merge-base A B C' '
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git rev-parse --verify MM1 >expected &&
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git rev-parse --verify MMR >expected.sb &&
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git merge-base --all MMA MMB MMC >actual &&
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git merge-base --all --octopus MMA MMB MMC >actual.common &&
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git show-branch --merge-base MMA MMB MMC >actual.sb &&
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test_cmp expected actual &&
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test_cmp expected.sb actual.common &&
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test_cmp expected.sb actual.sb
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'
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test_expect_success 'criss-cross merge-base for octopus-step' '
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git reset --hard MMR &&
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test_commit CC1 &&
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git reset --hard E &&
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test_commit CC2 &&
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test_tick &&
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# E is a root commit unrelated to MMR root on which CC1 is based
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git merge -s ours --allow-unrelated-histories CC1 &&
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test_commit CC-o &&
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test_commit CCB &&
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git reset --hard CC1 &&
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# E is a root commit unrelated to MMR root on which CC1 is based
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git merge -s ours --allow-unrelated-histories CC2 &&
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test_commit CCA &&
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git rev-parse CC1 CC2 >expected &&
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git merge-base --all CCB CCA^^ CCA^^2 >actual &&
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sort expected >expected.sorted &&
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sort actual >actual.sorted &&
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test_cmp expected.sorted actual.sorted
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'
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test_expect_success 'using reflog to find the fork point' '
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git reset --hard &&
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git checkout -b base $E &&
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(
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for count in 1 2 3
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do
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git commit --allow-empty -m "Base commit #$count" &&
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git rev-parse HEAD >expect$count &&
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git checkout -B derived &&
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git commit --allow-empty -m "Derived #$count" &&
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git rev-parse HEAD >derived$count &&
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git checkout -B base $E || exit 1
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done
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for count in 1 2 3
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do
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git merge-base --fork-point base $(cat derived$count) >actual &&
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test_cmp expect$count actual || exit 1
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done
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) &&
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# check that we correctly default to HEAD
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git checkout derived &&
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git merge-base --fork-point base >actual &&
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test_cmp expect3 actual
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'
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test_expect_success '--fork-point works with empty reflog' '
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git -c core.logallrefupdates=false branch no-reflog base &&
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git merge-base --fork-point no-reflog derived &&
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test_cmp expect3 actual
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'
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test_expect_success 'merge-base --octopus --all for complex tree' '
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# Best common ancestor for JE, JAA and JDD is JC
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# JE
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# / |
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# / |
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# / |
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# JAA / |
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# |\ / |
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# | \ | JDD |
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# | \ |/ | |
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# | JC JD |
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# | | /| |
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# | |/ | |
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# JA | | |
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# |\ /| | |
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# X JB | X X
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# \ \ | / /
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# \__\|/___/
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# J
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test_commit J &&
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test_commit JB &&
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git reset --hard J &&
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test_commit JC &&
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git reset --hard J &&
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test_commit JTEMP1 &&
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test_merge JA JB &&
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test_merge JAA JC &&
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git reset --hard J &&
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test_commit JTEMP2 &&
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test_merge JD JB &&
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test_merge JDD JC &&
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git reset --hard J &&
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test_commit JTEMP3 &&
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test_merge JE JC &&
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git rev-parse JC >expected &&
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git merge-base --all --octopus JAA JDD JE >actual &&
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test_cmp expected actual
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'
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test_done
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