Andrew's git - gitweb.git/blob - t/t6010-merge-base.sh

   1#!/bin/sh
   2#
   3# Copyright (c) 2005 Junio C Hamano
   4#
   5
   6test_description='Merge base and parent list computation.
   7'
   8
   9. ./test-lib.sh
  10
  11test_expect_success 'setup' '
  12        T=$(git write-tree) &&
  13
  14        M=1130000000 &&
  15        Z=+0000 &&
  16
  17        GIT_COMMITTER_EMAIL=git@comm.iter.xz &&
  18        GIT_COMMITTER_NAME="C O Mmiter" &&
  19        GIT_AUTHOR_NAME="A U Thor" &&
  20        GIT_AUTHOR_EMAIL=git@au.thor.xz &&
  21        export GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL &&
  22
  23        doit() {
  24                OFFSET=$1 &&
  25                NAME=$2 &&
  26                shift 2 &&
  27
  28                PARENTS= &&
  29                for P
  30                do
  31                        PARENTS="${PARENTS}-p $P "
  32                done &&
  33
  34                GIT_COMMITTER_DATE="$(($M + $OFFSET)) $Z" &&
  35                GIT_AUTHOR_DATE=$GIT_COMMITTER_DATE &&
  36                export GIT_COMMITTER_DATE GIT_AUTHOR_DATE &&
  37
  38                commit=$(echo $NAME | git commit-tree $T $PARENTS) &&
  39
  40                echo $commit >.git/refs/tags/$NAME &&
  41                echo $commit
  42        }
  43'
  44
  45test_expect_success 'set up G and H' '
  46        # E---D---C---B---A
  47        # \"-_         \   \
  48        #  \  `---------G   \
  49        #   \                \
  50        #    F----------------H
  51        E=$(doit 5 E) &&
  52        D=$(doit 4 D $E) &&
  53        F=$(doit 6 F $E) &&
  54        C=$(doit 3 C $D) &&
  55        B=$(doit 2 B $C) &&
  56        A=$(doit 1 A $B) &&
  57        G=$(doit 7 G $B $E) &&
  58        H=$(doit 8 H $A $F)
  59'
  60
  61test_expect_success 'merge-base G H' '
  62        git name-rev $B >expected &&
  63
  64        MB=$(git merge-base G H) &&
  65        git name-rev "$MB" >actual.single &&
  66
  67        MB=$(git merge-base --all G H) &&
  68        git name-rev "$MB" >actual.all &&
  69
  70        MB=$(git show-branch --merge-base G H) &&
  71        git name-rev "$MB" >actual.sb &&
  72
  73        test_cmp expected actual.single &&
  74        test_cmp expected actual.all &&
  75        test_cmp expected actual.sb
  76'
  77
  78test_expect_success 'merge-base/show-branch --independent' '
  79        git name-rev "$H" >expected1 &&
  80        git name-rev "$H" "$G" >expected2 &&
  81
  82        parents=$(git merge-base --independent H) &&
  83        git name-rev $parents >actual1.mb &&
  84        parents=$(git merge-base --independent A H G) &&
  85        git name-rev $parents >actual2.mb &&
  86
  87        parents=$(git show-branch --independent H) &&
  88        git name-rev $parents >actual1.sb &&
  89        parents=$(git show-branch --independent A H G) &&
  90        git name-rev $parents >actual2.sb &&
  91
  92        test_cmp expected1 actual1.mb &&
  93        test_cmp expected2 actual2.mb &&
  94        test_cmp expected1 actual1.sb &&
  95        test_cmp expected2 actual2.sb
  96'
  97
  98test_expect_success 'unsynchronized clocks' '
  99        # This test is to demonstrate that relying on timestamps in a distributed
 100        # SCM to provide a _consistent_ partial ordering of commits leads to
 101        # insanity.
 102        #
 103        #               Relative
 104        # Structure     timestamps
 105        #
 106        #   PL  PR        +4  +4
 107        #  /  \/  \      /  \/  \
 108        # L2  C2  R2    +3  -1  +3
 109        # |   |   |     |   |   |
 110        # L1  C1  R1    +2  -2  +2
 111        # |   |   |     |   |   |
 112        # L0  C0  R0    +1  -3  +1
 113        #   \ |  /        \ |  /
 114        #     S             0
 115        #
 116        # The left and right chains of commits can be of any length and complexity as
 117        # long as all of the timestamps are greater than that of S.
 118
 119        S=$(doit  0 S) &&
 120
 121        C0=$(doit -3 C0 $S) &&
 122        C1=$(doit -2 C1 $C0) &&
 123        C2=$(doit -1 C2 $C1) &&
 124
 125        L0=$(doit  1 L0 $S) &&
 126        L1=$(doit  2 L1 $L0) &&
 127        L2=$(doit  3 L2 $L1) &&
 128
 129        R0=$(doit  1 R0 $S) &&
 130        R1=$(doit  2 R1 $R0) &&
 131        R2=$(doit  3 R2 $R1) &&
 132
 133        PL=$(doit  4 PL $L2 $C2) &&
 134        PR=$(doit  4 PR $C2 $R2) &&
 135
 136        git name-rev $C2 >expected &&
 137
 138        MB=$(git merge-base PL PR) &&
 139        git name-rev "$MB" >actual.single &&
 140
 141        MB=$(git merge-base --all PL PR) &&
 142        git name-rev "$MB" >actual.all &&
 143
 144        test_cmp expected actual.single &&
 145        test_cmp expected actual.all
 146'
 147
 148test_expect_success '--independent with unsynchronized clocks' '
 149        IB=$(doit 0 IB) &&
 150        I1=$(doit -10 I1 $IB) &&
 151        I2=$(doit  -9 I2 $I1) &&
 152        I3=$(doit  -8 I3 $I2) &&
 153        I4=$(doit  -7 I4 $I3) &&
 154        I5=$(doit  -6 I5 $I4) &&
 155        I6=$(doit  -5 I6 $I5) &&
 156        I7=$(doit  -4 I7 $I6) &&
 157        I8=$(doit  -3 I8 $I7) &&
 158        IH=$(doit  -2 IH $I8) &&
 159
 160        echo $IH >expected &&
 161        git merge-base --independent IB IH >actual &&
 162        test_cmp expected actual
 163'
 164
 165test_expect_success 'merge-base for octopus-step (setup)' '
 166        # Another set to demonstrate base between one commit and a merge
 167        # in the documentation.
 168        #
 169        # * C (MMC) * B (MMB) * A  (MMA)
 170        # * o       * o       * o
 171        # * o       * o       * o
 172        # * o       * o       * o
 173        # * o       | _______/
 174        # |         |/
 175        # |         * 1 (MM1)
 176        # | _______/
 177        # |/
 178        # * root (MMR)
 179
 180        test_commit MMR &&
 181        test_commit MM1 &&
 182        test_commit MM-o &&
 183        test_commit MM-p &&
 184        test_commit MM-q &&
 185        test_commit MMA &&
 186        git checkout MM1 &&
 187        test_commit MM-r &&
 188        test_commit MM-s &&
 189        test_commit MM-t &&
 190        test_commit MMB &&
 191        git checkout MMR &&
 192        test_commit MM-u &&
 193        test_commit MM-v &&
 194        test_commit MM-w &&
 195        test_commit MM-x &&
 196        test_commit MMC
 197'
 198
 199test_expect_success 'merge-base A B C' '
 200        git rev-parse --verify MM1 >expected &&
 201        git rev-parse --verify MMR >expected.sb &&
 202
 203        git merge-base --all MMA MMB MMC >actual &&
 204        git merge-base --all --octopus MMA MMB MMC >actual.common &&
 205        git show-branch --merge-base MMA MMB MMC >actual.sb &&
 206
 207        test_cmp expected actual &&
 208        test_cmp expected.sb actual.common &&
 209        test_cmp expected.sb actual.sb
 210'
 211
 212test_expect_success 'criss-cross merge-base for octopus-step' '
 213        git reset --hard MMR &&
 214        test_commit CC1 &&
 215        git reset --hard E &&
 216        test_commit CC2 &&
 217        test_tick &&
 218        git merge -s ours CC1 &&
 219        test_commit CC-o &&
 220        test_commit CCB &&
 221        git reset --hard CC1 &&
 222        git merge -s ours CC2 &&
 223        test_commit CCA &&
 224
 225        git rev-parse CC1 CC2 >expected &&
 226        git merge-base --all CCB CCA^^ CCA^^2 >actual &&
 227
 228        sort expected >expected.sorted &&
 229        sort actual >actual.sorted &&
 230        test_cmp expected.sorted actual.sorted
 231'
 232
 233test_done